Modified polyphenylene ether-polyamide compositions and process
AssigneeGeneral Electric Company
InventorsRobert R. Gallucci, Roelof van der Meer, Roger W. Avakian
Life of this patent
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Abstract
Novel modified polyphenylene ether-polyamide compositions comprising polyphenylene ether, polyamide and a polycarboxylic acid and the reaction product thereof and an improved process for preparing the same.
Claims24
An improved process for the preparation of polyphenylene ether-polyamide compositions wherein the improvement comprises precompounding from about 0.05 to about 4% by weight, based on the total composition, of one or more aliphatic polycarboxylic acid represented by the formula:
- (R.sup.I O).sub.m R(COOR.sup.II).sub.n (CONR.sup.III R.sup.IV).sub.s
- or derivatives thereof wherein R is a linear or branched chain, saturated aliphatic hydrocarbon of from 2 to 20 carbon atoms;
- R.sup.I is selected from the group consisting of hydrogen or an alkyl, aryl, acyl or carbonyl dioxy group of from 1 to 10 carbon atoms;
- each R.sup.II is independently selected from the group consisting of hydrogen or an alkyl or aryl group of from 1 to 20 carbon atoms;
- each R.sup.III and R.sup.IV is independently selected from the group consisting of hydrogen or an alkyl or aryl group of from 1 to 10 carbon atoms;
- m is equal to 1 and (n+s) is greater than or equal to 2, and n and s are each greater than or equal to 0;
- and wherein (OR.sup.I) is alpha or beta to a carbonyl group and at least 2 carbonyl groups are separated by 2 to 6 carbon atoms, with the polyphenylene ether and a modifier resin prior to compounding with the polyamide in order to enhance the impact strength of the final composition;
- said modifier resin having been derived from vinyl aromatic monomers, the blending ratio of polyphenylene ether to polyamide being from 5 to 95 percent by weight of the former to 95 to 5 percent by weight of the latter.
An improved process for the preparation of polyphenylene ether-polyamide compositions wherein the improvement comprises precompounding one or more aliphatic polycarboxylic acid represented by the formula:
- (R.sup.I O).sub.m R(COOR.sup.II).sub.n (CONR.sup.III R.sup.IV).sub.s
- or derivatives thereof wherein R is a linear of branched chain, saturated aliphatic hydrocarbon of from 2 to 20 carbon atoms;
- R.sup.I is selected from the group consisting of hydrogen or an alkyl, aryl, acyl or carbonyl dioxy group of from 1 to 10 carbon atoms;
- each R.sup.II is independently selected from the group consisting of hydrogen or an alkyl or aryl group of from 1 to 20 carbon atoms;
- each R.sup.III and R.sup.IV is independently selected from the group consisting of hydrogen or an alkyl or aryl group of from 1 to 10 carbon atoms;
- m is equal to 1 and (n+s) is greater than or equal to 2, and n and s are each greater than or equal to 0;
- and wherein (OR.sup.I) is alpha or beta to a carbonyl group and at least 2 carbonyl groups are separated by 2 to 6 carbon atoms in an amount sufficient to enhance the impact strength of the polyphenylene ether-polyamide composition, with the polyphenylene ether and a modifier resin prior to compounding with the polyamide, said modifier resin having been derived from vinyl aromatic monomers, the blending ratio of polyphenylene ether to polyamide being from 5 to 95 percent by weight of the former to 95 to 5 percent by weight of the latter.
A process for the preparation of polyphenylene ether-polyamide compositions, said composition being derived from citric acid, a polyphenylene ether, a modifier resin and a polyamide, said process comprising precompounding said citric acid with said polyphenylene ether and said modifier resin prior to compounding with said polyamide, said modifier resin being selected from the group consisting of polymer resins derived from vinyl aromatic monomers, the blending ratio of polyphenylene ether to polyamide being from 5 to 95 percent by weight of the former to 95 to 5 percent by weight of the latter.
A process for the preparation of polyphenylene ether-polyamide composition, said composition being derived from citric acid, a polyphenylene ether, a modifier resin and a polyamide, said process comprising precompounding said citric acid with said polyphenylene ether and said modifier resin prior to compounding with said polyamide, said polyphenylene ether being poly(2,6 dimethyl-1,4-phenylene)-ether, said modifier resin being polystyrene-polybutadiene-polystyrene triblock copolymer, said polyamide being polyamide 6,6, the blending ratio of polyphenylene ether to polyamide being from 5 to 95 percent by weight of the former to 95 to 5 percent by weight of the latter.
A process for the preparation of polyphenylene ether-polyamide composition, said composition being derived from citric acid, a polyphenylene ether, a modifier resin and a polyamide, said process comprising precompounding said citric acid with said polyphenylene ether and said modifier resin prior to compounding with said polyamide, said polyphenylene ether being poly(2,6 dimethyl-1,4-phenylene)ether, said modifier resin being polystyrene-polybutadiene-polystyrene triblock copolymer, said polyamide being polyamide 6,6, wherein said polyphenylene ether is present at a level of about 45 percent by weight of said composition, said polyamide is present at a level of about 45 percent by weight of said composition, and said citric acid is present at a level of about 0.7 percent by weight of said composition.
A process for the preparation of a composition derived from melt blending polyphenylene ether resin, polyamide resin, citric acid and a modifier resin derived from vinyl aromatic monomers, the blending ratio of polyphenylene ether to polyamide being 5 to 95 percent by weight of the former to 95 to 5 percent by weight of the latter, the citric acid being present at a level of from 0.05 to 4 percent by weight based on the total composition, said modifier resin being present at a level of from 5 to 50 parts by weight based on 100 parts by weight of the combined weight of polyphenylene ether and polyamide, said process comprising:
- (a) precompounding the citric acid with polyphenylene ether;
- (b) compounding polyamide with the precompounded citric acid/polyphenylene ether.
Dependencies are inferred from the claim text.