Hydroxyl-terminated polyepichlorohydrin polymers
AssigneeMinnesota Mining and Manufacturing Company
InventorBirger Johannessen
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Abstract
Hydroxyl terminated polyepichlorohydrin having a polydispersity of less than 1.2 and a molecular weight of at least 2000, and method of preparation using stannic chloride and strong carboxylic acid co-catalysts.
Claims11
A polyepichlorohydrin product having a number average molecular weight of at least 2000 and a polydispersity of less than 1.2, said product comprising predominantly secondary hydroxyl-terminated polyepichlorohydrin polymer and essentially no non-hydroxyl functional cyclic ether oligomer, said product being made by polymerizing epichlorohydrin in the presence of anhydrous stannic chloride catalyst, a strong carboxylic acid co-catlyst, and an alcohol as an initiator.
Dependencies are inferred from the claim text.