PVC material for car roofs - has up to 10 percent of substance with UV-polymerisable carbonyl double bonds in softener-stabiliser system

摘要

A PVC matl. for car roofs which will not become tacky under the influence of UV in sunlight contg. a softener-stabiliser system, has =10% of substances in the system which posses UV-polymerisable olefinic and/or aromatic carbonyl double bonds, or these double bonds in conjunction with olefinic and/or aromatic bonding systems. Previously 40-60% of such a system has been used. A system may be used which contains no carbonyl double bonds, e.g., ester satd. organic acids or satd. phosphoric acid ester systems.