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Article: Oil modified and waterborne polyurethane resin. (Technology Forum).
- Article from:
- The Journal of Coatings Technology
- Article date:
- August 1, 2002
- Author:
CopyrightCOPYRIGHT 2002 Federation of Societies for Coatings Technology. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Air-dried water-dispersed polyurethane resins were produced from poly(propylene-ethylene) copolymer triol, monoglyceride, toluene diisocyanate, and tartaric acid. Monoglyceride and poly(propylenc-ethylene) co polymer triol were employed at different ratios, with the monoglyceride ranging between 50-70% of the total polyol used, and the isocyanate/hydroxyl ratio was kept at 1.82. Some surfaces showed heavy wrinkling when the monoglyceride was below 54.5% and above 60%, yet clear and unwrinkled surfaces occurred when the monoglyceride fell between 54.5-60%. The hardness values increased as the percentage of monoglyceride increased. Hardness, impact, adhesion, bending, and ...