Kuraray Co., Ltd.

Other

Kyoichiro Shibatani

Junichi Yamauchi

Ikuo Omura

Yoshinori Nagase

Makoto Yano

Kiyoo Shimada

Eiichi Masuhara

Nobuo Nakabayashi

Tooru Wada

Tsutomu Makimoto

Motohiro Fukuda

Toshihide Nakashima

Hayami Yoshimochi

Yasuzo Kirita

Shuzo Yamashita

Toshiyuki Zento

Yukihiro Fujieda

Masayasu Ogushi

Kunitake Yamada

Kiyokazu Imai

Chuck Bates

Kiochi Takakura

Eiji Ikeguchi

A balloon catheter and its pilot balloon system visually indicate the state of the inflation of a balloon placed in a human body. The small pilot balloon is conveniently manufactured by blow molding utilizing substantially the same material and has substantially the same structure as the main balloon. The pilot balloon is useful for a catheter with balloon or a tube with cuff where the balloon or the cuff is made of a very resilient material. The preferred material is a blend of composition having certain properties comprising styrenic thermoplastic elastomer and polyolefin.

Pilot balloon for balloon catheters

A gas sensor which includes a reference electrode deposited on the surface of a pH-sensitive transducer having a gate-insulated field-effect transistor (FET) structure and adjacent a gate region of the FET, the transducer and reference electrode being housed in a flexible tube so that the gate region of the FET is located in an opening provided at the front end of or on the side wall of the tube. Lead wires connected to the FET and to the reference electrode extend along the tube. Between the inner wall of the tube and lead-wire FET bonding part is placed electrical insulation resin filling to stop the tube. A hydrophilic polymer layer containing electrolyte is provided which at least extends over both the FET gate region and a part of the reference electrode. A gas permeable membrane is laid over the polymer layer.

Gas sensor with pH-sensitive FET transducer

A cement composition which comprises a filler, a binder to be used in admixture with the filler, and a curing agent for polymerizing the binder, which is characterized by that the binder comprises, based on the total weight of the binder, 20-100% by weight of (A) a free-radical polymerizable monomer of the following formula: ##STR1## wherein R is a hydrogen atom or a methyl group and X is an organic residue having 1-48 carbon atoms, and 0-80% by weight of (B) a mono-, di- or tri-functional free-radical polymerizable monomer which is copolymerizable with the above monomer (A) is disclosed. By using the above binder, the filler is firmly bonded with each other and gives a cured product having high compressive strength and abrasion resistance. The cement composition is especially useful as dental restorative materials.

Method for filling tooth cavities employing a polymerizable urethane

An electrical circuitry for use in the measurement of the activity of ions in an electrolyte solution carried out by the use of an ion-sensitive field-effect transistor transducer having a gate or ion sensitive layer, a source and a drain. The measurement is carried out by adjusting the drain current flowing through the field-effect transistor to a predetermined value such that the temperature dependency of the electroconductivity of the channel of the transistor becomes equal to the sum of the temperature dependency of the potential at an interface between a reference electrode and the electrolyte solution and the temperature dependency of the potential at an interface between the ion-sensitive layer and the electrolyte solution.

Method and device for compensating temperature-dependent characteristic

An adhesive cementing agent is provided for the hard tissues of the human body, which contains a phosphoric or phosphonic acid ester compound containing at least one polymerizable functional group and either a group of the formula ##STR1## or a group of the formula ##STR2## or a high molecular weight compound obtainable by polymerizing the compound either alone or as a comonomer unit. This adhesive cementing agent has a high affinity for the tooth, bone and other hard tissues of the human body and enjoys prolonged stability in wet environments.

Adhesive cementing agents for the hard tissues of the human body

Cement compositions

A caries detector, comprising a solution of a dye selected from the group consisting of Phloxine B (CI 45410), Phloxine BK (the corresponding dipotassium salt of CI 45410), Acid Red (CI 45100), Fast Acid Magenta (CI 17200), Fast Green FCF (CI 42053) and Rhodamine B (CI 45170) in a solvent.

Dental caries detection

The present invention provides a dental material comprising a polymerizable methacrylate monomer mixture and a curing agent, said polymerizable methacrylate monomer mixture containing a compound represented by the formula ##STR1## wherein R is H or methyl and n is integer of 1-4, in an amount of 5-50% by weight based on the whole polymerizable monomer mixture. Said dental material is useful as a filling material, a dental adhesive primer, and a pit and fissure sealant.

Dental material

Materials for forming a hydrogel when contacted with water having improved anti-thrombogenic properties and a highly improved mechanical strength are obtained by the copolymerization of a free radical-polymerizable vinyl monomer capable of forming a hydrophilic polymer and a hydrophobic macromolecular compound having a chain-terminated polymerizable double bond and a molecular weight of 1,000 to 100,000.

Hydrophilic-hydrophobic graft copolymers for self-reinforcing hydrogels

A chemical sensitive field effect transistor transducer is provided having a semipermeable membrane on the surface of a chemical selective system overlying an insulated gate field effect transistor. Such a field effect transistor transducer is effective for the measurement of chemical constituents of factory waste water containing micro-particles, saliva or blood containing proteins, etc., where conventional devices give unreliable results.

Selective chemical sensitive field effect transistor transducers

A reference electrode of an insulated gate field effect transistor having the surface of the gate region thereof coated with a hydrophobic organic polymer membrane. Since this reference electrode is much smaller in size than conventional reference electrodes, an integrated measurement system can easily be constructed by using this reference electrode. This measurement system is especially effective for measuring various ions in the living body.

Reference electrode of insulated gate field effect transistor

A dental filling agent is provided, which contains a phosphoric or phosphonic acid ester compound containing at least one polymerizable functional group and either a group of the formula ##STR1## or a group of the formula ##STR2## or a high molecular weight compound obtainable by polymerizing the compound either alone or as a comonomer unit. This agent has a high bonding affinity for the tooth and enjoys prolonged stability in wet environments.

Dental filling material

A tooth cavity is filled by applying to the walls of the tooth cavity a lining composition comprising a phosphoric or phosphonic acid ester compound containing at least one radical polymizerable vinyl group and at least one ##STR1## group, wherein said lining composition contains said phosphoric or phosphonic acid ester compound in a proportion of not less than 0.1 weight percent, as phosphorus, and then filling the remainder of the cavity with a dental filling material which comprises a polymerizable monomer, a filler and a curing agent.

Method of filling a tooth cavity

An adhesive composition is provided for hard human tissues which contains 0.1 to 10 weight percent as phosphorus of a phosphinic acid compound having the ##STR1## structure. This adhesive composition provides an intimate bond with hard human tissues such as tooth, bone, etc. and has prolonged stability under wet conditions.

Adhesive composition with improved bonding affinity for hard human

An adhesive composition is provided for the hard tissues of the human body which comprises (1) a radical-polymerizable monomer and a curing system comprising (2) a peroxide, (3) an amine (or its salt) and (4) a salt of a sulfinic acid. The composition is available in two independent packages, one of which contains (1) and (2) the other package (3) and (4). Alternatively, one package contains (1) and (3) the other package (2) and (4).

Growing community of inventors

Kurashiki, Japan

Kyoichiro Shibatani