Thermoplastic mixtures suitable for foaming in the extrusion or

Details Thermoplastic mixtures suitable for foaming in the extrusion or Thermoplastic mixtures suitable for foaming in the extrusion or

1974-05-21

1976-03-16

Briggs, Sr., Wilbert J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25E, 260 25P, 260 25H, 260 25HA, 260 23XA, 260 285D, 260 291SB, 260 4249, 260 4575J, 260 4575V, 260876R, 260891, 260897C, 260898, 260899, 264 54, C08J 910, C08L 2706

Patent

active

039445089

ABSTRACT:
Thermoplastic mixtures suitable for foaming in the extrusion or injection molding process consisting of polymerizate mixtures of (A) from 50 to 95% by weight of a vinyl chloride polymerizate prepared by free-radical polymerization selected from the group consisting of (1) bulk polymerization and (2) emulsion and suspension polymerization with continuous agitation, of vinyl chloride containing up to 20% by weight of ethylenically-unsaturated monomers copolymerizable with vinyl chloride and (B) from 5 to 50% by weight of a vinyl chloride polymerizate prepared by polymerization of a stable, aqueous monomeric dispersion of vinyl chloride containing up to 20% by weight of ethylenically-unsaturated monomers copolymerizable with vinyl chloride prehomogenized in the presence of emulsifiers and oil-soluble catalysts, and a foaming agent.

REFERENCES:
patent: 3595848 (1971-07-01), Reinecke et al.
patent: 3706679 (1972-12-01), Hopton et al.
patent: 3766106 (1973-10-01), Yurimoto et al.

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