Method of forming a polyester preimpregnated fiberglass sheet

Details Method of forming a polyester preimpregnated fiberglass sheet Method of forming a polyester preimpregnated fiberglass sheet

B - Operations, Transporting

32

B

117/109, 154/89,

B32B 17/04 (2006.01) C08J 5/24 (2006.01)

Patent

CA 1040490

A METHOD OF FORMING A POLYESTER PREIMPREGNATED FIBERGLASS SHEET Abstract of the Disclosure A polyester composition, having about 30 to 65 weight percent flame resistant filler, about 0.2 to 5 weight percent of a thickening agent and an amount of hardener effective to catalyze the composition at temperatures over about 100°C, is coated onto and compacted into a fiber mat at about room temperature, to a weight ratio of filled polyester: fiber mat of about 3:1 to 1:1; and allowed to thicken for at least 4 hours so that its viscosity is over 10,000,000 cps at 25°C to provide a polyester preimpregnated fibrous sheet.

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