Liquid photocurable compositions
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 15, 2000
Issued Date -
N/A
app pub date -
Sep 11, 1997
filing date -
Mar 11, 1995
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Abstract
1. This invention relates to a liquid composition comprising: a) 2 to 20 parts of a monomeric poly(meth)acrylate having a functionality of at least 3 and a MW of at least 650; b) 20 to 60 parts of a urethane(meth)acrylate having a functionality of 2 to 4 and a MW of 400 to 10,000; c) 20 to 80 parts of a monomeric or oligomeric di(meth)acrylate based on bisphenol A or bisphenol F; and d) 0.1 to 10 parts of a photoinitiator; wherein all parts are by weight and the total number of parts of a)+b)+c)+d) add up to 100. The compositions are suitable for the stereolithographic production of three-dimensional articles such as models of mechanical and body parts and are particularly notable for their low curl & shrinkage coupled with fast rate of cure.
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