JP7853666B2 - Resin composition and resin-containing member - Google Patents

Description

This disclosure relates to a resin composition containing lignin modified with a glycol-based compound (also referred to herein as "glycol-modified lignin") and acrylonitrile-butadiene-styrene copolymer (ABS resin), and to a resin-containing component having a resin-containing portion formed from such resin composition.

In recent years, with the growing awareness of environmental protection, there has been research into manufacturing resin-containing components using resin compositions obtained by mixing wood-derived components, such as wood powder, with resin. For example, Patent Document 1 discloses a thermoplastic acrylonitrile-butadiene-styrene copolymer/lignin blend comprising (i) a certain amount of lignin; (ii) a certain amount of acrylonitrile-butadiene-styrene copolymer; and (iii) a certain amount of a compatibilizer, wherein the lignin is present in an amount of at least 5% by mass of the total mass of components (i) and (ii), and the compatibilizer accounts for approximately 0.5 to 25% by mass of the total mass of the blend.

Patent Document 2 provides a method for producing glycol lignin, comprising the steps of: (a) solvolysis of lignocellulose in at least one glycol-based pulping solvent selected from polyethylene glycol, diethylene glycol, ethylene glycol, propylene glycol, polypropylene glycol, glycerin, and polyglycerin under atmospheric pressure and in the presence of an acid catalyst; (b) mixing the reaction mixture after the solvolysis step with a dilute alkali, and then separating the solution fraction containing glycol lignin from the solid component; (c) obtaining glycol lignin as a precipitate by acidifying the solution fraction with sulfuric acid; (d) separating the glycol lignin precipitate from the solution fraction acidified with sulfuric acid; (e) accumulating the supernatant after separation of the glycol lignin precipitate and neutralizing the accumulated solution by adding sodium hydroxide; (f) concentrating the neutralized solution to a water content of 10% or less by heating and recovering the pulping solvent; and (g) separating the sodium sulfate crystals produced by the concentration. This information has been disclosed.

Japanese Patent Publication No. 2020-70439 Japanese Patent Publication No. 2017-197517

According to Patent Document 1 mentioned above, lignin, a wood-derived component, is incompatible with ABS resin, making the inclusion of a compatibilizer essential. In such resin-containing components, strict control of the amount of additives, such as compatibilizers, in the resin composition is necessary to ensure appropriate various properties.

The present invention aims to provide a resin composition that contains components derived from wood-based materials, yet does not require special additives (compatibilizers) to improve compatibility, or allows for a lower compatibilizer content compared to conventional technologies, and a resin-containing component formed from such a resin composition.

A resin composition according to one aspect of the present invention, provided to solve the above problems, comprises an ABS resin and glycol-modified lignin, which is lignin modified with a glycol-based compound. In this specification, "ABS resin" means a copolymer of monomers containing acrylonitrile, butadiene, and styrene. Because glycol-modified lignin is modified with a glycol-based compound, it has higher amphiphilicity than lignin. Therefore, glycol-modified lignin interacts more readily with ABS resin than general industrial lignin, and its mechanical properties are less likely to deteriorate even without the presence of a compatibilizer.

In the above-mentioned resin composition, one specific example is that the glycol compound includes polyethylene glycol. In this case, the polyethylene glycol preferably has an average molecular weight of 200 to 600.

When the above resin composition is analyzed by pyrolysis gas chromatography, fragments derived from the glycol-modified lignin are detected. Specifically, a spectrum is obtained that has peaks based on components derived from residues of glycol compounds used in the production of the glycol-modified lignin.

In another aspect, the present invention provides a resin-containing member having a resin-containing portion formed from the above-described resin composition.

In another aspect, the present invention provides a resin-containing member having a resin-containing portion formed from a resin composition containing glycol-modified lignin (lignin modified with a glycol-based compound) and ABS resin, wherein when the resin-containing portion is analyzed by pyrolysis gas chromatography, fragments originating from the glycol-modified lignin are measured.

In the resin-containing member described above, the glycol compound may also contain polyethylene glycol.

The present invention provides a resin composition that contains wood-derived components but does not require any special additives to improve compatibility, and a resin-containing member formed from such a resin composition.

This is a bar graph showing the results in Table 2. This is a spectral diagram showing the results (sum of measurements at all m/z values) of the glycol-modified lignin produced in Production Example 1, measured by pyrolysis gas chromatography. This is a spectral diagram showing the results of measuring ABS resin using pyrolysis gas chromatography (sum of measurements at all m/z values). This is a spectral diagram showing the results (sum of measurements at all m/z values) of the sample from Example 1 measured by pyrolysis gas chromatography. This is a spectral diagram showing the results (sum of measurements at all m/z values) of the sample from Comparative Example 1 measured by pyrolysis gas chromatography. This is a spectral diagram showing the results (m/z value: 133) of measuring glycol-modified lignin produced in Production Example 1 using pyrolysis gas chromatography. This is a spectral diagram showing the results (m/z value: 133) of measuring the sample from Example 1 using pyrolysis gas chromatography. This is a spectral diagram showing the results (m/z value: 133) of measuring the sample of Comparative Example 1 by pyrolysis gas chromatography. This is a bar graph showing the results in Table 4.

The following explanation of this disclosure will be provided with reference to the drawings.

A resin composition according to one embodiment of the present invention contains glycol-modified lignin, which is lignin modified with a glycol-based compound as a filler, and ABS resin. Glycol-modified lignin is contained in a solution fraction obtained by filtering a mixture after solvolysis of a wood raw material, such as wood flour containing lignocellulose, with a reaction solution containing a glycol-based compound such as polyethylene glycol, as described in Patent Document 2, for example.

Glycol-modified lignin is obtained by adding a glycol-based compound to lignin. Glycol modification increases the amphiphilicity of the lignin, making it more readily interacts with ABS resin. Therefore, even without the addition of special additives to enhance compatibility in the resin composition of this embodiment, resin-containing components formed from this resin composition exhibit superior mechanical properties. Specifically, the impact strength is less likely to decrease compared to cases containing general industrial lignin.

Examples of glycol compounds include ethylene glycol, diethylene glycol, polyethylene glycol of various molecular weights, propylene glycol, polypropylene glycol of various molecular weights, glycerin (glycerol), and polyglycerin (polyglycerol) of various molecular weights. These can be used individually or in combination of two or more. As an example without limitation, polyethylene glycol with an average molecular weight of 200 to 600 is preferred. If the average molecular weight of polyethylene glycol is excessively high, the reactivity between polyethylene glycol and wood raw materials decreases, significantly reducing the separation and recovery efficiency of lignin.

When producing glycol-modified lignin, the wood raw material reacting with glycol compounds is preferably a conifer, and more preferably Japanese cedar (Cryptomeria japonica). In particular, Japanese cedar, being genetically homogeneous (i.e., clones), exhibits low diversity in the polymer structure that constitutes it. Therefore, using Japanese cedar as the wood raw material makes it easier to obtain glycol-modified lignin with excellent quality stability. Sulfuric acid is a specific example of a catalyst for solvolysis; the mixture obtained by solvolysis of the wood raw material is diluted with alkali, and the glycol-modified lignin is contained in the liquid fraction obtained by filtering the diluted mixture.

When glycol-modified lignin is measured by pyrolysis gas chromatography, the measured spectrum (Figure 1) shows peaks even during the time period when peaks are generally absent when measuring ABS resin (Figure 2). Therefore, these peaks are considered to be peaks derived from components of glycol-modified lignin fragments (peaks based on glycol-modified lignin). Since these glycol-modified lignin-based peaks are not observed in the spectrum of an ABS resin composition using non-glycol-modified kraft lignin as a filler (Figure 3), it is thought that these peaks include components derived from residues of glycol-based compounds used in the production of glycol-modified lignin.

Therefore, if a resin composition containing ABS resin and a filler, or a resin-containing component based on this resin composition, is measured by pyrolysis gas chromatography and a peak based on glycol-modified lignin fragments is observed in the resulting spectrum, it can be presumed that glycol-modified lignin is included as a filler.

When performing the measurements described above, it is preferable to optimize the analytical instrument from the viewpoint of more accurately evaluating whether or not glycol-modified lignin is present as a packing material. If the pyrolysis gas chromatography system has a mass spectrometer as an analytical instrument, by appropriately selecting the m/z value (as shown in the examples described later, 133 is a specific example), it is possible to obtain more accurate information on whether or not glycol-modified lignin is present as a packing material.

The ratio of the acrylonitrile-based portion, the butadiene-based portion, and the styrene-based portion in the ABS resin contained in the resin composition according to this embodiment is not limited. Furthermore, the ABS resin may contain monomers other than acrylonitrile, butadiene, and styrene, or it may be a blend of other resins.

The glycol-modified lignin content in the resin composition of this embodiment is set appropriately depending on the application. Generally, by setting the glycol-modified lignin content to several mass percent or more, the effects based on its inclusion can be stably obtained.

Another example of the effect of incorporating glycol-modified lignin into ABS resin is the improvement of its mechanical properties. Specifically, it can improve the flexural modulus as defined in K7171:2016 (ISO 178:2010, Amd. 1:2013). The basic trend is that the higher the glycol-modified lignin content, the higher the flexural modulus. The fact that lignin is a substance with aromatic rings, and that the styrene-based portion of ABS resin also contains aromatic rings, may be influencing the improvement in flexural modulus mentioned above.

Furthermore, as described in Patent Document 1, the impact strength (K7160-1996 (ISO 8256:1990)) of the resin composition may decrease when lignin is included. However, in the case of the resin composition of this embodiment, where the lignin contained in the ABS resin includes glycol-modified lignin, and especially when it consists of glycol-modified lignin, it is possible to suppress the decrease in impact strength without including any special phase solvent.

Another example of the effect of incorporating glycol-modified lignin into ABS resin is that the resin composition becomes less flammable. Lignin is a substance that possesses an aromatic ring, a characteristic that is almost unique among plant-derived structure-forming materials. Aromatic compounds are less prone to oxidation than aliphatic compounds, and as a result, are less flammable. Therefore, it is expected that the resin composition according to this embodiment, which contains glycol-modified lignin, can reduce the amount of flame retardant required to obtain the desired level of flame retardancy compared to a composition without glycol-modified lignin.

The resin composition according to this embodiment may contain various additives depending on the required functions of the resin-containing member obtained by molding the resin composition. Specific examples of such additives include pigments (organic and inorganic), colorants such as dyes, lubricants, plasticizers such as carboxylic acid esters, mold release agents including higher fatty acids and their metal salts, antioxidants, flame retardants (organic and inorganic), UV absorbers such as benzotriazoles, antibacterial agents such as quaternary ammonium salts, surfactants (nonionic, anionic, cationic, and amphoteric), antistatic agents such as fatty acid esters, weather stabilizers, heat stabilizers, slip inhibitors, anti-aging agents, hydrochloric acid absorbers, impact modifiers, and crosslinking agents (in the case of thermoplastic resins).

These additives can be used individually or in combination of two or more. The content of these additives is not particularly limited, depending on the application, as long as it does not impair the objectives of the present invention. As described above, the resin composition according to this embodiment does not require a compatibilizer; however, to particularly enhance the compatibilities of the resin composition, a compatibilizer such as that disclosed in Patent Document 1 may be used as an additive.

A resin-containing member according to one embodiment of the present invention has a portion formed from the resin composition according to this embodiment. The resin-containing member may be entirely composed of a resin-containing portion formed from the resin composition according to this embodiment, or the resin-containing portion may be a part of the resin-containing member. Specific examples of cases where the resin-containing portion is a part of the resin-containing member include cases where the resin-containing member is formed by insert molding including a metal material, by multi-color molding with other resin compositions, or where other materials such as plating are provided on the surface of the resin-containing portion. As mentioned above, since the resin composition according to this embodiment is flame-retardant, the resin-containing member is also expected to have relatively flame-retardant properties.

The present invention will be described in detail below using examples.

(Manufacturing example 1)
Glycol-modified lignin was obtained according to the manufacturing method described in Example 1 of Patent Document 2. Specifically, solvolysis was performed using air-dried cedar wood powder as a raw material and polyethylene glycol with an average molecular weight of 200 to 600. A filter press was performed on the mixture after the solvolysis reaction to obtain a solution fraction, to which sulfuric acid was added to obtain a glycol lignin suspension. The obtained glycol lignin suspension was centrifuged and further dried to obtain glycol-modified lignin. Because the process includes a step of centrifuging the glycol lignin suspension, it can be considered that the final obtained glycol-modified lignin is substantially free of unreacted polyethylene glycol.

(Example 1)
A resin composition was obtained by mixing 14.25 kg of ABS resin (PA-757, manufactured by Chi Mei Industrial Co., Ltd.) with 0.75 kg of glycol-modified lignin obtained in Production Example 1 as a filler, and kneading the mixture in a twin-screw extruder. The amount of glycol-modified lignin in this resin composition was 5% by mass.

(Reference example 1)
A resin composition made of the ABS resin used in Example 1 was prepared.

(Comparative Example 1)
A resin composition was obtained by mixing 9.50 kg of ABS resin (PA-757, manufactured by Chi Mei Industrial Co., Ltd.) with 0.50 kg of Kraft Lignin as a filler and kneading the mixture in a twin-screw extruder. The amount of Kraft Lignin in this resin composition was 5% by mass.

<Evaluation>
The resin compositions obtained in each example were injection molded to produce rectangular test specimens for bending tests, 75 mm diameter disc-shaped test specimens, and Charpy impact test specimens. The resin compositions and molded products obtained in each example were evaluated and observed using the following methods.

(1) Melt flow rate The melt flow rate of the resin composition for each example was measured using a cylindrical extrusion plastometer as defined in JIS K6760, in accordance with the method specified in K7210-1:2014 (ISO 1133-1:2011) (unit: g/10 min). Specifically, the weight used to pressurize the resin composition was 2.16 kg, and the holding temperature of the resin composition was 230°C.

(2) Temperature of deflection under load In accordance with JIS K7191-2:2015 (ISO 75-2:2013), the test specimen was heated at 120°C/h with a bending stress of 1.8 MPa applied to the specimen, and the temperature at which the specified deflection amount of a 4 mm thick test specimen reached 0.34 mm was determined.

(3) Dielectric constant The dielectric constant at a frequency of 1 GHz was measured using the capacitance method with an impedance analyzer E4991A (manufactured by Agilent Technologies).

(4) Bending strength In accordance with JIS K6911 (1995 edition), bending strength (unit: MPa) and bending modulus (unit: MPa) were measured at a crosshead speed of 2 mm/min, and tensile strength (unit: kJ/ ^m² ) was measured at a crosshead speed of 50 mm/min.

(5) Impact strength The impact strength was measured using a U-shaped notched test specimen in accordance with JIS K7111 (1995 edition). The measurement temperature was 23°C.

(6) Pyrolysis Gas Chromatography Samples cut from the molded product were heated to 600°C in a pyrolysis furnace (Frontier Labs "EGA/PY-3030D"), and the gas generated at this time was analyzed using a GC-MS instrument (Agilent Technology "7890A/5975C", column: "DB-5MS UI" (length 20m, inner diameter 0.18mm, film thickness 0.18mm), carrier gas: helium), column pressure: 158.6kPa. The heating conditions for the GC section were as follows.
Starting temperature 40°C (hold for 1 minute)
Heat up to 300°C at a rate of 12°C/min. After heating, hold for 10 minutes.

The evaluation results are shown in Table 1.

As shown in Table 1, compared to the case without filler (Reference Example 1), an increase in MFR was observed when conventional industrial lignin (Kraft Lignin) was used (Comparative Example 1). However, when glycol-modified lignin was used at the same mixing ratio as in Comparative Example 1 (Example 1), a decrease in MFR was observed, the opposite of the case in Comparative Example 1. This result may indicate that the interaction between the ABS resin and the filler was higher in Example 1 compared to Comparative Example 1.

Table 2 shows the ratio (in %) of the results of Example 1 to the results of Comparative Example 1, and Figure 1 shows the results of Table 2 as a graph.

Comparing the results of Example 1 with those of Comparative Example 1, as mentioned above, the MFR of Example 1 is half that of Comparative Example 1. Regarding other physical properties, the impact strength of Example 1 is clearly improved compared to Comparative Example 1, but for other physical properties, the results of Example 1 and Comparative Example 1 were generally the same. Thus, since the ABS resin containing glycol-modified lignin according to the present invention exhibited many mechanical and dielectric properties equivalent to those of ABS resin containing general industrial lignin, it can be said that the glycol-modified lignin according to the present invention can be used as a substitute material for general industrial lignin. Furthermore, since 1.2 times the impact strength was obtained compared to ABS resin containing general industrial lignin, Table 2 and Figure 1 indicate that replacing general industrial lignin with the glycol-modified lignin according to the present invention can result in an ABS resin with superior properties.

Regarding load deflection, dielectric constant, bending strength, and tensile strength, the results of Example 1 did not differ significantly from those of Comparative Example 1 and Reference Example 1. It was confirmed that the physical properties of these evaluation items were minimal due to the inclusion of lignin.

Regarding impact strength, as described in Patent Document 1, a decrease was observed when lignin was included in the resin composition. However, the decrease in impact strength when glycol-modified lignin was used (Example 1) was significantly less than when general industrial lignin was used (Comparative Example 1).

The sample from Example 1 was measured by pyrolysis gas chromatography, and the resulting spectrum showed a peak based on glycol-modified lignin. Figure 2 shows the spectral result (sum of all m/z values) of glycol-modified lignin prepared in Production Example 1 measured by pyrolysis gas chromatography. Figure 3 shows the spectral result (sum of all m/z values) of ABS resin measured by pyrolysis gas chromatography. Figure 4 shows the spectral result (sum of all m/z values) of the sample from Example 1 measured by pyrolysis gas chromatography. Figure 5 shows the spectral result (sum of all m/z values) of the sample from Comparative Example 1 measured by pyrolysis gas chromatography.

As shown in Figure 2, when glycol-modified lignin was measured, multiple peaks were obtained during the time period from 18 minutes to 30 minutes (indicated by white arrows in Figure 2). In particular, strong peaks were observed at 18 minutes, 20.5 minutes, 22.5 minutes, after 24 minutes, and at 25.5 minutes. Of these peaks, all except the one at 25.5 minutes (indicated by white inverted triangles "▽" in Figure 2) were presumed to be peaks derived from components originating from residues of polyethylene glycol, a glycol-based compound used in the production of glycol-modified lignin.

In contrast, as shown in Figure 3, when ABS resin was measured, there were almost no peaks after 21 minutes. Therefore, the presence or absence of glycol-modified lignin in the resin composition can be evaluated based on the peak intensity after 20 minutes, especially after 21 minutes. Specifically, in this example, if a peak of fragments derived from polyethylene glycol is observed in the spectrum, it can be presumed that glycol-modified lignin is present.

In the spectrum of Example 1 shown in Figure 4, multiple peaks were observed even after 21 minutes, when the peaks of components derived from ABS resin almost disappeared. Figure 4 shows the locations of the four strong peaks (indicated by white inverted triangles "▽") that appeared in Figure 2. Clear peaks were present at these locations, confirming that the resin composition of the sample in Example 1 contained glycol-modified lignin as a filler.

In contrast, in Comparative Example 1, shown in Figure 5, the peak based on polyethylene glycol was weaker compared to Example 1. Similar to Figure 4, the locations where the polyethylene glycol-based peaks appeared (indicated by white inverted triangles "▽") were shown in Figure 5 for verification. However, it could not be said that a clear peak was observed at all of these locations.

From the measurement results shown in Figures 2 to 5 above, it was confirmed that by measuring a resin composition containing ABS resin and filler, or a resin-containing component based on this resin composition, using pyrolysis gas chromatography, and evaluating the peaks based on glycol-modified lignin, particularly those derived from residues of glycol compounds used in the production of glycol-modified lignin (peak position, peak intensity), information can be obtained regarding whether or not glycol-modified lignin is included as a filler.

We investigated a more reliable method for obtaining information on whether or not glycol-modified lignin is included as a filler in resin compositions and resin-containing components. The results are explained using Figures 6 to 8. Figure 6 is a spectral diagram showing the results (m/z value: 133) of the glycol-modified lignin produced in Production Example 1 measured by pyrolysis gas chromatography. Figure 7 is a spectral diagram showing the results (m/z value: 133) of the sample from Example 1 measured by pyrolysis gas chromatography. Figure 8 is a spectral diagram showing the results (m/z value: 133) of the sample from Comparative Example 1 measured by pyrolysis gas chromatography.

As shown in Figure 6, when glycol-modified lignin was measured, the spectrum at an m/z value of 133 had fewer peaks compared to the spectrum of the sum of measurements at all m/z values (Figure 2). Four peaks (indicated by black inverted triangles "▼") at 18, 20.5, 22.5, and 24 minutes were more clearly observed. The locations of these peaks corresponded to the locations of peaks based on polyethylene glycol, the glycol compound used in the production of glycol-modified lignin.

The tendency for a more clearly defined peak based on polyethylene glycol was more pronounced when measuring the sample from Example 1, which consisted of a resin composition containing ABS resin and glycol-modified lignin. Specifically, in the spectrum at an m/z value of 133 (Figure 7), a clear peak was observed at approximately the same position as the four strong peaks observed after 18 minutes in Figure 6 (indicated by black inverted triangles "▼"). The peak intensity ratios corresponded to those in Figure 6. In contrast, in the spectrum of the sum of measurements at all m/z values (Figure 4), a peak was observed at approximately the same position as the strong peak observed in the glycol-modified lignin spectrum (Figure 2) during the period after 21 minutes, when the peaks of the ABS resin component largely disappeared.

On the other hand, the spectrum obtained by measuring the sample of Comparative Example 1, which contained Kraft lignin as a filler instead of glycol-modified lignin, when the m/z value was 133 (Figure 8), did not show four peaks corresponding to the positions of the four strong peaks observed from 18 minutes onward in Figure 6.

Therefore, by measuring pyrolysis gas chromatography on a resin composition containing ABS resin and a filler, or a resin-containing component based on this resin composition, and obtaining a spectrum with an m/z value of 133, it is possible to determine whether or not the filler contained in the resin composition or resin-containing component contains glycol-modified lignin. Specifically, under the measurement conditions used in this study, if four peaks are observed in the obtained spectrum at 18 minutes, 20.5 minutes, 22.5 minutes, and 24 minutes, it can be determined that the filler contained in the resin composition or resin-containing component contains glycol-modified lignin. The accuracy of this determination can also be improved by comparing the intensities of these four peaks.

(Example 2)
A resin composition was obtained by mixing 13.50 kg of ABS resin (PA-757, manufactured by Chi Mei Industrial Co., Ltd.) with 1.50 kg of glycol-modified lignin obtained in Production Example 1 as a filler, and kneading the mixture in a twin-screw extruder. The amount of glycol-modified lignin in this resin composition was 10% by mass.

(Example 3)
A resin composition was obtained by mixing 12.00 kg of ABS resin (PA-757, manufactured by Chi Mei Industrial Co., Ltd.) with 3.00 kg of glycol-modified lignin obtained in Production Example 1 as a filler, and kneading the mixture in a twin-screw extruder. The amount of glycol-modified lignin in this resin composition was 20% by mass.

The resin compositions of Examples 2 and 3 were evaluated in the same manner as the resin composition of Example 1. The results are shown in Table 3. Furthermore, based on Table 3, the percentage (in %) of the results for Examples 2 and 3 relative to the results for Example 1 is shown in Table 4 and Figure 9.

As shown in Tables 3 and 4 and Figure 9, it was confirmed that increasing the amount of glycol-modified lignin reduced the impact strength. On the other hand, other physical properties, including MFR, did not change significantly even when the amount of glycol-modified lignin was increased.

(7) Provisional Oxygen Index Measurement A strip-shaped test piece was prepared using the resin composition manufactured in the Examples, etc., and the oxygen index was measured under the following conditions. Since the test piece did not have the standard shape for oxygen index measurement, the obtained oxygen index was considered a "provisional oxygen index" that was only significant in relative comparison in this test result.
Test method: JIS K7201-2
Test shape: 80 mm x 10 mm x t4 mm, thickness details are as shown in Table 3. Test conditions: Addition procedure; Method A (top surface ignition), oxygen concentration increase/decrease; 1.0%
Conditioning: (23±2)℃・(50±5)%RH × 88h
Test environment: (24-25)°C, (50-54)% RH, 997 hPa
Measurement device: Candle combustion test AC2 type (manufactured by Toyo Seiki Seisakusho Co., Ltd.)
The test results are shown in Table 5.

As shown in Table 5, the results for Example 1 (containing 5% glycol-modified lignin) were not significantly different from those for Reference Example 1 (no lignin) and Comparative Example 1 (containing 5% kraft lignin). However, in Examples 2 (containing 10% glycol-modified lignin) and 3 (containing 20% glycol-modified lignin), a tendency for the oxygen concentration required to maintain combustion to increase was observed. Therefore, it can be said that increasing the amount of glycol-modified lignin makes the material less flammable.

The embodiments described herein are provided to facilitate understanding of this disclosure and are not intended to limit it. Accordingly, each element disclosed in the embodiments above includes all design modifications and equivalents that fall within the technical scope of this disclosure.

Claims (6)

A resin composition comprising ABS resin and glycol-modified lignin, which is lignin modified with polyethylene glycol ,
The melt flow rate is lower than that of a comparison resin composition obtained by changing the glycol-modified lignin in the resin composition to kraft lignin.
A resin composition characterized by the following. The resin composition according to claim 1 , wherein the polyethylene glycol has an average molecular weight of 200 to 600. The resin composition according to claim 1 or claim 2 , wherein fragments derived from the glycol-modified lignin are measured when analyzed by pyrolysis gas chromatography. The resin composition according to any one of claims 1 to 3, wherein the melt flow rate is lower than that of the reference resin composition obtained by removing the glycol-modified lignin from the resin composition. A resin composition according to any one of claims 1 to 4, which does not contain a compatibilizer. A resin-containing member having a resin-containing portion formed from the resin composition according to any one of claims 1 to 5.