Moldable intumescent polyethylene and chlorinated polyethylene compositions
AssigneeGeneral Motors Corporation
InventorsIsmat Ali Abu-Isa, Craig Bryant Jaynes
Life of this patent
Estimating the term…
Abstract
An intumescent thermoplastic elastomer molding composition is disclosed that includes high density polyethylene with chlorinated polyethylene and/or silicone rubber; a heat stabilizer for the thermoplastic elastomer material and an intumescent and fire-resistant additive for the thermoplastic elastomer, whereby moldings prepared from such mixture have good physical properties over a substantial range of ambient temperatures and display a resistance to flame and heat as characterized by the Intumescence Efficiency test of this specification.
Claims6
An intumescent thermoplastic molding which is the molded product of a blended mixture initially comprising on the basis of 100 parts by weight blended mixture:
- 15 to 25 parts high density polyethylene,
- 27 to 33 parts chlorinated polyethylene,
- 5to 10 parts chlorowax,
- 7 to 16 parts of at least one of ammonium dihydrogen phosphate and ammonium polyphosphate,
- 9 to 17 parts of a least one of hydrated aluminum oxide and hydrated magnesium hydroxide,
- 3 to 10 parts of a char former selected from the group consisting of carbohydrates and polyhydric alcohols,
- 1 to 3 parts antimony oxide,
- 5 to 10 parts of a filler selected from the group consisting of glass fibers and mica particles, and
- an anti-oxidant for said polymeric composition.
An intumescent thermoplastic molding which is the molded product of a blended mixture initially comprising on the basis of 100 parts by weight of blended mixture:
- 18 to 23 parts high density polyethylene,
- 24 to 30 parts chlorinated polyethylene,
- 5 to 20 parts silicone rubber,
- 5 to 10 parts chlorowax,
- 5 to 10 parts of at least one of ammonium dihydrogen phosphate and ammonium phosphate,
- 14 to 20 parts of at least one of hydrated aluminum oxide and hydrated magnesium hydroxide,
- 4 to 10 parts of a char former selected from the group consisting of carbohydrates and polyhydric alcohols,
- 5 to 10 parts of a filler selected from the group consisting of glass fibers and mica particles, and
- an anti-oxidant for said polymeric composition.
A moldable mixture for making an intumescent thermoplastic molding, said mixture comprising on basis of a total of 100 parts by weight:
- 15 to 25 parts high density polyethylene,
- 27 to 33 parts chlorinated polyethylene,
- 5 to 10 parts chlorowax,
- 7 to 16 parts of a least one of ammonium dihydrogen phosphate and ammonium polyphosphate,
- 9 to 17 parts of at least one of hydrated aluminum oxide and hydrated magnesium hydroxide,
- 3 to 10 parts of a char former selected from the group consisting of carbohydrates and polyhydric alcohols,
- 1 to 3 parts antimony oxide,
- 5 to 10 parts of a filler selected from the group consisting of glass fibers and mica particles, and
- an anti-oxidant for said polymeric composition.
A moldable mixture for making an intumescent thermoplastic molding, said mixture comprising on the basis of a total of 100 parts by weight:
- 18 to 23 parts high density polyethylene,
- 24 to 30 parts chlorinated polyethylene,
- 5 to 20 parts silicone rubber,
- 5 to 10 parts chlorowax,
- 5 to 10 parts of gas-generating additives comprising at least one of ammonium dihydrogen phosphate and ammonium phosphate,
- 14 to 20 parts of at least one of hydrated aluminum oxide and hydrated magnesium hydroxide,
- 4 to 10 parts of a char former selected from the group consisting of carbohydrates and polyhydric alcohols,
- 5to 10 parts of a filler selected from the group consisting of glass fibers and mica particles, and
- an anti-oxidant for said polymeric composition.
Dependencies are inferred from the claim text.