| 摘要 |
<p>A rubber-reinforced styrene resin composition consisting essentially of: (1) 2-30% by weight of a grafted rubbery polymer wherein 100 parts by weight of a rubbery polymer (I) is grafted with less than 30 parts by weight of a polymer of a monomer component (A) consisting of (a) 10-95% by weight of at least one aromatic alkenyl compound, (b) 1-60% by weight of at least one alkenyl cyanide compound and (c) 0-89% by weight of at least one other copolymerizable monomer [(a) + (b) + (c) = 100% by weight], (2) 5-40% by weight of a grafted rubbery polymer wherein 100 parts by weight of a rubbery polymer (II) is grafted with 30 parts by weight or more of a polymer of a monomer component (A min ) consisting of (a min ) 10-95% by weight of at least one aromatic alkenyl compound, (b min ) 1-60% by weight of at least one alkenyl cyanide compound and (c min ) 0-89% by weight of at least one other copolymerizable monomer [(a min ) + (b min ) + (c min ) = 100% by weight], and (3) 40-93% by weight of a styrene copolymer of a monomer component (A sec ) consisting of (a sec ) 10-95% by weight of at least one aromatic alkenyl compound, (b sec ) 1-60% by weight of at least one alkenyl cyanide compound and (c sec ) 0-89% by weight of at least one other copolymerizable monomer [(a sec ) + (b sec ) + (c sec ) = 100% by weight] [(1) + (2) + (3) = 100% by weight]. Said rubber-reinforced styrene resin composition is produced by compounding: (1 min ) 5-40% by weight of a graft copolymer obtained by graft-polymerizing, in the presence of 5-80 parts by weight of a rubbery polymer (I), 95-20 parts by weight of a monomer component (A) consisting of (a) 1095% by weight of at least one aromatic alkenyl compound, (b) 1-60% by weight of at least one alkenyl cyanide compound and (c) 0-89% by weight of at least one other copolymerizable monomer [(a) + (b) + (c) = 100% by weight] [(I) + (A) = 100 parts by weight], the grafting degree of the grafted rubbery polymer contained in the min graft copolymer being less than 30% by weight, (2 min ) 5-80% by weight of a graft copolymer obtained by graft-polymerizing, in the presence of 5-80 parts by weight of a rubbery polymer (II), 95-20 parts by weight of the monomer component (A) [(II) + (A) = 100 parts by weight], the grafting degree of the grafted rubbery polymer contained in the graft copolymer being 30% by weight or more, (3 min ) 0-60% by weight of a styrene polymer obtained by copolymerizing a monomer component (A sec ) consisting of (a sec ) 10-95% by weight of at least one aromatic alkenyl compound, (b sec ) 0-60% by weight of at least one alkenyl cyanide compound, (c sec -1) 0.5-80% by weight of at least one maleimide compound and (c sec -2) 0-80% by weight of at least one other copolymerizable monomer [(a sec ) + (b sec ) + (c sec -1) + (c sec -2) = 100% by weight], and (4 min ) 0-60% by weight of a styrene polymer obtained by copolymerizing the monomer component (A) [(1 min ) + (2 min ) + (3 min ) + (4 min ) = 100% by weight]. Said rubber-reinforced styrene resin composition has excellent matting effect and good physical property balance in respect of heat resistance, processability and impact resistance. </p> |
