Curable epoxy resins
AssigneeGeneral Electric Company
InventorCharles J. Stark, Jr.
Life of this patent
Estimating the term…
Abstract
Curable epoxy resin compositions which exhibit controllable cure rates are described which utilize catechol derived accelerators in combination with certain curing agents. These accelerators can be employed in single package curable epoxy resin compositions useful in molding and casting applications.
Claims29
A composition of matter comprising an epoxy resin, a cure initiator, and an accelerator of the general formula ##STR10## where R is independently selected from the class consisting of hydrogen, monovalent alkyl groups of from 1 to 8 carbon atoms, aryl, alkaryl, vinyl, and allyl radicals;
- A is independently selected from alkyl radicals the same as R above;
- alkoxy groups having 1 to 6 carbon atoms;
- halogen and the nitro radical, where A can be ortho-, meta or para- to any of the oxygen atoms, attached to silicon and m is an integer from 0 to 2, inclusive, with the proviso, that at most only one hydrogen can be on any one silicon atom.
A method for curing an epoxy resin which comprises
- (1) forming a mixture of ingredients comprising an epoxy resin, a cure initiator, and an accelerator of the general formula ##STR23## R is independently selected from the class consisting of hydrogen, monovalent alkyl groups of from 1 to 8 carbon atoms;
- aryl, alkaryl, vinyl, and allyl radicals, A is independently selected from alkyl radicals the same as R above, alkoxy groups of from 1 to 6 carbon atoms;
- halogen and the nitro radical, where A can be ortho-, meta-, or para- to any of the oxygen atoms attached to silicon, and m is an integer from 0 to 2, inclusive, with the proviso, that at most only one hydrogen can be on any one silicon atom.
- (2) heating the aforesaid mixture of ingredients at a temperature and for a time sufficient to effect curing of said epoxy resin.
Dependencies are inferred from the claim text.