Pigmented, particulate powder coating composition
US4060511A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1976 |
| Grant date | Nov 29, 1977 |
| Priority date | — |
| Expiry date | Jan 7, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/904
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A free-flowing, homogeneous, polymer-coated pigment, particulate powder coating composition is obtained in preparing a coating composition involving catalytic polymerization of at least one ethylenically unsaturated monomer in a nonaqueous aliphatic hydrocarbon solvent for said monomer and in the presence of a dispersion stabilizer having a polymeric segment solvated by said solvent and another segment relatively non-solvated by the solvent and associated with polymer particles which are formed upon said polymerization of said monomer and which are insoluble in said solvent for providing a nonaqueous dispersion of said polymer particles, through a sequence of steps including: PA1 I. preparing said dispersion stabilizer in a solution containing a coalescing solvent which is an active solvent for said polymer particles; PA1 Ii. admixing a portion of the product of (i) with said pigment to form a pigment dispersion; PA1 Iii. drying another portion of the product of (i); PA1 Iv. admixing the products of (ii) and (iii) in said nonaqueous aliphatic hydrocarbon solvent so that the resulting mixture contains not more than 6000 parts per million of the coalescing solvent with a then adding …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.