Intumescent fire retardant material and article
AssigneeGeneral Electric Company
InventorsRichard D. Pratt, Paul F. Proffitt, George Webb
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Abstract
A silicone resin base fire retardant system having a temperature capability at least to about 450.degree. F (230.degree. C) combines intumescent characteristics with a crusting and charring capability through use of a combination of an oxide of iron and a phosphate of potassium for crusting, along with a charring material such as tripentaerythritol and a blowing agent, such as melamine, in a silicone resin base to allow for adequate expansion.
Claims3
A metallic article of manufacture including a metallic surface having bonded thereto an improved silicone-base intumescent fire retardant material comprising a mixture of:
- 35-75 parts by weight of a silicone resin;
- and
- 22-112 parts by weight of a mixture of ingredients comprising, by weight:
- 1-10 parts of an oxide of iron;
- 17-52 parts of a phosphate of potassium;
- 2-30 parts of a charring material;
- and
- 2-20 parts of a blowing agent.
Dependencies are inferred from the claim text.