JPH07111029B2 - Oil agent for synthetic fiber processing - Google Patents

Description

TECHNICAL FIELD The present invention relates to an oil agent for treating synthetic fibers, particularly to an oil agent for treating synthetic fibers which undergoes a severe heat treatment step.

[Conventional technology and problems] When manufacturing synthetic fibers such as polyester and polyamide fibers, in order to draw the yarn spun by the melt spinning method, heating under a high load and optimization of the fiber properties are performed. It is heat-fixed for the purpose. In particular, during the production of rubber reinforcing fibers such as tire cords, seat belt raw yarns and rope raw yarns, the drawing is performed under more severe load and temperature conditions. Further, in recent years, the fiber yarn has been processed at a considerably high speed for the purpose of streamlining the process and improving the productivity, so that the production conditions of the fiber yarn are becoming more and more severe.
Under such severe conditions, the frictional force between the yarn and various contact bodies increases, the fiber yarn is damaged, and fluff and yarn breakage occur, which not only lowers production efficiency but also deteriorates fiber physical properties. It will come. In addition, the treatment agent is thermally decomposed and thermally polymerized to emit smoke when subjected to a harsh heating process, which deteriorates the work environment and causes tar-like substances to form on the heater, resulting in conspicuous stains on the yarn path. Sticking or thread breakage occurs. As a result, smooth drawing and false twisting cannot be performed, and the operation of the machine must be stopped and the tar-like substance must be removed by cleaning to cause troubles in the process and reduce efficiency.

In order to satisfy these requirements, conventionally, esters of mineral oil, higher alcohols and fatty acids, esters of dibasic acids such as adipic acid and sebacic acid, neopentyl glycol, 1,6-hexanediol, etc. The esters of dihydric alcohols and higher fatty acids, and fatty acid esters of polyhydric alcohols such as trimethylolpropane and glycerin have been used as lubricants having relatively good heat resistance, but they are not always satisfactory. As a composition for lubricating a synthetic fiber which has undergone such a heating step, alkylene oxide is added to bisphenol A which has been already disclosed in JP-B-47-29474 and JP-A-51-70397. A treatment agent containing a diester esterified with a fatty acid has been proposed, but this diester has a very high heat resistance but a high viscosity, and is not always satisfactory in terms of lubricating properties.

[Means for Solving Problems] Therefore, the present inventors have arrived at the present invention as a result of extensive studies to solve the above problems.

That is, the present invention is an ester obtained by reacting a compound represented by the following general formula (1) with a compound having one or more carboxyl groups and / or a compound represented by the following general formula (2) and one or more hydroxyl groups. The present invention provides an oil agent for treating synthetic fibers, which comprises an ester obtained by reacting the compound with the compound.

(In the formula, R ₁ , R ₂ , R ₃ and R ₄ each independently have 6 to 30 carbon atoms.
Represents an alkyl or alkenyl group, wherein AO is an alkylene oxide group in which A is an alkylene group having 2 to 4 carbon atoms,
n represents an integer of 0 to 30. The compound represented by the general formula (1) is a branched alcohol obtained by a so-called Guerbet reaction or a compound in which an alkylene oxide having 2 to 4 carbon atoms is added to the branched alcohol, if necessary. The compound having one or more carboxyl groups reacted with the compound represented by the general formula (1) means octanoic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid, eicoic acid, behenic acid, oleic acid, isostearine. Monovalent carboxyl group-containing compounds such as acid, isoeicoic acid and benzoic acid: Divalent carboxyl group-containing compounds such as maleic acid, succinic acid, adipic acid, azelaic acid, phthalic acid and their acid anhydrides: trimellitic acid And trivalent carboxyl group-containing compounds such as acid anhydrides thereof. When a compound having two or more carboxyl groups is used among the above compounds, a conventionally known hydroxyl group-containing compound or the like may be reacted with these compounds to form a partial ester compound, if necessary. .

The compound represented by the general formula (2) is a branched fatty acid obtained by oxidizing a branched alcohol obtained by a so-called Guerbet reaction. The compound having one or more hydroxyl groups reacted with the compound represented by the general formula (2) means 2-ethylhexyl alcohol, octanol, nonanol, decanol, lauryl alcohol, dodecyl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol,
Monovalent hydroxyl group-containing compounds such as eicosanol, behenyl alcohol, oleyl alcohol, isostearyl alcohol, and isoeicosanol: 2 such as ethylene glycol, propylene glycol, trimethylene glycol, butanediol, hexanediol, diethylene glycol, neopentyl glycol and butenediol Compounds containing valent hydroxyl group: Compounds containing valent hydroxyl group such as glycerin, trimethylolethane and trimethylolpropane: Compounds containing valent hydroxyl group such as pentaerythritol and the like. If necessary, an alkylene oxide having 2 to 4 carbon atoms may be added to the compound having one or more hydroxyl groups. Further, when a compound having two or more hydroxyl groups is used, if necessary, a conventionally known fatty acid or the like may be reacted with these compounds to partially use an esterified product thereof.

The ester reaction is carried out by a known method, for example, a heating dehydration reaction in the presence of an alkali or acid catalyst. Esterification is preferably complete esterification from the viewpoint of lubricity.

The synthetic fiber treating oil agent of the present invention is an ester obtained by reacting the compound represented by the general formula (1) with a compound having one or more carboxyl groups and / or the compound represented by the general formula (2) and a hydroxyl group. In addition to the ester obtained by reacting with a compound having 1 or more of the following, if necessary, a conventionally known lubricant (for example, an aliphatic monoester such as lauryl oleate or isotridecyl stearate,
Dibasic acid diesters such as dioleyl adipate and dioctyl phthalate, polyhydric alcohol esters such as trimethylolethane trilaurate and glycerin trioleate), polyoxyethylene sorbitan esters, emulsifiers such as ethylene oxide adducts of hydrogenated castor oil, Further, potassium phosphate salts, potassium oleate, imidazoline-type amphoteric activators, betaine-type amphoteric activators and the like can be blended and used as antistatic agents.

Thus, the synthetic fiber treatment oil agent of the present invention is emulsified in water by a conventional method to form an aqueous emulsion, or dissolved in a low-viscosity diluting solvent, and then applied to an oiling roller system, a spray method, etc. To 2.0% by weight.

Synthetic fibers treated with the synthetic fiber treatment oil of the present invention,
It shows very good heat resistance and does not reduce the work efficiency by forming tar-like substances on the heater plate heated to 160 to 250 ° C.

Furthermore, the synthetic fiber treatment oil agent of the present invention exhibits good lubricity even under high temperature and high load, and is used in applications having such severe steps, for example, false twisted yarn, sewing yarn, tire cord and other raw materials for industrial materials. It is suitable for all thermoplastic synthetic fibers such as polyamide-based, polyester-based, polypropylene-based etc. as an oil agent for spinning and drawing.

[Examples] Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited to these Examples.

Example 1 Table 2 shows the results of a comparative examination of the heat resistance of the compounds A, B, C, D and E of the present invention shown in Table 1 and the known lubricant components conventionally used. From Table 2, it can be seen that the compound of the present invention has very excellent heat resistance and does not form a tar-like substance.

The tarring rate is measured as follows, and the smaller the number, the better.

Tarring rate measuring method About 0.5 g of a sample was sampled in a commercially available aluminum dish, put in a hot air dryer, heated at 250 ° C. for 4 hours, and then taken out. After allowing to cool to room temperature, the aluminum dish is washed with acetone. Generally, the residual sample that does not dissolve in acetone is a black resinous substance, and the larger this amount, the greater the tarring rate. The tar conversion rate was calculated as follows.

Example 2 In order to compare the lubricity of the compounds A, B, C, D and E of the present invention shown in Table 1 and known lubricant components conventionally used,
Each component was attached to 1% of the thread obtained by deoiling and drying commercially available 1260d nylon tire cord thread.
Table 3 shows the results of measuring the friction coefficient with respect to metal at 0 ° C.

Claims (1)

[Claims] 1. An ester obtained by reacting a compound represented by the following general formula (1) with a compound having one or more carboxyl groups and / or a compound represented by the following general formula (2) and one or more hydroxyl groups. An oil agent for treating synthetic fibers, characterized by containing an ester obtained by reacting with a compound having (In the formula, R ₁ , R ₂ , R ₃ and R ₄ each independently have 6 to 30 carbon atoms.
Represents an alkyl group or an alkenyl group, A0 represents an alkylene oxide group in which A is an alkylene group having 2 to 4 carbon atoms, and n represents an integer of 0 to 30. )