Polyurea polymers prepared from urea containing prepolymers

US4686242A · kind A · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• Robert B. Turner · Georgetown, US
• Richard D. Peffley · Lake Jackson, US
• Raymond A. Plepys · Lake Jackson, US
• Ralph D. Priester, Jr. · Lake Jackson, US
• Manuel Gonzales · Lake Jackson, US
• Kimbley A. Bushman · Lake Jackson, US

Key dates

• Filing date: Jan 31, 1986
• Grant date: Aug 11, 1987
• Expiry date: Jan 31, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2120/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention comprises a process whereby an amine functional compound having an equivalent weight of at least about 400 is reacted with an excess of a polyisocyanate to form an isocyanate-terminated prepolymer or quasi prepolymer, which polymer or quasi prepolymer is reacted with an isocyanate-reactive material which is preferably a relatively low equivalent weight polyol or mixture thereof with an additional amount of said amine functional compound or a relatively high equivalent weight polyol to form a polyurea containing polymer which is preferably non-cellular or microcellular.