Polyolefin resin composition containing rosin, rosin derivative or petroleum resin

Claim 2

A polyolefin resin composition suitable for forming a molded product with superior adhesion to a cast foamed polyurethane but with little molding shrinkage, which composition comprises a blend of (1) a polyolefin resin selected from the group consisting of (i) a propylene homopolymer, (ii) a crystalline copolymer comprising propylene units as the main component and units of one or more alpha-olefins selected from the group consisting of ethylene, butene-1, 4-methylpentene-1, hexene-1, heptene-1, octene-1 and decene-1, (iii) an ethylene homopolymer or a crystalline copolymer comprising ethylene units as the main component and units of one or more alpha-olefin selected from the group consisting of propylene, butene-1, 4-methylpentene-1 hexene-1, heptene-1, octene-1 and decene-1 or a mixture thereof, (2) 10 to 40 wt. % of a styrene resin selected from the group consisting of (i) a polystyrene, (ii) an acrylonitrile-butadiene-styrene copolymer, (iii) an acrylonitrile-styrene copolymer, (iv) a styrene-methylmethacrylate copolymer, (v) a styrene-maleic anhydride copolymer and a mixture thereof; and (3) 0.5 to 5 wt. % of at least one member selected from the group consisting of rosin, derivatives of rosin and petroleum resin, said percentages being by weight of the polyolefin resin composition.

Claim 3

A polyolefin resin composition as claimed in claim 1 wherein said styrene resin accounts for 15 to 35 wt. %, while said one or more members selected from the group consisting of derivatives of rosin, and petroleum resins accounts for 2 to 4 wt. %: said percentage being by weight of the polyolefin resin composition.

Claim 4

A polyolefin resin composition as claimed in claim 1, wherein said poloyolefin resin is a propylene homopolymer; a crystalline propylene-ethylene block copolymer, a crystalline propylene-ethylene random copolymer or a crystalline propylene-ethylene-butene-1 terpolymer, which crystalline copolymers and terpolymer each contain propylene units as the main component; an ethylene homopolymer; a crystalline ethylene-propylene copolymer, a crystalline ethylene-butene-1 copolymer or a crystalline ethylene-hexene-1 copolymer, which crystalline copolymers each contain ethylene units as the main component; or a mixture thereof.

Claim 5

A polyolefin resin composition for forming a molded product with superior adhesion to a cast foamed polyurethane but with little molding shrinkage; which comprises a blend of (1) a polyolefin resin selected from the group consisting of a (i) propylene homopolymer, (ii) a crystalline copolymer comprising propylene units as the main component and units of one or more alpha-olefins selected from the group consisting of ethylene, butene-1, 4-methylpenene-1, hexene-1,heptene-1, octene-1 and decene-1, (iii) an ethylene homopolymer or a crystalline copolymer comprising ethylene units as the main component and units of one or more alpha-olefins selected from the group consisting of propylene, butene-1,4-methylpentene-1, hexene-1, heptene-1, octene-1, and decene-1, and mixtures thereof; (2) 10 to 40 wt. % of a styrene resin selected from the group consisting of (i) polystyrene, (ii) an acrylonitrile-butadiene-styrene copolymer, (iii) an acrylonitrile-styrene copolymer, (iv) a styrene methylmethacrylate copolymer, and (v) a styrene-maleic anhydride copolymer and a mixture thereof, (3) 0.5 to 5 wt. % of at least one member selected from the group consisting of rosin, derivatives of rosin and a petroleum resin, (4) 5 to 40 wt. % of a filler, said percentages being by weight of the polyolefin resin composition.

Claim 6

A polyolefin resin composition for forming a molded product with superior adhesion to a cast foamed polyurethane but with little molding shrinkage; which comprises a blend of (1) a polyolefin resin selected from the group consisting of a (i) propylene homopolymer, (ii) a crystalline copolymer comprising propylene units as the main component and units of one or more alpha-olefins selected from the group consisting of ethylene, butene-1, 4-methylpenene-1, hexene-1,heptene-1, octene-1 and decene-1, (iii) an ethylene homopolymer or a crystalline copolymer comprising ethylene units as the main component and units of one or more alpha-olefins selected from the group consisting of propylene, butene-1,4-methylpentene-1, hexene-1, heptene-1, octene-1, and decene-1, and mixtures thereof; (2) 10 to 40 wt. % of a styrene resin selected from the group consisting of (i) polystyrene, (ii) an acrylonitrile-butadiene-styrene copolymer, (iii) an acrylonitrile-styrene copolymer, (iv) a styrene methylmethacrylate copolymer, and (v) a styrene-maleic anhydride copolymer and a mixture thereof, (3) 0.5 to 5 wt. % of at least one member selected from the group consisting of rosin, derivatives of rosin and a petroleum resin, (4) 5 to 40 wt. % of a filler, said percentages being by weight of the polyolefin resin composition.

Claim 7

A polyolefin resin composition as claimed in claim 4 wherein said styrene resin accounts for 15 to 25 wt. % while said one or more members selected from the group consisting of rosin, derivatives of rosin, and petroleum resins accounts for 1 to 4 wt. % and said filler accounts for 10 to 35 wt. %, said percentages being the weight of the polyolefin resin composition.

Claim 8

A polyolefin resin composition as claimed in claim 4 wherein said polyolefin resin is a propylene homopolymer; a crystalline propylene-ethylene block copolymer, a crystalline propylene-ethylene random copolymer or a crystalline propylene-ethylene-butene-1 terpolymer, which crystalline copolymers and terpolymer each contain propylene units as the main component; an ethylene homopolymer, a crystalline ethylene-propylene copolymer, a crystalline ethylene-butene-1 copolymer or a crystalline ethylene-hexene-1 copolymer, which crystalline copolymers each contain ethylene units as the main component, or a mixture thereof.

Claim 9

A polyolefin resin composition as claimed in claim 4 wherein said filler is talc, calcium carbonate, barium sulfate, calcium silicate, calcium sulfate, aluminum hydroxide, magnesium hydroxide, mica, a metal powder, a metal fiber, a wooden powder, a chaff powder, a cellulose staple fiber, a synthetic staple fiber, or a mixture thereof.

Claim 10

Composite shaped articles comprising a cast foamed polyurethane shaped part and adhered therewith, a shaped part of the polyolefin resin composition according to claim 1.

Claim 11

Composite shaped articles comprising a cast foamed polyurethane shaped part and adhered therewith a shaped part of the polyolefin resin composition according to claim 4.