Cathodically depositable resins and process of preparing same
US4237038A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1978 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Oct 12, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Binders for cathodically depositable aqueous coating compositions comprising the reaction product, having an NCO-value of zero, of PA1 (A) polymers carrying reactive hydroxyl groups and having a hydroxyl number of at least about 40 mg KOH/g; and PA1 (B) compounds carrying per molecule an average of 0.8 to 1.5, and preferably 1.0, free isocyanate groups and at least one teritary basic aliphatically bound nitrogen atom. Optionally, the reaction product of (A) and (B) can include as PA1 (C) a compound carrying an average of 0.8 to 1.5, and preferably 1.0, free isocyanate groups and from 1 to 3 olefinic double bonds. Coating compositions containing the partially or totally neutralized reaction product when depositrd cathodically in an electrodeposition system will cure at relatively low temperatures and relatively short curing times to provide films having good resistance to water, chemicals, and corrosion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.