Composition (e. g. ink or varnish) which can undergo cationic and/or radical polymerization and/or crosslinking by irradiation, based on an organic matrix, a silicone diluent and a photoinitiator
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United States of America Patent
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Mar 8, 2005
Grant Date -
Dec 4, 2003
app pub date -
Apr 1, 2003
filing date -
Mar 25, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention aims at improving such compositions by proposing a non-toxic diluent harmless to reactivity and by making these compositions translucent, free from metallic impurities and capable of constituting light-polymerisable varnish with good properties of ductility for leveling and surface coating. This aim is achieved by the invention which proposes a composition comprising an organic polymerisable matrix A, containing cyclo-aliphatic epoxide resins or not, acrylates, alkenyl-ethers or polyols, a silicon diluent B with viscosity less than 100 MPa's, a radical and/or cationic (onium salt) photoinitiator C, optionally a light-sensitising material D, a pigment E and another additive F; provided that when A is a cyclo-aliphatic epoxide resin, B has a metal concentration not more than 100 ppm. The invention also concerns the use of the silicon diluent B for preparing a composition crosslinkable by cationic and/or radical process, under UV radiation, in the presence of a photoinitiator (ink or varnish).
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