Back to results
US 4,732,922 AGranted
Flame retardant polyethylene terephthalate compositions
AssigneeMobay Corporation
InventorsGeorge R. Kriek, Mark W. Witman
Life of this patent
Estimating the term…
Abstract
Flame resistant, reinforced thermoplastic molding compositions based on polyethylene terephthalate resins were found to have a lowered tendency to drip during burning upon the addition thereto of a sufficient amount of a particular ionic elastomer. The addition of the drip suppressant in accordance with the invention does not compromise the physical and mechanical properties of the composition.
Claims4
A reinforced thermoplastic molding composition comprising:
- a flame retarded polyethylene terephthalate resin having an intrinsic viscosity of at least 0.3 deciliters per gram measured as a 0.5% by weight solution in a 1:1 mixture of phenol and tetrachloroethane at 25.degree. C. and containing at least a sufficient amount of a flame retardant agent to display a flammability rating of V2 at 1/16" in accordance with UL-94,
- (b) between about 5 and about 50 weight percent of a reinforcing filler, and
- (c) between 1.5 and 5 weight percent of a metal salt of a sulfonated EPDM rubber,
- said weight percent of said (b) and said weight percent of (c) being in relation to the weight of said (a).
1 more element
Dependencies are inferred from the claim text.