公开(公告)号：US3919348A

公开(公告)日：1975-11-11

申请号：US47275474

申请日：1974-05-23

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： FOSTER NEWTON C ,  SMITH JAMES D B

IPC: C08F2/00 ,  C08F2/44 ,  C08F290/00 ,  C08F299/00 ,  C08G59/00 ,  C08G59/22 ,  C08G59/38 ,  C08G59/40 ,  C08G59/42 ,  C08K5/32 ,  C08L63/00 ,  C08L63/10 ,  C09D163/10 ,  H01B3/40

CPC classification number: H01B3/40 ,  C08G59/226 ,  C08G59/38 ,  C08G59/4207 ,  C08K5/32 ,  C08L63/10

Abstract: 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 having an epoxy equivalent weight of between about 390-2500 and liquid epoxy resin having an epoxy equivalent weight of between about 100-385, wherein the weight ratio of solid epoxy: liquid epoxy is between 1:1 to 1:10; with (b) between about 0.01 to 0.06 part of maleic anhydride and (c) between about 0.0001 to 0.005 part of a catalyst selected from the group consisting of piperidine, pyridine, imidazoles, and aliphatic tertiary amines; under such conditions that the reaction between the maleic anhydride and the epoxy resin mixture is substantially complete, and 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 0.00030 to 0.004 part of an aromatic acidic phenolic compound, selected from the group consisting of dinitrophenols and trinitrophenols; and finally with (3) between about 0.3 to 1.2 part of a polycarboxylic anhydride, which is soluble in the mixture of (1) and (2) at temperatures between about 0* to 35*C, and an amount of free radical catalyst selected from azo compounds and peroxides that is effective to provide a catalytic effect on the impregnating varnish to cure it at temperatures over about 85*C. Upon heating at a temperature over about 85*C, the impregnating composition cures to a thermoset resin.

Abstract translation: 通过混合（1）将（a）1份环氧树脂混合物的反应产物（包括固体）反应，制备环氧 - 苯乙烯无溶剂树脂浸渍清漆，其室温至少45天具有大气催化适用期 环氧当量为约390-2500的环氧树脂和环氧当量为约100-385之间的环氧树脂，其中固体环氧树脂：液体环氧树脂的重量比为1:1至1:10; （b）约0.01至0.06份马来酸酐和（c）约0.0001至0.005份选自哌啶，吡啶，咪唑和脂族叔胺的催化剂; 在马来酸酐和环氧树脂混合物之间的反应基本上完成的条件下，形成的环氧二酯的酸值在约0.5-3.0之间; 与（2）共聚活性乙烯基单体和约0.00030至0.004份选自二硝基苯酚和三硝基苯酚的芳族酸性酚类化合物; 最后用（3）在约0〜35℃的温度下可溶于（1）和（2）的混合物中的约0.3-1.2份的多元羧酸酐与一定量的选自自由基催化剂 来自偶氮化合物和过氧化物，其有效地在浸渍漆上提供催化作用以在约85℃的温度下固化。在约85℃的温度下加热时，浸渍组合物固化成热固性树脂。

公开(公告)号：US3868613A

公开(公告)日：1975-02-25

申请号：US36175373

申请日：1973-05-18

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： ROGERS JR DOW A ,  SMITH JAMES D B

IPC: C08G59/22 ,  C08G59/38 ,  C08G59/42 ,  H01B3/40 ,  H02K3/30 ,  H01F27/32 ,  B32B19/00

CPC classification number: H01B3/40 ,  C08G59/226 ,  C08G59/38 ,  C08G59/42 ,  H02K3/30 ,  Y10T428/251 ,  Y10T428/31525 ,  Y10T428/31529 ,  Y10T428/3175

Abstract: A resinous composition, suitable as a solventless impregnating resin for large rotating apparatus insulation, is made from a mixture containing about 85 to 115 parts of a bisphenol A or novolac glycidyl ether epoxy resin, about 100 to 155 parts of an acid anhydride and about 25 to 95 parts of a diglycidyl ether of neopentyl glycol.