Title:
PREPARATION AND USE OF BIURET-CONTAINING POLYISOCYANATES AS CROSS-LINKING AGENTS FOR COATINGS
Document Type and Number:
WIPO Patent Application WO2003025040
Kind Code:
A8
Abstract:
Biuret group-containing polyisocyanates are produced having an isocyanate functionality of at least (4) are prepared by reacting polyisocyanates having a functionality of at least (2.8) with water as the biuretizing agent. Most preferably water is used as the sole biuretizing agent. The preparation is useful as a curing agent in crosslinkable coating compositions. The coating composition can be used as an automotive clearcoat over a conventional pigmented basecoat, or as a basecoat or monocoat or even as a primer or sealer when a suitable amount of pigment is incorporated therein.
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Inventors:
ADAMS JEROME T (US)
BARSOTTI ROBERT J (US)
LEWIN LAURA A (US)
HALPAAP REINHARD (DE)
MAGER DIETER (DE)
SHAFFER MYRON W (US)
BARSOTTI ROBERT J (US)
LEWIN LAURA A (US)
HALPAAP REINHARD (DE)
MAGER DIETER (DE)
SHAFFER MYRON W (US)
Application Number:
PCT/US2002/029938
Publication Date:
March 11, 2004
Filing Date:
September 20, 2002
Export Citation:
Assignee:
DU PONT (US)
BAYER AG (US)
ADAMS JEROME T (US)
BARSOTTI ROBERT J (US)
LEWIN LAURA A (US)
HALPAAP REINHARD (DE)
MAGER DIETER (DE)
SHAFFER MYRON W (US)
BAYER AG (US)
BAYER AG (US)
ADAMS JEROME T (US)
BARSOTTI ROBERT J (US)
LEWIN LAURA A (US)
HALPAAP REINHARD (DE)
MAGER DIETER (DE)
SHAFFER MYRON W (US)
BAYER AG (US)
International Classes:
C08G18/02; C08G18/42; C08G18/62; C08G18/78; C08G18/79; C09D5/00; C09D5/03; C09D175/00; C09D175/04; C09D175/06; (IPC1-7): C08G18/02; C08G18/78; C08G18/79
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