An epoxy-functionalized polyorganosiloxane toughener providing toughening properties for thermosetting resins is described. The epoxy-functionalized polyorganosiloxane toughener is an epoxy-functionalized siloxane polyether with a siloxane backbone, at least one epoxy-containing alkyl chain, and at least one alkoxyl polyether chain, each said at least one epoxy-containing alkyl chain and at least one alkoxyl polyether chain grafted to the siloxane backbone. Also disclosed is a thermosetting resin-based composition comprising the epoxy-functionalized polyorganosiloxane toughener of claim 1 and at least one of an epoxy resin, a hardener, and an accelerator.

There is provided herein a process for the synthesis of sulfonyl silanes. There is also provided herein various sulfenylated and sulfonylated silicon-containing compounds made by the process.

A method for producing a carbinol-modified organosiloxane, which comprises steps (A) to (C), is an efficient production method whereby it becomes possible to reduce the production of a by-product of the reaction for the production of a terminal-carbinol-modified organosiloxane. (A) a step of supplying the following components (a) to (c) to a tubular reactor continuously: (a) an organohydrogensiloxane represented by formula (I) ##STR00001## (wherein R.sup.1's independently represent a monovalent hydrocarbon group having 1 to 20 carbon atoms; and m represents an integer of 0 to 500); (b) a compound represented by formula (II):
R.sup.2—Z—OH (wherein R.sup.2 represents a vinyl group or an allyl group; and Z represents a bivalent hydrocarbon group); and (c) a platinum catalyst in an amount of 0.005 ppm by mass or more and less than 1.0 ppm by mass in terms of metal platinum content relative to the total amount of the components (a) to (c); (B) a step of subjecting the components (a) to (c) to a hydrosilylation reaction while allowing these components to pass through the tubular reactor; and (C) a step of removing a reaction product.

An aqueous dispersion along with methods for producing and uses for the same. Where the aqueous dispersion includes crosslinkable reactive silicone organic copolymers of ethylenically unsaturated monomers and of ethylenically functionalized silicone polymers and is obtainable by means of radically initiated miniemulsion polymerization in an aqueous medium.

A modified polysiloxane has formula (I) ##STR00001##
In formula (I) m is an integer between 0 and 10000; n is an integer between 0 and 10000; m and n cannot be equal to 0 simultaneously; R.sub.1-R.sub.7 are the same or different; and at least one of R.sub.1-R.sub.7 includes a group having a reversible chemical bond system based on a hydrogen bond, a coordinate bond, or a covalent bond. The polysioxane is used as a main chain to introduce a reversible chemical bond having temperature sensitivity by using a chemical method, so as to obtain a polymer material which is highly sensitive to temperature. The temperature-sensitive properties of materials provide functional materials for specific applications, such as medical external fixation materials, orthopedic materials, and packaging materials, can be obtained by using particular processing and preparation methods.

A coating composition is provided herein, wherein the coating composition includes an organic binder and a polyorganosiloxane, optionally with a hardener. There is also provided a process for making the same coating composition.

A coating composition is provided herein, wherein the coating composition includes an organic binder and a polyorganosiloxane, optionally with a hardener. There is also provided a process for making the same coating composition.

A reaction composition contains (a) an allyl polyether having the following formula: CH.sub.2=CHCH.sub.2O-A.sub.a-B where, (i) subscript a is 2 to 170; (ii) A is selected from: —CH.sub.2CH.sub.2O—; —CH.sub.2CH(CH.sub.3)O—; —CH(CH.sub.3)CH.sub.2O—, CH.sub.2CH(CH.sub.2CH.sub.3)O—; —CH(CH.sub.2CH.sub.3)CH.sub.2O, —CH.sub.2CF(CF.sub.3)O—, —CF(CF.sub.3)CF.sub.2O— and —CF.sub.2CF(CF.sub.3)O—; and (iii) B is selected from —H, —CH.sub.3, —CH.sub.2CH.sub.3, —CH.sub.2CH.sub.2CH.sub.3, —CH.sub.2CH.sub.2CH.sub.2CH.sub.3, —C(O)CH.sub.3, and —CF.sub.2CF.sub.2CF.sub.3; (b) A silyl hydride functional siloxanc comprising the following siloxane units [R.sub.2HSiO.sub.1/2].sub.m[R.sub.2SiO.sub.2/2].sub.d[R.sub.2SiO.sub.3/2].sub.t[SiO4/2].sub.q wherein d+t+q is one or more and wherein: (i) R is selected from hydrocarbyl groups liaing from one to 8 carbon atoms; (ii) subscript m is 2 or more; (iii) subscript d is zero to 20; (iv) subscript t is zero to 2; (v) subscript q is zero to 2; and (c) a platinum-based hydrosilylation catalyst; where there are at least 4 molar equivalents of silyl hydride functionalities relative to allyl functionalities in the reaction composition.

Through the present invention, by undergoing a step in which a straight-chain diorganopolysiloxane having silanol groups at both terminal ends of the molecular chain thereof, a hydrolyzable silane and/or a partial hydrolysis condensate thereof having a hydrolyzable group capable of detaching a lactic acid ester, and an amino-group-containing hydrolyzable organosilane and/or a partial hydrolysis condensate thereof are pre-mixed/reacted in advance and silanol groups at both terminal ends of the molecular chain of a main agent (base polymer) are blocked by specific hydrolyzable silyl groups, it is possible to manufacture a lactic-acid-ester-type room-temperature-curable organopolysiloxane composition excellent in all characteristics including curability, adhesive properties, workability, and the like that were not attainable by the conventional lactic-acid-ester-type room-temperature curable (RTV) silicone rubber composition.

A one-part low modulus room temperature vulcamsable (RTV) silicone composition comprising a titanate and/or zirconate catalyst which cures to a low modulus silicone elastomer which has a good adhesion profile and may be used as a non-staining (clean) sealant having high movement capability which compositions contains an aminosilane adhesion promoter having two hydroxyl or hydrolysable groups per molecule in an amount of 0.1-3.75% by weight of the composition.