Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
A composition comprising polystyrene, polyolefin and block copolymers, characterized in that it consists essentially of: A) 60 to 93 parts by weight, per 100 parts of the compositions, of a polystyrene component consisting of 100 to 45% of a thermoplastic styrene-diolefin elastomer graft copolymer with 0 to 55% of thermoplastic styrene homopolymer; B) 2 to 30 parts by weight, per 100 parts of the composition, of polyethylene or polypropylene, and C) 5 to 20 parts by weight, per 100 parts of the composition, of a block copolymer X-Y-X where each X is a polystyrene block of 5,000 to 10,000 molecular weight and Y is a hydrogenated polybutadiene block of 25,000 to 50,000 molecular weight, the total molecular weight of the block copolymer being less than 60,000.
Claim 2
Dependent Claim
126 words
A composition comprising polystyrene, polyolefin and block copolymers, characterized in that it consists essentially of: A) 60 to 93 parts by weight, per 100 parts of the compositions, of a polystyrene component consisting of 100 to 45% of a thermoplastic styrene-diolefin elastomer graft copolymer with 0 to 55% of thermoplastic styrene homopolymer; B) 2 to 30 parts by weight, per 100 parts of the composition, of polyethylene or polypropylene, and C) 5 to 20 parts by weight, per 100 parts of the composition, of a block copolymer X-Y-X where each X is a polystyrene block of 5,000 to 10,000 molecular weight and Y is a hydrogenated polybutadiene block of 25,000 to 50,000 molecular weight, the total molecular weight of the block copolymer being less than 60,000.
Claim 3
Dependent Claim
30 words
Composition as claimed in claim 1, characterized in that it comprises 70-85 parts by weight component A), 5-20 parts by weight component B) and 8-15 parts by weight component C).
Claim 4
Dependent Claim
27 words
Composition as claimed in claim 1 or 2, characterized in that the weight ratio of component C) to component B) is in the range 0.5:1 to 2:1.
Claim 5
Dependent Claim
34 words
Composition as claimed in claim 1, 2 or 3, characterized in that the block copolymer X-Y-Xcomponent C) is produced by selective hydrogenation of a precursor block copolymer X-Y'-X wherein Y' represents a polybutadiene block.