Water-based surface-treating agent for metallic material

Details Water-based surface-treating agent for metallic material Water-based surface-treating agent for metallic material

C - Chemistry, Metallurgy

09

D

C09D 5/08 (2006.01) C08F 2/24 (2006.01) C09D 5/02 (2006.01) C09D 133/02 (2006.01) C09D 133/06 (2006.01) C23C 22/28 (2006.01) C23C 22/30 (2006.01) C23C 22/33 (2006.01) C23C 22/38 (2006.01)

Patent

CA 2343742

A water-based surface-treating agent for metallic materials which gives a film highly satisfactory in corrosion resistance, blackening resistance, wet secondary adhesion to topcoatings, low-pollution characteristics (amount of fixed chromium), chemical resistance (especially acid resistance and alkali resistance), etc., while retaining the intact practical liquid stability of conventional chromate- containing resinous coating agents. The water-based surface-treating agent comprises a synthetic resin emulsion and hexavalent chromium ions and has a pH of 5 or lower, the synthetic resin emulsion being one obtained by emulsion- polymerizing the following ingredients using a nonionic polymerizable emulsifier and a nonionic nonpolymerizable emulsifier: (1) an ethylenic carboxylic acid, (2) a functional acrylic monomer having at least one of N-((un)substituted methylol)carbamoyl, phosphonate, alkoxy, cyano, and carbamoyl groups, and (3) a third monomer which is different from the ingredients (1) and (2) and forms the skeleton of the copolymer to be obtained.

L'invention porte sur un agent de traitement de surface à base aqueuse pour matériaux métalliques produisant un film très satisfaisant pour ce qui est de la résistance à la corrosion, et au noircissement, de l'adhérence secondaire à l'état humide sur des couches de finition, de sa faible pollution (quantité de chrome fixée), de sa résistance chimique (en particulier aux acides et aux bases), tout en conservant intacte la stabilité pratique des liquides des revêtements usuels résineux chromatés. Ledit agent comprend une émulsion de résine synthétique et des ions chrome hexavalents, et son pH est de 5 ou moins. L'émulsion de résine synthétique s'obtient par polymérisation en émulsion des ingrédients ci-après à l'aide d'un émulsifiant non ionique polymérisable et d'un émulsifiant non ionique non polymérisable: (1) un acide éthylénique carboxylique; (2) un monomère acrylique fonctionnel présentant au moins un groupe choisi parmi: N-((non) substitué méthylol) carbamoyle, phosphonate, alkoxy, cyano et carbamoyle, et (3) un troisième monomère différent des ingrédients (1) et (2) et formant le squelette du polymère à obtenir.

Affiliated with

Also associated with

Rating

Water-based surface-treating agent for metallic material does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Water-based surface-treating agent for metallic material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water-based surface-treating agent for metallic material will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1543309