JP3135784B2 - Resin composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a resin composition. More specifically, the present invention relates to a resin composition having excellent moldability and high permanent antistatic properties and excellent mechanical strength.

[0002]

2. Description of the Related Art Conventionally, polyetheresteramides have excellent antistatic properties as antistatic agents for thermoplastic resins, but polystyrene, polymethyl methacrylate,
Styrene / acrylonitrile copolymer (SAN resin),
Acrylonitrile / butadiene / styrene copolymer (A
BS resin), poor compatibility with vinyl polymers such as methyl methacrylate / butadiene / styrene copolymer (MBS resin) and styrene / methyl methacrylate / acrylonitrile copolymer, and mixing with these ordinary thermoplastic resins. Even if it did, delamination occurred or the impact strength was poor, and a resin composition having desirable mechanical properties could not be obtained. Therefore, it has permanent antistatic properties,
As a method for obtaining an antistatic resin having excellent mechanical properties, there is known a method for obtaining a polyetheresteramide by mixing a modified vinyl polymer having a carboxyl group (Japanese Patent Publication No. 4-72855). Although the mechanical strength of this composition is improved, the moldability is poor due to the self-crosslinking reaction of the carboxyl group. Also, a method is known which is obtained by mixing a rubber-modified styrene-based thermoplastic resin having a vinyl monomer having a hydroxyl group as a copolymer component (Japanese Patent Application Laid-Open No. 2-70739). Although has excellent mechanical properties, the antistatic property is lower than that obtained by kneading only polyetheresteramide and two other thermoplastic resins. In addition, there is a disadvantage that sufficient moldability cannot be obtained.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has a resin composition having excellent moldability, high permanent antistatic properties and excellent mechanical strength. The purpose is to provide things.

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that a block polymer having a polyolefin portion having a specific molecular weight and a specific polymerization form and an aromatic vinyl polymer portion and / or Alternatively, if a vinyl polymer having a specific sulfonic acid (salt) group is used as a compatibilizer between polyetheresteramide and another thermoplastic resin, only permanent antistatic properties can be imparted. In addition, the compatibility of the vinyl polymer and the aromatic polymer portion having a specific sulfonic acid (salt) group improves the compatibility and the mechanical strength is excellent, and the flowability of the resin is improved by the effect of the specific polyolefin polymer portion. As a result, the resin composition obtained has a high level of permanent antistatic properties as a result of using a vinyl polymer having a sulfonic acid (salt) group as a component. Found Rukoto, it has been reached with the present invention.

That is, the present invention provides the following (A), (B),
(C) and (D), (A), (B), (C)
And the weight ratio of (D) is (40-1): (0-40):
(0 to 40): a resin composition of (50 to 95) [however, (B) and (C) do not become 0 at the same time]. (A): Polyetheresteramide (B): Vinyl polymer having a sulfonic acid (salt) group (C): Block polymer having a polyolefin portion (a1) and an aromatic vinyl polymer portion (b1) ( D): (co) polymer having at least one selected from the group consisting of styrene, methyl methacrylate, acrylonitrile and butadiene as a constituent unit

In the present invention, examples of the polyetheresteramide (A) include the polyetheresteramides described in Japanese Patent Application No. 5-113715 and Japanese Patent Publication No. 4-5691. Of these, polyamides having a number average molecular weight of 500 to 5,000 having carboxyl groups at both ends and a number average molecular weight of 5
It is a polyetheresteramide derived from an alkylene oxide adduct of a polyoxyalkylene glycol and / or a bisphenol of from 0.00 to 5,000.

The relative viscosity of (A) is not particularly limited, but is preferably 0.5 to 4.0 (0.5% by weight m-cresol solution at 25 ° C.), particularly preferably 0.6 to 3.0. It is. If the relative viscosity is less than 0.5, heat resistance is poor, and if it exceeds 4.0, moldability is reduced.

Among the structural units of the vinyl polymer (B) having a sulfonic acid (salt) group, in the compound represented by the general formula (1), R ₂ represents an alkyl group or an alkenyl group (allyl, methallyl, Hydrocarbon groups such as oleyl group), cycloalkyl group, aryl group, alkylaryl group, and aralkyl group; hydrocarbons to which groups such as hydroxyl group, halogen, carboxyl group, nitrile group, amide group, and amino group are bonded. Groups: oxyalkylene compound residues obtained by adding an alkylene oxide to a compound having active hydrogen such as alcohols, phenols, carboxylic acids, and amines. Of these, preferred are alkyl groups having 11 to 15 carbon atoms. A includes an ethylene group, a propylene group and a butylene group, and a preferable one is an ethylene group. Examples of M include alkali metals such as sodium, potassium and lithium, alkaline earth metals such as calcium and magnesium, and amines such as ammonia, ethanolamine, diethylethanolamine, monomethylamine and trimethylamine. Preferred among these are sodium, potassium and ammonia. The monomer having a sulfonate and the cation component exemplified above may be used as a mixture of two or more kinds. n is preferably 0 to 10.

Among the compounds represented by the general formula (1), preferred are compounds represented by the following general formula (2). (In the formula, R represents an organic group having a hydrocarbon group or an oxyalkylene group having 8 to 18 carbon atoms, and k represents an integer of 0 to 3.) As specific examples of the compound represented by the general formula (2), , R is a dodecyl group and k is 0 (trade name: Eleminol J
S-2, manufactured by Sanyo Chemical Industry Co., Ltd.).

The aromatic hydrocarbon vinylsulfonic acid (salt) includes p- and o-styrenesulfonic acid (salt), styrenedisulfonic acid (salt), α-methylstyrenesulfonic acid (salt), vinylphenylmethanesulfonic acid (Salts) and the like.

The (meth) acrylamide having a sulfonic acid (salt) includes 2- (meth) acrylamide-2-
Methylpropanesulfonic acid (salt), 3- (meth) acrylamidopropane-1-sulfonic acid (salt), 2- (meth) acrylamidoethyl-1-sulfonic acid (salt), 3
(Meth) acrylamide having a sulfonic acid (salt) such as-(meth) acrylamide-2-hydroxypropanesulfonic acid (salt) and p- (meth) acrylamidomethylbenzenesulfonic acid (salt).

Examples of the (meth) acrylate having a sulfonic acid (salt) include 3- (meth) acryloyloxypropane-1-sulfonic acid (salt) and 4- (meth) acryloyloxybutane-1-sulfonic acid ( Salt), 4- (meth) acryloyloxybutane-2-sulfonic acid (salt), 2- (meth) acryloyloxyethyl-1-sulfonic acid (salt),
3- (meth) acryloyloxy-2-hydroxypropanesulfonic acid (salt) and the like.

Examples of the aliphatic hydrocarbon vinyl sulfonic acid (salt) include vinyl sulfonic acid (salt) and (meth) allyl sulfonic acid (salt).

Of these, aromatic hydrocarbon vinyl sulfonic acids (salts) are preferred, and p- and o-styrene sulfonic acids (salts) are particularly preferred. Examples of the salts of these sulfonic acids include alkali metal salts such as sodium salts, potassium salts and lithium salts, alkaline earth metal salts such as calcium salts and magnesium salts, and ammonium salts.
Of these, sodium, potassium and ammonium salts are preferred.

(B) is usually obtained by copolymerization of the above monomer having a sulfonic acid (salt) group with another vinyl monomer. The other vinyl monomers are not particularly limited. For example, aromatic vinyl monomers such as styrene, vinyl cyanide monomers such as acrylonitrile, and (meth) acrylate ester monomers such as methyl methacrylate. Mers,
One or more of α, β-unsaturated carboxylic acid (anhydride) monomers such as (meth) acrylic acid, maleimide monomers, olefin monomers and vinyl monomers such as vinyl chloride. It can be selected and used together. Among these, preferred are aromatic vinyl monomers such as styrene,
Vinyl cyanide monomers such as acrylonitrile; and (meth) acrylate monomers such as methyl methacrylate.

The polymerization method of (B) is not particularly limited, but a bulk polymerization method, a solution polymerization method and a bulk polymerization method in the presence of a known polymerization initiator.
Examples include a suspension polymerization method and an emulsion polymerization method.

In addition to the method of obtaining a vinyl polymer having a sulfonic acid (salt) group by the above polymerization method, a method of directly sulfonating a styrene polymer with a sulfonating agent such as sulfuric acid or chlorosulfonic acid. The vinyl polymer having a sulfonic acid (salt) group obtained by the above method may be used.

When one molecule of the sulfonic acid (salt) group-containing vinyl polymer has substantially one or more sulfonic acid (salt) groups on average in one molecule, the antistatic property is maintained and the impact resistance is improved. And the compatibility of both components (A) and (D) can be improved.

The number average molecular weight of the vinyl polymer (B) having a sulfonic acid (salt) group is not particularly limited, but is usually 1,000 to 200,000, preferably 5,000 to 200.
100,000.

A block polymer (C) having a polyolefin portion (a1) and an aromatic vinyl polymer portion (b1)
Are, for example, a polyolefin moiety (a1) modified with an α, β-unsaturated carboxylic acid (anhydride) (a2) and an aromatic vinyl polymer having at least one terminal having a group reactive with an acid anhydride. It is obtained by reacting with the coalescing part (b2).

The polyolefin portion (a1) includes high-density polyethylene, medium-density polyethylene, low-density polyethylene, propylene polymer, polybutene, poly-4-methylpentene-1, a copolymer of ethylene and α-olefin, polyolefins such as α-olefin copolymers or oligomers thereof; ethylene-propylene rubber, ethylene-propylene-diene copolymer rubber, ethylene-vinyl acetate copolymer, butyl rubber, Polyolefin elastomers such as low crystalline ethylene-propylene copolymer, propylene-butene copolymer, ethylene-vinyl ester copolymer, ethylene-acryl ester copolymer, blend of polypropylene and ethylene-propylene rubber; and And mixtures of two or more of the above. Of these, preferred are propylene polymers, copolymers of propylene and α-olefins, low-density polyethylenes and oligomers thereof, and particularly preferred are oligomers of copolymers of propylene and α-olefins.

Oligomers of a copolymer of propylene and an α-olefin can be obtained by a polymerization method or a thermal degradation method of a high molecular weight polyolefin. Preferred from the viewpoint of easiness of modification with maleic anhydride or its derivatives are those obtained by a thermal degradation method. The polyolefin obtained by the thermal degradation method is, for example, a polyolefin having a molecular weight of 50,000 to 150,000 in an inert gas, usually 300 ° C to 450 ° C.
(For example, a method described in JP-A-3-62804). The number average molecular weight of the oligomers is usually 500 to
It is 50,000, preferably 1,000 to 20,000.

(A2) is, for example, modifying the polyolefin portion (a1) with an α, β-unsaturated carboxylic acid (anhydride) in the presence of an organic peroxide, if necessary, by a melting method or a solution method. Can be obtained.

Examples of the α, β-unsaturated carboxylic acid (anhydride) which modifies (a1) include maleic anhydride and the like.
And the compounds described in JP-A-36248. The amount of the α, β-unsaturated carboxylic acid (anhydride) used for the modification is usually 1 to 25% by weight, preferably 3 to 20% by weight based on the weight of (a2).

As the aromatic vinyl polymer portion (b1), a polymer or a copolymer of an aromatic vinyl compound or another vinyl compound copolymerizable therewith can be used.
Examples of the aromatic vinyl compound include styrene, α
-Methylstyrene, dimethylstyrene, t-butylstyrene, vinyltoluene, chlorovinyltoluene, acetoxystyrene, hydroxystyrene and the like. Examples of other copolymerizable vinyl compounds include (meth) acrylic acid, (meth) acrylate, (meth) acrylonitrile, and the like. Of these, preferred are a styrene polymer and a copolymer of styrene and acrylonitrile.

The number average molecular weight of the aromatic vinyl polymer portion (b1) is not particularly limited, but is usually from 1,000 to 6
0,000, preferably 1,000 to 20,000.

(B2) can be obtained by introducing an epoxy group, a hydroxyl group, an amino group or the like into (b1). These groups may be introduced into the molecule of the polymer and / or at the terminal. A polymer having these groups introduced at least at one end is preferred.

As a method of introducing these groups into (b1), there is a method of polymerizing an aromatic vinyl monomer in the presence of a chain transfer agent corresponding to the group to be introduced.
As this chain transfer agent, a mercaptan compound can be used. For example, when the group to be introduced is a hydroxyl group, thioglycerin, mercaptoethanol and the like can be used, and when the group to be introduced is an amino group, 2-aminoethanethiol and the like can be used. Examples of the polymerization method include a solution polymerization method, a suspension polymerization method, and an emulsion polymerization method in the presence of a known radical polymerization initiator, and a solution polymerization method is preferable.

The reaction method for obtaining (C) generally includes (a2)
And (b2) are reacted at a reduced pressure of 150 ° C. to 250 ° C. under reduced pressure.

Specific examples of the (co) polymer (D) having at least one member selected from the group consisting of styrene, methyl methacrylate, acrylonitrile and butadiene as a constituent unit include polystyrene Styrene / acrylonitrile copolymer, styrene / methyl methacrylate copolymer, styrene / butadiene copolymer, acrylonitrile / butadiene / styrene copolymer, methyl methacrylate / butadiene / styrene copolymer, styrene / methyl methacrylate / Acrylonitrile copolymer and the like.

The resin composition of the present invention may contain other thermoplastic polymers such as polyamide, polyester (polyethylene terephthalate, polybutylene terephthalate, etc.), polycarbonate, polyphenylene ether, polyolefin (polyethylene, etc.) as long as the object of the present invention is not impaired.
It is also possible to use an elastomer such as polypropylene) or a hydrogenated styrene-butadiene block copolymer.

In the present invention, (A) in the resin composition,
The weight ratio of (B), (C) and (D) is (40-1):
(0-40): (0-40): (50-95) [However, (B) and (C) do not become 0 at the same time]. The weight ratio of (A) is preferably 5 to 30. (A)
If the weight ratio is less than 1, the antistatic properties are insufficient, and
If it exceeds, the mechanical strength decreases. (B) and (C)
Is preferably 1 to 15 in total. If the weight ratio of (B) or (C) exceeds 40, the resin properties deteriorate.
The weight ratio of (D) is preferably from 60 to 90.

For the purpose of further improving the antistatic effect, a metal salt (E) comprising a halide of an alkali metal and / or an alkaline earth metal may be contained. Examples of (E) include lithium chloride, sodium chloride, potassium chloride, magnesium chloride, calcium chloride, sodium bromide, potassium bromide, and magnesium bromide. Preferred among these are sodium chloride and potassium chloride.

The amount of (E) used is (A), (B),
Usually 0.01 to the total weight of (C) and (D)
It is 5% by weight, preferably 0.05-3% by weight.
When the amount of (E) is less than 0.01% by weight, no effect is exhibited,
If it exceeds 5% by weight, it precipitates on the resin surface and impairs the appearance of the resin. There is no particular limitation on the method of adding (E), but it is desirable to disperse it in the polyetheresteramide (A) in advance from the viewpoint of easy dispersion in the composition. When (E) is dispersed in (A),
It is desirable to add (E) and disperse (E) in advance during the polymerization of (A).

The resin composition of the present invention may contain a nonionic, anionic, cationic or amphoteric surfactant to further improve the antistatic property. Of these, preferred are anionic surfactants, and particularly preferred are sulfonates such as alkylbenzene sulfonates, alkyl sulfonates, and paraffin sulfonates.

The resin composition of the present invention can be obtained by kneading the above components using various known mixers. Examples of the mixer include an extruder, a Brabender, a kneader, and a Banbury mixer.

The order of addition of each component at the time of kneading is not particularly limited. For example, a method of blending and kneading (A) to (D), a method of blending and kneading a small amount of (D) with (A) to (C) After that, there is a method of kneading the remaining (D) and a method of kneading (D) after blending and kneading (A) to (C). Is a method called star batch or master pellet. A method is preferred because it has good dispersibility, and is excellent in permanent antistatic properties and mechanical strength.

As a method for obtaining the composition of the present invention via a masterbatch, (A) 20 to 80 parts by weight,
(B) 0 to 60 parts by weight, (C) 0 to 60 parts by weight and (D) 0 to 60 parts by weight, preferably (A) 20 to 80 parts by weight, (B) 0 to 25 parts by weight, (C) 0 to 25 parts by weight and (D) 5 to 40 parts by weight (provided that (B) and (C) do not become 0 at the same time) are blended and kneaded to form a masterbatch. ) Is blended and kneaded. In particular, since the method can uniformly disperse a small amount of (A) to (C) in a large amount of (D), it is preferable that the composition of the present invention is formed via a masterbatch.

Further, other resin additives can be optionally added to the resin composition of the present invention according to various uses as long as the properties of the composition are not impaired. Examples of the additives include pigments, dyes, fillers, nucleating agents, glass fibers, lubricants, plasticizers, release agents, antioxidants, flame retardants, ultraviolet absorbers and the like.

[0040]

EXAMPLES The present invention will be further described with reference to the following examples, but the present invention is not limited to these examples. Parts in Examples are parts by weight. In addition, after the resin composition finally obtained was molded by an injection molding method, various physical properties were measured by the following test methods. Surface resistivity: 20 ° C., 65% humidity using a 2 mm-thick square test piece measured by a super insulation tester (Advantest)
It was measured under an RH atmosphere. Izod impact strength: ASTM D256 Tensile strength: ASTM D638 M F R: ASTM D1238 (temperature 22
(Measured under the conditions of 0 ° C. and a load of 10 kg) Compatibility: Evaluated by bending the injection molded product and observing the fracture surface. (Evaluation criteria) ；: good ×: many laminar peelings were observed, and the compatibility was poor.

[Production of Polyetheresteramide] Production Example 1 105 parts of ε-caprolactam, 17.1 parts of adipic acid, and Irganox 1 were placed in a 3 L stainless steel autoclave.
010 (Antioxidant; Ciba-Gaiky) 0.3 parts and water 6 parts were charged, and after purging with nitrogen, the mixture was heated and stirred for 4 hours at 220 ° C. under pressure and airtight, and a polyamide having an acid value of 110 having a carboxyl group at both ends. 117 parts of the oligomer were obtained. Next, 175 parts of polyoxyethylene glycol having a number average molecular weight of 1,500 and 0.5 parts of zirconyl acetate were added, and 24
Polymerization was performed at 5 ° C. under reduced pressure of 1 mmHg or less for 5 hours,
A viscous polymer was obtained. The polymer was taken out in a strand form on a belt and pelletized to obtain a polyetheresteramide. The solution viscosity of this was η _SP /C=2.20 (m-cresol, 25 ° C., C =
0.5% by weight). This polyetheresteramide is abbreviated as [A-1] below.

Production Example 2 105 parts of ε-caprolactam, 17.1 parts of adipic acid, and Irganox 1 were placed in a 3 L stainless steel autoclave.
010 (antioxidant; manufactured by Ciba-Gaiky) 0.3 part,
Charge 2 parts of potassium chloride and 7 parts of water, replace with nitrogen,
The mixture was heated and stirred at 220 ° C. for 4 hours while being sealed under pressure to obtain 117 parts of a polyamide oligomer having an acid value of 100 and having carboxyl groups at both ends. Next, the same operation as in Production Example 1 was carried out except that 225 parts of a bisphenol A ethylene oxide adduct having a number average molecular weight of 2,000 was added instead of 175 parts of polyoxyethylene glycol having a number average molecular weight of 1,500. A composition of the invention polyetheresteramide and potassium chloride was obtained. The composition of polyetheresteramide and potassium chloride by fluorescent X-ray analysis was as follows. Polyetheresteramide 99.4% by weight Potassium chloride 0.6% by weight The solution viscosity of this was η _SP /C=2.15 (m-cresol, 25 ° C., C = 0.5% by weight). This polyetheresteramide is abbreviated as [A-2] below.

[Production of vinyl polymer having sulfonic acid (salt) group] Production Example 3 68 parts of methyl methacrylate, 23 parts of styrene, 4 parts of acrylonitrile, 5 parts of a compound having a sulfonic acid group represented by the following general formula (Trade name: Eleminor JS-2, manufactured by Sanyo Chemical Industries, Ltd.) was subjected to suspension polymerization to obtain a vinyl polymer having a sulfonic acid group. This vinyl polymer having a sulfonic acid group is abbreviated as [B-1] below.

Production Example 4 A flask equipped with a stirrer, a reflux condenser, three dropping funnels, a thermometer and a nitrogen gas inlet was charged with 235 parts of DMF. 17 parts of acrylonitrile and 77.5 parts of styrene were charged into the dropping funnel 1, and 5.5 parts of sodium styrenesulfonate and 67 parts of DMF were charged into the dropping funnel 2. A dropping funnel 3 was charged with 1 part of azobisisobutyronitrile and 6 parts of DMF. The liquid temperature in the flask was set to 80 ° C., and the contents were dropped from dropping funnels 1 to 3 over 2 hours while maintaining the liquid temperature at 80 ° C. in a nitrogen stream. After dropping all the contents, the temperature was kept at 80 ° C. for another 5 hours. The solvent and unreacted monomers are distilled off to remove the styrene-
An acrylonitrile-sodium styrenesulfonate copolymer was obtained. The content of sodium styrene sulfonate in this copolymer was 5%, the number average molecular weight was 36,000, and the softening point measured by a ring and ball method was 180 ° C. This vinyl copolymer having a sulfonic acid group is abbreviated as [B-2] below.

[Production of Block Polymer Having Polyolefin Portion and Aromatic Vinyl Polymer] Production Example 5 1. 95 parts of low molecular weight polypropylene having a number average molecular weight of 5,000 and a density of 0.92 obtained by thermal degradation and 5 parts of maleic anhydride were melted at 180 ° C. under nitrogen, and then dicumyl peroxide 1.5 was added. Xylene melted part
A 0% solution was added dropwise over 15 minutes. After the reaction was carried out for 1 hour, the solvent was distilled off to obtain an acid-modified low molecular weight polypropylene. This had an acid value of 25.4 and a number average molecular weight of 7,000. This modified product is abbreviated as (c1) below.

2. 95 parts of styrene monomer in xylene 1
The mixture was dissolved in 00 parts under nitrogen at 80 ° C., and a solution of 5 parts of thioglycerin and 1 part of azobisisobutyronitrile in 30 parts of xylene was added dropwise over 150 minutes.
After the reaction was carried out for 1 hour, the solvent and unreacted monomers were distilled off to obtain a styrene polymer having a hydroxyl group. This had a hydroxyl value of 25.2 and a number average molecular weight of 4,500. This modified product is abbreviated as (c2) below.

3. 50 parts of (c1) and 50 parts of (c2) were melt-kneaded with a vented twin-screw extruder under the conditions of 200 ° C., 30 rpm, and a residence time of 5 minutes to obtain a target polypropylene-block-polystyrene. Hereinafter, it is abbreviated as [C-1].

Production Example 6 After blending the components (A) to (D) at the ratios shown in Table 1 for 3 minutes using a Henschel mixer, the mixture was subjected to a twin-screw extruder equipped with a vent at 240 ° C., 30 rpm, and a residence time of 5 minutes. To obtain masterbatches (M-1) to (M-5).

[0049]

[Table 1] [D-1]: ABS resin (JSR-ABS 10 manufactured by Nippon Synthetic Rubber Co., Ltd.)

Examples 1 to 5 Masterbatches (M-1) to (M-5), A shown in Table 2
The BS resin (D) was blended and kneaded under the same conditions as in Production Example 6 to obtain a composition of the present invention. Table 2 shows the composition and ratio of the composition of the present invention via the masterbatch.

[0051]

[Table 2] [E-1]: Potassium chloride (added during production of polyetheresteramide) * 1): Ratio of metal salt (E) to total weight (%) of (A) to (D)

Examples 6 to 12 and Comparative Examples 1 to 2 (A) to (E) shown in Table 3 were blended and kneaded under the same conditions as in Production Example 6 to obtain a composition of the present invention and a comparative composition. Was.

[0053]

[Table 3] * 1): The ratio of the metal salt (E) is the ratio to the total weight (%) of (A) to (D).

Performance Test The compositions of the present invention of Examples 1 to 12 and the comparative compositions of Comparative Examples 1 and 2 were subjected to an injection molding machine at a cylinder temperature of 2
A test piece was prepared by molding at 20 ° C. and a mold temperature of 60 ° C., and the resin properties and antistatic properties were evaluated. Table 4 shows the results. The antistatic property was evaluated by subjecting the test piece to the treatment and conditioning described below and measuring the surface specific resistance. (A) After molding, each test piece is kept at 20 ° C. and humidity is 65%
Leave for 24 hours under RH atmosphere. (B) After molding, the square test piece is washed with an aqueous solution of a detergent [Mama Lemon; manufactured by Lion Co., Ltd.], and then sufficiently washed with ion-exchanged water.
Leave for 24 hours in an atmosphere of 65 ° C. and 65% RH.

[0055]

[Table 4]

[0056]

The resin composition of the present invention has excellent moldability which could not be achieved by the prior art, and has excellent permanent antistatic properties and mechanical strength. Due to the above effects, the resin composition of the present invention can be suitably used as a molding material requiring various antistatic properties such as housing products for home appliances and OA equipment, various plastic containers, and various automobile parts. .

──────────────────────────────────────────────────続 き Continued on the front page Examiner Soichi Yushina (56) References JP-A-4-252256 (JP, A) JP-A-3-24149 (JP, A) JP-A 5-93118 (JP, A) JP-A-5-230301 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C08L 25/00-25/18 C08L 33/00-33/26 C08L 53/00-53 / 02 C08L 55/00-55/04 C08L 77/12

Claims (5)

(57) [Claims] 1. The following (A), (B), (C) and (D)
And the weight ratio of (A), (B), (C) and (D) is (40-1) :( 0-40) :( 0-40) :( 5
0 to 95) [provided that (B) and (C)
Cannot be 0 at the same time.] (A): polyetheresteramide (B): vinyl polymer having a sulfonic acid (salt) group (excluding styrene sulfonic acid (salt), α-styrene sulfonic acid (salt) and these polymers) C): a polyolefin moiety (a polymer of a conjugated diene selected from 1,3-polybutadiene, isoprene, 2,3-dimethylbutadiene, piperylene and chloroprene)
In addition, hydrogenated diene polymers are excluded. ) A block polymer having (a1) and an aromatic vinyl polymer portion (b1) (D): at least one selected from the group consisting of styrene, methyl methacrylate, acrylonitrile and butadiene (co) Polymers (excluding methacrylic resins having 70% by weight or more of methyl methacrylate units) (B) is a compound represented by the following general formula (1) as a structural unit, (meth) acrylamide having an aromatic hydrocarbon vinyl sulfonic acid (salt), sulfonic acid (salt), sulfonic acid ( 2. A polymer having at least one selected from (meth) acrylate having a salt) and an aliphatic hydrocarbon vinyl sulfonic acid (salt).
The resin composition as described in the above. General formula (Wherein, R ₁ is hydrogen or a methyl group, and R ₂ is C 1-2
4, an organic group containing a hydrocarbon group or an oxyalkylene group, A represents an alkylene group having 2 to 4 carbon atoms, M represents an alkali metal, an alkaline earth metal, ammonium, an organic amine salt or a quaternary ammonium salt; Represents an integer of 0 to 50, and m represents a valence or ionic valence of M. ) 3. The method according to claim 1, wherein (C) has a number average molecular weight of 2,000 to 3
The resin composition according to claim 1 or 2, which is 000 polypropylene-block-polystyrene. 4. A low-molecular-weight polystyrene having a number-average molecular weight of 1,000 to 20,000 having a terminal hydroxyl group or an amino group, and a number-average molecular weight of 1,000 to 20,000 modified with maleic anhydride. The resin composition according to any one of claims 1 to 3, which is a polypropylene-block-polystyrene derived from 000 low molecular weight polypropylene. 5. The method according to claim 1, wherein the composition is passed through a master batch comprising (A), (B), (C) and a small amount of (D) or (A), (B) and (C). The resin composition according to any one of the above.