Ethylene oxide/propylene oxide polyether polyols and polyurethanes made therefrom
摘要
Copolymers of propylene oxide and ethylene oxide have an inner block that contains from 65-90 weight percent oxyethylene units and from 10 to 35 weight percent oxypropylene units. This block has a molecular weight of from 150 to 350. The copolymer has an outer block which contains at least 95 weight % oxypropylene units and from 0 to 5% oxyethylene units. The equivalent weight of the copolymer is from 800 to 2000. The copolymers are useful in making polyurethane foams that have unexpectedly high tensile and/or tear strengths.
申请公布号
AU2011293802(B2)
申请公布日期
2014.03.27
申请号
AU20110293802
申请日期
2011.08.11
申请人
DOW GLOBAL TECHNOLOGIES LLC
发明人
VILLA, CARLOS M.;MASY, JEAN-PAUL;BORELLA, RICCO B.;BABB, DAVID A.