Modified epoxy resins, processes for making and using same...

Details Modified epoxy resins, processes for making and using same... Modified epoxy resins, processes for making and using same...

C - Chemistry, Metallurgy

08

L

400/3021

C08L 63/00 (2006.01) C08F 283/10 (2006.01) C08L 51/08 (2006.01) C08L 57/00 (2006.01)

Patent

CA 1099834

1-2362-1 Abstract Discloses a technique for modifying an epoxy resin by reacting with addition copolymerizable monomer in the presence of at least 3% of benzoyl peroxide at about 110°C to 120°C, or the free radical initiating equivalent thereof. The reaction mixture obtained contains: (a) unreacted epoxy resin; (b) graft polymer; and (c) associatively formed by ungrafted addition polymer. The graft polymer is formed from the epoxy resin by the grafting of addition polymer onto aliphatic backbone carbons of the epoxy resin, such grafting being at carbons that have either one or two hydrogens bonded thereto in the ungrafted state. The process is useful for making polymer blends for coating compositions, and particularly, coatings for cans for foods and beverages, especially for beer. The coating compositions may be aqueous dispersions ready for spray application, or concentrate that can be made up readily into aqueous sprayable coating compositions. Solvent vehicles may also be used.

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