Low pressure sheet molding compounds

Details Low pressure sheet molding compounds Low pressure sheet molding compounds

1998-01-30

1999-12-07

Short, Patricia A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523457, 523459, 523510, 523514, 523516, 525 25, 525 28, 525528, 525531, C08L 6310, C08L 6706, C08L 7506

Patent

active

059985100

ABSTRACT:
This invention relates to low pressure sheet molding compounds and, more particularly, to a composition that is moldable at pressures below about 100 psi, said composition being made by combining: (A) an unsaturated prepolymer resin; (B) a monomeric unsaturated polymerizable material containing a terminal ethylene group; (C) a hydroxy-terminated polyester having a molecular weight in the range of about 500 to about 3000; (D) a polyisocyanate; and (E) a polymerization initiator; the mole ratio of NCO groups from (D) to OH groups from (C) being in the range of about 0.1 to about 10.

REFERENCES:
patent: 3873640 (1975-03-01), Owston
patent: 4272619 (1981-06-01), Balle
patent: 4578426 (1986-03-01), Lenz
patent: 5159044 (1992-10-01), Bogner
patent: 5498670 (1996-03-01), Aoyama
patent: 5504151 (1996-04-01), Fisher
patent: 5508315 (1996-04-01), Mushovic
patent: 5521232 (1996-05-01), Gynn

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