| abstract |
PCT No. PCT/GB96/00518 Sec. 371 Date Sep. 11, 1997 Sec. 102(e) Date Sep. 11, 1997 PCT Filed Mar. 6, 1996 PCT Pub. No. WO96/28763 PCT Pub. Date Sep. 19, 19961. 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. |