Rigid polyvinyl chloride foam

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

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264 53, 521 75, 521 79, 521 81, 521145, 521 98, C08J 914

Patent

active

044342527

ABSTRACT:
New rigid polyvinyl chloride foam having a density of less than 200 kg/m.sup.3 and having a uniform, fine-celled cell-structure consisting of a rigid vinyl chloride homopolymer containing per 100 parts by weight of polyvinyl chloride 0.1-15 parts by weight of a homo- or copolymer of an alkyl methacrylate having an alkylgroup of 1-10 carbon atoms having a viscosity of the solution .eta..sub.0.1 of between 1.times.10.sup.-6 and 4.times.10.sup.-6 m.sup.2 /s measured at 293 K in 1,2 dichloro ethylene and a method for the preparation of such a new rigid polyvinyl chloride foam.

REFERENCES:
patent: 3879313 (1975-04-01), Huntzinger et al.
patent: 3975315 (1976-08-01), Parks
patent: 4025465 (1977-05-01), Dorrn et al.

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