Active Energy Ray-Curable Resin Composition, Method for Producing the Same, and Seal Material Using the Same
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United States of America Patent
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Jun 25, 2015
app pub date -
Dec 25, 2012
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Dec 28, 2011
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Provided is an active energy ray-curable resin composition for seal materials, suitable as a bead-shaped seal material high in shape dimensional precision and excellent in productivity. An active energy ray-curable resin composition for seal materials including at least a thixotropy imparting agent (B) in an amount of 0.1 to 25 parts by weight dispersed in 100 parts by weight of an active energy ray-curable resin (A), wherein the active energy ray-curable resin composition has an apparent viscosity in an uncured state (according to JIS Z8803, cone and plate rotation viscometer, 40° C.) of 50 to 5000 Pa·s in a shearing speed range from 0.1 to 10/sec and has a thixotropic coefficient, determined from the apparent viscosity in the shearing speed range, of 1.1 to 10, the thixotropy imparting agent (B) is made of silica fine particles, and the silica fine particles in the active energy ray-curable resin (A) has a particle size distribution having a plurality of peaks.
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