Weatherable fiber-reinforced propylene composition
AssigneeTicona LLC
InventorsAaron H. Johnson, Darin Grinsteinner
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Abstract
A fiber-reinforced polymer composition that comprises a polymer matrix that contains a propylene polymer is provided. The polymer matrix constitutes from about 20 wt. % to about 90 wt. % of the composition, and the composition further comprises 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. Further, the composition also comprises a stabilizer system comprising a sterically hindered phenol antioxidant, phosphite antioxidant, and thioester antioxidant.
Claims24
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 50 wt. % of the composition;
- and
- a stabilizer system consisting of a sterically hindered phenol antioxidant, phosphite antioxidant, thioester antioxidant, and optionally a UV stabilizer, wherein the weight ratio of the thioester antioxidant to the phosphite antioxidant is from about 1:1 to about 5:1 and the weight ratio of the phosphite antioxidant to the sterically hindered phenol antioxidant is from about 1.5:1 to about 5:1,
- wherein the polymer composition exhibits a tensile strength from 140.6 MPa to about 300 MPa as determined according to ISO Test No. 527-1:2012 at 23° C., 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.
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.
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.
Dependencies are inferred from the claim text.