| 摘要 |
<p>A processing aid for vinyl chloride resins which can prevent air marks and flow marks in sheeting such resins. This aid is a copolymer mixture which comprises 2 to 95 parts by weight of a graft copolymer prepared by grafting a monomer mixture mainly comprising a methacrylic ester monomer and an aromatic vinyl monomer onto a butadiene rubbery polymer and 5 to 98 parts by weight of a copolymer prepared by polymerizing (not grafting) the monomer mixture alone and has a butadiene rubbery polymer content of 1 to 30 parts by weight.</p> |
