There is provided a curable substantially uniform mixture of an epoxy silicone, polyarylonium salts and a compatibilizer in the form a mixture of a long chain alkyl substituted phenol and an alkane diol. The curable mixture is convertable to a non-toxic, tack free adherent release coating for pressure sensitive adhesives.
1. A solid composition comprising (a) a solid oligomeric, cationically polymerisable polyglycidyl ether or polyglycidyl ester, a mixture of a solid oligomeric, cationically polymerisable polyglycidyl ether or polyglycidyl ester and a liquid or crystalline monomeric mono-, di- or polyepoxy resin, or a mixture of a solid oligomeric, cationically polymerisable polyglycidyl ether or polyglycidyl ester and a cyclic acetal, said oligomeric polyglycidyl ether or polyglycidyl ester and the mixtures containing the oligomeric polyglycidyl ether or polyglycidyl ester having a glass transition temperature (T.sub.G) higher than 35.degree. C., (b) a multifunctional nucleophilic chain transfer agent, (c) 0.05 to 3% by weight, based on component (a), of a photoinitiator for the cationic polymerisation and, as optional components, (d) customary additives for powder coating compositions, which compositions are free from compounds containing a primary, secondary or tertiary nitrogen atom or contain such compounds only in an amount which at most is 50% of the amount of component (c), based on the molar concentration.
This invention relates to a radiation curable compositions. More particularly this invention relates to radiation curable compositions comprising a vinyl ether compound which is free of silicon atoms, a cationic photoinitiator, a free radical photoinitiator, and dodecylphenol. The radiation curable compositions of this invention are useful for coating a thin layer film that has potential for many applications in the coating industry.
Sulfonium salt photoinitiator compositions, precursors useful in the preparation of such photoinitiators and the use of these photoinitiators in, e.g., UV curable adhesives, UV curable sealants, UV curable coating compositions, such as printing inks and varnishes, and UV curable encapsulants.
Sulfonium salt photoinitiator compositions, precursors useful in the preparation of such photoinitiators and the use of these photoinitiators in, e.g., UV curable adhesives, UV curable sealants, UV curable coating compositions, such as printing inks and varnishes, and UV curable encapsulants.
A pressure sensitive adhesive tape is provided having a silicone-free release layer, said tape comprising (1) at least one backing layer; (2) at least one pressure sensitive adhesive layer, and (3) at least one silicone-free release layer, said release layer comprising a crosslinked poly(alkylene oxide), said poly(alkylene oxide) being defined by the formula X.sub.1 --(O--R).sub.n --OX.sub.2 where X.sub.1 and X.sub.2 are terminal groups at least one of which permits crosslinking of said poly(alkylene oxide), n ranges from 1 to 200,000, R is a straight or branched alkylene group having the formula (CR.sub.1 R.sub.2).sub.m where m is an integer from 1 to 10 and R.sub.1 and R.sub.2 may independently be hydrogen and C.sub.1-3 alkyl.
