Abstract:
Cationic polymerization of epoxy resin materials, such as epoxy monomers or prepolymers, can be achieved by use of certain radiation sensitive aromatic onium salts of Group VIa elements. Curable compositions are provided which can be used as sealants, coating compounds, encapsulants, etc.
Abstract:
Cationic polymerization of a variety of organic materials such as vinyl monomers, prepolymers, cyclic ethers, cyclic esters, cyclic amines, cyclic sulfides and organosilicon cyclics can be achieved by the use of certain radiation sensitive aromatic onium salts of Group Va elements. In addition, polymerizable compositions are provided which can be used as coating compounds, molding resins, adhesives, etc.
Abstract:
A coating method is provided based on the use of a UV curable mixture of a polyolefin and a polythiol having an onium salt photoinitiator. There are also provided, ultraviolet radiation curable compositions useful as coating compositions.
Abstract:
Cationic polymerization of a variety of organic materials such as vinyl monomers, prepolymers, cyclic ethers, cyclic esters, cyclic sulfides and organosilicon cyclics can be achieved by the use of certain radiation sensitive aromatic onium salts of Group VIa elements. In addition, polymerizable compositions are provided which can be used as coating compounds, molding resins, adhesives, etc.
Abstract:
The present invention includes vinyl ether functional oligomers and methods for their preparation, the method including alternating free radical copolymerization of a dialkyl maleate or dialkyl fumerate monomer with a multifunctional vinyl ether monomer in the presence of a solvent with a high chain transfer constant. Also within the scope of the invention are uses for the vinyl ether functional oligomers compositions of this invention, including radiation curable coatings, adhesives, printing inks and composites.
Abstract:
A process for preparing α, ω-functional siloxane compounds in a purity of greater than or equal to 90% includes contacting a monohydrosiloxane compound of formula 1 with oxygen in the presence of a platinum group catalyst, without adding water, to form the α, ω-functional siloxane compound in a purity of greater than or equal to 90%; wherein n is 0, 1, or 2; R1 is fluoroethyl, methyl or phenyl; and R2 is substituted alkyl, epoxyalkyl, oxetanylalkyl, substituted oxaalkyl, epoxyoxaalkyl, oxetanyloxaalkyl, alkenyl, alkylalkoxysilyl, substituted alkylaryl, and substituted arylalkyl.
Abstract:
Diaryliodonium salts are disclosed, as well as a method for preparing them, in which one of the aryl groups bonded to the positively-charged iodine ion contains a methyl substituent, and the other one contains a hydroxyl-substituted alkoxy group. The salts are synthesized from (o, m, or p)-iodotoluene, as opposed to iodobenzene, and therefore do not pose a carcinogenic risk. In addition, the present salts are unexpectedly more soluble in most organic solvents, as well as in nonpolar monomers, than the corresponding benzene catalysts. The salts are useful as cationic photoinitiators, cationic thermal initiators (often combined with a cocatalyst, e.g. copper), and as starting materials in the synthesis of urethane-containing iodonium salts.
Abstract:
Unsaturated or polyunsaturated, conjugated or nonconjugated hydrocarbons are reacted with an oxidizing agent including hydroperoxides and monopersulfate compounds in the presence of phase-transfer catalysts. Suitable hydrocarbons include ricinic compounds such as castor oil and dehydrated castor oil. The phase-transfer catalysts include novel tungsten peroxo complexes, such as quaternary ammonium tetrakis (diperoxotungsto) phosphates, and crown ethers. Other additives utilized include pH buffers and alkaline compounds including alkali metal and alkaline earth metal carbonates, and solvents.
Abstract:
A method of accelerating the cure rate of an epoxy curing composition includes combining a cycloaliphatic epoxyalcohol monomer, a non-hydroxyl-containing epoxy monomer and a cationic photoinitiator to form an epoxy curing composition, and exposing the curing composition to a source of radiation. The resulting polymers and copolymers are branched polyethers containing hydroxyl functionality.
Abstract:
Disclosed are compounds of the formulas ##STR1## which are useful as monomers in photopolymerizable compositions. Also disclosed are methods of polymerizing these monomers, and polymers produced thereby.