JPS60181156A - Polyphenylene ether resin composition having improved solvent resistance - Google Patents

Abstract

PURPOSE:The titled composition having improved oil resistance, solvent resistance, mechanical strength and molding properties, containing a polyphenylene ether, a polyester resin, a phenoxy resin, and a specific vinyl copolymer. CONSTITUTION:(A) A polyphenylene ether obtained by subjecting one or more monocyclic phenols shown by the formula I (R1 is 1-3C lower alkyl: R2 and R3 are H, or 1-3C lower alkyl) to polycondensation is blended with (B) a polyester resin, (C) a phenoxy resin shown by the formula II (X1-8 are H, lower alkyl, or halogen; n is >=20, preferably >=70 positive integer), (D) a vinyl copolymer obtained by copolymerizing 50-98mol% styrene compound with an alpha,beta-unsaturated dicarboxylic acid anhydride. In a blending ratio, total amounts of the components B, C, and D are 5-95wt% based on the resin components, the amount of the component B, C, and D are 10-89wt%, 1-80wt%, and 10-89wt% based on the total amounts of the three components, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel polyphenylene ether resin composition having excellent mechanical strength, solvent resistance, oil resistance, and moldability. (BL d) Relating to a polyphenylene ether resin composition made by copolymerizing a riess fk resin, (c) a phenoxy resin, and (d) a styrene compound and an α,β-unsaturated dicarboxylic acid anhydride; polyphenylene ether is It is a resin with excellent heat resistance, rigidity, electrical properties, etc., and is a polymer material useful as engineering graphics.L) However, polyphenylene ether has poor solvent resistance and oil resistance, and +4 It is well known that it has a major drawback of poor moldability.

As a technique for improving the moldability of polyphenylene ether, that is, the flow characteristics, a technique of blending polystyrene resin is disclosed in US Pat. No. 5,585,455, and a technique of blending a styrene compound reinforced with rubber, α
, a technique of blending a copolymer with β-unsaturated dicarboyfi anhydride is disclosed in JP-A-52-128947. However, these techniques do not improve the solvent resistance and oil resistance of polyphenylene ether at all.

-+ a! l1Wf+22A Q -Fs n mouth qn bone ai! IN discloses a technique for improving the moldability, that is, melt flowability, of polyphenylene ether by blending polyester m fat tt with polyphenylene ether. However, according to studies conducted by the present inventors, although blending polyester resin certainly improves the melt fluidity of polyphenylene ether, blending the polyester resin in an amount such that it accounts for 20% by weight or more in the composition It has become clear that in this case, the inherent mechanical strength, especially the tensile strength, of polyphenylene ether is significantly impaired. The resin composition thus obtained is not a material that can withstand practical use. Furthermore, when a polyester resin is blended with polyphenylene ether, the solvent resistance of the polyphenylene ether is improved, but the degree of improvement in solvent resistance is proportional to the amount of polyester resin blended.

Therefore, if the intention is to provide sufficient solvent resistance, a large amount of polyester resin must be blended, and as mentioned above, such blending leads to an undesirable decrease in the mechanical strength of the resulting resin composition. There will be consequences. In any case, the phenomenon that the mechanical strength of polyphenylene ether is impaired when a polyester resin is blended with polyphenylene ether is due to poor compatibility between polyphenylene ether and polyester resin.

By the way, the present inventors first blended polyester resin and phenoxy resin into polyphenylene ether to create a polyphenylene ether with well-balanced physical properties that has excellent mechanical strength and solvent resistance, and also has good moldability. system resin composition and applied for a patent (patent application filed in 1973)
No. 9-2274), but even in such resin compositions, it cannot be said that the mechanical properties are necessarily at a practically satisfactory level.

The purpose of the present invention is to improve the solvent resistance and oil resistance of polyphenylene ether, improve moldability, and find a polyphenylene ether-based resin composition that has particularly excellent mechanical strength. The object of the present invention is to provide a novel polyphenylene ether resin composition that achieves the above object by further interposing a specific vinyl copolymer with polyphenylene ether, polyester resin, and phenoxy resin.

That is, the present invention provides (a) polyphenylene ether, (b) polyester resin, (c) phenoxy resin, and (d
The present invention relates to a polyphenylene ether resin composition containing a J styrene compound and a vinyl copolymer containing an α,β-unsaturated dicarboxylic acid anhydride as a comonomer component.

The polyphenylene ether used in the resin composition of the present invention is a polyphenylene ether obtained by polycondensing one or more monocyclic phenols represented by the general formula (I); Lower alkyl of ~3-T72 Sejut de p3
It is a lower alkyl group having a beam dimension C dimension 12'41r1 to 6, and a lower alkyl substituent must always be present at the ortho position of at least one of the hydroxyl groups. ) It includes a graft copolymer having polyphenylene ether as its core, which is obtained by graft polymerizing a vinyl aromatic compound to rene ether. This polyphenylene ether may be a homopolymer or a copolymer.

Examples of the monocyclic phenol represented by the general formula (I) include 2.6-diethylphenol, 2.6-diethylphenol, 2.6-dipropylphenol, 2-
Methyl-6-ethylphenol, 2-methyl-6-propylphenol, 2-ethyl-6-propylphenol, m-cresol, 2.3-dimethylphenol, 2゜3-diethylphenol, 2.6-dipropylphenol , 2-methyl-3-ethylphenol, 2-methyl-
6-propylphenol, 2-ethyl-3-methylphenol, 2-ethyl-3-propylphenol, 2-propyl-3-methylphenol, 2-propyl-3-ethylphenol, 2,3.6-)dimethylphenol ,
2,3.6-)dimethylphenol, 2゜3.6-driprovirphenol, 2.6-dimethyl-6-ethyl-
Examples include phenol, 2,6-dimethyl-6-p-pyruphenol, and the like. Examples of polyphenylene ether obtained by polycondensation of one or more of these phenols include poly(2,6-dimethyl=1,4-phenylene) ether and poly(2,6-ethyl-1,4-phenylene) ether.
-7enylene)ether, poly(2,6-dipyl-
1,4-phenyleto)ether, poly(2-methyl-6
-ethyl-1,4-phenylene)ether, poly(2-
Methyl-6-,7'rovyl-1,4-phenylene) ether, poly(2-ethyl-6-propyl-1,4-phenylene) ether, 2,6-dimethylphenol/2,
3.6-) dimethylphenol copolymer, 2.6-dimethylphenol/2,3.6=) dimethylphenol copolymer, 2.6-dimethylphenol/2,3.6-)
Dimethylphenol copolymer, 2.6-diprobylphenol/2. '3,6-dimethylphenol copolymer, poly'(2,S-dimethyl-1°4-phenylene)ether, graft copolymer of 1 styrene, 2,6-dimethylphenol/2 , 3.6-) A graft copolymer obtained by graft-polymerizing styrene onto a dimethylphenol copolymer. In particular, poly(2,6
-Simethyl-1,4-7enylene)ether, 2,6-
Dimethylphenol/2,3°6-drimethylphenol copolymer and a graft copolymer obtained by graft-polymerizing each of the former with styrene are preferred as the borifene ether used in the present invention.

The polyester resin used in the resin composition of the present invention refers to a high-molecular weight thermoplastic resin having an ester bond in the main molecule. Polycondensation products obtained from a dicarboxylic acid or its derivative and a cyclic ether compound; Polycondensation products obtained from a metal salt of a dicarboxylic acid and a dihalogen compound; Opening of a cyclic ester compound Examples include ring polymers. Here, the dicarboxylic acid derivative refers to an acid anhydride, an esterified product, or an acid chloride. Dicarboxylic acids may be aliphatic or aromatic, and examples of aromatic dicarboxylic acids include terephthalic acid, inphthalic acid, phthalic acid, chlorophthalic acid, nitrophthalic acid,
p-carpoxylphenylene/'Vinegar 11! , p-phenylene diglycolic acid, p-phenylene diglycolic acid, diphenylethane, diphenyl-plpl-dicarboxylic acid, diphenyl-m, m'-
Dicarboxylic acid, diphenyl-4,4'-diacetic acid, diphenylmethane-p,p'-dicarboxylic acid, diphenylethane-m,m'-dicarboxylic acid, stilbene dicarboxylic acid, diphenylbutane-p,p'-dicarboxylic acid, benzophenone -4,4'-dicarboxylic acid, naphthalene-1,
4-dicarboxylic acid, naphthalene-1,5-dicarboxylic acid, naphthalene-, 2,6-dicarboxylic acid, naphthalene-
2゜7-dicarboxylic acid, p-carboxyphenoxyacetic acid, p-carboxyphenoxybutyric acid, 1゜2-diphenoxypropane-p, p-nic acid, 1.3-siphenokizib ppan-p, p'-dicarboxylic acid, 1.4-diphenoxybutane-p,p'-dicarboxylic acid, 1,5-diphenoxypentane-plpl
-dicarboxylic acid, 1,6-difninoxyhexane-p,
p'-dicarboxylic acid, p-(p-carboxyphenoxy)benzoic acid, 1,2-bis(2-methoxyphenoxy)
-ethane-p,p'-dicarboxylic acid, 1,3-bis(2
-methoxyphenoxy)propane-p,p'-dicarboxylic acid, 1,4-bis(2-methoxyphenoxy)-butane-p,p'-dicarboxylic acid, 1,5-bis(2-methoxyphenoxy)-6- Examples of aliphatic dicarboxylic acids include oxapentane-p, p'-dicarboxylic acid, and examples include oxalic acid, succinic acid, divic acid, corkic acid, azelaic acid, sebacic acid, and dodecanedicarboxylic acid. , usodecanedicarboxylic acid, maleic acid,
Examples include fumaric acid and the like.

Examples of preferred dicarboxylic acids are aromatic dicarboxylic acids, and more preferred are terephthalic acid, isophthalic acid, and phthalic acid.

Examples of dihydric alcohols include ethylene glycol, propylene glycol, trimethylene glycol, butane-1,6-diol, butane-1,4-diol,
2.2-dimethylbutane-1,5-diol, cis
-2-butene-1,4-diol, LranS-2-butene-1,4-diol, tetramethylene glycol,
Examples include pentamethylene glycol, hexamethylene glycol, heptamethylene glycol, octamethylene glycol, decamethylene glycol, and the like. Examples of preferred dihydric alcohols are ethylene glycol, propylene glycol, trimethylene glycol, butane-1,
4-diol or butane-1,3-diol, more preferably ethylene glycol and butane-1,3-diol.
Mention may be made of 1,4-diols. Examples of dihydric phenol compounds include hydroquinone, resorcinol, bisphenol A, and the like.

Examples of the cyclic ether compound include ethylene oxide and propylene oxide, and examples of the cyclic ester compound include δ-varep lactone and ξ
- Mention may be made of caprolactone. The dihalogen compound to be reacted with the dicarboxylic acid metal salt is the above 2gB
A compound obtained by replacing two hydroxyl groups of an alcohol or dihydric phenol compound with a halogen atom such as chlorine or bromine.

The polyester resin used in the resin composition of the present invention may be manufactured by a known method using the above-mentioned raw materials.
Methods taught in Japanese Patent No. 13998, No. 34-2594, and other known documents are employed.

The phenoxy resin used in the resin composition of the present invention is a polycondensate of epichlorohydrin and bisphenol At or its nuclear substituted product (wherein Xl to x8 may be the same or different, A hydrogen atom; a lower alkyl group such as a methyl group or an ethyl group; or a halogen atom such as chlorine or bromine, where n is a positive integer of 20 or more.) The phenoxy resin preferably used in the present invention is: A more preferable phenoxy resin is a polymer having the formula (Ill) where n is 70 or more, and a more preferable phenoxy resin is a derivative formula such as epichlorohydrin and bisphenol A, or a polymer having the formula (Ill) where n is 70 or more.

Such phenoxy resin can be produced by condensing bisphenol A or its nuclear substituted product with epichlorohydrin in the presence of an alkali such as caustic soda.
No. 602゜075 or No. 3,505,528 teaches this invention, and these are cited as references.

Furthermore, another component used in the resin composition of the present invention is a vinyl copolymer (hereinafter simply referred to as "vinyl (abbreviated as “copolymer”) is
A copolymer obtained by copolymerizing a styrene compound, an α,β-unsaturated dicarboxylic acid anhydride, and optionally a third comonomer component in the presence of a radical polymerization initiator. As for the polymerization method itself, any known method such as bulk polymerization, solution polymerization, suspension polymerization, or emulsion polymerization may be used. The vinyl copolymer includes:
Also included are elastomer-reinforced high-impact vinyl copolymers, which are prepared by mixing a vinyl copolymer with an elastomer or by incorporating the comonomer components in the presence of an elastomer. Obtained by copolymerization. The elastomer used here will be detailed later.

Here, the styrene compound is defined by the following general formula (wherein R4 represents a hydrogen atom or a lower alkyl group, 2 represents a halogen atom or a lower alkyl group, and p represents 0 or 1 to 6
is a positive integer. ) vinyl monomers represented by styrene, paramethylstyrene, orthomethylstyrene, dimethylstyrene, ethylstyrene,
Chlorstyrene, bromustyrene, isopropylstyrene, α-methylstyrene, etc. can be mentioned, and these may be used in combination as desired. The other comonomer constituting the vinyl copolymer, α,β-unsaturated dicarboxylic acid anhydride, is a vinyl monomer that can be copolymerized with the styrene compound, and specifically, , non-acid, itanic anhydride, aconitic anhydride, etc., and these may be used in combination as desired. The third comonomer component used as desired should naturally be a compound copolymerizable with the vinyl monomer essential to the vinyl copolymer, and specifically, acrylic. Mention may be made of acids or methacrylic acid and their esters and acrylonitrile. In vinyl copolymers, the styrene compound is the same as the styrene compound on a monomer basis.

50 to 9 relative to the sum with β-unsaturated dicarboxylic acid anhydride
It should occupy a range of 8 mol%.

As the vinyl copolymer preferably used for
# is obtained by reinforcing water-rv acid copolymer, styrene/maleic anhydride/acrylic ester copolymer, styrene, maleic anhydride, methacrylic ester copolymer, or these copolymers with an elastomer. Among them, a styrene/maleic anhydride copolymer or an impact resistant styrene/maleic anhydride copolymer is more preferably used.

In the resin composition of the present invention, (a) polyester resin (with polyphenylene ether), (c) phenoxy resin, and (dl vinyl copolymer) can be easily mixed in any proportion, but the objects of the present invention can be achieved. In order to achieve this, the polyester resin, phenoxy resin, and vinyl copolymer should be blended in an amount that accounts for a total proportion of 5 to 95% by weight in the resin composition of the present invention. Regarding the mixing ratio of the champion between the phenoxy resin and the vinyl copolymer, based on the total amount of the champion, the polyester resin is 10 to 89% by weight, and the phenoxy resin is 1 to 80% by weight.
i% by weight, and the vinyl copolymer should account for a proportion ranging from 10 to 89% by weight.

In preparing the polyphenylene ether resin composition of the present invention, any known method may be used to mix the composition components polyphenylene ether, polyester resin, phenoxy resin, and vinyl copolymer. For example, a method of melt-kneading using a roll mill, a Banbury mixer 1 extruder, etc. is often used.

Friend, the order in which you mix these four ingredients can be either all at the same time, or you can mix two or three of them beforehand and then mix the remaining ingredients. It is more preferable to mix the polyester resin, phenoxy resin, and vinyl copolymer in advance, and then mix the mixture with the polyphenylene ether.

The polyphenylene ether system m of the present invention thus obtained
The IIW composition exhibits extremely unique properties compared to compositions in which polyphenylene ether is blended with polyester resin, or compositions in which polyphenylene ether is blended with polyester resin and phenoxy resin. Not only has the mechanical strength, especially the tensile strength, been significantly improved, but oil resistance has also improved.

The reason why the polyphenylene ether resin composition of the present invention exhibits such a unique effect is not necessarily clear. However, it's just a matter of time. /X (Jour
ual of Applied PolymerSci
ence), Vol. 23, pp. 645-659 (1979), it is reported that when a mixture of polyester resin and phenoxy resin is heated and kneaded, chemical bonds are formed between the two resins as a result of the ester resins interchanging. Also in the resin composition of the invention,
When they are heated and kneaded, a chemical bond is created between the polyester resin and phenoxy resin, and the vinyl copolymer or polyphenylene ether is also involved, and as a result, polyphenylene ether, polyester resin, phenoxy resin, and vinyl A blended state not found in conventional compositions is formed between the copolymer and the resin composition of the invention, and the resin composition of the invention may optionally contain other resins; elastomers. : Flame retardants, flame retardant aids, anti-oxidant additives;
Pigments, fillers, and other components may be blended as appropriate.

Examples of other resins include polystyrene resin,
Examples include epoxy resin, polyamide, polycarbonate, polysulfone, and the like.

and the polymer contains at least 25% by weight or more of a structural unit represented by the following general formula (g) (wherein R is a hydrogen atom or a lower fulkyl group, 2 is a halogen atom or a lower alkyl group, and 2 is a halogen atom or a lower alkyl group). (where p is 0 or a positive integer from 1 to 3.) For example, polystyrene, high impact polystyrene, styrene, butadiene, copolymer, styrene, butadiene, acrylonitrile copolymer, styrene, acrylonitrile copolymer, styrene, α−
Mention may be made, by way of example, of methylstyrene, copolymers, poly p-methylstyrene, impact-resistant poly-p-methylstyrene, and the like. Here, rubber-modified polystyrene modified with a rubber component such as impact-resistant polystyrene, polybutadiene, butadiene-styrene copolymer rubber, or EP'D'M is included.

The elastomer is an elastomer in the general sense, for example as described in "Pr.
aperties and 5 structures o
f Poly-mers” (John Wi le
Y & 5ons, Inc., 196o) 71
~ You can quote the definition adopted on page 78, elastomer is Young's modulus force at room temperature) 10*t+a4n/
) n a'/, J) means a polymer. Specific examples of elastomers include A-B-# type elastomeric block copolymers, A, -B-
A! type elastomeric block copolymers, polybutadiene, polyisoprene, copolymers of diene compounds and vinyl aromatic compounds, nitrile rubber, ethylene-propylene copolymers, ethylene-propylene-diene copolymers (E
PDM), thiocol rubber, polysulfide rubber, acrylic acid rubber, polyurethane rubber, a graft product of butyl rubber and polyethylene, polyester elastomer, polyamide elastomer, and the like. In particular, A-
B-A' type elastomeric block copolymers are preferred.

The terminal blocks A and A1 of this block copolymer are polymerized vinyl aromatic hydrocarbon blocks, and B is a polymerized conjugated diene block or a conjugated diene block in which most of the double bonds are hydrogenated. , the molecular weight of the B block is preferably greater than the combined molecular weight of the A and A' blocks. The terminal blocks A and AI may be the same or different, and the block is a thermally permeable homopolymer or copolymer derived from a vinyl aromatic compound in which the aromatic moiety may be monocyclic or polycyclic. It is. Examples of such vinyl aromatic compounds include styrene, alpha-methylstyrene, vinyltoluene, vinylxylene, ethylvinylxylene, vinylnaphthalene cane, and mixtures thereof. Central block B is an elastomeric polymer derived from conjugated diene hydrocarbons such as 1,3-butadiene, 2,3-dimethylbutadiene, isoprene and 1,3-pentadiene and mixtures thereof. The molecular weight of each end block A and N preferably ranges from about 2,000 to about 100,000;
On the other hand, the molecular weight of central block B is approximately 25,00
0 to about 1,000. This is the range of DOO.

Such elastomers are also used in the production of the impact resistant vinyl copolymers that can be used in the resin compositions of the present invention.

To give examples of the various additives mentioned above, examples of flame retardants include:
Such as triphenyl phosphate, tricresyl phosphate, phosphates obtained from mixtures of isopropylphenol and phenol, phosphates obtained from difunctional phenols such as hesozohydroxyne or bispheno-A and other alcohols or phenols. Phosphate esters; decabromo biphenyl, pentabromotoluene, decabromo biphenyl ether,
Examples include brominated compounds such as hexabromobenzene and brominated polystyrene; nitrogen-containing compounds such as cyanuric acid derivatives and melamine derivatives. Combustion aids may be used, examples of which include antimony, boronate, zinc or iron compounds. Other additives include sterically hindered phenols, acid diamide compounds of phosphite compounds, ultraviolet absorbers exemplified by sterically hindered amine compounds, and lubricants exemplified by polyethylene wax, polypropylene wax, and paraffin. It will be done. Furthermore, pigments such as titanium oxide, zinc sulfide, and zinc oxide; glass fiber, glass peas, asbestos, wollastonite, mica, talc, clay 1, carbonaceous, magnesium hydroxide, silica,
Mineral fillers exemplified by potassium titanate fibers, diatomaceous earth, rock wool; inorganic fillers typified by flakes of aluminum or zinc, or fibers of metals such as brass, aluminum-zinc, etc.: charcoal. , organic fillers typified by elementary fibers.

Further, it is preferable to add the following auxiliary agents to the resin composition of the present invention in order to enhance the effects and the unique properties brought about by the composition. Examples of such auxiliaries include trimethylamine, triethylamine, diethylenetriamine, triethylenetetramine, dimethylene perazine, benzyldimethylamine, Metaphenylenediamine, diaminodiphenylmethane, xylylenediamine, ethylmethylimidazole, phenylimidazole, 2-
Organic bases such as phenyl-4-methyl-5-hydroxymethylimidazole; organic bases such as maleic anhydride, dodecylsuccinic anhydride, hexahydrophthalic anhydride, methylnadic anhydride, pyromellitic anhydride, benzophenonecarboxylic anhydride, etc. Acids can be exemplified.

The polyphenylene ether resin composition of the present invention will be explained below with reference to Examples and Comparative Examples.

Example 1 Polyethylene terephthalate (melting point measured by DSC is 260°C - manufactured by Toyobo Co., Ltd., grade name r
RE500J) and phenoxy resin (a condensate of bisphenol A and epichlorohydrin, the solution viscosity measured in a MEK solution with a solid content concentration of 40% by weight is approximately 5.
500 cp and a molecular weight of approximately 29,000. It is commercially available from Union Carbide Company under the trade name "Phenoxy Resin" and the grade name rPKHHJ.

) 4 parts by weight and styrene/maleic anhydride copolymer (2 parts by weight)
It has a melt index of 2.211710 minutes as measured at 00°C and 5°C under a 4I load, and is commercially available from ARCO, USA under the trade name "Dylark" and grade name r$232J. Hereinafter, it will be abbreviated as "rSMA resin". ), 22
Melt the mixture with the overlapping part at about 300°C using an extruder,
Mixed and pelletized.

The intrinsic viscosity measured at 25°C using 75 parts by weight of the obtained pellet and chloroform as a solvent was 0.50 (di/
2,6-dimethylphenol/2,5.6-
25 parts by weight of dolimethylphenol copolymer (the proportion of 2,3,6-1-dimethylphenol is 5 mol%) was mixed, and the mixture was melted and kneaded at 600°C using an extruder again. The weight ratio of the composition is polyphenylene ether/polyethylene terephthalate/phenoxy resin/SMA resin=25/49/4/22. ) and extruded to obtain a pellet.

From the thus obtained pellet, 17
8 inch thick dumbbell specimens were molded and tensile strength was measured. In addition, in order to determine the solvent resistance, the pellet was extracted with chloroform using a Soxhlet extractor, and the chloroform-insoluble matter was collected.

The results are shown in Table-1.

As can be seen from the table, the amount of chloroform-insoluble matter is greater than the amount of polyester resin used, and is also greater than the total amount of polyester resin and phenoxy resin. Since components other than the polyester resin are soluble in chloroform, the above results can be understood to mean that chemical bonds were formed between the polyester resin and other resin components, contributing to the improvement of solvent resistance.

Example 2 In the composition of Example 1, 2-phenyl-4-methyl-5-hydroxymethylimidazole was added as an auxiliary agent to the total resin component 1.
Example 1 was repeated except that 0.1 part by weight was added to 00 parts by weight.

The results are shown in Table-1. It can be seen that the tensile strength and solvent resistance are improved.

Comparative Example 1 In Example 1, 4 parts by weight of phenoxy resin and SM
In place of 22 parts by weight of resin A, use high-impact polystyrene (intrinsic viscosity measured at 25°C using chloroform as a solvent: 0).
．． 89dl! Example 1 was repeated, except that 26 parts by weight of the polystyrene matrix with a polystyrene matrix of 1/19 and a gel fraction content of 16% by weight were used. The results are in the table-
Also listed in 1.

Example 3 In Example 1, the amount of polyphenylene ether was changed from 25 parts by weight to 40 parts by weight, and the phenoxy resin was changed from 4 parts by weight to 6 parts by weight. The same operations as in Example 1 were repeated, except that the SMA resin was changed from 22 parts by weight to 8 parts by weight, and 20 parts by weight of the high-impact polystyrene used in Comparative Example 1 was added to change the resin composition. Ta.

The results are shown in Table-1. Compared to the results of Comparative Examples 6 and 4, there is a significant improvement in tensile strength and solvent resistance.

Example 4 In the composition of Example B, 2-phenyl-4-methyl-5-hydroxymethylimidazole was added as an auxiliary agent to the total resin component 1.
Example 3 was repeated except that 0.1 part by weight was added to 00 parts by weight.

The results are shown in Table-1.

Comparative Example 2 40 parts by weight of polyphenylene ether used in Example 1, 26 parts by weight of polyethylene terephthalate used in Example 1, and 34 parts by weight of high-impact polystyrene used in Comparative Example 1
Parts by weight were mixed, and the mixture was melted and kneaded at 300° C. using an extruder to form pellets.

Using the obtained pellet, a test piece was formed in the same manner as in Example 1, and tensile strength measurement and extraction test were conducted in the same manner as in Example 1.

The results are also listed in Table-1.

Comparative Example 3 Example 3 was repeated except that the SMA resin was not used and 28 parts by weight of high-impact polystyrene was used instead of 20 parts by weight.

The results are shown in Table-1.

M) α One to watch ℃ state

Claims (1)

[Claims] False) polyphenylene ether, Φ) polyester resin, (C) phenoxy resin, (d) styrene compound and α,
A polyphenylene ether resin composition having improved solvent resistance, comprising a vinyl copolymer having a β-unsaturated dicarboxylic acid anhydride as a comonomer component.