Claims
- 1. A polyamide resin composition which comprises: (a) 3 to 40 weight % of a core-shell polymer which comprises:
- (1) a core phase which is a rubbery polymer having a glass transition temperature not higher than -30.degree. C. and which is formed by polymerizing an alkyl acrylate monomer containing 2 to 8 carbon atoms in the alkyl moiety, in the presence of an alkane polyol acrylate as a cross-linking monomer and an allyl (meth) acrylate as a grafting monomer, and
- (2) a shell phase which is a glassy polymer having a glass transition temperature not lower than 40.degree. C. and which is formed by copolymerizing methyl methacrylate and 10 to 18 weight % of an alkyl acrylate having up to 4 carbon atoms in the alkyl moiety with fumaric acid, itaconic acid or ethyl maleate, the amount of the core phase being from 50 to 90 weight % based on the whole core-shell polymer and the amount of the shell phase being from 10 to 50 weight % based on the whole core-shell polymer, and the toluene-soluble fraction of the core-shell polymer accounting for not more than 10% by weight; and
- (b) a polyamide resin.
- 2. A polyamide resin composition as claimed in claim 1, wherein the alkyl acrylate monomer containing 2 to 8 carbon atoms in the alkyl moiety of the core-shell polymer is ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate or a mixture thereof.
- 3. A polyamide resin composition as claimed in claim 1, wherein the alkyl acrylate monomer containing 2 to 8 carbon atoms in the alkyl moiety of the core-shell polymer is butyl acrylate.
- 4. A polyamide resin composition as claimed in claim 1, wherein the alkane polyol acrylate as a cross-linking monomer of the core-shell polymer is 1,4-butylene glycol diacrylate.
- 5. A polyamide resin composition as claimed in claim 1, wherein the allyl (meth) acrylate as the grafting monomer is allyl methacrylate.
- 6. A polyamide resin composition as claimed in claim 1, wherein the alkyl acrylate having up to 4 carbon atoms in the alkyl moiety is ethyl acrylate.
- 7. A polyamide resin composition as claimed in claim 1, wherein the amount of the cross-linking monomer and the grafting monomer are respectively in the range of 0.01 to 5% by weight based on the core portion.
- 8. A polyamide resin composition as claimed in claim 1, wherein the amount of the cross-linking monomer and the grafting monomer are respectively in the range of 0.1 to 2% by weight based on the core portion.
- 9. A polyamide resin composition as claimed in claim 1, wherein the amount of fumaric acid, itaconic acid or ethyl maleate of the core-shell polymer is in the range of 1 to 20% by weight based on the shell portion.
- 10. A polyamide resin composition as claimed in claim 1, wherein the toluene-soluble fraction of the core-shell polymer accounts for not more than 5% by weight.
- 11. A polyamide resin composition as claimed in claim 1, wherein the polyamide resin is polyamide 6 and/or polyamide 6.6.
- 12. A polyamide resin composition as claimed in claim 1, wherein the amount of the core-shell polymer is in the range of 5 to 25% by weight based on the polyamide resin composition.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-267843 |
Oct 1989 |
JPX |
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Parent Case Info
This application is a continuation of now abandoned application Ser. No. 07/596,088, filed Oct. 11, 1990, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0051471 |
May 1982 |
EPX |
0259097 |
Mar 1988 |
EPX |
55-135157 |
Oct 1980 |
JPX |
57-34153 |
Feb 1982 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
596088 |
Oct 1990 |
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