Nippon Oil Fats Co., Ltd.

Terumo Kabushiki Kaisha

Yoshihiro Oshibe

Hiroshi Ohmura

Kazuhiko Hagiwara

Takashi Yamamoto

Masaharu Nakayama

Yasuhiro Yamamoto

Keiji Kumazawa

Hiroshi Kitoh

Hisao Yamamoto

Shigeki Banno

Michihisa Yamada

Toshihiro Izumi

Hideki Doya

Hitoshi Kitoh

Yoshimasa Nakagawa

The blood flow channel sections of an oxygenator and a blood resevoir are hydrophilized by treatment with an acid, an albumin solution, polyhydroxy methacrylate, corona discharge, plasma or ozone, so that it has highly improved weltability by the priming liquid and the blood to prevent blood foaming. The blood flow channel sections of a medical instrument may be additionally hydrophilized by treatment with a polymer containing hydroxyethyl methacrylate and methyl methacrylate or in addition thereto a poly(oxyethylene)-poly(oxypropylene) block polymer.

Medical instrument

The blood flow channel sections of an oxygenator and a blood resevoir are hydrophilized by treatment with an acid, an albumin solution, polyhydroxy methacrylate, corona discharge, plasma or ozone, so that it has highly improved wettability by the priming liquid and the blood to prevent blood foaming. The blood flow channel sections of a medical instrument may be additionally hydrophilized by treatment with a polymer containing hydroxyethyl methacrylate and methyl methacrylate or in addition thereto a poly(oxyethylene)-poly(oxypropylene) block polymer.

The present block copolymer contains a structural unit (A) derived from a compound represented by the general formula (I): CH.sub.2 .dbd.CR.sub.1 COOR.sub.2 R.sub.f, and also contains a structural unit (B) consisting of a polymer moiety represented by at least one of the structural formulae (III) and (IV) and another polymer moiety derived from a compound represented by the general formula (II): CH.sub.2 .dbd.CR.sub.3 R.sub.4. For preparing the above block copolymer, a block copolymer consisting of the structural unit (A) derived from a compound represented by the general formula (I): CH.sub.2 .dbd.CR.sub.1 COOR.sub.2 R.sub.f and the structural unit (B1) derived from a compound represented by the general formula (II): CH.sub.2 .dbd.CR.sub.3 R.sub.4 and a compound represented by the general formula (V): CH.dbd.CR.sub.6 COO(R.sub.9).sub.t H are reacted with a compound represented by the general formula (VI): R.sub.10 COCl to allow a dehydrochlorination reaction to take place. Thus, an unsaturated group and fluorine containing block copolymer having excellent water and oil repellent properties and excellent sensitivity to activation energy rays can be prepared. The block copolymer is utilized as a surface modifier for activation energy-curing resins.

Unsaturated group and fluorine containing block copolymers, process for

An ultraviolet curing antifogging agent is disclosed. The composition includes block copolymer (a) having a hydrophilic polymer segment (a1) and a hydrophobic polymer segment (a2). A polar solvent (c) is provided in which the hydrophilic polymer segment (a1) can easily be dissolved while the hydrophobic polymer segment (a2) can not. It further includes a photopolymerizable compound (b), and a photopolymerization initiator (d). The block copolymer (a) contains at least one hydrophilic monomer selected from the group of: a (meth) acrylamide compound represented by the general formula: CH.sub.2 .dbd.CR.sub.1 CONR.sub.2 R.sub.3 ; a cyclic (meth)acrylamide compound represented by the general formula ##STR1## and a hydroxyalkyl (meth)acrylate. Further, the hydrophilic polymer segment (a1) is formed by a radically polymerizable monomer having a functional group such as glycidyl group. The hydrophobic polymer segment (a2) is formed by a radically polymerizable monomer and a hydrophobic monomer which is copolymerizable with the former radically polymerizable monomer. The weight ratio of the hydrophilic polymer segment (a1) to the hydrophobic polymer segment (a2) is 50/50 to 95/5. The photopolymerizable compound (b) can be represented by the general formula CH.sub.2 .dbd.CR.sub.1 COO(CH.sub.2 CR.sub.4 HO).sub.n OCCR.sub.1 .dbd.CH.sub.2. The weight ratio of the component (a) to the component (b) is in the range of 10/90 to 90/10 in terms of the solid content. Such compositions have excellent antifogging properties and can be applied to transparent plastic materials to prevent fogging.

Composition of ultraviolet curing antifogging agent and process for

The blood flow channel sections of an oxygenator and a blood reservoir are hydrophilized by treatment with an acid, an albumin solution, polyhydroxy methacrylate, corona discharge, plasma or ozone, so that it has highly improved wettability by the priming liquid and the blood to prevent blood foaming. The blood flow channel sections of a medical instrument may be additionally hydrophilized by treatment with a polymer containing hydroxyethyl methacrylate and methyl methacrylate or in addition thereto a poly(oxyethylene)-poly(oxypropylene) block polymer.

An anti-fogging resin film-forming composition, comprising a block or graft copolymer and a surfactant, each of which block and graft copolymers consists of a hydrophilic polymer segment and a hydrophobic polymer segment having specifically limited monomer compositions, is disclosed. A coating film formed on a matrix surface from the composition has a durable excellent anti-fogging property and having high adhesion to the matrix surface and high strength.

Anti-fogging resin film-forming composition

A cured unsaturated polyester resin or vinyl ester resin having excellent water resistance, weather resistance, stain resistance and anti-block property can be obtained by curing an unsaturated polyester resin or vinyl ester resin together with a fluorine-containing block copolymer consisting of a polymer portion having fluorine-containing groups and a polymer portion compatible with the unsaturated polyester resin or vinyl ester resin.

Cured unsaturated polyester resin or vinyl ester resin containing

The surface of a polymer material is modified by adding to the material a block copolymer. The block copolymer has a hydrophilic polymer portion and a polymer portion which is compatible with the polymer material to be modified. The block copolymer can be easily synthesized in the presence of a polymeric peroxide and can easily and permanently modify the surface of the polymer material.

Method for modifying the surface of polymer materials

The surface of a polymer material is modified by adding to the material a block copolymer. The block copolymer has a hydrophilic polymer portion and a polymer portion which is compatible with the polymer material to be modified. The block copolymer can be easily syntheized in the presence of a polymeric peroxide and can easily and permanently modify the surface of the polymer material.

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Aichi, Japan

Yoshihiro Oshibe