Patent ID: 11931973
Assignee: TICONA LLC
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 21:
22. A fiber-reinforced polymer composition comprising:
a polymer matrix that contains a propylene polymer, wherein the polymer matrix constitutes from about 20 wt. % to about 90 wt. % of the composition;
a plurality of long reinforcing fibers that are distributed within the polymer matrix, wherein the fibers constitute from about 10 wt. % to about 60 wt. % of the composition; and
a stabilizer system consisting of a sterically hindered phenol antioxidant, a phosphite antioxidant, a thioester antioxidant, and optionally a UV stabilizer, wherein the weight ratio of the phosphite antioxidant to the sterically hindered phenol antioxidant is from about 1.5:1 to about 5:1, and wherein the phosphite antioxidant is an aryl diphosphite having the following general structure (IX):, , wherein,
R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are independently selected from hydrogen, C1 to C10 alkyl, and C3 to C30 branched alkyl.