# US 5,350,806 A · Metal hydroxide additives for poly(arylene sulfide) > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,350,806 A - Document ID: US5350806A - Status: Granted - Kind: A - Application number: 07/815,091 - Filed: 1991-12-27 - Granted: 1994-09-27 - Earliest claimed: 1991-12-27 - Assignees: Phillips Petroleum Company - Inventors: Michael C. Yu; William H. Beever - Web page: https://patentgrep.com/patent/US5350806A ## CPC - C08L 21/00: Compositions of unspecified rubbers - C08K 3/10: Metal compounds - C08K 3/20: Oxides; Hydroxides {(graphene oxides C08K3/042)} - C08L 81/02: Polythioethers; Polythioether-ethers - C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract A composition and method for forming the composition of poly(arylene sulfide) having improved impact strength and crack resistance. The invention involves mixing poly(arylene sulfide) with a polymeric rubber, a metal hydroxide, and a carboxylic anhydride, each in sufficient amounts and in proportions needed to improve impact strength and crack resistance. ## Claims ### Claim 1 A composition comprising poly(arylene sulfide), a polymeric rubber, a metal hydroxide, and a carboxylic anhydride selected from the group consisting of carboxylic anhydrides having about 3 to 10 carbon atoms with at least one olefinic unsaturation and derivatives thereof, and wherein said poly(arylene sulfine) is a water quenched and calcium acetate washed resin. ### Claim 2 (depends on 1) A composition as recited in claim 1 wherein said poly(arylene sulfide) is present in an amount of from about 0.5 weight percent to about 99.5 weight percent based on the total weight of the composition, said polymeric rubber is present in an amount from about 0.1 weight percent to about 99.5 weight percent based on the total weight of the composition, said metal hydroxide is present in an amount from about 0.001 weight percent to about 5 weight percent based on the total weight of the composition, and said carboxylic anhydride is present in an amount from about 0.5 weight percent to about 5 weight percent based on the total weight of the composition. ### Claim 3 (depends on 2) A composition as recited in claim 2 wherein said metal hydroxide is present in an amount from about 0.01 weight percent to about 2 weight percent. ### Claim 4 (depends on 3) A composition as recited in claim 3 wherein said metal hydroxide is present in an amount from 0.05 weight percent to 0.5 weight percent. ### Claim 5 (depends on 1) A composition as recited in claim 1 wherein said metal of said metal hydroxide is chosen from the group of monovalent metals of Periodic Group IA, polyvalent metals of Periodic Group IIA and mixtures of two or more thereof. ### Claim 6 (depends on 1) The composition as recited in claim 1 wherein said metal of said metal hydroxide is chosen from the group consisting of polyvalent metals of Periodic Group IIA. ### Claim 7 (depends on 1) A composition as recited in claim 1 wherein said poly(arylene sulfide) is poly(phenylene sulfide), said polymeric rubber is ethylene-propylene tarpolymer, and said carboxylic anhydride is maleic anhydride. ### Claim 8 (depends on 7) A composition according to claim 7 wherein said metal hydroxide is calcium hydroxide. ### Claim 9 (depends on 8) A composition according to claim 8 wherein said poly(phenylene sulfide) is present in an amount from about 0.5 to about 99.5 weight percent based on the total weight of the composition, said ethylene-propylene tarpolymer is present in an amount from about 0.1 to about 99.5 weight percent based on the total weight of the composition, said calcium hydroxide is present in an amount from about 0.001 weight percent to about 5 weight percent based on the total weight of the composition, and said maleic anhydride is present in an amount from about 0.5 weight percent to about 5 weight percent based on the total weight of the composition. ### Claim 10 (depends on 9) A composition according to claim 9 wherein said calcium hydroxide is present in an amount from about 0.01 weight percent to about 2 weight percent. ### Claim 11 (depends on 10) A composition according to claim 10 wherein said calcium hydroxide is present in the amount from 0.05 weight percent to 0.5 weight percent based on the total weight of the composition. ### Claim 12 (depends on 1) A composition according to claim 1 wherein said composition is formed by melt blending said poly(arylene sulfide), said polymeric rubber, said metal hydroxide, and said carboxylic anhydride. ### Claim 13 (depends on 12) A composition according to claim 12 wherein said metal hydroxide is calcium hydroxide. ### Claim 14 A composition comprising poly(arylene sulfide), a polymeric rubber, a metal hydroxide, and a carboxylic anhydride selected from the group of carboxylic anhydrides having about 3 to 10 carbon atoms with at least one olefinic unsaturation and derivatives thereof, and wherein said poly(arylene sulfide) is a NMP quenched and acid washed resin. ### Claim 15 (depends on 12) A composition according to claim 12 wherein said composition is formed by combining said poly(arylene sulfide) with said metal hydroxide to form a first mixture, melt blending said first mixture to form a first blend, combining said first blend with said polymeric rubber and said carboxylic anhydride to form a second mixture, and melt blending said second mixture to form said composition. ### Claim 16 (depends on 14) A composition according to claim 14 wherein said metal hydroxide is calcium hydroxide.