Poly(arylene sulfide) composition containing an ethylene polymer
AssigneePhillips Petroleum Company
InventorRoy F. Wright
Life of this patent
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Abstract
A poly(arylene sulfide) composition containing a minor amount of low-density polyethylene. In applications such as poly(arylene sulfide) reinforced molding compositions, the invention composition will generally contain a poly(phenylene sulfide), a reinforcing material such as glass or carbon fibers, and from about 0.1 to about 10 weight percent, based on the weight of the composition, of an ethylene polymer having a density of from about 0.910 to about 0.940 g/cc and a melt index of greater than 100 g/10 min.
Claims24
A composition comprising
- (a) a poly(arylene sulfide),
- (b) an ethylene polymer having a density in the range of about 0.910 to about 0.940 g/cc and a melt index of greater than about 100 g/10 min present in an amount within the range of about 0.1 to about 10 weight percent, based on the weight of the composition, and
- (c) a fibrous reinforcing material.
A composition comprising
- (a) a poly(phenylene sulfide) present in an amount of from about 50 to about 65 weight percent;
- (b) an ethylene homopolymer having a density of from about 0.910 to about 0.930 g/cc and a melt index of greater than about 400 g/10 min and present in an amount of from about 0.25 to about 3 weight percent;
- and
- (c) a fibrous reinforcing material present in an amount of from about 25 to about 45 weight percent, based on the weight of the composition.
In a molding method wherein a reinforced poly(arylene sulfide) molding composition is extruded at an elevated temperature, the improvement which comprises extruding a reinforced poly(arylene sulfide) molding composition comprising an ethylene polymer having a density of from about 0.910 to about 0.940 g/cc and a melt index of greater than about 400 g/10 min.
A method for improving the crack resistance of a molded article prepared from a poly(arylene sulfide) molding composition, the method comprising
- incorporating an ethylene polymer having a density of from about 0.910 to about 0.940 g/cc and a melt index of greater than about 400 g/10 min in a molding composition comprising poly(arylene sulfide) and a fibrous reinforcing material.
Dependencies are inferred from the claim text.