Compounded unsaturated polyester resin compositions with a reduced monomer content
AssigneeAshland Inc.
InventorsKarri Airola, Paul Mahbub, Eija Valtonen
Life of this patent
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Abstract
A compounded unsaturated polyester resin composition having 10-90 wt % of at least one high viscosity, high molecular weight unsaturated polyester, 10-80 wt % of at least one low viscosity, low molecular weight unsaturated polyester, and 9-30 wt % of at least one monomer. The cone and plate viscosity of the high molecular weight unsaturated polyester is 1 Pas/100° C. to 10 Pas/150° C. and the weight average molecular weight Mw is 1,200 to 10,000. The cone and plate viscosity of the low molecular weight unsaturated polyester is 1 Pas/25° C. to 4 Pas/100° C., and the weight average molecular weight Mw is 400 to 3,000.
Claims20
A compounded unsaturated polyester resin composition, wherein the composition comprises 10-90 wt % of at least one high viscosity, high molecular weight unsaturated polyester, 10-80 wt % of at least one low viscosity, low molecular weight unsaturated polyester and 9-30 wt % of at least one monomer, and that the cone and plate viscosity of the high molecular weight unsaturated polyester is 1 Pas/100° C.-10 Pas/150° C. and the weight average molecular weight Mw is 1,200-10,000, and the cone and plate viscosity of the low molecular weight unsaturated polyester is 1 Pas/25° C.-4 Pas/100° C. and the weight average molecular weight Mw is 400-3,000.
A method for the manufacture of a compounded unsaturated polyester resin composition, wherein 10-90 wt % of at least one high viscosity, high molecular weight unsaturated polyester with a cone and plate viscosity of 1 Pas/100° C. to 10 Pas/150° C. and a weight average molecular weight Mw of 1,200 to 10,000, 10-80 wt % of at least one low viscosity, low molecular weight unsaturated polyester with a cone and plate viscosity of 1 Pas/25° C. to 4 Pas/100° C. and a weight average molecular weight Mw of 400 to 3,000, 9-30 wt % of at least one monomer, 0-5 wt % of a copromoter, 0.1-0.5 wt % of a promoter, and 0.1-0.5 wt % of an amine promoter are compounded together to form said unsaturated polyester resin composition.
Dependencies are inferred from the claim text.