Title:
NOVEL BLOCKED POLYISOCYANATE AND USES THEREOF
Document Type and Number:
WIPO Patent Application WO/1997/031961
Kind Code:
A1
Abstract:
A novel blocked polyisocyanate prepared by reacting at least one diisocyanate selected from among aliphatic diisocyanates and alicyclic diisocyanates with a polyhydroxy compound having 4.5 to 10 hydroxyl groups on average, removing unreacted diisocyanate from the reaction mixture substantially completely to prepare a non-blocked polyisocyanate, and blocking the terminal isocyanate groups of the non-blocked polyisocyanate with a thermally dissociating blocking agent. A coating composition comprising a polyol as the main component and the blocked polyisocyanate as the curing agent is excellent in low-temperature curing properties and can give coating films having high impact resistance. Further, the blocked polyisocyanate is excellent in compatibility with plasticizers, so that an adhesion-improving composition comprising the blocked polyisocyanate and a plasticizer and/or a solvent can give a plastisol composition excellent in low-temperature adhesion when combined with a plastisol.
Inventors:
ASAHINA YOSHIYUKI (JP)
USUI TAKETOSHI (JP)
USUI TAKETOSHI (JP)
Application Number:
PCT/JP1996/003539
Publication Date:
September 04, 1997
Filing Date:
December 04, 1996
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
ASAHINA YOSHIYUKI (JP)
USUI TAKETOSHI (JP)
ASAHINA YOSHIYUKI (JP)
USUI TAKETOSHI (JP)
International Classes:
C08G18/10; C08G18/80; C09J175/04; (IPC1-7): C08G18/80; C08G18/10; C09D175/04; C09J175/04
Domestic Patent References:
| WO1995032231A1 | 1995-11-30 |
Foreign References:
| JPH06293878A | 1994-10-21 | |||
| JPH08165326A | 1996-06-25 | |||
| JPH05310884A | 1993-11-22 | |||
| JPS5849770A | 1983-03-24 |
Other References:
See also references of EP 0884341A4
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