Synthetic resin product and method and apparatus for manufacture

Details Synthetic resin product and method and apparatus for manufacture Synthetic resin product and method and apparatus for manufacture

1983-12-30

1986-02-04

Lesmes, George F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Noninterengaged fiber-containing paper-free web or sheet...

428324, 428325, 428330, 264255, 264308, 264309, B32B 508

Patent

active

045686041

ABSTRACT:
A filler which imparts heat dissipating and shrinkage reduction characteristics to a mixture of the filler with a synthetic resin. The mixture is useful for providing a layer between gel coat and a layer including glass fiber and resin to prevent the formation of small air voids. The filler imparts structural strength to resin so that a useful product may be made from only a layer of gel coat with a layer of the filler and resin. The filler is preferably a mixture of calcium silicate and mica, and in the preferred embodiment the calcium silicate is wollastonite. An improved apparatus for applying the mixture of synthetic resin and filler comprises a modified prior-art spray gun and a mixer which includes a plurality of augers for thoroughly mixing the filler with the resin. The preferred embodiment of the resin comprises a terpolymer mixed with styrene and having a Brookfield thixatropic index of from 2 to 4.

REFERENCES:
patent: 3396067 (1968-08-01), Schafer
patent: 4244993 (1981-01-01), Platka, III et al.
patent: 4247364 (1981-01-01), Culp
patent: 4267285 (1981-05-01), Brontman
patent: 4369224 (1983-01-01), Cordts et al.
patent: 4374892 (1983-02-01), Roberts
patent: 4463041 (1984-07-01), Takuji et al.
patent: 4486494 (1984-12-01), Eldin
The Merck Index (1976), p. 215, #1705.

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