JPS599663B2 - Lubricating agent for synthetic fibers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricating agent for synthetic fibers, and particularly to a lubricating agent for synthetic fibers that undergoes a heating process.

Conventionally, when producing synthetic fibers, yarns spun by a melt spinning method are heated to draw them or heat-set to improve their properties.

In addition, in the case of thermoplastic synthetic fibers that undergo a false twisting process, they are generally heat treated to fix their shape, and for synthetic fibers used for industrial materials such as Taiki cord yarn,
It is customary to draw under severe heating conditions to obtain high strength yarns.

In various manufacturing processes, fiber threads are often processed at fairly high speeds, and a high level of lubrication treatment agent is used on the fiber threads for the purpose of smoothing processes such as spinning, drawing, and processing. Heat resistance, smoothness, and antistatic properties are required.

In order to meet these demands, lubricant components that have traditionally been blended with emulsifiers, antistatic agents, etc. have been esters of mineral oils, higher alcohols, and fatty acids, and esters of dibasic acids such as adipic acid and sebacic acid. Fatty acid esters of polyalcohols such as trimethylolpropene glycerin have been used.

However, although these conventionally used lubricating agents exhibit good smoothness, they are not suitable for synthetic fiber yarns that undergo particularly harsh heating processes such as hot drawing and false twisting processes. They do not have sufficient heat resistance, and they emit smoke, which worsens the working environment, and tar-like substances are formed on the heater, causing noticeable dirt in the yarn path, resulting in single yarn wrapping and yarn breakage.

As a result, smooth stretching and false twisting cannot be performed, and the machine must be stopped and cleaned to remove the tar-like substance, causing process troubles and reducing efficiency.

The present inventors have already developed a compound with excellent thermal stability as a composition for lubricating synthetic fibers that undergoes a heating process, which has improved such drawbacks, and has published Japanese Patent Publication No. 47-29474 and Japanese Patent Application Laid-open No. 5 It is disclosed in Japanese Patent No. 1-70397.

The lubricating component used in the composition of the invention is a diester obtained by adding alkylene oxide to bisphenol A and esterifying it with a higher fatty acid, and having the following general formulas (m) and (IV).

(In the formula, R1 and R2 are saturated or unsaturated hydrocarbon groups having 8 to 22 carbon atoms, m and n are 1 or more and the total is 50 or less.) These compounds have very good thermal stability. This method succeeded in improving the above-mentioned drawbacks.

However, with the recent speeding up of textile manufacturing processes,
There is an increasing demand for strengthening environmental protection (for example, the problem of aeration due to smoke generation) in areas where textile manufacturers and textile processing manufacturers are located, and it has become necessary to further improve heat resistance. .

In view of this situation, the inventors of the present invention have conducted repeated studies to suppress the generation of smoke and tar-like substances during the heating process. The present invention was achieved by discovering that the processing agent made by the above treatment emits virtually no smoke and does not form tar-like substances.

[In the general formula CI), R1 is a polyoxyalkylene ether residue of a polyphenyl-type phenol represented by the following general formula CII), R2 is a dibasic acid residue, and A is an oxyalkylene having 2 to 4 carbon atoms and/or a mixed oxyalkylene. Each of the groups n1 and n2 is a number greater than or equal to 1, and the total thereof is less than or equal to 50.

] [In the general formula (n), R3 and R4 are hydrogen atoms and/or methyl groups R5 is an alkylene group having 2 to 4 carbon atoms or a mixed alkylene group R6 is a hydrogen atom or a phenyl group p is 1 to 5, and n3 is 1 [Number between 50 and 50]] The compound of the present invention can be easily produced by a known method, and one example is the bisphenol disclosed in Japanese Patent Publication No. 47-29474 and Japanese Patent Application Laid-Open No. 51-70397. It is obtained by reacting the alkylene oxide adduct of A with a dibasic acid such as maleic anhydride to form a half ester, and then esterifying it with an alkylene oxide adduct of monobenzylphenol.

In the general formula CI) of the present invention, R2 is a dibasic acid residue, and examples of the dibasic acid include maleic acid, succinic acid, anhydrides thereof, adipic acid, azelaic acid, phthalic acid, and Examples include acid anhydrides thereof.

In general formula [I], A is an oxyalkylene group, specifically an oxyethylene group, an oxypropylene group,
It is an oxybutylene group or a mixed oxyalkylene group of Cholera, and n1 and n2 are each a number of 1 or more, and the total is 5.
It is less than or equal to 0.

In general formula CI), n1 and n2 are preferably 1 to 10, and particularly preferably each of n1 and n2 is 1.

In the general formula [■], R1 is an oxyalkylene-added residue of the polyphenyl type phenol shown in the general formula (II), and in the general formula [■], R3 and R4 are hydrogen atoms and/or methyl groups, R, is an alkylene group or a mixed alkylene group having 2 to 4 carbon atoms, specifically an ethylene, propylene, butylene group, or a mixed alkyl group thereof.

Specific examples of the compound represented by the general formula (n) include oxyalkylene adduct residues of mono (or bis, tris, tetrakis, pentakis) pendylphenol or mixed phenols of these phenols; ) An oxyalkylene adduct residue of styrylphenol, an oxyalkylene adduct residue of bis α-methylstyrylphenol, an oxyalkylene adduct residue of mono α-methylstyrylutrisbenzylphenol, etc.

In the general formula CII), n3 is a number from 1 to 50, preferably from 10 to 20, and if it exceeds 50, the heat resistance will decrease and the effects of the present invention will not be fully exerted, so it is not preferable.

The synthetic fiber lubricant treatment agent of the present invention as described above generates little smoke or tar-like substances and has excellent heat resistance, but another feature is that the treatment agent itself has emulsifying properties, In particular, it is capable of forming a good emulsion by itself without adding any other component as an emulsifier.

Even in the conventionally used compounds represented by the above general formulas (III) and (■), if the number of added moles of oxyalkylene is increased, a product with emulsifying properties to some extent can be obtained. As the number increases, the heat resistance decreases, so there is a certain limit to actually maintaining good heat resistance.

Furthermore, when an oxyalkylene group is introduced into a heat-resistant compound, its heat resistance generally decreases.

However, in the compound of the present invention, even if the number of moles of oxyalkylene added in the oxyalkylene adduct of the polyphenyl type phenol represented by the general formula (II) is increased, as long as the number of moles is up to about 50 moles, the general formula The heat resistance of the compound (I) is hardly reduced.

Therefore, depending on the purpose of use, this compound can be made into a processing agent with emulsifying properties by relatively increasing the number of moles of oxyalkylene added, and when used in combination with other emulsifiers, the number of moles of oxyalkylene added can be increased. It is also possible to use a processing agent that focuses on improving heat resistance by reducing the amount.

The synthetic fiber lubricating agent used in the present invention may optionally include a known lubricant (for example, aliphatic monoesters such as lauryl oleate and isotridecyl stearate, dioleyl adipate, etc.) in addition to the compound of general formula [■]. Dibasic acid diesters such as dioctyl phthalate, polyhydric alcohol esters such as trimethylolethane trilaurate and glycerin triolate), polyoxyethylene zorubikune ester, and ethylene oxide adducts of hydrogenated castor oil, etc. An emulsifier, furthermore, an alkyl phosphate potassium salt, potassium oleate, an imitazoline type amphoteric active agent, a betaine type amphoteric active agent, etc. can be mixed and used as an antistatic agent.

Therefore, the lubricating treatment composition of the present invention can be emulsified in water to form an aqueous emulsion by a conventional method, or dissolved in a low-viscosity diluting solvent, and applied to fiber yarns by an oiling roller method, a spray method, etc. to 2.0% by weight of oil.

The synthetic silk treated with the lubricating treatment composition of the present invention exhibits extremely excellent heat resistance, and when placed on a heater plate heated to 160 to 250°C, it produces smoke and deteriorates the working environment. It does not generate tar-like substances that reduce work efficiency.

Examples below will explain the effects of the present invention with examples.
1 Table 2 shows the results of a cross-sectional examination of the heat resistance of the compounds A, B, and C of the present invention shown in Table 1 and conventionally used known lubricant components.

From Table 2, the compounds of the present invention exhibit very excellent heat resistance,
It can be seen that there is almost no smoke or formation of tar-like substances.

Incidentally, the amount of smoke generation and the rate of tar formation were measured as follows, and the smaller the number, the better the results.

The light attenuation rate when no smoke is emitted is 0. (Amount of smoke produced) When a sample is placed in a metal container for 0.1y' and heated to 250℃, the smoke generated by the sample is introduced into a spectrometer, and the smoke emission is calculated by integrating the light attenuation rate over 5 minutes. Quantity.

The light attenuation rate is 0 when no smoke is emitted.

(Method for Measuring Tar Ratio) A sample of about 0.52 mm was collected in a commercially available aluminum dish, placed in a hot air dryer, heated at 250°C for 4 hours, and then taken out.

After cooling to room temperature, wash the aluminum dish with acetone.

Generally, the remaining sample that does not dissolve in acetone is a black resinous substance, and the larger the amount, the higher the rate of taring.

The tar conversion rate was calculated using the following formula.

Example 2 Table 4 shows the results of comparing the heat resistance of compounds D, E, F, and G of the present invention listed in Table 3 with conventionally used known lubricant components.

It can be seen from Table 4 that Compounds D and E of the present invention exhibit extremely excellent heat resistance.

Incidentally, the amount of smoke generated and the rate of tarring were measured using the same method as in Example 1.

Claims (1)

[Scope of Claims] 1. A lubricating agent for synthetic fibers, characterized by containing a compound represented by the following general formula CI) as an active ingredient. In [the above general formula (I)], R1 is the following general formula Cm
), R2 is a dibasic acid residue, A is an oxyalkylene group having 2 to 4 carbon atoms, and/or a mixed oxyalkylene group thereof. The total number is less than 50. ] [In the above general formula [■], R5 and R4 are hydrogen atoms and/or methyl groups R5 is an alkylene group having 2 to 4 carbon atoms and/or a mixed alkylene group thereof p is 1 to 5, and n3 is 1 to 5. The number R6 of 50 is a hydrogen atom or a phenyl group]. 2 In the general formula [■], n1 and n2 are 1 to 10
A lubricating agent for synthetic fibers according to claim 1. 3. The lubricating agent for synthetic fibers according to claim 1, wherein n1 and n2 are 1 in general formula CI). 4. The lubricant for synthetic fibers according to claim 1, wherein n3 in the general formula [■] is 10 to 20. 5 General formula CI) and general formula [III, A in l
The lubricating treatment for synthetic fibers according to claim 1, wherein R is an oxyethylene group and R is an ethylene group.