Thermosets from water-extended polyetherester emulsions
AssigneeArco Chemical Technology, L.P.
InventorsGangfeng Cai, Shau-Hua Guo, Lau S. Yang
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Abstract
Stable emulsions based on unsaturated polyetherester resins are disclosed. The emulsions have high stability compared with conventional emulsions that are based on unsaturated polyester resins. The invention includes base-stabilized emulsions, as well as emulsions containing fillers or functional additives. The emulsions, which are storage stable for weeks or months, are useful for making water-extended polyetherester thermosets having excellent physical properties, even at high water contents.
Claims23
A water-extended polyetherester thermoset which comprises the reaction product of:
- (a) a stable water-in-resin emulsion which comprises a continuous phase and water droplets emulsified within the continuous phase;
- wherein the continuous phase includes from about 20 to about 80 wt. % of a vinyl monomer, and from about 20 to about 80 wt. % of an unsaturated polyetherester resin, both amounts based on the amount of continuous phase;
- wherein the unsaturated polyetherester resin is made by reacting a polyether and an anhydride or dicarboxylic acid in the presence of a catalyst effective to promote insertion of the anhydride or dicarboxylic acid into carbon-oxygen bonds of the polyether to produce the unsaturated polyetherester resin;
- and wherein the water droplets comprise from about 20 to about 70 wt. % of the emulsion;
- and
- (b) a catalyst system which comprises a free-radical initiator and a transition-metal catalyst.
A water-extended polyetherester thermoset which comprises the reaction product of:
- (a) a stable water-in-resin emulsion which comprises a continuous phase and water droplets emulsified within the continuous phase;
- wherein the continuous phase includes from about 50 to about 70 wt. % of a vinyl monomer, and from about 30 to about 50 wt. % of an unsaturated polyetherester resin, both amounts based on the amount of continuous phase;
- wherein the unsaturated polyetherester resin is made by reacting a polyether and an anhydride or dicarboxylic acid in the presence of a catalyst effective to promote insertion of the anhydride or dicarboxylic acid into carbon-oxygen bonds of the polyether to produce the unsaturated polyetherester resin;
- and wherein the water droplets comprise from about 20 to about 70 wt. % of the emulsion;
- and
- (b) a catalyst system which comprises a free-radical initiator and a transition-metal catalyst.
A water-extended polyetherester thermoset which comprises the reaction product of:
- (a) a stable water-in-resin emulsion which comprises a continuous phase and water droplets emulsified within the continuous phase;
- wherein the continuous phase includes from about 50 to about 70 wt. % of styrene, and from about 30 to about 50 wt. % of an unsaturated polyetherester resin, both amounts based on the amount of continuous phase;
- wherein the unsaturated polyetherester resin is made by reacting a polyether and an anhydride or dicarboxylic acid in the presence of a catalyst effective to promote insertion of the anhydride or dicarboxylic acid into carbon-oxygen bonds of the polyether to produce the unsaturated polyetherester resin;
- and wherein the water droplets comprise from about 40 to about 65 wt. % of the emulsion;
- and
- (b) a catalyst system which comprises a free-radical initiator and a transition-metal catalyst.
Dependencies are inferred from the claim text.