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US 4,853,154 AGranted
Low smoke polypropylene insulation compositions
AssigneeShell Oil Company
InventorsRonald D. Icenogle, Lie K. Djiauw
Life of this patent
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Abstract
This invention relates to a resin composition comprising polypropylene, a hydrogenated mono alkylarene-conjugated diene block copolymer, oil, and a filler which has been treated with a coupling agent, which can be blended to form a self-extinguishing, low smoke and halogen free insulation composition which exhibits high ultimate elongation and is relatively easy to process.
Claims11
An electrically conductive wire extrusion coated with a flame retardant insulation composition comprising:
- (a) 15-20 percent by weight of a hydrogenated styrene-butadiene-styrene block copolymer;
- (b) 4-8 percent by weight of a plasticizer;
- (c) 4-8 percent by weight of polypropylene;
- (d) 63-75 percent by weight of a hydrated magnesium hydroxide which has been surface treated with a coupling agent, wherein the magnesium hydroxide has a mean particle size of about 0.6 to about 1.2 microns and a crystallite aspect ratio greater than 4.
1 more element
The wire of claim 3 wherein the functional group is maleic anhydride.
Dependencies are inferred from the claim text.