申请人:Westinghouse Electric Corp.
公开号:US04173593A1
公开(公告)日:1979-11-06
An epoxy-styrene, solventless resin impregnating varnish, having an atmospheric catalyzed pot life at room temperature of at least 45 days, is made by mixing: (1) the product of the reaction of (a) 1 part of an epoxy resin mixture, comprising solid epoxy resin and liquid epoxy resin wherein the weight ratio of solid epoxy: liquid epoxy is between 1:1 to 1:10; with (b) between about 0.01 part to 0.06 part of maleic anhydride and (c) a catalyst under such conditions that the epoxy diester formed has an acid number of between about 0.5 to 3.0; with (2) a coreactive vinyl monomer; and between about 0.0003 part to 0.004 part of a room temperature stabilizer; (3) between about 0.3 part to 1.2 part of a polycarboxylic anhydride, which is soluble in the mixture of (1) and (2), and an amount of free radical catalyst that is effective to provide a catalytic effect on the impregnating varnish and to cure it at temperatures of over about 85.degree. C., and with (4) between 0.0005 part to 0.005 part of a metal acetylacetonate, selected from the group consisting of chromium (III) acetylacetonate, manganese (III) acetylacetonate, ferric (iron III) acetylacetonate, zinc (II) acetylacetonate, aluminum (III) acetylacetonate, sodium (I) acetylacetonate, uranyl (VI) acetylacetonate, and mixtures thereof, acting as latent accelerator.
一种环氧基苯乙烯无溶剂浸渍清漆,具有在室温下至少45天的大气催化潽动期,其制备方法为混合:(1)反应产物,其中(a) 1份环氧树脂混合物,包括固态环氧树脂和液态环氧树脂,其中固态环氧树脂:液态环氧树脂的重量比为1:1至1:10; (b)约0.01份至0.06份马来酸酐和(c)催化剂,在这种条件下,环氧二酯的酸值在0.5至3.0之间;(2)一种共反应的乙烯基单体;和约0.0003份至0.004份室温稳定剂;(3)约0.3份至1.2份可溶于(1)和(2)混合物中的多羧酸酐,以及足以在85°C以上的温度下对浸渍清漆产生催化效果并使其固化的自由基催化剂量; (4)约0.0005份至0.005份金属乙酰丙酮酸盐,选自铬(III)乙酰丙酮酸盐、锰(III)乙酰丙酮酸盐、铁(III)乙酰丙酮酸盐、锌(II)乙酰丙酮酸盐、铝(III)乙酰丙酮酸盐、钠(I)乙酰丙酮酸盐、铀酰(VI)乙酰丙酮酸盐和其混合物,作为潜在的加速剂。