Back to results
US 4,049,747 AGranted
Crosslinked vinyl halide polymers as flame retardant additives for thermoplastics
AssigneeStauffer Chemical Company
InventorsJung Il Jin, Paul Kraft
Life of this patent
Estimating the term…
Abstract
There are disclosed fire retardant polyblends comprising thermoplastic polymers intimately admixed with a crosslinked copolymer of a vinyl halide, preferably a crosslinked vinyl chloride copolymer. These fire retardant polyblends may be utilized in a variety of coating, impregnating and especially molding applications wherein it is desired to provide fire retardancy to the resulting end product.
Claims13
A fire retardant polyblend comprising an intimate admixture of at least one polyurethane resin;
- and an effective flame retarding concentration of at least one crosslinked copolymer of:
- (1) at least one vinyl halide selected from the group consisting of vinyl chloride, vinyl bromide and vinyl fluoride present in a concentration of from 50-99% by weight and (2) at least one polyfunctional ethylenically unsaturated monomer, present in a concentration of from about 1-50% by weight.
A fire retardant polyblend comprising an intimate admixture of at least one polyurethane resin;
- and an effective flame retarding concentration of a crosslinked copolymer of from about 50-99% by weight, of vinyl chloride and from about 1-50%, by weight of a polyfunctional ethylenically unsaturated monomer.
Dependencies are inferred from the claim text.