发明名称 |
POLYURETHANE DISPERSION (PUD) WITH IMPROVED ISOPROPANOL RESISTANCE, FLEXIBILITY AND SOFTNESS |
摘要 |
Isocyanate-functional polyurethane prepolymers and aqueous dispersions therefrom which are useful for the production of flat materials having excellent resistance to alcoholic solvents are described. The prepolymers are prepared by reacting: A) an isocyanate selected from the group consisting of i) an aliphatic and/or a cycloaliphatic isocyanate, ii) a mixture of an aromatic isocyanate and an aliphatic and/or a cycloaliphatic isocyanate, B) a di- or polyhydroxy compound having a number average molecular weight of from 700 to about 16,000, and C) optionally, a dihydroxy and/or polyhydroxyl compound having a number average molecular weight of less than 700, with the provisos that a) at least one of components A), B or C) has a functionality of more than 2 and b) if both component A) and component B) are difunctional, component C) cannot be a trihydroxy component of the formula: <?in-line-formulae description="In-line Formulae" end="lead"?>R-(OH)<SUB>3</SUB><?in-line-formulae description="In-line Formulae" end="tail"?> where R is a saturated straight chain or branched chain aliphatic group of from 2 to 8 carbon atoms. |
申请公布号 |
CA2540607(A1) |
申请公布日期 |
2005.04.21 |
申请号 |
CA20042540607 |
申请日期 |
2004.09.27 |
申请人 |
BAYER MATERIALSCIENCE AG;BAYER MATERIALSCIENCE LLC |
发明人 |
MAYER, EDUARD;CRISCI, MARY A.;ROESLER, RICHARD R.;YU, POLI C.;BERESKIN, YULIA;MUENZMAY, THOMAS |
分类号 |
C08G18/08;C08G18/10;C08G18/12;C08G18/40;C08G18/48;C08G18/72 |
主分类号 |
C08G18/08 |
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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