Foamable polyvinyl halogenated resin mass, use of polymerizates

Details Foamable polyvinyl halogenated resin mass, use of polymerizates Foamable polyvinyl halogenated resin mass, use of polymerizates

1998-10-19

2000-03-28

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521145, C08J 900

Patent

active

060432934

ABSTRACT:
There are provided foamable, foamable polyvinyl halide resin masses containing: A) 1 to 25 parts relative to 100 parts of polyvinyl halide, of a polymerizate obtainable through the emulsion polymerization of i) up to 20 to not more than 75 parts of methylmethacrylate, ii) 25 to 80 parts of one or more C.sub.2 -C.sub.18 alkylmethacrylates, iii) 0 to 5 parts of one or more vinyl unsaturated monomers copolymerizable with (i) and/or (ii, wherein the components (i)-(iii) together yield 100 parts and are polymerized with up to a further 100 parts of usual additives for emulsion polymerization, wherein the emulsion polymerizate is single stepped and has a viscosity number of >700 cm.sup.3 /g and wherein copolymers are excluded which contain iv) MMA per se, or less than 20 or more than 75 parts of MMA together with either v) one or more acrylic acid esters, and/or vi) ethyl methacrylate, n-butyl-methacrylate, or ethylhexyl methacrylate. The resin mass further includes: B) 0.1-10 parts based on 100 parts of the polyvinyl halide of one or more foaming materials, C) 0-100 parts based on 100 parts polyvinyl halide of the usual additives. This polyvinyl halide resin mass, after foaming, yields a resin mass which, as well as of good surface properties, has a foam density of <0.7 g/cm.sup.3.

REFERENCES:
patent: 2808387 (1957-10-01), Parks et al.
patent: 3975315 (1976-08-01), Parks
patent: 5710188 (1998-01-01), Beekman et al.
patent: 5786399 (1998-07-01), Beekman et al.

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