摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
There is disclosed a polishing cloth having an abrasive layer containing a polymer material which is a hydrolyzable with an aqueous medium and being capable of exhibiting a stable polishing performance for a relatively long period of time without necessitating a dressing treatment.
摘要:
There is disclosed a polishing cloth having an abrasive layer containing a polymer material which is a hydrolyzable with an aqueous medium and being capable of exhibiting a stable polishing performance for a relatively long period of time without necessitating a dressing treatment.