Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1993-09-08
1996-03-12
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
522 90, 522 96, 522103, 522107, 525123, 525440, 525455, 525457, 525458, 525528, 528 75, C08F 830, C08L 7504, C08L 7506
Patent
active
054987822
ABSTRACT:
Distortion control additives are disclosed which comprise a polyisocyanate, a polyol or polyol blend having a hydroxyl functionality of 2 to 3 hydroxyl groups per molecule and an average molecular weight of at least about 500 grams per gram mole, a diol chain extender having from about 2 to 35 carbon atoms per molecule and an acrylate or methacrylate having an acrylate functionality of from 1 to 5 acrylate groups per molecule. Ultraviolet-curable liquid compositions comprising an unsaturated polymeric resin, a monomer and the distortion control additives of the present invention are also disclosed. The distortion control additives can provide substantial reductions in distortion, e.g., shrinkage, of objects produced by ultraviolet curing, e.g., stereolithography.
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Investigation of Saturated Resins in UV Coatings; by John R. Costanza and Edward J. Kuzma--Journal of Radiation Curing pp. 24-31, Jan. 1983.
Seidleck James J.
Sergent Rabon
Union Carbide Chemicals & Plastics Technology Corporation
Volles W. K.
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