Thermosetting epoxy resin powder highly filled with barium sulfate, calcium carbonate and mica

Claim 2

AN EPOXY RESIN COMPOSITION THAT CAN BE PULVERIZED TO PROVIDE A FREE-FLOWING POWDER WHICH IS SHELF-STABLE AND WHEN HEATED TO 175*-250*C IN CONTACT WITH A METAL ARTICLE TEMPORARILY SOFTENS AND THEN GELS AND CURES TO PROVIDE A TOUGH PROTECTIVE COATING, SAID COMPOSITION COMPRISING A HOMOGENEOUS BLEND OF A POLYGLYCIDYL ETHER OF POLYHYDRIC PHENOL HAVING A SOFTENING POINT OF 70*-120*C, 0.6-1.5 EQUIVALENTS PER EPOXIDE EQUIVALENT OF THE POLYGLYCIDYL ETHER OF A DIHYDRAZIDE OF THE FORMULA

Claim 3

An epoxy resin composition as defined in claim 1 and comprising at least

Claim 4

An epoxy resin composition as defined in claim 2 and comprising 15-25%

Claim 5

An epoxy resin composition as defined in claim 2 and comprising 15-25%

Claim 6

A molded article comprising the reaction product of an epoxy resin mixture consisting essentially of epoxidized cresol novolac resin and epoxidized aminophenol resin and an effective amount of a mixed curing agent therefor, said curing agent consisting essentially of A. from 1-15% of the epoxy equivalents of aromatic dicyanate selected from a group consisting of bisphenol A dicyanate and bisphenol B dicyanate and B. an effective amount of dicyandiamide curing agent sufficient to cure said resin to a hard cured product,

Claim 7

A molded article comprising the reaction product of an epoxy resin mixture consisting essentially of epoxidized cresol novolac resin and epoxidized aminophenol resin and an effective amount of a mixed curing agent therefor, said curing agent consisting essentially of A. from 1-15% of the epoxy equivalents of aromatic dicyanate selected from a group consisting of bisphenol A dicyanate and bisphenol B dicyanate and B. an effective amount of dicyandiamide curing agent sufficient to cure said resin to a hard cured product,

Claim 8

The molded article of claim 4 wherein said composition additionally

Claim 9

An epoxy resin composition as defined in claim 1 wherein R is a divalent

Claim 10

An epoxy resin composition as defined in claim 1 wherein the

Claim 11

A self-supporting laminating adhesive sheet comprising supporting fabric and the reaction product of an epoxy resin mixture consisting essentially of epoxidized cresol novolac resin and epoxidized aminophenol resin and an effective amount of a mixed curing agent therefor, said curing agent consisting essentially of A. from 1-15% of the epoxy equivalents of aromatic dicyanate selected from a group consisting of bisphenol A dicyanate and bisphenol B dicyanate and B. an effective amount of dicyandiamide curing agent sufficient to cure said resin to a hard cured product,

Claim 12

A self-supporting laminating adhesive sheet comprising supporting fabric and the reaction product of an epoxy resin mixture consisting essentially of epoxidized cresol novolac resin and epoxidized aminophenol resin and an effective amount of a mixed curing agent therefor, said curing agent consisting essentially of A. from 1-15% of the epoxy equivalents of aromatic dicyanate selected from a group consisting of bisphenol A dicyanate and bisphenol B dicyanate and B. an effective amount of dicyandiamide curing agent sufficient to cure said resin to a hard cured product,

Claim 13

In an epoxy resin composition comprising a homogeneous blend of a polyglycidyl ether of polyhydric phenol having a softening point of 70.degree.-120.degree.C, a dihydrazide of the formula

Claim 14

In an epoxy resin composition comprising a homogeneous blend of a polyglycidyl ether of polyhydric phenol having a softening point of 70.degree.-120.degree.C, a dihydrazide of the formula

Claim 15

The composition of claim 7 wherein said fabric is a glass scrim cloth.

Claim 16

A flexible sheet material comprising a homogeneous curable epoxy resin composition and fibers, said curable composition comprising an epoxy resin mixture consisting essentially of epoxidized cresol novolac resin and epoxidized aminophenol resin and an effective amount of a mixed curing agent therefor consisting essentially of A. from 1-15% of the epoxy equivalents of aromatic dicyanate selected from a group consisting of bisphenol A dicyanate and bisphenol B dicyanate and B. an effective amount of dicyandiamide curing agent sufficient to cure said resin to a hard cured product,

Claim 17

A flexible sheet material comprising a homogeneous curable epoxy resin composition and fibers, said curable composition comprising an epoxy resin mixture consisting essentially of epoxidized cresol novolac resin and epoxidized aminophenol resin and an effective amount of a mixed curing agent therefor consisting essentially of A. from 1-15% of the epoxy equivalents of aromatic dicyanate selected from a group consisting of bisphenol A dicyanate and bisphenol B dicyanate and B. an effective amount of dicyandiamide curing agent sufficient to cure said resin to a hard cured product,

Claim 18

The sheet of claim 10 additionally containing a layer of glass cloth.

Claim 19

The sheet of claim 9 wherein said fibers are graphite.