Vantico Limited

Ciba Specialty Chemicals Corporation

Vantico At&t US Inc.

Wang Renyi

Thomas H Pang

Anastasios P Melisaris

John Wai Fong

John W Fong

The present invention relates to novel resin compositions containing at least one solid or liquid actinic radiation-curable and cationically polymerizable organic substance, an actinic radiation-sensitive initiator for cationic polymerization, an actinic radiation-curable and radical-polymerizable organic substance and an actinic radiation-sensitive initiator for radical polymerization. The actinic radiation-curable and cationically polymerizable organic substance is at least one glycidylether of a polyhydric aliphatic, alicyclic or aromatic alcohol having at least three epoxy groups with epoxy equivalent weight between 90 and 800 grams per equivalent, at least one solid or liquid alicyclic epoxide with an epoxy equivalent weight between 90 and 330 grams per equivalent having at least two epoxy groups and monomer purity greater than about 90% by weight, or at least a solid or liquid epoxycresol novolac or epoxyphenol novolac having epoxy equivalent weight between 130 and 350, or mixtures thereof. The use of the above-mentioned cationically polymerizable components substantially increases the heat deflection temperature of the cured articles while maintaining high photospeed, accuracy, wetting-recoatability, water resistance and good side wall finish. The present invention further relates to a method of producing a cured product, particularly a three-dimensional article, in which a compositions described above are treated with actinic radiation.

Liquid, radiation-curable composition, especially for producing cured articles by stereolithography having heat deflection temperatures

The present invention relates to stereolithographic compositions containing an actinic radiation-curable and cationically polymerizable organic substance, a cationic initiator, a radical photoinitiator, and at least one cationic reactive modifier containing at least two reactive groups per molecule or at least one polyether polyol or mixtures thereof. The cationic reactive modifier has at least one chain extension segment with a molecular weight of at least about 100 and not more than about 2,000. The polyether polyol has a molecular weight greater than or equal to about 4,000. The use of the cationically reactive modifiers and polyether polyol modifiers substantially increases the flexibility and toughness of the cured articles without compromising photospeed, accuracy and wetting-recoatability of the compositions. The present invention further relates to a method of producing a cured product, particularly three-dimensional shaped articles by treating the composition described above with actinic radiation.

Liquid, radiation-curable composition, especially for producing flexible cured articles by stereolithography

Liquid, radiation-curable composition, especially for producing flexible

Liquid radiation-curable composition especially for producing cured

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Alhambra, CA, United States of America

Wang Renyi