摘要:
A room temperature curable organopolysiloxane composition is provided. The composition comprises (I) an organopolysiloxane which is a condensation product of component (A) (an organopolysiloxane comprising R3SiO1/2 unit and SiO4/2 unit and containing 0.02 to 0.12 mol/100 g of hydroxy group bonded to the silicon atom) and component (B) (a diorganopolysiloxane raw rubber having hydroxy group on opposite ends thereof), (II) an organosilane compound having at least 2 hydrolyzable groups bonded to the silicon atom on average per molecule, and/or its partial hydrolytic condensate, (III) a solvent, and (IV) a silica nano particle having its surface modified by a branch structure. The composition is capable of providing a high strength film without incorporating reinforcement fillers, with no curing inhibition by the inorganic nano particles, and without inhibiting gas separation performance realized by the inorganic nano particles.
摘要:
An oily surface adhesive room temperature curing type organopolysiloxane composition includes: (A) at least one of organopolysiloxanes represented by specific general formulas; (B) heavy calcium carbonate of which the surfaces have been treated with a fatty acid and/or paraffin treating agent; (C) an oil-absorbing carbon powder; (D) a silane represented by a specific general formula or a partial hydrolyzate; (E) a curing catalyst; and (F) an organic compound having one isocyanate group in its molecule.
摘要:
A two-part organopolysiloxane composition is provided. A first part comprises (A) an organopolysiloxane, (B) a ketene silyl acetal compound or 2-methyldialkoxysilylpropionic ester, (C) an organic compound or silane compound having at least one nitrogen atom, (D) a silane compound having at least two alkoxy groups, and (E) another ketene silyl acetal compound or 2-trialkoxysilylpropionic ester. A second part comprises (F) an organopolysiloxane, (G) an organotin catalyst, and (H) water. The first and second parts are mixed to form a sealing composition which is fast curable to the depth with alcohol removal.
摘要:
A room temperature-curable polyorganosiloxane composition is provided. This composition contains (a) a polydiorganosiloxane represented by the following general formula (1) or (2): wherein R is a monovalent hydrocarbon group, a is an integer of at least 10, R1 is a monovalent hydrocarbon group, X is oxygen atom or a divalent hydrocarbon group, and n is an integer of 1 to 3; (b) a triorganosilanol represented by general formula (3): R23SiOH (3) wherein R2 is a monovalent hydrocarbon group; (c) an organosilane containing at least 3 hydrolyzable groups in one molecule and/or its partial hydrolysate; and (d) a calcium carbonate.
摘要:
A room temperature curable organopolysiloxane composition comprising (A) a diorganopolysiloxane, (B) an alkoxysilane compound and/or a partial hydrolytic condensate thereof, (C) a curing catalyst, and (D) an organic compound having at least one fatty acid ester radical —OC(═O)CH2R3 (wherein R3 is H or a monovalent hydrocarbon radical) and 0, 1 or 2 hydroxyl radicals effectively cures to glass and fluoropolymer-coated aluminum without a need for primer and has storage stability in a sealed package.
摘要:
A room temperature curable organopolysiloxane composition is provided. This composition comprises (A) a diorganopolysiloxane endcapped at both ends of the molecular chain with hydroxy group represented by the following formula: HO—(R2SiO)n—H wherein R represents a monovalent hydrocarbon group, and n represents an integer of at least 10, (B) an organopolysiloxane comprising R13SiO1/2 unit, R12SiO2/2 unit, and R1SiO3/2 unit wherein R1 represents a monovalent hydrocarbon group, and SiO4/2 unit with the proviso that molar ratio of R13SiO1/2 unit to SiO4/2 unit is in the range of 0.6 to 1.2, molar ratio of R12SiO2/2 unit to SiO4/2 unit and molar ratio of R1SiO3/2 unit to SiO4/2 unit are both in the range of 0 to 1.0, and content of the silanol group is less than 1.5% by weight, (C) surface treated fumed silica, (D) a silane and/or its hydrolysate containing at least two hydrolyzable groups in the molecule, and (E) a curing catalyst.
摘要:
A room temperature-curable organopolysiloxane composition is provided. The composition comprises (A) 100 parts by weight of a organopolysiloxane represented by the following general formula (1): wherein R is a monovalent hydrocarbon group containing 1 to 5 carbon atoms, R1 is independently a substituted or unsubstituted monovalent hydrocarbon group containing 1 to 10 carbon atoms; n is an integer of at least 10; X is oxygen atom or an alkylene group containing 2 to 5 carbon atoms, and m is independently an integer of 0 or 1; or a mixture of such organopolysiloxane; (B) 50 to 150 parts by weight of a colloidal calcium carbonate having a specific surface area measured by BET method of at least 10 m2/g; (C) 100 to 200 parts by weight of a heavy calcium carbonate having a specific surface area measured by BET method of up to 8 m2/g; (D) 1 to 25 parts by weight of an organosilicon compound having at least 3 hydrolyzable groups bonded to silicon atom in one molecule represented by R2aSi(OR3)4-a wherein R2 is a monovalent hydrocarbon group containing 1 to 12 carbon atoms, R3 is a monovalent hydrocarbon group containing 1 to 5 carbon atoms, and a is 0 or 1; or its partial hydrolysate; and (E) 0.01 to 10 parts by weight of a curing catalyst. The mass ratio of the component (B) to the component (C) is less than 1.
摘要:
A room temperature-curable polyorganosiloxane composition is provided. The composition comprises(A) 100 parts by weight of a polyorganosiloxane represented by the following general formula (1): wherein R is a monovalent hydrocarbon group containing 1 to 5 carbon atoms, R1 is independently a substituted or unsubstituted monovalent hydrocarbon group containing 1 to 10 carbon atoms; n is an integer of at least 10; X is oxygen atom or an alkylene group containing 2 to 5 carbon atoms, and m is independently an integer of 0 or 1; or a mixture of such polyorganosiloxane,(B) 0.1 to 50 parts by weight of a partial hydrolysate of an organosilicon compound having at least 3 hydrolyzable groups bonded to silicon atom in one molecule;(C) 1 to 500 parts by weight of at least one filler,(D) 0.01 to 10 parts by weight of a curing catalyst, and(E) 0.1 to 10 parts by weight of a silane coupling agent.The present invention is capable of forming a rubber elastomer which exhibits excellent adhesion to resins whose adhesion has been difficult, for example, polyimide resin.
摘要:
RTV organopolysiloxane compositions comprising (A) a diorganopolysiloxane having hydroxyl or alkoxysilyl groups at both ends, (B) a polyoxypropylene-modified silicone, (C) wet silica, and (D) a silane or siloxane having at least three silicon-bonded hydrolyzable groups have improved sag control and cure at room temperature into products with improved rubber physical properties and durability.
摘要:
An anti-fouling condensation curing organopolysiloxane composition is provided comprising in admixture, (A) 100 parts by weight of a base polymer in the form of a diorganopolysiloxane having at least two silicon atom-bonded hydroxyl or hydrolyzable groups in a molecule, at least 2 mol % of entire substituent groups being phenyl groups, (B) 0.5 to 30 parts by weight of a silane having at least two hydrolyzable groups or a partial hydrolytic condensate thereof, and (C) 5 to 100 parts by weight of a non-reactive dialkylpolysiloxane. The composition cures at room temperature to form a coating which is non-toxic, non-detrimental to the environment, and effective for preventing aquatic organisms from depositing and growing thereon over a long term.