Abstract: The present invention provides a silicone antifoaming agent composition excellent in the persistence of the foam controlling effect. The silicone antifoaming agent composition comprises a polydiorganosiloxane and silica, which form an antifoaming agent to be improved, and 4 to 2,500 parts by weight per 100 parts by weight of the sum total of the polydiorganosiloxane plus silica of a modified silicone oil having at least one organic group bonded to a silicon atom and having at least one functional group selected from among epoxy, amino, amide, carboxyl, alkoxyl and hydroxyl groups and at least one substituted or unsubstituted polyoxyalkylene group bonded to a silicon atom.

Abstract: The specification describes and claims a paste-like preparation comprising (A) a paste-like base comprising a polyorganosiloxane and a water-soluble polymeric material which are preferably present in a ratio by weight from 3:6 to 6:3 and (B) an active ingredient.

Abstract: The present invention provides a silicone antifoaming agent composition excellent in the persistence of the foam controlling effect. The silicone antifoaming agent composition comprises a polydiorganosiloxane and silica, which form an antifoaming agent to be improved, and 1 to 200 parts by weight per 100 parts by weight of the sum total of the polydiorganosiloxane plus silica of a lightly crosslinked siloxane having fluidity.

Abstract: The present invention relates to a method of producing polyvinyl alcohol hydrogel characterized by the following features: the production process consists of a low-temperature processing stage in which the solution of polyvinyl alcohol with a polymerization degree over 1200 is processed at a low temperature so that polyvinyl alcohol is gelated, and a high-temperature processing stage in which the polyvinyl alcohol gelated int he low-temperature processing stage is dried, then processed at higher than 100.degree. C.; in this way, polyvinyl alcohol hydrogel with a saturated water content lower than 40 wt % is obtained. The hydrogels of this invention are useful for providing improved artificial articular cartilage for replacement of cartilage in the human body.

Abstract: A solid silicone defoaming agent which includes a mixture of silicone oil having a viscosity of at least 20 centistokes at 25 degrees Centigrade and microparticulate silica, a copolymer selected from the group consisting of polyoxyalkylene and polyoxyalkylene/polysiloxane copolymers, and a wax selected from the group consisting of a water-insoluble wax which is insoluble in water at room temperature and which has a melting point of at least 35 degrees Centigrade, and a water-soluble wax which dissolves and disperses in water at room temeprature and which has a melting point of at least 30 degrees Centigrade.

Abstract: An antimicrobial agent which is a carboxyl group containing amine compound. The compound has the characteristics of an amphoteric surfactant and is silyl group containing. The compound is prepared by reacting an amine, a silane, and a carboxylic acid.

Abstract: In a through-the-cannula catheter placement system, a catheter is used which comprises a body portion and a tip portion at one end of the body portion. The body portion has a double-wall structure. The outer wall is a tube of pliable, nonthrombogenic material. The inner wall is a reinforcing tube of a material having sufficient resilience to avoid collapse during use. The tip portion is also made of a pliable nonthrombogenic material. The tip may be an extension of the outer wall.