C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
31/162, 400/7637
C09D 5/25 (2006.01) C08G 63/91 (2006.01) C08G 73/16 (2006.01) C08L 67/00 (2006.01) C09D 167/00 (2006.01) C09D 179/08 (2006.01) H01B 3/30 (2006.01)
Patent
CA 1070036
Process for obtaining enamels based on a polyester- -polyimide resin, characterized in that it comprises: - preparing said resin with a number of reactive free carboxyl groups, such as to confer to said resin a free acid number N in excess of 30, - cooling and subsequently granulating said resin, - adding said cooled and granulated resin to a water bath in a ratio of 20-50, preferably 25-35 weight parts of resin to 100 parts of water, - heating the resin-containing bath thus obtained to a temperature within the range from 30°C to 70°C, preferably from 40°C to 60°C, - adding to said bath comprising said resin, while maintaining said temperature, an aminio salifying agent for said free carboxyl groups and a catalyst selected from the group of titanium-alkyl compounds, - stirring said bath while maintaining the above temperature till complete dissolution.
243470
Cean S.p.a.
Na
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