UV curable high tensile strength resin composition
First Claim
1. A resin composition containing no non-reactive solvent comprising(A) a polyester that comprises the reaction product of(1) polyhydroxy compound having at least three hydroxyl groups, and(2) aromatic compound that is at least difunctional in a group selected from acid, anhydride, ester, and mixtures thereof, where the proportion of said polyhydroxy compound to said aromatic compound is selected so that said polyester has about 150 to about 250 mole % excess hydroxyl groups;
- (B) an acrylate urethane in about stoichiometric proportion with said polyester up to about 10% excess polyester over stoichiometric, where said acrylate urethane comprises the reaction product of(1) hydroxy acrylate having a single hydroxyl group; and
(2) diisocyanate, said hydroxy acrylate being equimolar ±
10 mole % with said diisocyanate; and
(C) liquid acrylate reactive diluent sufficient to give said resin composition a viscosity of less than 5000 cps.
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Accused Products
Abstract
Disclosed is a resin composition which comprises a mixture of a polyester, an acrylate urethane, in about stoichiometric proportion with the polyester up to about 10% excess polyester over stoichiometric, and a liquid acrylate reactive diluent sufficient to give the resin composition the viscosity of less than 5,000 centipoise. The polyester resin is the reaction product of a polyhydroxy compound having at least three hydroxyl groups, and an aromatic compound that is at least difunctional in acid, anhydride, or ester groups, where the proportion of the polyhydroxy compound to the aromatic compound is such that the polyester has about 150 to about 250 mole % excess hydroxyl groups. The acrylate urethane compound is the reaction product of a hydroxy acrylate and an isocyanate having at least two isocyanate groups, where the hydroxy acrylate and a hydroxy acrylate having a single hydroxyl group are equimolar (when a diisocyanate is used) with the isocyanate ±10 mole %. Also disclosed is a method of making the resin composition.
35 Citations
32 Claims
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1. A resin composition containing no non-reactive solvent comprising
(A) a polyester that comprises the reaction product of (1) polyhydroxy compound having at least three hydroxyl groups, and (2) aromatic compound that is at least difunctional in a group selected from acid, anhydride, ester, and mixtures thereof, where the proportion of said polyhydroxy compound to said aromatic compound is selected so that said polyester has about 150 to about 250 mole % excess hydroxyl groups; -
(B) an acrylate urethane in about stoichiometric proportion with said polyester up to about 10% excess polyester over stoichiometric, where said acrylate urethane comprises the reaction product of (1) hydroxy acrylate having a single hydroxyl group; and (2) diisocyanate, said hydroxy acrylate being equimolar ±
10 mole % with said diisocyanate; and(C) liquid acrylate reactive diluent sufficient to give said resin composition a viscosity of less than 5000 cps. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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20. A composition containing no non-reactive solvent comprising
(A) a polyester that comprises the reaction product of (1) tris(2-hydroxy ethyl)isocyanurate; - and
(2) an aromatic compound that is difunctional in a group selected from acid, anhydride, ester, and mixtures thereof, where the proportion of said polyhydroxy compound to said aromatic compound is selected so that said polyester has about 150 to about 250 mole % excess hydroxyl groups; (B) an acrylate urethane in about stoichiometric proportion with said polyester up to about 10% excess polyester over stoichiometric, where said acrylate urethane comprises the reaction product of (1) hydroxy acrylate having a single hydroxyl group and a single acrylate group; and (2) an aromatic diisocyanate, said hydroxy acrylate being equimolar ±
10 mole % with said isocyanate;(C) about 20 to about 60% by weight, based on total composition weight, of a liquid acrylate reactive diluent having at least two acrylate groups and a viscosity of less than 1000 cps; (D) about 0.005 to about 0.5% by weight of an inhibitor; (E) about 1 to about 5 phr of a UV photoinitiator; and (F) up to about 50% by weight, based on total composition weight, of a filler that is transparent to UV light.
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21. A method of making a resin composition containing no non-reactive solvent comprising
(1) preparing a first composition which comprises (a) polyhydroxy compound having at least three hydroxyl groups; -
(b) aromatic compound that is at least difunctional in a group selected from acid, anhydride, ester, and mixtures thereof, where the proportion of said polyhydroxy compound to said aromatic compound is selected so that the hydroxyl functionality is abut 150 to about 250 mole % in excess of stoichiometric; and (c) sufficient amount of an esterification catalyst; (2) heating said first composition to produce a polyester; (3) preparing a second composition which comprises (a) a hydroxy acrylate having a single hydroxyl group; and (b) diisocyanate, said hydroxy acrylate being equimolar ±
10 mole % with said diisocyanate;(4) allowing said second composition to exotherm to produce an acrylate urethane; (5) preparing a resin composition which comprises (a) said polyester; (b) said acrylate urethane in an amount from about stoichiometric with said polyester to about 10% excess of said polyester over stoichiometric; (c) liquid acrylate reactive diluent sufficient to give said resin composition a viscosity of less than 5000 cps.
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22. A transformer coil coated with a resin composition containing no non-reactive solvent which comprises:
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(A) a polyester that comprises the reaction product of (1) polyhydroxy compound having at least three hydroxyl groups, and (2) aromatic compound that is at least difunctional in a group selected from acid, anhydride, ester, and mixtures thereof, where the proportion of said polyhydroxy compound to said aromatic compound is selected so that said polyester has about 150 to about 250 mole % excess hydroxyl groups; (B) an acrylate urethane in about stoichiometric proportion with said polyester up to about 10% excess polyester over stoichiometric, where said acrylate urethane comprises the reaction product of (1) hydroxy acrylate having a single hydroxyl group; and (2) diisocyanate, said hydroxy acrylate being equimolar ±
10 mole % with said diisocyanate; and(C) liquid acrylate reactive diluent sufficient to give said resin composition a viscosity of less than 5000 cps.
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Specification
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- Resources
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Current AssigneeABB Power T&D Limited (ABB Limited)
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Original AssigneeWestinghouse Electric Company LLC (Brookfield Asset Management Incorporated)
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InventorsSu, Wei-Fang A.
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Primary Examiner(s)Bleutge, John C.
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Assistant Examiner(s)Short, Patricia
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Application NumberUS06/699,373Time in Patent Office621 DaysField of Search525/28, 525/21, 204/159.19, 204/159.14, 523/527, 522/43, 522/93, 522/44US Class Current522/43CPC Class CodesC08F 283/02 on to polycarbonates or sat...C08G 18/42 Polycondensates having carb...C08G 18/4208 containing aromatic groupsC08G 18/4661 containing three nitrogen a...C08G 18/672 Esters of acrylic or alkyl ...C08L 75/04 PolyurethanesC09D 167/00 Coating compositions based ...
