Modified polyisocyanate and production process thereof
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United States of America Patent
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Apr 24, 2001
Grant Date -
N/A
app pub date -
Apr 28, 1999
filing date -
Apr 30, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A modified polyisocyanate which has a high emulsifying/dispersing ability in aqueous resin compositions (solution or dispersion) and can be used advantageously as a curing agent or cross-linking agentis disclosed. The modified polyisocyanate is comprised of a reaction product of a polyisocyanate (an aliphatic or alicyclic polyisocyanate such as 1,6-diisocyanate hexane or a derivative thereof) with one of the following components (1) to (3): (1) a nonionic emulsifying agent which contains active hydrogen atoms reactive with isocyanate group, has a hydrophile-lipophile balance (HLB) value of 17 or less and contains 15 to 35 in average of ethylene oxide units in one molecule, (2) a polyoxyalkylene alkylaryl ether which contains active hydrogen atoms, has an HLB value of from 5 to 17 and contains ethylene oxide unit and (3) a nonionic emulsifying agent which contains active hydrogen atoms and a coupling agent (e.g., a mercapto group-containing silane coupling agent) which contains active hydrogen atoms and has a hydrolysis condensing group.
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