Propylene polymer composition

Details Propylene polymer composition Propylene polymer composition

C - Chemistry, Metallurgy

08

K

400/3029

C08K 3/00 (2006.01) C08L 23/10 (2006.01) C08L 51/06 (2006.01)

Patent

CA 1272536

PROPYLENE POLYMER COMPOSITION ABSTRACT OF THE DISCLOSURE A propylene polymer composition comprising (A) a modified propylene polymer obtained by treating: (1) 100 parts by weight of a propylene polymer or a mixture of a propylene homopolymer and a ethylene-propylene copolymer rubber, with (2) 0.1 to 50 parts by weight of an organic compound having at least one unsaturated bond in the molecule and a hydroxyl group and (3) 0.01 to 20 parts by weight of an organic peroxide; and (B) a propylene polymer, wherein content of the component (A) in the composition is 5 to 50% by weight. This composi- tion may further contain one or more of (C) an amorphous ethylene-propylene copolymer having a propylene content of 20% to 50% by weight and a Mooney viscosity ML1+4 at 100°C of 20 to 100, (D) a high-density ethylene copolymer having a density of 0.935 g/cm3 or more, (E) a linear low-density ethylene copolymer having a density of not less than 0.900 g/cm3 but less than 0.935 g/cm2, a melting point of 106°C to 130°C, a melt flow rate of 0.01 to 100 g/10 min. and substantially having 3 to 35, based on 1,000 carbon atoms of the backbone carbon chain, of the side-chain alkyl groups having 1 to 10 carbon atoms, and (F) an inorganic filler. The resultant composition has not only an excellent adhesion to polyurethane without the use of a primer, but also has a good weathering resistance.

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