Daikin Industries, Ltd.

Daikin Kogyo Co., Ltd.

Other

Tokyo Shibaura Denki Kabushiki Kaisha

The United States of America As Represented by the Secretary of

501 Daikin Industries, Ltd.

Shigeru Saito

Toshiharu Yagi

Yoshito Tanaka

Masayoshi Tatemoto

Yoshihide Higashihata

Junichi Sako

Tsuyoshi Noguchi

Nobuhiko Tsuda

Kohsaku Sakaguchi

Hiroshi Inukai

Noboru Yamazaki

Attila E Pavlath

Hiromichi Sakuma

Jouji Saito

Nobuyuki Tomihashi

Shoji Kawachi

Yoshiki Shimizu

Naonori Enjo

Shigeaki Kurata

Akiyoshi Kondo

Akitoshi Komiya

Kouji Fukuyama

Masato Kagami

Torahiko Nagano

Eiichi Fukada

Takashi Nishioka

Sumiko Yubara

Shigeaki Kuratas

Minako Inomata

a fluorine-containing block copolymer comprising at least one soft segment which comprises chlorotrifluoroethylene and vinylidene fluoride and at least one hard segment which comprises a fluorine-containing crystalline polymer, which copolymer has good flexibility and transparency and useful as a material for an artificial lens.

Fluorine-containing block copolymer and artificial lens comprising the

A vibration-proof damping polymer material characterized in that the material is prepared from a polymer substance obtained by dissolving an amorphous fluorine-containing polymer in an acrylic monomer and polymerizing the monomer with or without permitting the resulting polymer to form an interpenetrating polymer network, and a vibration-proof damping polymer material characterized in that the material is prepared from a blend of (a) and (b), (a) being an amorphous fluorine-containing polymer or crystalline polymer containing vinylidene fluoride, and (b) being an acrylic polymer.

Vibration-proof damping polymer material

The present invention provides a coating composition which comprises (a) a polymer containing vinylidene fluoride, (b) an acrylic polymer and (c) acetylacetone, as essential components, and an article which is coated or impregnated with the coating composition.

Coating composition

A mastication measurement apparatus is provided with a displacement detecting element such as a piezoelectric element and a holder which keeps the detecting element in close contact with a part of the side of one's face. The apparatus is capable of processing electric signals produced by the detecting element to measure the number of masticating cycles, number of masticating cycles per unit time, a maximum value of the mastication force and the mastication energy, and is also capable of checking whether a denture is matched to a subject by detecting noises included in the output of the detecting element. In accordance with the invention, it is also possible to determine which teeth are not used during the mastication of food by attaching the detecting elements to both sides of a face and comparing the outputs from both detecting elements.

Mastication detector and measurement apparatus and method of measuring

In an adhesive composition for biomaterial use, a composition characterized by comprising as a main component a compound represented by the formula ##STR1## wherein A is H, F or CH.sub.3, B is fluoralkyl group having 1 to 20 carbon atoms.

Adhesive composition for biomaterial use

A dental material comprising a copolymer which comprises at least 10% by weight of a polymeric unit of at least one of the following monomers: ##STR1## wherein R.sup.1 and R.sup.2 are each H, CH.sub.3 or CF.sub.3, R.sup.3 is H, CH.sub.3 or F, A is --CH.sub.2 --, --CH.sub.2 CH.sub.2 --, --CH.sub.2 CH(CH.sub.3)--, --CH(OH)--, --CH.sub.2 CH(OH)CH.sub.2 --, --CH(OCOCH.sub.3)--or --CH.sub.2 CH(OCOCH.sub.3 (CH.sub.2 --, A' is the same group as A or --CH.sub.2 CH.sub.2 CH.sub.2 --, 2 is an alkylene group having 2 to 10 carbon atoms, m and n are each zero or a number of 1 to 5, p is a number of 1 to 3, q is a number of 1 to 5, provided that at least one of R.sup.1 and R.sup.2 is CF.sub.3 when R.sup.3 is H or CH.sub.3.

Dental material

A denture base at least a part of which comprises a thermoplastic fluoroelastomer exhibits excellent characteristics as a denture base and particularly as a relining material for a denture base.

Denture base

The present invention provides an impression composition of the alginate type which comprises (a) an alginate, (b) calcium sulfate and/or lead silicate, and (c) a filler as its main components and which is characterized in that the alginate component comprises in combination an alginate having a distribution of molecular weights in a lower range and an alginate having a distribution of molecular weights in a higher range.

Impression composition

A solubilizer for water-insoluble aliginates consisting essentially of a salt which releases fluorine ions when dissolved in water, an aqueous solution of the solubilizer and a dissolving method with use of the aqueous solution are described.

Solubilizer for water-insoluble alginates, aqueous solution thereof and

A non-electrification polymeric composite material composed of 60-95% by weight of a copolymer of perfluoro(alkyl vinyl ether) and tetrafluoroethylene (PFA), 1-10% by weight of electrically conductive carbon, and 5-20% by weight of carbonaceous fiber powder. The weight ratio of the electrically conductive carbon contained in the polymeric composite material to the carbonaceous fiber powder also contained in the material in from 1/9 to 7/4, preferably from 2/8 to 5/5. The polymeric composite material is especially suitable as a semiconductor holder, particularly for semiconductor wafers.

Non-electrification polymeric composite material

A polymeric composite heating element comprising a composition composed of a vinylidone fluoride-trifluoroethylene copolymer containing 30-85 mole % of vinylidene fluoride and 3-35% by weight based on the weight of the copolymer of electrically conductive carbon mixed in this copolymer.

Polymeric composite heating element

A polymeric dielectric material comprising a terpolymer which comprises 30 to 90% by mole of VdF, 5 to 70% by mole of TrFE and 0.1 to 20% by mole of HFP, having large permittivity, which is improved by heat treatment.

Polymeric dielectric material

A process for preparing a polymeric piezoelectric material which comprises a vinylidene fluoride containing polymer, comprising applying at least two cycles of alternate electric field except a rectangular wave to the material to polarize it, by which process, the polymeric piezoelectric material is prepared at a low temperature for a short time.

Process for preparing polymeric piezoelectric material

A process for the surface fluorination of a carbon containing synthetic or natural polymer capable of forming a carbon-fluoride bond on fluorination, in a glow discharge reactor, utilizing inorganic fluorides as the fluorination agent.

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Toyonaka, Japan

Toshiharu Yagi