Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1995-12-08
1998-09-01
Sergent, Rabon
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
524284, 524300, 524306, 524311, 524500, 524590, 524773, 524875, 525123, 525454, 525455, 528 48, 528 75, C08K 5103, C08F 830
Patent
active
058013920
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, eg., stereolithography.
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Investigation of Sturated Resins in UV Coatings; by John R. Costanza and Edward J. Kuzma-Journal of Radiation Curing pp. 24-31, Jan.-1983.
Sergent Rabon
Union Carbide Chemicals & Plastics Technology Corporation
Volles W. K.
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