JP4286827B2 - Method for producing polyphenylene sulfide member having excellent light resistance - Google Patents

Description

  The present invention relates to a drug composition for improving the light resistance of a polyphenylene sulfide substrate and a method for producing a light-resistant polyphenylene sulfide member using the drug composition. More specifically, a pharmaceutical composition for preventing the fading of the surface due to light exposure of the polyphenylene sulfide base material and maintaining the color of the appearance of the member, and a method for producing a polyphenylene sulfide member excellent in light resistance using the pharmaceutical composition About.

  Polyphenylene sulfide (PPS) is known to be an excellent resin in terms of heat resistance, rigidity, flame retardancy, dimensional stability, chemical resistance, and the like. Due to this feature, polyphenylene sulfide is expected to be applied to various fields. For example, taking advantage of the above characteristics, polyphenylene sulfide is applied to members such as molded articles used in household electrical appliances (for example, protective films, door knobs and knobs in microwave ovens), and clothing fibers used as clothing materials. It is possible.

  However, polyphenylene sulfide has the property that its surface fades when exposed to light over a long period of time. Therefore, for example, when used in the above applications, there is a problem that the member itself gradually discolors due to poor light resistance. Since the discoloration of the member is inferior in appearance, there is a risk that the consumer may lose the reliability of the product itself.

  Therefore, in the past, polyphenylene sulfide is only required for heat resistance, flame retardancy and chemical resistance, and appearance deterioration due to discoloration is not a problem as a fiber material in the industrial material field such as dryer canvas and bag filter. It was mainly used only.

  Furthermore, polyphenylene sulfide itself has a problem that it cannot be dyed with dyes such as cationic dyes and acid dyes because of the lack of dyeing seat. Furthermore, even when a disperse dye is used, it is difficult to dye using either an atmospheric dyeing machine or a high-pressure dyeing machine. The problem of polyphenylene sulfide, which is difficult to dye, is extremely fatal for products that emphasize the improvement of aesthetic appearance using color.

  Several attempts have been made to dye the polyphenylene sulfide fibers.

  For example, Patent Document 1 discloses a method of dyeing polyphenylene sulfide fiber in the presence of a disperse dye and a carrier at a dyeing temperature equal to or higher than its glass transition temperature. In the invention described in this document, methylnaphthalene-based, orthophenylphenol-based, and ester-based compounds are used as carriers.

  Furthermore, patent document 2 is disclosing the dyeing | staining method of the polyphenylene sulfide fiber which the washing fastness of dyeing improved. The method described in this document is characterized in that polyphenylene sulfide fiber is thermosol dyed at a temperature exceeding the temperature rising crystallinity. The document also discloses the use of anthraquinones such as 1,4-diaminoanthraquinone and 1-aminoanthraquinone for dyeing polyphenylene sulfide fibers.

However, even if the polyphenylene sulfide fiber is dyed using any of the above methods, the obtained polyphenylene sulfide fiber still has a problem that fading due to light easily occurs and light resistance is poor. Therefore, these methods cannot sufficiently satisfy the demand for improving fashionability in the clothing field.
Japanese Patent Laid-Open No. 1-272883 JP-A-4-289279

  An object of the present invention is to solve the above-mentioned problems, and the object of the present invention is to maintain the color over a long period of time without causing a color change of the surface of the member due to light exposure, and has excellent light resistance. An object of the present invention is to provide a pharmaceutical composition for producing polyphenylene sulfide and a method for producing a polyphenylene sulfide member having excellent light resistance using the pharmaceutical composition.

  The present invention provides a method for producing a polyphenylene sulfide member having excellent light resistance. This method includes the step of contacting a polyphenylene sulfide substrate with a pharmaceutical composition containing an ultraviolet absorber and a covering agent, the ultraviolet absorber having the following general formula (I):

(Wherein R ₁ is a hydrogen atom or a hydroxyl group, R ₂ is a hydroxyl group or a linear or branched alkyloxy group having 1 to 12 carbon atoms, and R ₃ is a hydrogen atom. Or —SO ₃ H, R ₄ is a hydrogen atom or —OCH ₃ , and R ₅ is a hydrogen atom or a hydroxyl group), and the following general formula (II):

(Wherein R ₆ is a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, and R ₇ has 1 to 5 carbon atoms. Linear or branched alkyl, and R ₈ is a hydrogen atom or a chlorine atom), and is at least one selected from the group consisting of:
The covering agent has the following general formula (III):

Wherein A is —O— or —C (O) O—, and R ₉ is a phenyl group or a derivative thereof, or a substituted or unsubstituted phenylalkylene group. Emulsions and the following general formula (IV):

Wherein R ₁₀ is an aliphatic hydrocarbon group having 1 to 5 carbon atoms, and X ₁ and X ₂ are each independently a hydrogen atom or a halogen atom. It is at least one selected from the group consisting of emulsions of compounds.

  In a preferred embodiment, the pharmaceutical composition contains water.

  In a preferred embodiment, the UV absorber is 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole.

  In a preferred embodiment, the contacting step between the polyphenylene sulfide substrate and the pharmaceutical composition is performed at a temperature between 100 ° C and 130 ° C.

  In a preferred embodiment, the pharmaceutical composition further contains a disperse dye.

  The present invention provides a pharmaceutical composition for improving the light resistance of a polyphenylene sulfide substrate. This composition contains an ultraviolet absorber and a covering agent, and the ultraviolet absorber has the following general formula (I):

(Wherein R ₁ is a hydrogen atom or a hydroxyl group, R ₂ is a hydroxyl group or a linear or branched alkyloxy group having 1 to 12 carbon atoms, and R ₃ is a hydrogen atom. Or —SO ₃ H, R ₄ is a hydrogen atom or —OCH ₃ , and R ₅ is a hydrogen atom or a hydroxyl group), and the following general formula (II):

(Wherein R ₆ is a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, and R ₇ has 1 to 5 carbon atoms. The covering agent is at least one selected from the group consisting of compounds represented by the following formula: linear or branched alkyl, and R ₈ is a hydrogen atom or a chlorine atom. Formula (III):

Wherein A is —O— or —C (O) O—, and R ₉ is a phenyl group or a derivative thereof, or a substituted or unsubstituted phenylalkylene group. Emulsions; and the following general formula (IV):

Wherein R ₁₀ is an aliphatic hydrocarbon group having 1 to 5 carbon atoms, and X ₁ and X ₂ are each independently a hydrogen atom or a halogen atom. It is at least one selected from the group consisting of emulsions of compounds.

According to the present invention, it is possible to obtain a polyphenylene sulfide member having excellent light resistance that can prevent the surface from fading due to exposure to light by using a pharmaceutical composition containing an ultraviolet absorber as a main component. it can. Furthermore, by including a covering agent having a specific structure in the composition, light resistance can be imparted to the polyphenylene sulfide substrate at a lower processing temperature. Furthermore, by adding the covering agent and the disperse dye to the treatment liquid, the polyphenylene sulfide base material can be dyed more vividly than before, and the obtained member has excellent light resistance. Have.

  The present invention will be described in detail below.

  The polyphenylene sulfide used in the present invention usually has a structure in which 90% or more of repeating units have the following structure:

And less than 10% of repeating units have the following structure:

It is a polymer having

  In the present invention, the polyphenylene sulfide substrate used for obtaining a polyphenylene sulfide member having excellent light resistance includes fibers, films, sheets, and other molded articles made of the polyphenylene sulfide. Further, the polyphenylene sulfide base material used in the present invention includes fibers, films, sheets and other molded articles made of the above polyphenylene sulfide, and polyester, polyamide (nylon), polyacrylonitrile, polypropylene, polyurethane, polycarbonate and polyethylene. The combination with the fiber, film, sheet | seat which consists of another polymer, and another molded article may be sufficient. Here, the term “other molded article” used in the present invention refers to a woven or knitted fabric made of polyphenylene sulfide fiber, a nonwoven fabric, a blended yarn of the fiber and another fiber, a twisted yarn, a woven or knitted fabric thereof, and a knitted fabric. Containers; housings (covers) used for household appliances and others; and gripping parts such as handles and knobs used for household appliances and others.

  The pharmaceutical composition for improving the light resistance of the polyphenylene sulfide substrate of the present invention contains an ultraviolet absorber, and optionally contains at least one of a dispersant, a covering agent, and water. The method for producing a polyphenylene sulfide member excellent in light resistance according to the present invention includes contacting a polyphenylene sulfide substrate with the above-mentioned pharmaceutical composition, and the pharmaceutical composition further contains a disperse dye and various additives as necessary. You may contain (after-mentioned).

  The ultraviolet absorber contained in the pharmaceutical composition is represented by the following general formula (I):

Here, R ₁ is a hydrogen atom or a hydroxyl group, R ₂ is a hydroxyl group or a linear or branched alkyloxy group having 1 to 12 carbon atoms, and R ₃ is a hydrogen atom or a -SO ₃ H, _{R 4} is a hydrogen atom or -OCH _3, and _{R 5} is a hydrogen atom or a hydroxyl group, a compound represented by, and the following general formula (II):

Here, R ₆ is a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, and R ₇ is a straight chain having 1 to 5 carbon atoms. It is at least one compound selected from the group consisting of a compound represented by the following formula: linear or branched alkyl, and R ₈ is a hydrogen atom or a chlorine atom.

  Among preferable ultraviolet absorbers, examples of the compound represented by the general formula (I) include 2,4-hydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2- Examples include hydroxy-4-dodecyloxybenzophenone, 2,2′-dihydroxy-4-methoxybenzophenone, 2,2′-dihydroxy-4,4′-dimethoxybenzophenone, and 2-hydroxy-4-methoxy-5-sulfobenzophenone. It is done.

  Among preferable ultraviolet absorbers, examples of the compound represented by the general formula (II) include 2- (2′-hydroxy-5′-tert-methylphenyl) benzotriazole, 2- (2′-hydroxy-5). '-Tert-butylphenyl) benzotriazole, 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3', 5 And '-di-tert-butylphenyl) -5-chlorobenzotriazole, and 2- (2'-hydroxy-3', 5'-tert-amylphenyl) benzotriazole.

  In this invention, you may use the ultraviolet absorber which consists of a compound represented with the said general formula (I) and (II) individually or in combination. In the present invention, 2- (2′-hydroxy-3′-tert-butyl-5′-methylphenyl) is used as the ultraviolet absorber because it can provide better light resistance to the polyphenylene sulfide substrate. It is more preferable to use) -5-chlorobenzotriazole.

  The pharmaceutical composition of the present invention preferably contains a dispersant in addition to the ultraviolet absorber. This dispersant is contained for the purpose of improving the dispersibility of the ultraviolet absorber when the pharmaceutical composition of the present invention is used in the form of a treatment liquid (aqueous solution). Examples of the dispersant include a polyoxyalkylene / styrene oxide adduct sulfate, a styrenated phenol / ethylene oxide adduct fatty acid ester, and a polyoxyethylene alkyl allyl ether fatty acid ester. If it improves the dispersibility with respect to the water of the said ultraviolet absorber, it will not specifically limit to the above.

  In addition, in this invention, it is preferable to use together the said ultraviolet absorber which has a specific average particle diameter, and the said dispersing agent. The average particle size of the ultraviolet absorber is preferably 2 μm or less, more preferably 0.1 μm to 1 μm. When the ultraviolet absorber has such an average particle diameter, the light resistance of the resulting polyphenylene sulfide member is further remarkably improved.

  As described above, the pharmaceutical composition may contain the following covering agent.

  The covering agent has the following general formula (III):

Here, A is —O— or —C (O) O—, and R ₉ is a phenyl group or a derivative group thereof, or a substituted or unsubstituted phenylalkylene group. And the following general formula (IV):

Here, R ₁₀ is an aliphatic hydrocarbon group having 1 to 5 carbon atoms, and X ₁ and X ₂ are each independently a hydrogen atom or a halogen atom. It is at least one selected from the group consisting of emulsions.

  Examples of the compound represented by the general formula (III) include phenyl benzoate and derivatives thereof (for example, benzoic acid salicylate); benzyl benzoate and derivatives thereof; diphenyl ether; and phenyl benzyl ether and derivatives thereof. A preferred example of the compound represented by the general formula (III) is benzylbenzoate from the viewpoint of enhancing versatility (for example, less deterioration in odor and light resistance).

  Examples of the compound represented by the general formula (IV) are:

(Here, R ₁₀ is an aliphatic hydrocarbon group having 1 to 5 carbon atoms). Examples of more preferred compounds include

Is mentioned.

  In the present invention, from the viewpoint of enhancing versatility, it is preferable to select a compound containing benzyl benzoate from among the compounds represented by the general formula (III) or (IV) as a covering agent.

  The covering agent used in the present invention is an emulsion of at least one compound represented by the general formula (III) or (IV) as described above. Specifically, it contains at least one compound represented by the general formula (III) or (IV) and an emulsion (emulsified component) such as a surfactant. The compound represented by the general formula (III) or (IV) is preferably contained in a proportion of 10% by weight to 40% by weight with respect to the total weight of the covering agent.

  By using a covering agent, the effect that the process liquid containing this covering agent and a polyphenylene sulfide base material can be contacted at lower temperature is acquired.

  In the method of the present invention, the pharmaceutical composition is used in the form of an aqueous solution (treatment liquid) containing at least an ultraviolet absorber. The amount of the ultraviolet absorber contained in the treatment liquid (drug composition) is preferably 0.1 to 6 parts by weight with respect to 100 parts by weight of polyphenylene sulfide in the base material to be contacted with the treatment liquid. The ratio is preferably 0.5 to 4 parts by weight. If the content of the ultraviolet absorber is less than 0.1 parts by weight, the resulting polyphenylene sulfide member may not have sufficient light resistance. On the other hand, even if the content of the ultraviolet absorber exceeds 6 parts by weight, there is no particularly significant difference in the polyphenylene sulfide member obtained by using the treatment liquid, but rather productivity (economic efficiency). May be inferior.

  When the above-mentioned dispersant is contained in the treatment liquid, the amount of the dispersant is preferably 0.1 to 2 parts by weight with respect to 100 parts by weight of the polyphenylene sulfide content in the base material to be contacted. The ratio is preferably 0.2 parts by weight to 1 part by weight. If the content of the dispersant is less than 0.1 parts by weight, it may be difficult to completely disperse the ultraviolet absorber in the treatment liquid. On the other hand, even if the content of the dispersant exceeds 2 parts by weight, a particularly advantageous difference is not obtained in the polyphenylene sulfide member obtained by using the treatment liquid, and the productivity may rather be inferior.

  When the covering agent is contained in the treatment liquid, the amount of the covering agent is preferably 1 to 20 parts by weight, more preferably 100 parts by weight of polyphenylene sulfide content in the base material to be contacted. The ratio is 2 to 10 parts by weight. When the content of the covering agent is less than 1 part by weight, it may be difficult to process at a lower bath temperature as described above. On the other hand, when the content of the covering agent exceeds 20 parts by weight, in the polyphenylene sulfide member obtained by using the treatment liquid, no particularly significant difference is obtained and the productivity (economic efficiency) is rather inferior. There is a fear.

  The treatment liquid may further contain a disperse dye. In particular, when the treatment liquid contains the dispersant and the covering agent in addition to the ultraviolet absorber, the dyeing ability of the disperse dye for the polyphenylene sulfide substrate can be improved.

  The disperse dyes that can be used are usually disperse dyes used for dyeing polyester fibers. Examples of such disperse dyes include Dianics Yellow SE-G (Dystar), Dianics Yellow AM-42 (Dystar), Dianics Yellow Brown SE-R (Dystar), Dianic Thread SE-CB (manufactured by Dystar), Dianic Thread S-2B (manufactured by Dystar), Dianic Surbin SE-B (manufactured by Dystar), Dianix Blue S-BG (manufactured by Dystar), Dianix Navy SE- RN300% (Dystar), Dianics Black SE-RN300% (Dystar), Dianics Yellow AC-E (Dystar), Dianic Thread AC-E01 (Dystar), Dianics Blue AC- E (Dystar), Diani SUBLUE E-R 150% (Dystar Co., Ltd.), SUMIKARON BLUE E-FBL (SUMITOMO CHEMICAL CO., LTD.), SUMIKARON Navy Blue S-2GL (SUMITOMO CHEMICAL CO., LTD.), And SUMIKARON BLUE S-BG ( Sumitomo Chemical Co., Ltd.). The types of disperse dyes that can be used in the present invention are not limited to the above.

  The disperse dye contained in the treatment liquid is preferably 0.001 to 40 parts by weight, more preferably 0.01 to 20 parts by weight with respect to 100 parts by weight of the polyphenylene sulfide content in the substrate to be contacted. It is contained in the ratio. If the content of the disperse dye is less than 0.001 part by weight, color unevenness or the like may occur, and the polyphenylene sulfide substrate may not be sufficiently dyed. On the other hand, when the content of the disperse dye exceeds 40 parts by weight, no particularly significant difference is obtained in the dyeing concentration of the polyphenylene sulfide member obtained by using the treatment liquid, which is rather inferior in economic efficiency. There is a fear.

  The treatment liquid may further contain an additive such as a pH adjuster as necessary. The pH adjuster is added mainly to prevent thermal decomposition of the disperse dye.

  According to the method of the present invention, polyphenylene is added to the treatment liquid containing the ultraviolet absorber (and preferably a dispersant and / or a covering agent) as a pharmaceutical composition and a disperse dye and / or an additive added as necessary. Contact the sulfide substrate. Arbitrary means such as dipping, spraying, and coating are used for contact with the treatment liquid. In this invention, it is preferable to make it contact by immersion from the point which is excellent in workability | operativity. Specifically, for example, by using a high-pressure high-temperature container (for example, a high-pressure dyeing machine), the substrate is preferably treated at a bath ratio of 4 to 400 times, more preferably 8 to 40 times. Soak in a treatment bath containing The treatment temperature is not particularly limited, but the light resistance of the polyphenylene sulfide member obtained is further improved by adjusting the temperature to preferably 140 ° C. or higher, more preferably 140 ° C. or higher and 150 ° C. or lower. When the covering agent is contained in the treatment liquid, the preferred treatment temperature can be lowered, and a temperature of 100 ° C. to 130 ° C. is suitable. When the treatment temperature is less than 100 ° C., there is a possibility that sufficient light resistance cannot be provided to the polyphenylene sulfide substrate. The time required for the contact is preferably set to 15 minutes to 120 minutes.

  After the polyphenylene sulfide substrate is brought into contact with the treatment liquid under the above conditions, it is taken out from the treatment bath and subjected to usual treatment such as washing with water.

  As described above, the light resistance of the polyphenylene sulfide base material can be obtained by using the pharmaceutical composition in the form of a treatment liquid containing an ultraviolet absorber alone or in combination with a dispersing agent, a covering agent and the like as necessary. Can be increased. In particular, in the case where the treatment liquid contains a dispersant, a covering agent, and a disperse dye in addition to the ultraviolet absorber, vivid dyeing that has been quite difficult to achieve with the conventional dyeing method is possible, and Since fading is suppressed, vivid colors are maintained over a long period of time.

  In this way, a polyphenylene sulfide member with improved light resistance is produced. By using the production method of the present invention, it is possible to provide sufficient light fastness for the produced base materials such as supporters and bandages that do not require dyeing. Furthermore, by including a disperse dye in the treatment liquid, for example, in innerwear or the like where heat retention and strength are required, sufficient light resistance can be provided and more vivid colors can be imparted. Furthermore, by using the method of the present invention, it can be applied to a cover material (housing) such as a mobile phone; and a heat-resistant protective film used in a cooking chamber of a microwave oven, a household appliance such as a selector lever and a door handle. It is also possible to provide sufficient light resistance for the molded article used.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated further more concretely, this invention is not limited to these Examples.

< Reference Example 1>
A test piece was prepared by cutting a woven fabric made of polyphenylene sulfide fiber (trade name: Torcon: 200 denier, multifilament having 50 filaments / manufactured by Toray Industries, Inc.) into a size of 9 cm × 20 cm. On the other hand, based on 100 parts by weight of the fabric, 2 parts by weight of 2- (2′-hydroxy-3′-tert-butyl-5′-methylphenyl) -5-chlorobenzotriazole dispersion (of the total weight of dispersion) , Containing 30% by weight of the chlorobenzotriazole), dispersant (Sunsolt RM340 (manufactured by Nikka Chemical Co., Ltd .: sulfate of polyoxyalkylene / styrene oxide adduct and fatty acid ester of styrenated phenol ethylene oxide adduct) 1 part by weight and 2000 parts by weight of water were weighed and mixed to prepare a treatment liquid.

  The test piece was immersed in a bath containing the treatment solution at a temperature of 140 ° C. for 45 minutes, then washed with water and air-dried to obtain a treated test piece.

  With respect to this processed test piece, the test according to JIS L-0842 “Testing method of dyeing fastness to ultraviolet carbon arc lamp” in accordance with “6. (2) Second exposure method” of JIS L-0842. went. Furthermore, according to JIS L-0801 "9. Determination of fastness to dyeing", the discolored color between the treated test piece and the blue scale was compared by visual sense. The obtained processed test piece was determined to be grade 4.

<Comparative Example 1>
The color fastness of the test piece was determined in the same manner as in Reference Example 1 except that the untreated test piece that was not immersed in the treatment liquid was used as it was in the color fastness test. The obtained judgment result was first grade.

<Example 2>
To the treatment liquid prepared in Reference Example 1, 4 parts by weight of a benzyl benzoate emulsion (similar to Reference Example 1, based on the weight of the woven fabric) was added to make a new treatment liquid. A treated test piece was prepared in the same manner as in Reference Example 1 except that the sample was immersed for 45 minutes, and the same determination was performed. The obtained determination result was grade 3.

<Comparative example 2>
The color fastness of the test piece was determined in the same manner as in Example 2 except that the untreated test piece that was not immersed in the treatment liquid was used as it was in the color fastness test. The obtained judgment result was first grade.

<Example 3>
Two test pieces were prepared by cutting a fabric made of polyphenylene sulfide fiber (trade name: Torcon: 200 denier, multifilament with 50 filaments / manufactured by Toray Industries, Inc.) into a size of 9 cm × 20 cm. On the other hand, based on 100 parts by weight of the fabric, 2 parts by weight of 2- (2′-hydroxy-3′-tert-butyl-5′-methylphenyl) -5-chlorobenzotriazole dispersion (of the total weight of dispersion) , Containing 30% by weight of the chlorobenzotriazole), dispersant (Sunsolt RM340 (manufactured by Nikka Chemical Co., Ltd .: sulfate of polyoxyalkylene / styrene oxide adduct and fatty acid ester of styrenated phenol ethylene oxide adduct) 1 part by weight, 4 parts by weight of benzyl benzoate emulsion, 3.3 parts by weight of disperse dye (Danic Thread AC-E (manufactured by Dystar)) and 2000 parts by weight of water are weighed and mixed to prepare a treatment liquid. did.

  The test piece was immersed in a bath containing the treatment solution at a temperature of 120 ° C. for 45 minutes, then washed with water and air-dried to obtain a treated test piece.

One of the obtained processed test pieces was subjected to the same tests and determinations as in Reference Example 1. The obtained determination result was grade 4 or higher.

  Furthermore, in order to measure the dye density, the total K / S value at 400 nm to 700 nm was measured for the other one of the treated test pieces using a color eye 7000 colorimeter (manufactured by Macbeth). The total K / S value obtained was 28.97.

<Comparative Example 3>
Disperse dye (Danic Thread AC-E (Dystar Co., Ltd.)) 3.3 parts by weight, Dispersant (Sunsolt RM340 (Nikka Chemical Co., Ltd .: Sulfur oxide of polyoxyalkylene / styrene oxide adduct and styrenated phenol) 1 part by weight of fatty acid ester of ethylene oxide adduct) and 2000 parts by weight of water were mixed to prepare a treatment liquid, and two test pieces similar to those in Example 3 were immersed at a temperature of 120 ° C. for 45 minutes, respectively. A treated test piece was obtained by washing with water and air drying, and then the dyeing fastness of the test piece was determined in the same manner as in Example 3. The obtained determination result was grade 1. The total K / S value of this treated test piece was 6.88.

<Example 4>
The treatment liquid was used in the same manner as in Example 3 except that 1.5 parts by weight of Dianics Blue AC-E (Dystar) was used instead of Dianic Thread AC-E (Dystar) as the disperse dye. And two samples were processed.

  Judgment of the dyeing fastness about the obtained processed test piece was the 3rd grade. Moreover, the total K / S value of the obtained processed test piece was 27.29.

<Comparative example 4>
Test piece as in Comparative Example 3, except that 1.5 parts by weight of Dianics Blue AC-E (Dystar) was used instead of Dianic Thread AC-E (Dystar) as the disperse dye. The dyeing fastness was determined. The obtained judgment result was first grade. Furthermore, the total K / S value of this processed test piece was 8.02.

<Example 5>
The treatment liquid was used in the same manner as in Example 3 except that 2.1 parts by weight of Dianics Yellow AC-E (Dystar) was used instead of Dianic Thread AC-E (Dystar) as the disperse dye. And two samples were processed.

  Judgment of the dyeing fastness about the obtained processed test piece was 4th grade. Moreover, the total K / S value of the obtained processed test piece was 23.48.

<Comparative Example 5>
A test piece as in Comparative Example 3 except that 2.1 parts by weight of Dianics Yellow AC-E (Dystar) was used instead of Dianic Thread AC-E (Dystar) as the disperse dye. The dyeing fastness was determined. The obtained judgment result was first grade. Furthermore, the total K / S value of this processed test piece was 6.26.

< Reference Example 6>
The treatment was performed in the same manner as in Reference Example 1 except that a plate (5 cm × 8 cm: thickness 1.2 mm) made of polyphenylene sulfide was used as a test piece instead of the woven fabric made of polyphenylene sulfide fiber. A test was conducted. The obtained determination result was grade 3.

<Comparative Example 6>
The fastness to dyeing of the test piece was determined in the same manner as in Reference Example 6 except that the untreated test piece that was not immersed in the treatment liquid was used as it was in the test for fastness to dyeing. The obtained judgment result was first grade.

  A polyphenylene sulfide member having excellent light resistance that can prevent the surface from fading due to exposure to light is obtained. Such polyphenylene sulfide members can be used in various fields such as molded articles for household electrical appliances and clothing fibers used for clothing materials.

Claims (6)

A method for producing a polyphenylene sulfide member having excellent light resistance,
Contacting the polyphenylene sulfide substrate with a pharmaceutical composition containing a UV absorber and a covering agent;
The ultraviolet absorber has the following general formula (I):

(Wherein R ₁ is a hydrogen atom or a hydroxyl group, R ₂ is a hydroxyl group or a linear or branched alkyloxy group having 1 to 12 carbon atoms, and R ₃ is a hydrogen atom. Or —SO ₃ H, R ₄ is a hydrogen atom or —OCH ₃ , and R ₅ is a hydrogen atom or a hydroxyl group), and the following general formula (II):

(Wherein R ₆ is a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, and R ₇ has 1 to 5 carbon atoms. Linear or branched alkyl, and R ₈ is a hydrogen atom or a chlorine atom), and is at least one selected from the group consisting of:
The covering agent has the following general formula (III):

Wherein A is —O— or —C (O) O—, and R ₉ is a phenyl group or a derivative thereof, or a substituted or unsubstituted phenylalkylene group. is an emulsion,
Method.   The method of claim 1, wherein the pharmaceutical composition contains water.   The method according to claim 1 or 2, wherein the ultraviolet absorber is 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole.   The method according to any one of claims 1 to 3, wherein the contacting step between the polyphenylene sulfide substrate and the pharmaceutical composition is performed at a temperature between 100 ° C and 130 ° C.   The method according to claim 1, wherein the pharmaceutical composition further contains a disperse dye. A pharmaceutical composition for improving the light resistance of a polyphenylene sulfide substrate,
The composition contains a UV absorber and a covering agent;
The ultraviolet absorber has the following general formula (I):

(Wherein R ₁ is a hydrogen atom or a hydroxyl group, R ₂ is a hydroxyl group or a linear or branched alkyloxy group having 1 to 12 carbon atoms, and R ₃ is a hydrogen atom. Or —SO ₃ H, R ₄ is a hydrogen atom or —OCH ₃ , and R ₅ is a hydrogen atom or a hydroxyl group), and the following general formula (II):

(Wherein R ₆ is a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, and R ₇ has 1 to 5 carbon atoms. Linear or branched alkyl, and R ₈ is a hydrogen atom or a chlorine atom), and is at least one selected from the group consisting of compounds represented by:
The covering agent has the following general formula (III):

Wherein A is —O— or —C (O) O—, and R ₉ is a phenyl group or a derivative thereof, or a substituted or unsubstituted phenylalkylene group. is an emulsion,
Pharmaceutical composition.