Dry, moldable and stable unsaturated polyester resin paste

Details Dry, moldable and stable unsaturated polyester resin paste Dry, moldable and stable unsaturated polyester resin paste

C - Chemistry, Metallurgy

08

L

400/5704

C08L 67/06 (2006.01) C08J 3/12 (2006.01) C08K 3/22 (2006.01)

Patent

CA 1055638

ABSTRACT OF THE DISCLOSURE There is provided an improved process for preparing an unsaturated polyester resin in the form of a dry moldable, transparent and non-sticky paste having a shelf life of up to six months, which comprises mechanically breaking up an unsatu- rated polyester gel containing an initiator effective at a temperature of at least 80°C. into finely divided gel particles thereby to disrupt the polymerization process of the gel, adding to said finely divided gel an amount of up to 50 parts per hundred of an unpolymerized unsaturated polyester resin containing an oxide or hydroxide of a metal of Group II and an initiator effective at a temperature of at least 80°C, and after mixing allowing said mixture to stand so as to mature at a temperature of from 35 to 80°C. for a period of from 2 to 4 days.

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