Abstract: The present invention provides a perfluoroelastomer seal material in which adhesive strength, contamination, corrosion and color change of a contacted surface with a seal material are improved, and an amount of an uncrosslinked polymer component is at most 1% by weight, measured under specific conditions, and a process for preparing the same. The present invention relates to a perfluoroelastomer seal material, wherein a rate of weight decrease is at most 1% by weight when the seal material is immersed into perfluoro(tri-n-butyl)amine at 60° C. for 70 hours and is dried at 90° C. for 5 hours, 125° C. for 5 hours and 200° C. for 10 hours after taken out of the emersion. And, the present invention also relates to a process for preparing a perfluoroelastomer seal material comprising a step of treating with a solvent having at least 50 % of a swelling rate based on said molded article, when said molded article is immersed at 60° C. for 70 hours.

Abstract: There is provided a compound switch suitable for preventing malfunction as a multidirectional switch caused by an unreasonable turning force applied to a slider, improving the switch operability, and simplifying a switch mounting panel surface. When a transverse push-in force is applied to the operating portion 14, the slider 8 slides in the push-in direction of the operating portion from a fixed position of neutrality, and hence a contact state corresponding to the slide direction can be obtained. When torque for turning the operating portion 14 around the axis thereof is applied to the operating portion 14, the torque is transmitted to an outer base 2 via the slider 8 etc., by which the outer base 2, the slider 8, and the operating portion 14 are rotatingly moved together in the rotation direction of the operating portion 14 from the fixed position of neutrality, and hence a contact state corresponding to the rotation direction can be obtained.

Abstract: The present invention provides a fluorine-containing elastomer composition containing a particular filler, and a molded article excellent in heat resistance obtained by crosslinking the composition. The present invention also provides a process for preparing a fluorine-containing elastomer composition comprising a step of preparing a surface-treated filler by treating a surface of a filler with a hydrophobic treatment agent so as to have a hydrophobization degree of at least 30% which is measured by the particular method.

Abstract: There is provided a fluorine-containing elastomer molded article which is obtained by irradiating the fluorine-containing elastomer molded article with a plasma and has a center line average roughness of not less than 0.65 ?m or a fluorine-containing elastomer molded article which is obtained by applying a resin coating layer on a fluorine-containing elastomer substrate, has a small peeling strength and a small etching rate at the irradiation of plasma and is excellent in detachability and whiteness. There is provided particularly a molded article suitable as various sealing materials for semiconductor production apparatuses.

Abstract: The present invention provides a fluorine containing elastomer composition which does not affect heat resistance and processability, is little in weight change for both of fluorine plasma and oxygen plasma exposed at the production step of a semiconductor and can inhibit generation of foreign objects (particles) significantly in those steps, and a molded article comprising the composition. The present invention relates to a fluorine containing elastomer composition for the seal material of a semiconductor production device comprising a fluorine containing elastomer and a compound having plasma antiaging effects.

Abstract: The compound of the formula (I): wherein W is a group of the following formula (VIII) binding to any possible position on the Q: Q is, together with W, a group of the formula: —C(W)?C(R3A)—N(R3)—, etc.; R3A is H or optionally substituted lower alkyl; R4, R5, R6, and R7 are independently H or optionally substituted lower alkyl; R1 is optionally substituted lower alkyl, etc.; R2 is H, etc.; R3 is H, etc.; Ar is phenyl, etc., or a pharmaceutically acceptable salt thereof, where these compounds exhibiting ?3-adrenoceptor-stimulating activity and being useful as a medicament for treatment of obesity, etc.

Abstract: There is provided a crosslinkable elastomer composition, which has small decrease in weight to all of high concentration F radical irradiation, O2 plasma treatment and fluorine plasma treatment which are conducted in a semiconductor manufacturing process and significant plasma resistance, and a molded article comprising the crosslinkable elastomer composition.

Abstract: There is provided an elastomer composition which is prepared by using a very clean filler reduced in both of an amount of moisture generation and an amount of organic outgas generation and is suitable as a molding material for semiconductor production apparatuses and there is provided a molded article. The composition is a crosslinkable composition comprising a high molecular weight polymer, particularly a crosslinkable fluorine-containing elastomer and a filler which has a weight reduction ratio per unit surface area of not more than 2.5×10?5% by weight/m2 when heating at 200° C. for two hours and a total amount of organic gas generated of not more than 2.5 ppm when heating at 200° C. for 15 minutes. The molded article is produced from the crosslinkable composition.

Abstract: To provide a very clean elastomer molded article excellent in plasma resistance, having excellent property of metal-elution inhibition and is used suitably as a material for molded article for a semiconductor or liquid crystal manufacturing equipment. The molded article is obtained by crosslinking a crosslinkable elastomer composition comprising an elastomer component and a metal oxide filler comprising a silicon oxide filler containing impurity metals other than silicon in an amount of not more than 100 ppm. The molded article has an impurity metal content of not more than 100 ppm, and an increasing rate of particles generated by irradiating oxygen plasma to the article is not more than 1,000% or an amount of impurity metals other than silicon which is extracted with a 50% aqueous solution of HF is not more than 200 ppb.

Abstract: A transparent elastomer composition is obtained by co-coagulation of an emulsion of fluorine-containing resin fine particles having an average particle size of from 20 to 150 nm and an emulsion of elastomer particles, in which the fluorine-containing resin fine particles are finely dispersed uniformly in the elastomer. The transparent elastomer composition provides an elastomeric molded article having excellent mechanical strength, abrasion resistance and transparency.

Abstract: An elastomer composition for crosslinking which comprises (A) a compound having at least two crosslinkable reactive groups represented by the formula (I): wherein R1 are the same or different and each is fluorine atom or a monovalent organic group, and (B) an elastomer having a curing site capable of reacting with the crosslinkable reactive group (I). The composition provides a crosslinked article which possesses improved mechanical strength and heat resistance and has excellent chemical resistance.

Abstract: The present invention provides a crosslinkable elastomer composition, in which generation of HF under high temperature conditions is reduced, the decrease in weight to both NF3 plasma treatment and O3 treatment in the semiconductor manufacturing process is small and generation of foreign substances (particles) in these treatments is suppressed significantly. Specifically, the present invention relates to a crosslinkable elastomer composition comprising a crosslinkable elastomer and a filler having a specific surface area of at least 0.5 m2/g and containing a synthetic polymer having a thermally and chemically stable aromatic ring in the main chain, a crosslinkable elastomer composition comprising a crosslinkable elastomer and nonoxide ceramics and a crosslinkable elastomer composition wherein the decrease in weight by NF3 plasma irradiation is at most 0.20%.

Abstract: A crosslinkable elastomer composition which provides a crosslinked product with improved mechanical strength and heat resistance, comprising, (A) a compound having at least two crosslinkable groups represented by the formula (I): and (B) an elastomer which contains a crosslinking site capable of reacting with the crosslinkable group (I) is prepared.

Abstract: To provide a crosslinkable elastomer composition which is excellent in mechanical properties, ensures a small amount of outgas such as DOP and is suitable as a very clean material for molded article for semiconductor production apparatuses. The composition comprises a crosslinkable elastomer component and ultra fine powders of silicon oxide, in which the ultra fine powders of silicon oxide have 100×1019 or less hydroxyl groups per gram on surfaces thereof, dioctylphthalate adsorption of not more than 8 ?g per 1 g of silicon oxide and an average particle size of not more than 0.5 ?m.

Abstract: Elastomer molded article for semiconductor production apparatuses which is obtained by crosslinking and molding a crosslinkable fluorine-containing elastomer composition comprising a crosslinkable fluorine-containing elastomer component and fine particles of aluminum oxide having an average particle size of not more than 0.5 &mgr;m. The elastomer molded article is excellent in plasma resistance and an amount of micro particles generated after irradiation of plasma is very small and therefore a very clean molded article for semiconductor production apparatuses, particularly a sealing material to be used in an environment of plasma irradiation is provided.

Abstract: A transparent elastomer composition is obtained by co-coagulation of an emulsion of fluorine-containing resin fine particles having an average particle size of from 20 to 150 nm and an emulsion of elastomer particles, in which the fluorine-containing resin fine particles are finely dispersed uniformly in the elastomer. The transparent elastomer composition provides an elastomeric molded article having excellent mechanical strength, abrasion resistance and transparency.

Abstract: A transparent elastomer composition is obtained by co-coagulation of an emulsion of fluorine-containing resin fine particles having an average particle size of from 20 to 150 nm and an emulsion of elastomer particles, in which the fluorine-containing resin fine particles are finely dispersed uniformly in the elastomer. The transparent elastomer composition provides an elastomeric molded article having excellent mechanical strength, abrasion resistance and transparency.

Abstract: To provide a novel crosslinking system of fluorine-containing elastomer giving a crosslinked product particularly having improved mechanical strength and compression set at high temperature. A fluorine-containing rubber composition comprising a fluorine-containing elastomer having carboxyl group and/or alkoxycarbonyl group at an end of a trunk chain and/or branched chain as a crosslinkable group.

Abstract: A carbon black filler for crosslinkable elastomer composition having a content of impurity metals of not more than 300 ppm and a pH value of 5.0 to 11.0. The filler can be obtained by subjecting a starting carbon black filler to extraction treatment with an acid to reduce a content of impurity metals of the filler and then alkali treatment with an alkali to neutralize a remaining acid. The filler does not cause a crosslinking failure even when added to an elastomer composition and can provide an elastomer molded article suitable as a very clean sealing material for semi-conductor production apparatuses.

Abstract: To provide a packaging material being capable of maintaining a highly clean state, wherein the number of fine particles having a particle size of not less than 0.2 &mgr;m and being present on its surface facing an article to be packaged is not more than 5,000/cm2, a steam permeation degree at 40° C. at 90% RH is not more than 30 g/cm2·24 hr, a total amount of gas (excluding steam) to be generated when heating at 80° C. for 15 minutes is not more than 5 ppm and a total amount of water to be generated when heating at 80° C. for 30 minutes is not more than 13 ppm.