A polysiloxane composition which is curable by condensation, contains at least one hydroxyl-terminated polyorganosiloxane, at least one diacetoxysilane optionally bearing an alkoxy group, at least one multifunctional alkoxysilane, at least one filler, and at least one catalyst.

A polysiloxane composition which is curable by condensation, contains at least one hydroxyl-terminated polyorganosiloxane, at least one diacetoxysilane optionally bearing an alkoxy group, at least one multifunctional alkoxysilane, at least one filler, and at least one catalyst.

A curable organopolysiloxane composition is provided. The curable organopolysiloxane composition comprises: (A) an organopolysiloxane having at least two alkenyl groups per molecule; (B) an organosiloxane having one silicon atom-bonded hydrogen atom per molecule and free of alkenyl groups and silicon atom-bonded alkoxy groups; (C) an organosiloxane having one silicon atom-bonded hydrogen atom and at least one silicon atom-bonded alkoxy group per molecule and free of alkenyl groups; (D) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms per molecule and free of alkenyl groups and silicon atom-bonded alkoxy groups; (E) a hydrosilylation reaction catalyst; and (F) a condensation reaction catalyst. The curable organopolysiloxane composition can be cured to form a cured product. The cured product generally exhibits an excellent adhesion property against various substrates without cracking and delamination occurring after a thermal shock test.

A curable organopolysiloxane composition is provided. The curable organopolysiloxane composition comprises: (A) an organopolysiloxane having at least two alkenyl groups per molecule; (B) an organosiloxane having one silicon atom-bonded hydrogen atom per molecule and free of alkenyl groups and silicon atom-bonded alkoxy groups; (C) an organosiloxane having one silicon atom-bonded hydrogen atom and at least one silicon atom-bonded alkoxy group per molecule and free of alkenyl groups; (D) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms per molecule and free of alkenyl groups and silicon atom-bonded alkoxy groups; (E) a hydrosilylation reaction catalyst; and (F) a condensation reaction catalyst. The curable organopolysiloxane composition can be cured to form a cured product. The cured product generally exhibits an excellent adhesion property against various substrates without cracking and delamination occurring after a thermal shock test.

A transparent coating film forming composition contains: (A) a polysilazane having units represented by the following formulae (1) and (2), and having predetermined modification rate and weight average molecular weight, ##STR00001##
(B) an organic solvent containing (B-1) and (B-2), (B-1) an organic solvent having a dielectric constant of 2.1 to 15.0 on average and a higher boiling point under atmospheric pressure (1013 hPa) than that of an organic solvent contained as the component (B-2), and (B-2) a saturated aliphatic hydrocarbon organic solvent; and (C) a predetermined curing catalyst. The mixing ratio of the component (A) and the component (B) satisfies a predetermined range. This provides a transparent coating film forming composition using an organic solvent having high polysilazane solubility, volatility at an appropriate speed during application, high safety and workability, the composition enabling formation of a coating film that is uniform and has high transparency and hardness after curing.

A transparent coating film forming composition contains: (A) a polysilazane having units represented by the following formulae (1) and (2), and having predetermined modification rate and weight average molecular weight, ##STR00001##
(B) an organic solvent containing (B-1) and (B-2), (B-1) an organic solvent having a dielectric constant of 2.1 to 15.0 on average and a higher boiling point under atmospheric pressure (1013 hPa) than that of an organic solvent contained as the component (B-2), and (B-2) a saturated aliphatic hydrocarbon organic solvent; and (C) a predetermined curing catalyst. The mixing ratio of the component (A) and the component (B) satisfies a predetermined range. This provides a transparent coating film forming composition using an organic solvent having high polysilazane solubility, volatility at an appropriate speed during application, high safety and workability, the composition enabling formation of a coating film that is uniform and has high transparency and hardness after curing.

One of the purposes of the present invention is to provide an emulsion composition which is stable over time and gives, upon drying, a coating with good slipping property. Another purpose of the present invention is to provide an emulsion composition containing a reduced or, in particular, zero amount of octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane as impurities. The present invention provides an aqueous dispersion comprising an emulsion comprising a silicone which is a condensation reaction product of the following components (A-1) and (B): (A-1) a linear organopolysiloxane being an addition reaction product of (a1) a linear organopolysiloxane having two alkenylsilyl groups each only at each of molecular terminals and (a2) a linear organopolysiloxane having two hydrosilyl groups each only at each of molecular terminals, provided that a ratio of the number of the hydrosilyl group in component (a2) to the number of the alkenylsilyl group in component (a1) is 0.98 to 2; 5 to 40 parts by mass of (B) a hydrolysable silane having at least three groups selected from the group consisting of a silanol group and an alkoxy group in one molecule, relative to 100 parts by mass of component (A-1); 0.1 to 20 parts by mass of (A-2) a surfactant, relative to 100 parts by mass of component (A-1); and 10 to 200 parts by mass of (A-3) water, relative to 100 parts by mass of component (A-1).

Provide herein is an ink that can be coated onto a substrate such as a glass slide. The use of at least two distinct wax treated silica powders with different porosities provides the multipurpose functionality of thermal and inkjet printing onto an ink coated substrate for purposed, for example, of labeling.

Provide herein is an ink that can be coated onto a substrate such as a glass slide. The use of at least two distinct wax treated silica powders with different porosities provides the multipurpose functionality of thermal and inkjet printing onto an ink coated substrate for purposed, for example, of labeling.

An adhesive comprising a getter material and optionally a solvent comprising a catalyst activatable by means of an external stimulus for the reaction of the getter material with a permeate can tolerate brief contact with permeates such as moisture in particular before user application, without any significant impairment of getter capacity.