Stable nonaqueous microparticle dispersions prepared from aminoplast resins
US5084506A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1987 |
| Grant date | Jan 28, 1992 |
| Priority date | — |
| Expiry date | Dec 3, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/923
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A stable, nonaqueous microparticle dispersion of the polymeric reaction product of reactants containing an aminoplast resin and a hydroxyl containing material is characterized in that less than 20 percent of the polymer microparticles have a mean diameter greater than 5 microns, further characterized in that at a total solids content of 60 percent the Brookfield viscosity is less that 1000 centipoise measured at 50 RPM using a number 3 spindle at 25.degree. C., the polymeric reaction product being prepared from reactants which are substantially free of acrylic polymer in a nonaqueous medium which is inert to the reactants. Stable nonaqueous microparticle dispersions characterized as above can also be prepared by the self condensation of an aminoplast resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.