Title:
METHOD FOR THE PREPARATION OF THERMOHARDENING LACS,WHICH MAY BE DILUTED WITH WATER,FOR COATING METAL SUBSTRATES AND UTILIZATION THEREOF AS A COVERING MEANS
Document Type and Number:
WIPO Patent Application WO1982000155
Kind Code:
A1
Abstract:
The lacs are appropriate for the cataphoretic deposit of a coating on electrically conducting substrates used as cathodes. They are prepared with 5 - 35% by weight at least of an epoxy resin, 2 - 20% by weight at least of a ketonic and/or hydrocarbonated resin, 15 - 60% by weight at least of a cationic synthetic resin with functional groups, present with a concentration of 10-70% as a dispersion or solution, 5 - 30% by weight at least of an organic cross-linking agent, solid at room temperature and 0 to 70% by weight of pigments and/or additives. All these compounds are mixed in a ground aggregate state, in one or a plurality of steps, one step at least occuring in a wet medium, so as to form an homogeneous lac which has a particle size of less than 100, preferably less than 15 //cm. The mixture is then brought with water at a solid particle content required by a substrate which is preferably comprise between 1 and 30% by weight. The method allows to obtain a good homogeneity of the particles and thereby a uniform thickness of the coating layer exhibiting a particularly high resilience resistance.
Inventors:
SHROFF F (DE)
JOHANNES G (DE)
STEIDL D (DE)
DULLIS G (DE)
JOHANNES G (DE)
STEIDL D (DE)
DULLIS G (DE)
Application Number:
PCT/EP1981/000082
Publication Date:
January 21, 1982
Filing Date:
June 25, 1981
Export Citation:
Assignee:
HOECHST AG (DE)
International Classes:
C08L63/00; C09D5/44; C09D7/80; C09D163/00; C09D165/00; (IPC1-7): C09D5/40; C09D3/00; C08L63/00
Foreign References:
| DE2248836A1 | 1973-04-12 | |||
| DE2919130A1 | 1979-11-15 | |||
| US3970621A | 1976-07-20 |
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