Paint composition for cathodic electrodeposition
US4256621A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1979 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | Aug 15, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A paint composition for cathodic electrodeposition in the form of an aqueous solution or dispersion which is essentially a resin prepared by the reaction of (A) a polymer; (B) an alcohol; (C) an epoxy resin; (D) an amine; and a polyisocyanate. The paint composition is prepared as follows: PA0 (a) first reacting a maleated conjugated diene polymer as an addition reaction compound of a maleic anhydride, with a homopolyer, a random copolymer, a block copolymer or a graft copolymer of a conjugated diene selected from the group consisting of 1,3-butadiene, isoprene, 1,3-pentadiene, chloroprene and cyclopentadiene, said homopolymer or copolymer of the conjugated diene having a number average molecular weight of 200 to 100,000, with PA0 (b) an alcohol having the tertiary amino group or a mixture of said alcohol and a monohydroxyl compound having 1 to 18 carbon atoms to obtain a semi-esterified product (B), and second, reacting said product (B) with PA0 (c) an epoxy resin having two equivalents or more of epoxy groups in proportion to one equivalent of carboxyl group in said product (B) to obtain a resultant product (C), and third reacting said product (C) with PA0 (d) a primary or seconda…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.