Phenyl urea epoxy resin accelerator
AssigneeShell Oil Company
InventorsTony Harrison, Roger G. Weatherhead
Life of this patent
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Abstract
A process for preparing cured epoxy resins, the cured epoxy products, and the curing composition employed, are disclosed. The process comprises contacting an epoxy resin with the curing composition, i.e., a polyamine curing agent and a phenyl urea accelerator. Also disclosed are cured epoxy resin compositions useful in adhesives, coatings, floorings, laminates and civil engineering applications.
Claims12
In the process for preparing cured epoxy resins which comprises contacting an epoxy resin of the oxirane structure and having an oxirane epoxy equivalency greater than 1.0 with a polyamine curing agent having more than one non-tertiary amino group per molecule, the improvement which comprises conducting said contacting in the presence of from about 0.005 to about 0.1 moles per 100 parts of the epoxy resin of an accelerator of the general formula:
- ##EQU5## wherein R is ##SPC3##
- R.sub.2 is selected from the group consisting of an alkyl group containing from 1 to 4 carbon atoms, chlorine and bromine,
- n is 0, 1 or 2, and
- R.sub.1 is selected from the group consisting of R and H.
An insoluble and infusible cured epoxy resin composition which comprises the reaction product of an epoxy resin of the oxirane structure and having an oxirane epoxy equivalency greater than 1.0, from about 0.05 to about 1.5 parts by weight per part of the epoxy resin of a polyamine curing agent having more than one non-tertiary amino group per molecule and selected from the group consisting of aromatic polyamines, aliphatic polyamines, and cycloaliphatic polyamines, and from about 0.005 to about 0.1 mole per 100 parts of the epoxy resin of an accelerator of the general formula:
- ##EQU6## wherein R is ##SPC4##
- R.sub.2 is selected from the group consisting of an alkyl group containing from 1 to 4 carbon atoms, chlorine and bromine,
- n is 0, 1 or 2, and
- R.sub.1 is selected from the group consisting of R and H.
Dependencies are inferred from the claim text.