| 摘要 |
A polymer composition comprises: polymeric material of which at least one third is constituted by homopolymer or copolymer of vinylchloride; five to one hundred in parts per hundred parts of total polymer of a plasticiser selected from the organic esters of formula <CHEM> in which R<1> is selected from the lower (meaning up to C20) alkyl groups; R<2> is selected from H, the lower alkyl and lower acyl groups; and R<3> and R<4> are independently selected from H, OH, lower alkyl groups, and lower acyloxy groups, such group (in every case) optionally having one or more than one substituent selected from lower alkyl groups, lower acyl groups and lower acyloxy groups; and effective amounts of at least one stabiliser and at least one smoke suppressant. The plasticisers produce a synergistic smoke suppressant effect with most commercially available smoke suppressants. |
