摘要:
A silicone rubber sponge composition, a silicone rubber sponge, and a process for production thereof. The silicone rubber sponge composition, comprises (A) 100 parts by weight organopolysiloxane gum described by average structural unit RaSiO(4−a)/2, where R is a monovalent hydrocarbon group or haloalkyl and a is 1.8 to 2.3 and having a viscosity at 25° C. of 1,000,000 mPa·s or above, (B) 1 to 400 parts by weight inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles, (D) 0.1 to 10 parts by weight thermally decomposable blowing agent, and (E) a curing agent in an amount sufficient to cure the composition.
摘要:
A silicone rubber sponge composition, a silicone rubber sponge, and a process for making a silicone rubber sponge. The silicone rubber sponge composition comprises (A) 100 parts by weight of an organopolysiloxane gum described by average structural unit RaSiO(4−a)/2, where R is a monovalent hydrocarbon radical or haloalkyl and a is 1.95 to 2.05, (B) 1 to 400 parts by weight of an inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles (D) a mixture of (a) water-soluble silicone and (b) water in an amount such that the water in the mixture is equivalent to 0.01 to 10 parts by weight per 100 parts by weight of component (A), and (E) a curing agent in an amount sufficient to cure the composition.
摘要:
A silicone rubber composition comprising (A) 100 weight parts of a polydiorganosiloxane mixture comprising (i) 1 to 99 wt % polydiorganosiloxane having at least two silicon atom-bonded vinyl groups per molecule and (ii) the remaining percentage of polydiorganosiloxane having at least two non-vinyl silicon atom-bonded alkenyl groups per molecule, (B) a polyorganosiloxane having at least two silicon atom-bonded hydrogen atoms per molecule, (C) 0.1 to 10 weight parts of a silatrane derivative described by general formula where each R1 group is independently selected from the group consisting of a hydrogen atom and alkyl groups; each R2 group is independently selected from the group consisting of a hydrogen atom, alkyl groups, and alkenyloxyalkyl groups described by the general formula —R4—O—R5 where R4 is an alkylene group, and R5 is an alkenyl group; at least one R2 group is an alkenyloxyalkyl group; and R3 is a group selected from the group consisting of substituted and unsubstituted monovalent hydrocarbon groups, C1 to C10 alkoxy groups, glycidoxyalkyl groups, oxiranylalkyl groups, acyloxyalkyl groups, and aminoalkyl groups; and (D) a platinum type catalyst in an amount sufficient to cure the composition.
摘要:
A liquid silicone rubber composition for use in high-voltage eletrical insulating parts comprising (A) a polyorganosiloxane containing alkenyl groups, (B) fumed silica, (C) a polyorganohydridosiloxane, (D) a platinum type catalyst, (E) finely powdered aluminum hydroxide, and (F) a powdered metal compound selected from the group consisting of powdered zinc oxidc, powdered zinc borate, and powdered magnesium hydroxide and a method for manufacturing such a composition.
摘要:
The instant invention pertains to a liquid silicone rubber coating composition for application to air bags that is comprised of (A) a diorganopolysiloxane having at least 2 alkenyl groups in each molecule, (B) an organopolysiloxane resin, (C) an inorganic filler, (D) an organohydrogenpolysiloxane having at least 2 silicon-bonded hydrogen atoms in each molecule, (E) a platinum group metal catalyst, and (F) an epoxy group-containing organosilicon compound. The liquid silicone rubber coating composition of the instant invention is capable of coating synthetic air bag fabrics without the use of a diluting solvent and at the same time that has an excellent adhesion to and infiltrability into synthetic air bag fabrics.
摘要:
A curable liquid silicone rubber coating composition is disclosed. The curable composition of the invention exhibits excellent infiltrability and can be used to for thin coatings on synthetic fabrics, without using a dilution solvent. The cured composition is tackfree coating film with excellent adherence to synthetic fabrics. The curable composition includes: (A) a diorganopolysiloxane that contains at least 2 alkenyl groups in each molecule; (B) an organopolysiloxane resin; (C) an inorganic filler; (D) an organohydrogenpolysiloxane that contains at least 2 silicon-bonded hydrogen atoms in each molecule; (E) a platinum group catalyst; (F) an epoxy-functional organosilicon compound; and (G) an organotitanium compound.
摘要:
A silicone rubber composition is prepared by mixing a diorganopolysiloxane which contains 0.1 to 5 weight % of low-molecular-weight organosiloxane with a vapor pressure at 200.degree. C. of at least 10 mm Hg, with at least 90 weight % of a low-molecular-weight organosiloxane with a boiling point not exceeding 250.degree. C. at 760 mm Hg and a curing agent with filler being optional. These silicone rubber compositions are useful for silicone rubber moldings which can be used to in applications involving electrical switch contacts resulting in electrical switch contact conduction free of defects.
摘要:
The silicone rubber obtained by curing in the presence of a platinum-containing catalyst a composition comprising an organopolysiloxane containing a plurality of lower alkenyl radicals and a organohydrogensiloxane consisting essentially of R.sub.3 SiO.sub.1/2 units, R.sub.2 SiO units, RHSiO units, and RSiO.sub.3/2 units in a specified molar ratio is uniquely suitable as the coating material for the press roll in the fixing assembly of an electrophotographic copier.
摘要:
A rubber made from a blend of EPDM or EPR and a polydiorganosiloxane gum has strength, heat resistance, and adhesiveness to room-temperature, moisture-curable silicone rubber. The rubber is made from a blend of EPDM or EPR, polydiorganosiloxane gum, a polyorganosiloxane containing aliphatic hydrocarbon radicals of 4 to 20 carbon atoms, a polyoxyalkylene-organosiloxane copolymer or a poly(hydroxyalkyl)organosiloxane, and an organic peroxide.
摘要:
What is disclosed is a curable organopolysiloxane composition based on the platinum catalyzed silicon hydride addition to unsaturated groups on silicon, cure system. The novel feature is the use of a silane to enhance the adhesion of the curable material to many substrates. The silane has the general formula ##STR1##