At least trifunctional epoxy resin reacted with solid rubber mixed with epoxy resin and curing agent

Year	Description
1997	Invention patented by Patrick T. McGrail, Stephen D. Jenkins, Jeffrey T. Carter, Peter R. Ciriscioli, Scott D. Lucas, and Robin K. Maskell on July 27th, 1997. Abstract: A curable composition and a method of making it comprises reacting in the presence of a catalyst epoxy resin(s) having at least 0.05% by weight of epoxy resin oligomer with a solid rubber which is swellable or soluble in the reaction mixture and possessing at least 1% by weight of reactive groups, in a rubber:epoxy resin(s) weight ratio of between 1:1 and 1:20, wherein said epoxy resin(s) comprises (a) at least one epoxy resin having an epoxy functionality of greater than three and (b) at least one second epoxy resin having a functionality of greater than one but not more than three; heating to effect the reaction, cooling to substantially ambient temperature, and adding any remaining portion of epoxy resin and curing agent(s).
Source: selected by the editor from original sources.

Invention: At least trifunctional epoxy resin reacted with solid rubber mixed with epoxy resin and curing agent