发明名称 |
USE OF POLY(BUTYLENE OXIDE) POLYOL TO IMPROVE DURABILITY OF MDI-POLYURETHANE FOAMS |
摘要 |
<p>Embodiments of the present invention relate to polyurethane foams having high air flow while maintaining viscoelastic properties. In one embodiment, a reaction system for preparation of a viscoelastic polyurethane foam is provided. The reaction system comprises (a) a polyisocyanate component and (b) an isocyanate reactive component. The isocyanate reactive component comprises (i) from 35 to 74% by weight of the isocyanate reactive component of one or more propylene oxide rich (PO-rich) polyols having a combined number average equivalent weight from 200 to 500, (ii) from 24 to 50% by weight of the isocyanate reactive component of one or more ethylene oxide rich (EO-rich) polyols having a combined number average equivalent weight from 200 to 2,800, and (iii)from 2 to 10% by weight of the isocyanate reactive component of one or more butylene oxide rich (BO-rich) polyethers having a number average equivalent weight of 2,000 or more.</p> |
申请公布号 |
EP2621984(B1) |
申请公布日期 |
2015.02.25 |
申请号 |
EP20110752041 |
申请日期 |
2011.08.23 |
申请人 |
DOW GLOBAL TECHNOLOGIES LLC |
发明人 |
AOU, KAORU;GAMBOA, ROGELIO R.;OBI, BERNARD E. |
分类号 |
C08G18/28;C08G18/48 |
主分类号 |
C08G18/28 |
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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