摘要:
Perfluoropolyether compositions are provided comprising (A) a linear perfluoropolyether compound containing at least two alkenyl groups, having a perfluoropolyether structure comprising recurring units —CaF2aO— in its backbone, and having a Mw of 10,000-100,000; (B) an organosilicon compound containing at least two silicon atom-bonded hydrogen atoms; (C) a reinforcing filler; (D) a hydrosilylation catalyst; and (E) a polyfluoromonoalkenyl compound containing one alkenyl group and having a perfluoropolyether structure in its backbone. The compositions cure into rubber or gel products having improved acid resistance.
摘要:
This invention provides a silicone resin composition giving a silicone cured rubber exhibiting a higher elongation percentage as well as improved heat resistance, oil resistance and chemical resistance, which are particularly required for automobile applications. A silicone cured rubber meeting the above physical property requirements can be prepared by moisture-curing a silicone resin composition including 100 wt parts of (a) an OH-containing polysiloxane, 0.1 to 200 wt parts of (b) a carbodiimide and (c) an organosilicon crosslinking agent, or alternatively by thermally curing a silicone resin composition including 100 wt parts of (a) an OH-containing polysiloxane, 0.1 to 200 wt parts of (b) a carbodiimide and (d) an amino-containing silane.
摘要:
A silicone rubber coating composition which cures into a silicone rubber having a tear strength of 25-50 kN/m and a peeling bond strength of 30-60 N/cm is suited for coating of hollow weave type air bags. A hollow weave type air bag coated with the coating composition can be instantaneously inflated while the bag prevents the silicone rubber film from being peeled from the base fabric, eliminates inflating gas leakage, and retains an acceptable inflation time.
摘要:
The present invention provides a strippable film coating mixture that includes a resin component having an acrylic polymer and a polyvinyl polymer, wherein the acrylic polymer comprises from about 20% to about 40% by weight of the mixture and the polyvinyl polymer comprises from about 10% to about 30% by weight of the mixture. The strippable film coating mixture also includes a moisture repellent/release agent comprising from about 0.3% to about 0.6% by weight of the mixture, a surface release agent comprising from about 0.3% to about 2% by weight of the mixture, and a plasticizer comprising from about 1% to about 3% by weight of the mixture with a remainder of the weight of the mixture comprising an aqueous medium ranging from about 45% to about 60% by weight of the mixture.
摘要:
This invention provides a wiring-terminal-connecting adhesive comprising a curing agent capable of generating a free radical upon heating, a radically polymerizable substance and silicone particles, and a wiring-terminal-connecting method and a wiring structure which make use of such an adhesive.
摘要:
A resin composition for an optical part, which contains (A) a polyarylene sulfide, (B) a modified polyphenylene ether, (C) a non-fibrous filler and (D) a fibrous filler, and which may further contain (E) a non-crystalline resin having a glass transition temperature of 180° C. or higher and/or (F) a coupling agent. The optical axis deviation of optical parts such as an optical pickup, an optical housing, etc., formed by molding this resin composition for an optical part is small, so that they can be used in laser-applied OA machines, and the like.
摘要:
A room temperature curable organopolysiloxane composition comprising (A) an organopolysiloxane having organooxysilyl groups on side chains or on side chains and ends of the polymer, (B) fumed silica, (C) an organooxysilane or a partial hydrolytic condensate thereof, and (D) a condensation catalyst is improved in stability during storage under sealed conditions and cures into an elastomeric product whose physical properties change little even when used under rigorous conditions as encountered in proximity to automotive engines.
摘要:
The present invention provides a rubber composition that improves processability and fuel efficiency without decreasing mechanical strength and abrasion resistance, which are excellent properties of natural rubber, and a pneumatic tire using the rubber composition for a tire tread. Specifically, the present invention provides a rubber composition for a tire tread comprising 5 to 150 parts by weight of silica having nitrogen-adsorbing specific surface area of 100 to 300 m2/g and/or 5 to 150 parts by weight of carbon black having nitrogen-adsorbing specific surface area of at least 70 m2/g and dibutyl phthalate oil absorption of at least 70 ml/100 g, based on 100 parts of a rubber component containing 5 to 100% by weight of a deproteinized natural rubber having a weight average molecular weight of 1,400,000 and nitrogen content of at most 0.1% by weight, and a pneumatic tire comprising the rubber composition for a tire tread.
摘要:
A water-borne fluoroelastomer composition comprising an aqueous dispersion of a fluoroelastomer polymer, from about 2 to about 30 parts by weight per one hundred parts by weight of polymer of a curative system, said curative system having been formed by blending from about 6 to about 94 parts by weight of a stabilized siloxane and from about 94 to about 6 parts by weight of a non-stabilized silane, where said stabilized siloxane and said non-stabilized silane total about one hundred parts by weight of the curative system, from 0 to about 40 parts by weight of an additive filler per one hundred parts by weight of polymer, and sufficient water to provide a composition having a solids content of from about 10 to about 80 percent by weight of the total composition.
摘要:
This invention describes the use of novel blocked mercaptosilanes, wherein the hydrogen atom of the mercaptan functionality has been substituted, in filled polymers. The blocked mercaptosilanes described are unique in that they allow the mixing of fillers with organic polymers to proceed while remaining inert toward coupling to the polymer. The coupling reactions of these blocked mercaptosilicon compounds are triggered by addition of an appropriate deblocking agent, which preferably is tetramethylthiuram monosulfide.