Polyether dihydroxyalkyl carbamate epoxy additive for epoxy resins
AssigneeTexaco Development Corporation
InventorLee G. Meyer
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Abstract
The adhesion properties of amine-cured epoxy resins are unexpectedly enhanced by addition of certain di-hydroxyalkyl carbamate terminated polyether additives. The adhesively superior epoxy resin composition comprises a vicinal polyepoxide, a curing amount of an amine curing agent, and an effective amount of a polyether dicarbamate having terminal hydroxyalkyl carbamate groups and a molecular weight of from about 2000 to about 3000.
Claims17
An epoxy resin composition having superior adhesion properties and being the cured product of a curable admixture which comprises:
- a vicinal polyepoxide having an epoxide equivalency of greater than 1.8;
- a curing amount of a polyamine curing agent having at least 3 reactive amino hydrogens;
- and,
- an effective amount of an additive consisting essentially of a polyoxyalkylene dicarbamate having terminal dihydroxyalkyl carbamate groups and a molecular weight from about 2000 to about 3000.
A method for increasing the adhesive strength of an epoxy resin composition, being the cured product of a curable admixture comprising a vicinal polyepoxide having an epoxide equivalency of greater than 1.8;
- and, a curing amount of a polyamine curing agent having at least 3 reactive amino hydrogens comprising the step of:
- adding to said curable admixture an effective amount of a polyoxyalkylene dicarbamate additive having a molecular weight of about 2000 to about 3000.
A curable resin composition comprising a diglycidyl ether of 4,4'-isopropylidene bisphenol polyepoxide;
- a curing amount of a primary amine-containing curing agent consisting essentially of a polyoxypropylene diamine having a molecular weight of from about 200 to 250, an accelerator of piperazine and a triethanolamine in a weight ratio of 3 to 7;
- and, an effective amount of a polyoxyalkylene dicarbamate having terminal dihydroxyalkyl carbamate groups and a molecular weight of about 2000.
Dependencies are inferred from the claim text.