| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 10.99 |
| PATENT ASSIGNEE | Sun Chemical Corp |
| PATENT CLAIMS |
- Esterifying fumarated gum rosin with pentaerythritol to produ ce modified rosin having acid No. 157-175 - Reacting 1 part of said modified rosin with 1 part of styrena ted acrylic copolymer having acid No. 202 under esterifica tion conditions at 180C for 1 hour whereby a resin is produ ced having acid value 160-173, MP 155-165C & MW 14,400 - Dissolving resin by reaction in dilute ammonium hydroxide to provide soln having pH 8.5 |
| PATENT PHOTOCOPY | Available on request |
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