Polypropylene resin composition for automobile door trims having impact and scratch resistance
OwnerKyung Sik Han, Seung Wook Hwang +1inventors
InventorsKyung Sik Han, Seung Wook Hwang, Byung Soon Park
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Abstract
A polypropylene resin composition for automobile door trims having superior impact resistance, rigidity and scratch resistance, and more particularly, to a partially-crosslinked polypropylene resin composition prepared by adding highly-crystalline polypropylene, partially-crosslinked polypropylene, polyethylene, optionally an ethylene copolymer rubber, and an inorganic filler.
Claims17
A polypropylene resin composition for automobile door trims having superior impact resistance and scratch resistance, which contains:
- (A) 1-70 parts by wt of highly-crystalline polypropylene resin;
- (B) 10-70 parts by wt of partially-crosslinked polypropylene resin, which contains:
- (a) 1-90 parts by wt of crystalline polypropylene resin, which comprises propylene monopolymer or copolymer of propylene and less than 10 mol% of C2-C10 monomer, and wherein the crystalline polypropylene resin has a melt index of 0.1-3 g/10 min (230° C.) and higher than 300,000 g/mol of weight-average molecular weight;
- (b) 10-99 parts by wt of polypropylene resin, which comprises copolymer of propylene and 11-25 mol% of C2-C10 monomer, and has 10-60 g/10 min (230° C.) of melt index;
- (c) 0-10 parts by wt of a crosslinking agent;
- and
- (d) 0.01-2.0 parts by wt of organic peroxide;
- (C) 5-30 parts by wt of polyethylene;
- (D) 0-10 parts by wt of thermoplastic elastic rubber;
- and
- (E) 5-30 parts by wt of an inorganic filler.
An automobile door trim, said automobile door trim being made of a resin comprising, based on 100 parts total:
- (A) between 1 and about 70 parts by wt of highly-crystalline polypropylene resin consisting of propylene monopolymer, a copolymer of propylene and less than about 10 mol% of C2-C10 monomer, or mixture thereof, wherein the melt index of the highly-crystalline polypropylene resin is between 8 to 60 g/10 min (230° C.) and the isotactic index of the highly-crystalline polypropylene resin is higher than 98.5%;
- (B) between 10 and 70 parts by weight of partially-crosslinked polypropylene resin, which contains the reaction product of:
- (a) between 1 and 90 parts by weight of crystalline polypropylene resin, which comprises propylene monopolymer or copolymer of propylene and less than 10 mol% of C2 and/or C4-C10 monomers, wherein the crystalline polypropylene resin has a melt index of 0.1 to 3 g/10 min (230° C.) and higher than 300,000 g/mol of weight-average molecular weight;
- (b) between 10 and 99 parts by weight of copolymer resin consisting of copolymers of propylene and 11-25 mol% of C2 and/or C4-C10 monomers, wherein the copolymer resin has a melt index of 10 to 60 g/10 min (230° C.);
- (c) between 0 and 10 parts by weight of a crosslinking agent;
- and
- (d) between 0.01 and 2 parts by weight of reaction initiator;
- (C) between 5 and 30 parts by weight of polyethylene, wherein the polyethylene has a melt index of about 3 to about 15 g/10 min (230° C.);
- (D) between 0 and 10 parts by weight of thermoplastic elastic rubber;
- and
- (E) between 5 and 30 parts by weight of an inorganic filler, wherein said automobile door trim if formed by molding the resin.
Dependencies are inferred from the claim text.