The present invention relates to a polyorganosiloxane and a moisture and radiation curable adhesive composition comprising the same, in particular, to a polyorganosiloxane and a moisture and radiation curable adhesive composition used in a liquid optical clear adhesive (LOCA) for handheld device and display (HHDD).

A method for surface treatment of a silicone rubber includes: providing the silicone rubber bearing a polar group on a surface of the silicone rubber, and applying a multifunctional compound to the surface of the silicone rubber bearing the polar group to allow the multifunctional compound to react with the polar group to form a coating.

A curable polyorganosiloxane composition includes (a) a polyorganosiloxane having two or more curable functional groups per molecule; (b) a crosslinking agent having per molecule two or more crosslinkable groups having reactivity with the curable functional groups of the component (a); (c) a curing catalyst capable of catalyzing a crosslinking reaction of the component (a) and the component (b); (d) a pigment which itself does not emit a fluorescent light; and (e) a UV tracer. The composition can be used as an adhesive.

Diphthalonitrile compounds of formula I:

##STR00001##

in free or salt or solvate form, wherein: Ar.sup.1 is a C.sub.6-C.sub.10-aryl group; Ar.sup.2 is a C.sub.6-C.sub.10-aryl group; R.sup.1 and R.sup.2 are independently C.sub.3-C.sub.10-alkyl; T is a C.sub.6-C.sub.10-aryl group; and n is 0, 1, 2, 3, 4 or 5, or a mixture thereof; Cured diphthalonitrile thermosets are provided by curing resin blends of such compounds.

A room-temperature-curable organopolysiloxane composition; a structure obtained from the composition; and a method for assessing the cured state of the composition are provided. The room-temperature-curable organopolysiloxane composition, which changes in color with the progress of curing from the uncured state, comprises the following ingredients: (A) 100 parts by mass of one or more organopolysiloxanes represented by formula (1)
HO(SiR.sub.2O).sub.nH  (1)
and/or formula (2) ##STR00001##
(with variables as defined herein); (B) 0.1-50 parts by mass of an organosilicon compound having at least three silicon-atom-bonded hydrolyzable groups in the molecule, which is not any of ingredients (A), (C), and (D), and/or a product of the partial hydrolytic condensation of the organosilicon compound; (C) 0.01-20 parts by mass of a curing catalyst; (D) 0.1-10 parts by mass of a silane coupling agent; and (E) 0.01-10 parts by mass of a pH indicator.

Provided are fast curing two-part condensation curable silicone compositions which cure by using titanium and/or zirconium based catalysts to generate cured gel materials which are suitable for encapsulating and/or potting electrical and/or electronic articles.

A silicone particle containing: a dialkylsiloxane unit represented by the following general formula (1), R.sup.4.sub.2SiO.sub.2/2 (1), where, in the formula (1), R.sup.4s each independently represent a monovalent hydrocarbon group having 1 to 6 carbon atoms; and a poly(alkyleneoxyalkyl)methylsiloxane unit represented by the following general formula (2), where, in the formula (2), R.sup.1s each independently represent a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms, R.sup.2s each independently represent a divalent aliphatic group having 1 to 6 carbon atoms, and “n” is a number that satisfies 1≤n≤20, where the silicone particle has an oxyalkylene group in a surface thereof. A silicone particle may be readily dispersed in an aqueous material without the use of a dispersant or a surfactant, the silicone particle having a hydrophilic group.

##STR00001##

A method for producing a coating layer with scratch resistance and flex resistance, a laminated structure, and a coating composition are provided. The method includes coating the coating composition on a plastic substrate and performing a curing operation on the coating composition to form a cured coating layer. The coating composition includes a polyhedral oligomeric silsesquioxane, a multifunctional epoxy resin, a cationic light initiator, and an organic solvent, and the polyhedral oligomeric silsesquioxane has a cage-like structure. The curing operation has a baking temperature that is within a range from 75° C. to 200° C., a baking time that is within a range from 30 s to 120 s, and an UV curing energy that is within a range from 250 mJ/cm.sup.2 to 1,250 mJ/cm.sup.2.

A curable composition is provided that includes an alkenyl phenol A, an epoxy-modified silicone B, an epoxy compound C other than the epoxy-modified silicone B, and a thermosetting resin E, in which the thermosetting resin E contains one or more selected from the group consisting of a maleimide compound, a cyanate ester compound, a phenolic compound, an alkenyl-substituted nadimide compound, and an epoxy compound.

A hard coating composition comprising an adhesion enhancing solvent component, wherein the adhesion enhancing solvent component comprises methoxy-2-propanol (PM) and ethylene glycol butyl ether (EB), a method for improving a single layer hard-coat on a polyester article using the hard coating composition, and a hard coated polyester article are described.