C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/67 (2006.01) C08F 2/48 (2006.01) C08G 18/32 (2006.01) C08G 18/38 (2006.01) C08G 18/73 (2006.01) C08G 18/75 (2006.01) C08G 18/78 (2006.01) C08G 18/80 (2006.01) C09D 5/02 (2006.01) C09D 175/16 (2006.01)
Patent
CA 2386222
The invention relates to aqueous polyurethane dispersions which can be hardened with UV radiation and thermally. Said polyurethane dispersions contain the following: compounds bonded with polyisocyanates, with C=C double bonds that can be polymerised with UV-radiation; aliphatic diols inserted with isocyanates, with a molecular weight of less than 500 g/mol; compounds bonded with isocyanates, with carboxylic acid or sulphonic acid groups and/or salts thereof, free hydroxyl groups and compounds with blocked isocyanate groups. The inventive polyurethane dispersions are suitable for coating thermostable substrates such as metal substrates and can be advantageously used for clear automobile lacquers.
L'invention concerne des dispersions de polyuréthanne aqueuses durcissables par des rayons ultraviolet et par voie thermique. Ces dispersions contiennent des composés liés par des polyisocyanates et ayant des liaisons doubles C=C polymérisables par rayons ultraviolet, des diols aliphatiques incorporés par des isocyanates et ayant un poids moléculaire inférieur à 500 g/mol, des composés liés par des isocyanates et ayant des groupes d'acide carboxylique ou sulfonique et/ou leurs sels, des groupes hydroxy libres et des composés avec des groupes d'isocyanate bloqués. Ces dispersions sont adaptées au revêtement de substrats thermostables comme les substrats métalliques et elles s'utilisent avantageusement pour les vernis clairs dans l'automobile.
Beck Erich
Bruchmann Bernd
Meisenburg Uwe
Paulus Wolfgang
Schrof Wolfgang
Basf Aktiengesellschaft
Robic
LandOfFree
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