Esacure ONE by IGM Resins is a difunctional oligomeric alpha hydroxy ketone. It is a type I photoinitiator. Provides through and surface cure. Formula (1) was prepared using both Esacure M (A) and Esacure ONE (B). The results of the tests performed are reported in figures 1 & 2. Curing was. ONE offers very low odor levels and low migration but suffers from low solubility. A liquid version, Esacure ONE 75, is a 75% solution of ONE in 25% ethozylated.
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ESACURE ONE by LEHVOSS Group – Paint & Coatings
The formulation was placed into a glass bottle and photoinitiator was added during stirring with toothed disk at rpm. The liquid blend has at room temperature a viscosity not higher than mPas and therefore can be processed as a liquid with standard technical equipment for pumping and mixing of liquid materials.
Further examples of unsaturated oligomers are unsaturated polyester resins, which are usually prepared from maleic acid, phthalic acid and one or more diols and have molecular weights of from about to The application properties of example 9 were assessed in an overprint varnish OPV.
The extend of curing was followed by measurement of acrylate double bond conversion DBC against the resin itself as reference using AT-IR spectroscopy of the coating surface. These application results show that the liquid product form provides clear processing advantages handling and incorporationwithout compromising curing efficiency.
The use of a homogeneous liquid blend according to claim 1 in the production of solvent-free, solvent- and water-based surface coatings, printing inks, screen-printing inks, offset-printing inks, flexographic-printing inks, resist materials or image-recording material. LU Free format text: GB Ref legal event code: An example for a castor oil ethoxylates is one marked under the trademark Hedipin.
The European Patent EP Lamberti discloses an aqueous dispersion comprising a photoinitiator and a surfactant. The mixture is cooled slowly to room temperature.
EPB1 – Liquid photoinitiator blend – Google Patents
A homogenous liquid blend according to claim 1 wherein the surface active agent is selected from alcohol alkoxylates glycolethersfatty acid alkoxylates, fatty amine alkoxylates, or fatty amide alkoxylates, alkoxylates of phenols or alkylsubstituted phenols, block copolymers or random copolymers of ethylene oxide and propylene oxide, alkoxylates of alkine-alcohols or alkine-diols, alkoxylates of castor oil, alkoxylates of sorbitan fatty acid esters and mixtures thereof.
BG Free format text: Examples of block copolymers of ethylenoxide and propylene oxide are the products sold under the Pluronics trademark like: The surfactant can be a blend of all classes of alkoxylated surface active substances described previously. Particularly suitable examples are esters of ethylenically unsaturated carboxylic acids and polyols or polyepoxides, and polymers having ethylenically unsaturated groups in the chain or in side groups, for example unsaturated polyesters, polyamides and polyurethanes and copolymers thereof, alkyd resins, polybutadiene and butadiene copolymers, polyisoprene and isoprene copolymers, polymers and copolymers containing meth acrylic groups in side chains, and also mixtures of one or more such polymers.
The photoinitiator is of the radical type. Assessed were handling, incorporation, curing efficiency and yellowing visual.
Benzene, (1-methylethenyl)-, homopolymer, ar-(2-hydroxy-2-methyl-1-oxopropyl) derivs.
They often require longer times of mixing until a uniform distribution and dissolution has been achieved. In addition it is also possible to employ vinyl ether monomers on oligomers, and also maleate-terminated oligomers with polyester, polyurethane, polyether, polyvinyl ether and epoxy main chains. The term “homogenous liquid blend” generally describes a substance in a liquid phase, without the presence of a secondary droplet or particle phase that could separate.
The following water-based formulation was prepared WB-Formulation The inventive homogeneous liquid blend is obtainable by a process comprising the steps of. The unsaturated compounds may include one or more olefinic double bonds. Also preferred are non-ionic surfactants derived from ethoxylates wsacure vegetable oils or animal fats, such as corn oil ethoxylate, castor oil ethoxylate, tallow oil ethoxylate.
Examples of suitable alkoxylated liquid surface active agents include also compounds in which a straight or branched C 1 -C 22 alkyl chain is connected through the residue of a linking group as defined above to multifunctional alcohols like trimethylolpropane, sugar derivatives like sorbitan esters, triglycerides like castor oil and the like.
US20120035292A1 – Liquid photoinitiator blend – Google Patents
Also preferred are non-ionic surfactants derived from ethoxylated esters of fatty acids with glycerine or sorbitan, such as polyoxyethylene glycerine monostearate, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan-monostearate, polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan tristearate, polyoxyethylene sorbitan trioleate.
The term also refers to block-copolymers or random copolymers of ethylene oxide and propylene oxide. The formulations were stirred for a total of 15 min.
DK Free format text: As an aqueous dispersion there still remain disadvantages in that the photoinitiator particles may settle on prolonged storage and that the aqueous onr is incompatible to many non-aqueous UV-systems.
It has now been found that mixing a photoinitiator of the radical type with a liquid surface active agent, and optionally with an organic diluent esxcure to a homogenous liquid blend with a high content of photoinitiator and which is stable at room temperature. The sorbitan seacure are sold oe the tradename Tween, like polyoxyethylene 20 sorbitan monolaurate Tween 20polyoxyethylene 20 sorbitan monopalmitate Tween 40polyoxyethylene 20 sorbitan monostearate Tween 60polyoxyethylene 20 sorbitan tristearate Tween 65polyoxyethylene 20 sorbitan monooleate Tween 80polyoxyethylene 20 sorbitan trioleate Tween Visually, no difference in yellowing could be observed.
Examples of monomers containing a double bond are alkyl or hydroxyalkyl acrylates or methacrylates, for example methyl, ethyl, butyl, 2-ethylhexyl or 2-hydroxyethyl acrylate, isobornyl acrylate, methyl methacrylate or ethyl methacrylate. In the following the photoinitiator refers to its inventive liquid blend delivery form, not to the active content. LI Free format text: The product form is a clear, colorless to yellow liquid.
The acrylate peak at approx. The European Patent EP Lamberti discloses an aqueous dispersion comprising a photoinitiator and a surfactant.