Thermoplastic composition with low hydrocarbon uptake
AssigneeTicona LLC
InventorsBin Zhang, Rong Luo, Xiaoyan Tu
Life of this patent
Estimating the term…
Abstract
Thermoplastic compositions are described that exhibit resistance to hydrocarbon absorption. Methods for forming the thermoplastic compositions are also described. Formation methods include combining a polyarylene sulfide with a first impact modifier and a second impact modifier such that the impact modifiers are dispersed throughout the polyarylene sulfide. A crosslinking agent can be combined with the other components of the composition following dispersal of the additives throughout the composition to dynamically crosslink at least one of the first and second impact modifiers.
Claims36
A thermoplastic composition including
- a polyarylene sulfide,
- a first impact modifier in an amount of less than 20% by weight based on the weight of the thermoplastic composition, and
- a second impact modifier,
- wherein the first impact modifier is a crosslinked impact modifier.
A method for forming a thermoplastic composition comprising:
- feeding a polyarylene sulfide to a melt processing unit;
- feeding a first impact modifier to the melt processing unit, the polyarylene sulfide and the impact modifier mixing in the melt processing unit such that the impact modifier becomes distributed throughout the polyarylene sulfide, wherein the first impact modifier is present in an amount of less than 20% by weight based on the weight of the thermoplastic composition;
- feeding a second impact modifier to the melt processing unit, the polyarylene sulfide and the second impact modifier mixing in the melt processing unit such that the second impact modifier becomes distributed throughout the polyarylene sulfide;
- and
- crosslinking at least one of the first and second impact modifiers.
Dependencies are inferred from the claim text.