发明名称 |
copolímetro de óxido de propileno/óxido de etileno, processo para fazer uma mistura de poliéter polióis, processo fazer uma espuma de poliuretano e espuma poliuretano |
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 |
BR112013004058(A2) |
申请公布日期 |
2016.07.05 |
申请号 |
BR20131104058 |
申请日期 |
2011.08.11 |
申请人 |
DOW GLOBAL TECHNOLOGIES LLC |
发明人 |
CARLOS M. VILLA;DAVID A. BABB;JEAN-PAUL MASY;RICCO B. BORELLA |
分类号 |
C08G65/00 |
主分类号 |
C08G65/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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