Air-drying acrylate lacquer binders
Abstract
Abstract An air-drying lacquer binder comprising a copolymer of copolymerized units of 20 to 55% by weight of styrene, 5 to 30% by weight of glycidyl(meth)acrylate, and 0 to 50% by weight of at least one (meth)acrylic acid ester with 1 to 10 carbon atoms in the alcohol component, Which has been esterified with 0 to 15% by weight of at least one natural, drying fatty acid, and 10 to 50% by weight of isomerized drying fatty acids (the sum of the percentage contents amounting to 22 - 50 percent by weight) based on the copolymer and drying fatty acids and dicarboxylic acid anhydride subsequently used, up to an acid number of <10, from 30 to 75% by wt. of the isomerised drying fatty acids containing conjugated double bonds, and wherein the hydroxyl groups formed have, subsequently, been reacted with from 0.5 to 3% by weight, based on the total components of the binder, of tetrahydrophthalic acid anhydride and/or at least one isomer thereof. The lacquer binders possess very good pigment absorbing and wetting properties, very good lacquer-grade processibility and even after the addition of an anti-skinning agent constant drying times under constant drying conditions.
Inventors
- 👤 Rolf Dhein
- 👤 Lothar Fleiter
Bibliographic Details
Claims Analysis
Total Claims: 5References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |