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US 4,544,685 AGranted
Insulation jacketing material
AssigneeManville Service Corporation
InventorRobert J. Hoelzer
Life of this patent
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Abstract
A composition having excellent anti-smoke properties and useful as a jacketing for pipe insulation and the such is provided. The composition can be thermoformed into an insulation jacketing product having a high delayed ignition time, a smoke development rating of 50 or less, and a flame spread rating of 25 or less as measured by ASTM E84.
Claims10
A composition useful as an insulation jacketing material having excellent anti-smoke properties comprising the following ingredients:
- (a) about 54-60 wt% polyvinyl chloride resin having an Inherent Viscosity of from about 0.70-1.09 as measured by ASTM D 1243;
- (b) about 1.5-4 wt% of at least one heat stabilizer;
- (c) about 0.5-4.5 wt% of at least one lubricant;
- (d) about 6-8 wt% chlorinated polyethylene;
- (e) about 8-10 wt% titanium dioxide;
- (f) about 18-20.5 wt% of at least one compound selected from the group consisting of (i) ground aluminum hydroxide and (ii) ground magnesium hydroxide wherein said compound is surface treated with a fatty acid;
- and
- (g) about 3-4 wt% molybdenum trioxide.
5 more elements
A composition having excellent anti-smoke properties consisting essentially in weight percent the following ingredients:
- (a) about 57 wt% polyvinylchloride resin having an Inherent Viscosity of from about 0.70 to 1.09 as measured by ASTM D 1243;
- (b) about 1.9 wt% butyl tin mercaptide;
- (c) about 1.2 wt% epoxidized soybean oil;
- (d) about 0.9 wt% calcium stearate;
- (e) about 0.4 wt% Esterified Montan Wax;
- (f) about 0.1 wt% polyethylene wax;
- (g) about 8.6 wt% titanium dioxide;
- (h) about 7.1 wt% nominal 36 percent Cl polyethylene;
- (i) about 3.4 wt% molybdenum trioxide;
- and
- (j) about 19.4 wt% ground Al(OH).sub.3 surface treated with stearic acid.
8 more elements
Dependencies are inferred from the claim text.