Knowledge base

Free radical chemistry is still the most widely used UV curable system. There are a wide range of raw materials and applications available to the formulator and end user to achieve the desired properties for their film. During UV curing in air, the presence of oxygen can have a detrimental effect on the cure response of free radical systems - espec

With UV irradiation, maleimide derivatives are known to dimerize through triplet exited 2 Utilizing this dimerization, photosensitive polymers with pendant maleimide moiety have been investigated in chemicalindustries. Recentry, un-substituted maleimide derivatives were found to initiate photo-induced polymerization of multi-functional acrylate(MFA

Highly oriented polymers exhibit anisotropy in optical, electric and thermomechanical properties.Polymerization of liquid crystal (LC) monomers has been conducted extensively to obtain polymer LCs (PLCs). LC monomers can be macroscopically aligned by external forces such as electric and magnetic fields, elongational flow, and surface alignment. The

UV curable organic-inorganic hard-coats, containing functionalized nanosized silica dispersed inorganic solvents, can be used to provide, plastic substrates with abrasion and chemical resistance. We have investigated the influence of some parameters that influence the properties of the cured coatings. In order to optimize abrasion resistance, the p

Cyclopropenium salts have attracted considerable attention since they represent the smallest two-rr-electron Huckel aromatic systems. Since the first cyclopropenium ion, triphenylcyclopropenium (TPCP), was 4 numerous others have been 5 and their reactions have received considerable 6 The only report on the photochemistry of triphenylcyclopropenium

Waterbased systems are commonly used in the coating industry because of environmentalconcerns and they are becoming increasingly popular, even in a solvent-free technology Iike UVradiation curing. Indeed, by taking water to reduce the formulation viscosity one avoids the odor and irritation problems inherent to the use of acrylic reactive diluents.

Paper is a very complex material, especially coated grades. It's not just fibres, but also a lot of other components like calcium carbonate latex binders, optical bleaching agents and a variety of chemistry which is necessary for the paper making and coating process. In each stage of the printing and finishing process different paper problems

 Abstract: a new cationic photoinitiátor, 4-isobutylphenyl-4'-methylphenyliodonium hexafluorophosphate (Dl-3), exhibits very high efficiency in the UV-curing of thick -pigmented coatings. 1-chloro-4-propoxythioxanthone was found to be superior to isopropylthioxanthone as a sensitizer. Application results are discussed.