Patent · US Expired

Fire resistant thermoplastic silicone vulcanizates

US6433049B1 · kind B1 · utility

19Cited by
9References
15Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 13, 2001
Grant dateAug 13, 2002
Priority date—
Expiry dateJun 13, 2021

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08L2201/02
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

A composition comprising a polyolefin, a polyorganosiloxane having at least two alkenyl groups per molecule, and calcium silicate where the polyorganosiloxane is cured after mixing using an organohydrido silicon compound and a hydrosilation catalyst to create a thermoplastic vulcanizate, provides excellent fire resistance. In particular such compositions when tested by burning at 40 to 88 kW/m2 external flux generate significantly less heat and smoke, and generate tougher chars compared to polyolefins alone, or mixtures of thermoplastic polyolefin resin, polyorganosiloxane and calcium silicate where the composition is not cured after mixing.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.