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US 8,008,388 B2Granted
Weatherable glass fiber reinforced polyolefin composition
AssigneeFerro Corporation
InventorsDeenadayalu Chundury, Benjamin A. Jones, Theophilus McGee, Morris Mou-Shen Lee, Junior R. Seymour
Life of this patent
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Abstract
Glass fiber reinforced olefin compositions comprise polypropylene homopolymers, polypropylene copolymers, opacifying pigments, fibrous reinforcers, light stabilizers, lubricants and antioxidants. The opacifying pigments are advantageously ZnO, ZnS or surface treated anatase TiO2.
Claims19
A composition comprising:
- a. about 40 wt % to about 90 wt % of a polypropylene homopolymer,
- b. about 10 wt % to about 50 wt % of a polypropylene copolymer,
- c. about 10 wt % to about 40 wt % of a fibrous reinforcer,
- d. about 0.1 wt % to about 2 wt % of a hindered amine light stabilizer having a molecular weight from about 100 to 1000,
- e. about 0.1 wt % to about 2 wt % of a hindered amine light stabilizer having a molecular weight of greater than 1000 to about 5000,
- f. about 0.05 wt % to about 0.8 wt % of antioxidants,
- g. about 0.01 wt % to about 1 wt % of a lubricant package,
- h. about 0.1 wt % to about 3 wt % of a maleic anhydride copolymer,
- i. about 0.1 wt % to about 0.3 wt % of a pigment selected from the group consisting of ZnO, ZnS, and surface treated anatase TiO2.
6 more elements
A composition comprising:
- j. about 40 wt % to about 90 wt % of a polypropylene homopolymer,
- k. about 10 wt % to about 50 wt % of a polypropylene copolymer,
- l. about 10 wt % to about 40 wt % of a fibrous reinforcer,
- m. about 0.1 wt % to about 2 wt % of a hindered amine light stabilizer having a molecular weight from about 100 to 1000,
- n. about 0.1 wt % to about 2 wt % of a hindered amine light stabilizer having a molecular weight of greater than 1000 to about 5000,
- o. about 0.05 wt % to about 0.8 wt % of antioxidants,
- p. about 0.01 wt % to about 1 wt % of a lubricant package,
- q. about 0.1 wt % to about 3 wt % of a maleic anhydride copolymer,
- r. about 0.1 wt % to about 5 wt % of at least two pigments selected from the group consisting of ZnO, ZnS, and surface treated anatase TiO2.
6 more elements
Dependencies are inferred from the claim text.