Claims
- 1. A thermoplastic resin composition comprising:
- (a) about 20 to 80% by weight based on total composition weight of polyphenylene ether resin comprising at least one structural unit in its backbone represented by the formula: ##STR4## wherein R.sub.1 represents a lower alkyl group having 1 to 3 carbon atoms; R.sub.2 represents a hydrogen atom or a lower alkyl group having 1 to 3 carbon atoms; and R.sub.3 represents a hydrogen atom or a lower alkyl group having 1 to 3 carbon atoms;
- (b) about 0.01 to 10% by weight based on total composition weight of a saturated or unsaturated aliphatic or aliphatic cyclic carboxylic acid modified aromatic hydrocarbon-formaldehyde resin;
- (c) about 2 to 30% by weight based on total composition weight of a styrene-diene block copolymer; and
- (d) about 20 to 80% by weight based on total composition weight of a polyamide resin.
- 2. The thermoplastic resin composition according to claim 1, wherein the saturated or unsaturated aliphatic or aliphatic cyclic carboxylic acid which modifies the aromatic hydrocarbon-formaldehyde resin is a saturated hydroxy carboxylic acid.
- 3. A method for preparing the thermoplastic resin composition according to claim 1, the method comprising:
- i) melt-mixing said (a) polyphenylene ether resin, said (b) modified aromatic hydrocarbon-formaldehyde resin and said (c) rubber polymer; and then
- ii) adding and melt-mixing a polyamide resin.
- 4. The thermoplastic resin composition according to claim 1, wherein the aromatic hydrocarbon-formaldehyde resin is a viscous liquid or solid resin having a structure represented by the formula: ##STR5## wherein p is an integer of 1 to 20; R.sub.4, which may be the same or different, represents a methylene group, a methylene ether group, or an acetal group; R.sub.5, which may be the same or different, represents a methylol group, a methylene-methoxy group, an ethylenemethoxy group, a methyleneethoxy group, a dimethylene ether methoxy group, or an acetonyl group; R.sub.6, which may be the same of different, represents a lower alkyl group having 1 to 3 carbon atoms; and m is an integer of 0 to 3.
- 5. A thermoplastic resin composition comprising:
- (a) about 20 to 80% by weight based on total composition weight of polyphenylene ether resin comprising at least one structural unit in its backbone represented by the formula: ##STR6## wherein R.sub.1 represents a lower alkyl group having 1 to 3 carbon atoms; R.sub.2 represents a hydrogen atom or a lower alkyl group having 1 to 3 carbon atoms; and R.sub.3 represents a hydrogen atom or a lower alkyl group having 1 to 3 carbon atoms;
- (b) about 0.01 to 10% by weight based on total composition weight of a saturated or unsaturated aliphatic or aliphatic cyclic carboxylic acid modified aromatic hydrocarbon-formaldehyde resin;
- (c) about 2 to 30% by weight based on total composition weight of a styrene-diene block copolymer;
- (d) about 20 to 80% by weight based on total composition weight of a polyamide resin; and
- (e) about 2 to 60% by weight based on total composition weight of a polypropylene resin.
Priority Claims (2)
Number |
Date |
Country |
Kind |
5-021333 |
Feb 1993 |
JPX |
|
5-224591 |
Sep 1993 |
JPX |
|
Parent Case Info
This is a Continuation of application Ser. No. 08/194,221, filed Feb. 9, 1994 now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0244090 |
Apr 1987 |
EPX |
0572676 |
Aug 1993 |
EPX |
2558290 |
Aug 1976 |
DEX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
194221 |
Feb 1994 |
|