Photocurable self-retainable gel, shaped article prepared theref

Details Photocurable self-retainable gel, shaped article prepared theref Photocurable self-retainable gel, shaped article prepared theref

1993-11-15

1995-06-20

Chapman, Mark A.

Radiation imagery chemistry: process, composition, or product th

Imaged product

Including resin or synthetic polymer

430280, 430281, 430300, 430309, 430311, 430325, 430330, 430910, 522109, 522121, G03C 300

Patent

active

054260086

ABSTRACT:
A photocurable gel suitable for articles such as printing plates, photoresists and the like is disclosed. The photocurable eel comprises (a) a polymer composition having isotactic polymethyl methacrylate moiety; and syndiotactic polymethyl methacrylate moiety; (b) a photopolymerizable ethylenically unsaturated compound; and (c) a photopolymerization initiator. The gel is solid at ambient temperature and is capable of undergoing reversible gel/sol transition by heating or cooling. Methods of preparing articles, as well as methods of fixing articles, which use the gel are also disclosed. Such methods include sealing or affixing component parts on an electronic circuit board.

REFERENCES:
patent: 4125700 (1978-11-01), Graham
Journal of Applied Polymer Science, Vo. 20, 1775-1785 (1976) "Viscoelastic Properties of Stereocomplex Polymers"; Y. Mori et al.
Journal of Polymer Science, vol. XVI, pp. 345-355 (1955): "Preparation of Graft Copolymers from Autoxidized Polystyrene Derivatives"; D. J. Metz et al.
Kagakudojin, pp. 225 to 226 and pp. 386 to 387 (1972): "Experimental Methods for Polymer Syntheses"; T. Ohtsu et al.
Chemical Abstracts, vol. 82, No. 16, 1975, Columbus, Ohio, USA. TORAY: "Hydrophilic Polymer Gels for Prosthetic Materials," Abstract No. 99107t of Japan Kokai 74-98,856.

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