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.
摘要:
An organopolysiloxane composition for bonding to magnesium alloys comprises (A) 100 parts by weight of an organopolysiloxane of the following general formula (1) and/or (2) wherein R may be the same or different and represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and n is an integer of at least 10, X represents an oxygen atom or an alkylene group having 2 to 5 carbon atoms, and m independently represents an integer of 0 or 1, (B) 0.1 to 50 parts by weight of an organosilicon compound having at least three hydrolyzable groups bonded to silicon atoms in one molecule and/or a partial hydrolyzate thereof, and (C) 0.1 to 15 parts by weight of an acidic silane coupling agent.
摘要:
A room temperature curable organopolysiloxane composition is provided. It includes (A): a diorganopolysiloxane containing 2 hydroxyl groups or hydrolysable groups bonded to silicon atoms within each molecule; (B): (B1) an amine compound of the general formula (2): R1NH2 (2) (wherein, R1 represents a monovalent hydrocarbon group of 12 to 30 carbon atoms), and/or an amine compound of the general formula (3): H2N—R2—NH2 (3) (wherein, R2 represents a bivalent hydrocarbon group of 4 to 30 carbon atoms), or (B2) a compound which, via a hydrolysis reaction, is capable of yielding an amine compound of (B1); (C) a cross-linking agent; and (D) a curing catalyst. The composition, following curing, generates a silicone rubber to which a coating can be easily applied, and in which that coating is not easily removed.
摘要:
An anti-fouling condensation curing organopolysiloxane composition is provided comprising in admixture, (A) 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) a silane having at least two hydrolyzable groups or a partial hydrolytic condensate thereof, and (C) a non-reactive diorganopolysiloxane. 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.
摘要:
A silicone rubber coating composition comprising (A) an organopolysiloxane, (B) an organosilicon compound having at least three hydrolyzable groups or a partial hydrolyzate thereof, and (C) aluminum hydroxide surface treated with a silane, siloxane or silazane is coated onto the surface of an insulator body to form a high-voltage electric insulator film which maintains the stabilized electrical properties of silicone rubber over a long term even in the ambient environment.
摘要:
By curing a curable organopolysiloxane composition comprising an organopolysiloxane and photocatalytic particles, typically of titanium oxide, there is obtained a rubber member. A surface of the rubber member can be rendered hydrophilic or non-staining by irradiating UV radiation to the surface. The rubber member is thus useful as a building seal, coating and gasket.
摘要:
A room temperature curable rubber composition of a condensation curing type that comprises as a base polymer a diorganopolysiloxane or a polyoxyalkylene in which both ends of the molecular chain are blocked with a hydrolyzable silyl group, and a carbonyl compound, an amino group containing organic compound, and an .alpha.,.beta.-unsaturated carbonyl compound that are blended with the base polymer. Since the room temperature curable rubber composition is cured with water in the air and at the same time the dehydration condensation of the carbonyl group and the amino group produces water in the composition, the quick curability and deep curability are improved remarkably.
摘要:
A condensation-curing type curable composition which comprises a diorganopolysiloxane or polyoxyalkylene blocked by hydrolyzable silyl group at both terminal ends of its molecular chain as a base polymer, in which a carbonyl group-containing organic compound and an amino group-containing organic compound are compounded. This composition is capable of forming water through dehydration condensation between carbonyl and amino groups, simultaneously with curing of the composition by moisture in air. The formation of water offers marked improvements in fast-curing property and also in depth curing property.
摘要:
A room temperature-curable organopolysiloxane composition capable of giving a highly oil-resistant cured silicone rubber is disclosed. The composition comprises, as the essential ingredients, a hydroxy-terminated diorganopolysiloxane, an iminoxysilane compound as a crosslinking agent, an organotin compound as a catalyst and, as an oil-resistance improver, a combination of zinc carbonate and zinc hydroxide in a powdery form of which the content of zinc hydroxide is, different from conventional basic zinc carbonate, 5 to 50% by weight. By virtue of this unique ingredient, the composition is also advantageous in respect of the high storage stability.