Heat curable poly(arylene sulfide) compositions
AssigneePhillips Petroleum Company
InventorsJames T. Edmonds, Jr., Harold Wayne Hill, Jr.
Life of this patent
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Abstract
Poly(arylene sulfide) compositions heat curable to products exhibiting improved high temperature properties are provided comprising a minor amount of alkyl-substituted cyclic repeating units and a major amount of cyclic repeating units free of alkyl substituents. The copolymers can be blended with arylene sulfide homopolymers to provide compositions exhibiting improved curing characteristics, as well as being combined with various fillers to provide coating compositions and laminates formed therefrom.
Claims17
A heat curable poly(arylene sulfide) blend composition exhibiting enhanced cure rates and enhanced thermal stability properties in comparison with poly(arylene sulfides) without alkyl groups which comprises
- a. an arylene sulfide homopolymer free of alkyl substituents in the polymer chain and
- b. an arylene sulfide copolymer having in the polymer chain 1-50 mole percent alkyl-substituted monomeric cyclic repeating units and 99-50 mole percent monomeric cyclic repeating units free of alkyl substituents with the further proviso that the amount of said copolymer present in the blend is sufficient to provide 1-40 mole percent alkyl-substituted cyclic repeating units in the total blend.
A process for reducing the cure time of poly(arylene sulfide) resins when heated to an elevated temperature sufficient to effect cure which comprises forming a blend containing an arylene sulfide homopolymer free of alkyl substitutents in the polymer chain and of an arylene sulfide copolymer having in the polymer chain 1-50 mole percent alkyl-substituted monomeric cyclic repeating units and 99-50 mole percent monomeric cyclic repeating units free of alkyl substituents with the further proviso that the amount of said copolymer present is sufficient to provide 1-40 mole percent alkyl-substituted cyclic repeating units in the total polymeric blend, and heating said blend at an elevated temperature and for a period of time sufficient to effect cure to yield a product having improved high temperature physical properties.
A process for reducing the cure time of poly(arylene sulfide) resins when heated to an elevated temperature sufficient to effect cure which comprises forming a blend containing an arylene sulfide homopolymer free of alkyl substituents in the polymer chain and an arylene sulfide copolymeric reaction product having in the polymer chain 1-50 mole percent alkyl-substituted monomeric cyclic repeating units and 99-50 mole percent monomeric cyclic repeating units free of alkyl substituents with the further proviso that the amount of said copolymer present is sufficient to provide 1-25 mole percent alkyl-substituted cyclic repeating units in the total polymer blend, and heating said blend at an elevated temperature in the range of about 500.degree.-750.degree. F and for a period of time sufficient to effect cure to yield a product having improved high temperature physical properties.
Dependencies are inferred from the claim text.