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.

Abstract: The invention relates to copolymers for producing cast glass or thermally dimensionally stable formed materials.

Abstract: A method for lowering the residual monomer content of non-vitrified processing aids for thermoplastic polymers involves subjecting an emulsion polymerizate containing methylmethacrylate and, optionally, up to 50% by weight of a comonomer to a post-catalysis step to reduce the residual monomer content followed by a spray-drying step where the residual monomer content is further reduced. The spray-drying step is performed at an exit temperature which is either above the boiling point of methylmethacrylate or if an optional comonomer is present which has a higher boiling point than methacrylate, at a temperature above the boiling point of the comonomer. The resulting product which is suitable for use as a non-vitrified processing aid has a residual monomer content of 100 ppm or less. The processing aid can be used with thermoplastics to form containers, e.g., beverage bottles of PVC, which would not adversely affect odor or taste of the contained food product.

Abstract: A light-admitting plastic sheet component is used for rigid roofing. PVC or PC is chosen as the material for the plastic sheet, and the side not exposed to weathering is coated with a non-combustible material that is resistant to flying sparks and radiant heat.