Abstract: A curable composition comprising (A) a fluorinated organic silicon compound of the formula: Z—R1—Rf—R1—Z wherein Rf is a divalent fluorinated polyether group, R1 is a divalent hydrocarbon group, and Z is a silyl or siloxane group terminated with OH, (B) an organic silicon compound as a crosslinking agent, and (C) a condensation accelerator is curable to depth at room temperature even in the absence of moisture.

Abstract: A linear polyfluoro compound having at least two alkenyl groups as a base component is blended with a linear polyfluoro compound having one alkenyl group and a hydrosilyl-bearing linear polysiloxane having fluoroalkyl substituents in side chains and at ends thereof. With a platinum catalyst added, there is obtained a curable composition having improved storage stability which will quickly cure into satisfactory gel products.

Abstract: An addition-curable composition is comprised essentially of (A) a linear perfluoro compound containing at least two alkenyl groups per molecule and having a perfluoro structure in its backbone chain, (B) a linear perfluoro compound containing one alkenyl group per molecule and having a perfluoro structure in its backbone chain, (C) an organosilicon compound containing at least two hydrosilyl groups per molecule, and (D) a platinum family metal catalyst. A cured gel product obtained from the composition has a penetration of 1 to 200 (ASTM D-1403 using 1/4-scale cone). The composition can form a fluorine-containing cured gel product excellent in chemical resistance and solvent resistance, and low in moisture permeability.

Abstract: A room temperature curable fluoropolymer composition is provided which comprises (A) a straight chain fluoropolymer compound containing, in its backbone chain, at least one structure selected from a perfluoroalkylene structure and a perfluoropolyether structure and having a hydrolyzable silyl group at both ends of its molecular chain, (B) an organic compound having at least one carbonyl group per molecule, and (C) one compound selected from (C-1) an organic compound having at least one primary amino group per molecule and (C-2) a compound having at least one proton per molecule and having an acid dissociation constant (pKa) in water of 2 or less. Another room temperature curable composition is also provided which comprises said (A) component, (B') an organosilicon compound having at least two silanol groups per molecule, and (C') a condensation accelerator.

Abstract: Fluorinated amide compounds of formula (1) wherein Rf is a perfluoroalkyl or perfluoropolyether group having 1 to 800 carbon atoms, R is hydrogen, methyl or phenyl, and letter a is 1, 2 or 3 are novel and useful as a modifier intermediate capable of improving various properties of silicone and liquid fluororubber.

Abstract: A room temperature curable fluoropolymer composition is provided which comprises (A) a straight chain fluoropolymer compound containing, in its backbone chain, at least one structure selected from a perfluoroalkylene structure and a perfluoropolyether structure and having a hydrolyzable silyl group at both ends of its molecular chain, (B) an organic compound having at least one carbonyl group per molecule, and (C) one compound selected from (C-1) an organic compound having at least one primary amino group per molecule and (C-2) a compound having at least one proton per molecule and having an acid dissociation constant (pKa) in water of 2 or less. Another room temperature curable composition is also provided which comprises said (A) component, (B') an organosilicon compound having at least two silanol groups per molecule, and (C') a condensation accelerator.

Abstract: Curable fluoropolyether rubber composition: This composition comprises (A) a straight chain fluoropolyether compound having at least two alkenyl groups in its molecule and having a divalent perfluoropolyether structure in its backbone chain, (B) a polytetrafluoroethylene, (C) an organohydrogenpolysiloxane having at least two hydrogen atoms bonded to silicon atoms in its molecule, and (D) a hydrosilylation reaction catalyst. The composition is provided in the form of a paste capable of forming into optional shapes, and its cured product is well-balanced in and is excellent in properties such as heat resistance, chemical resistance, solvent resistance, releasability, lubricating qualities, water repellency, oil repellency and weatherability.

Abstract: A water-absorptive soft contact lens comprising a polymer prepared by polymerizing a monomer mixture comprising (A) a fluorine-containing styrene derivative represented by the general formula (I): ##STR1## wherein R.sup.1 is hydrogen atom or methyl group, m is an integer of 1 to 3 and n is 0 or an integer of 1 to 7, and (B) N, N-dimethyl(meth)acrylamide. The water-absorptive soft contact lens has excellent oxygen permeability, high mechanical strength and excellent flexibility independent of water content.

Abstract: A room temperature curable fluoropolymer composition is provided which comprises (A) a straight chain fluoropolymer compound containing, in its backbone chain, at least one structure selected from a perfluoroalkylene structure and a perfluoropolyether structure and having a hydrolyzable silyl group at both ends of its molecular chain, (B) an organic compound having at least one carbonyl group per molecule, and (C) one compound selected from (C-1) an organic compound having at least one primary amino group per molecule and (C-2) a compound having at least one proton per molecule and having an acid dissociation constant (pKa) in water of 2 or less. Another room temperature curable composition is also provided which comprises said (A) component, (B') an organosilicon compound having at least two silanol groups per molecule, and (C') a condensation accelerator.

Abstract: A water-absorptive soft contact lens comprising a polymer prepared by polymerizing a monomer mixture comprising, as main components, (A) 25 to 75% by weight of a (meth)acrylamide monomer, (B) 20 to 70% by weight of a fluoroalkyl (silicon-containing alkyl) fumarate, and (C) 0.01 to 10% by weight of a crosslinkable monomer. The water-absorptive soft contact lens has excellent oxygen permeability and high mechanical strength independent of water content, and is excellent in transparency and shape stability.

Abstract: In a curable composition comprising (A) a fluorinated amide compound, (B) a fluorinated organohydrogensiloxane having at least one monovalent perfluorooxyalkyl, monovalent perfluoroalkyl, divalent perfluorooxyalkylene or divalent perfluoroalkylene group, and at least two hydrosilyl groups in a molecule, and (C) a platinum catalyst is blended a tackifier (D) in the form of an organosiloxane having at least one hydrogen atom directly attached to a silicon atom and at least one epoxy or trialkoxysilyl group attached to a silicon atom through a carbon atom or a carbon atom and an oxygen atom. The composition cures into a cured product which exhibits satisfactory properties and firmly bonds to metallic and plastic substrates by brief heating at low temperature.

Abstract: A novel and very efficient method is disclosed for the introduction of perfluoroalkyl groups into an organopolysiloxane by utilizing the hydrosilation reaction with an organohydrogenpolysiloxane. Different from the conventional but inefficient hydrosilation reaction using a perfluoroalkyl-substituted ethylene as the olefin compound, the inventive method utilizes a propene-1 3-substituted by a perfluoroalkyl group compound as the olefin compound to react with an organohydrogenpolysiloxane by which a very high efficiency in the hydrosilation reaction can be obtained without side reactions which otherwise greatly decrease the yield of the desired perfluoroalkyl-containing organopolysiloxane product.

Abstract: A fluorine-containing compound represented by the following general formula (1): ##STR1## wherein A represents a group --CH.sub.2 --CH.dbd.CH.sub.2 or a group ##STR2## in which R represents a hydrogen atom or an alkyl group. The compound is useful as an intermediate for producing various compounds and can introduce perfluorocyclic ether groups into various polymers to give such properties as chemical resistance, water repellency, oil repellency, and weather resistance to the polymers.

Abstract: Hexafluoropropylene oxide (HFPO) compounds, including polymers, expressed by the general chemical formula (1) below: ##STR1## wherein R.sup.1 is a single bond, an alkylene group of 1 to 10 carbon atoms, or said alkylene group in which a part of, or all of, the hydrogen atoms are substituted by fluorine atoms, Rf is a fluorine atom, a perfluoroalkyl group of 1 to 10 carbon atoms, or a perfluoroalkyl ether group, and n is 0 or an integer of at least 1. A manufacturing method for the HFPO compounds which is characterized by the reaction between hexafluoropropylene oxide and a vinyl group containing compound, expressed by the general chemical formula (2) below: ##STR2## wherein R.sup.1 and Rf are same as above. The compounds have utility as important intermediate raw materials for the production of novel functional silicone compounds having HFPO polymer units.

Abstract: Novel siloxane compounds having a fluorinated group, an SiH group reactive with silicone resins, and an epoxy-bearing organic group attached to a silicon atom, each in a backbone, are effective for providing adhesion and are useful tackifiers for various resins.

Abstract: A primer composition comprising (A) a fluorinated alkoxysilane containing an epoxy group, (B) an organic titanium or aluminum compound, and (C) a solvent is effective in bonding fluorinated organic polymers to metal and glass members.

Abstract: A fluorine-containing organosilicon compound having the formula (1): ##STR1## wherein X is a hydrolizable group, R.sup.1 is a monovalent organic group, R.sup.2 is a methyl group or a hydrogen atom, n is an integer of 1, 2 or 3, and m is an integer of 0 or 1, and a process of producing said compound. The compound may be used as a silane coupling agent capable of improving not only the strength of laminated sheets of polyester resin and glass and polyester resin concrete but also water and heat resistances.

Abstract: The present compound is a novel perfluoropolyether represented by the following general formula: ##STR1## wherein m is an integer of 1 to 3 and n is an integer of 2 to 6. This compound is quite useful as an inert liquid used as a heat transfer mediums in the filed of electronic materials.

Abstract: Provided are novel cyclic perfluoroethers which are thermally and chemical stable fluids. They are prepared by photo decarbonylation of cyclic perfluoroketones.

Abstract: An epoxy resin composition comprising an epoxy resin, a curing agent and an inorganic filler is adapted for semiconductor encapsulation. A fluorinated organic silicon compound is blended in the composition as a coupling agent whereby the composition is improved in adhesion and moisture resistance.