Abstract:
Provided are: a method for producing particles by suspension polymerization, the method having exceptional monomer dispersion stability and also making it possible to simplify a cleaning step; composite particles that can be obtained by this production method; and the use of these composite particles. This method for producing composite particles includes a step for conducting the aqueous suspension polymerization of a monomer mixture containing a polymerizable vinyl monomer in the presence of small polymer particles having a volume-average particle size of 20-500 nm with water-soluble celluloses adsorbed to the surface, and obtaining composite particles that contain these small polymer particles and large polymer particles larger than these small polymer particles.
Abstract:
In a method for producing composite particles containing polymer particles and silica particles that adhere to the polymer particles, the composite particles are obtained by subjecting a polymerizable monomer to aqueous suspension polymerization in a presence of silica particles and a cellulose compound adsorbing onto the silica particles. The composite particles contain the polymer particles, the silica particles that adhere to surfaces of the polymer particles, and the water-soluble cellulose compound.
Abstract:
PROBLEM TO BE SOLVED: To provide an elastic hydrogel having a high tensile strength.SOLUTION: The provided hydrogel includes a polymer matrix, a polyvinyl alcohol polymer, water, and a polyalcohol. The polymer matrix consists of a copolymer of a monofunctional monomer possessing one intramolecular polymerizable carbon-carbon double bond and a crosslinkable monomer possessing two or more intramolecular polymerizable carbon-carbon double bonds, whereas a liquid mixture including a polyvinyl alcohol polymer having a viscosity-average degree of polymerization of 200-1500, water, and at least one type of polyalcohol is retained within the polymer matrix. Moreover, the content of the polyvinyl alcohol polymer with respect to 100 pts.wt. of the polymer matrix is 35-70 pts.wt.
Abstract:
PROBLEM TO BE SOLVED: To provide a self-restoring adhesive whose adhesive force to an adherend is reduced by heating and which thereby is easily peeled from the adherend without damaging the adherend and which is excellent in repetitive usability.SOLUTION: The self-restoring adhesive 1 is obtained by forming a shape having at least one of projections and recesses 1a on an adhesive polymer material, which has such a shape self-restoring property that the adhesive polymer material restores a shape before compressive deformation when it is heated after compressively deformed under heating and then cooled so that the adhesive force may be reduced when the self-restoring adhesive 1 restores a shape before compressive deformation by heating after it is compressively deformed and then cooled.
Abstract:
PROBLEM TO BE SOLVED: To provide a self-absorption polymer sheet having no adhesiveness and excellent in self-absorption property and detachability to an adherend.SOLUTION: A self-absorption polymer sheet contains a polymer of monomer mixture that contains at least (A) polyfunctional urethane(meth)polyacrylate having two or more (meth)acryloyl groups in a molecule and rigidity of 10 to 70 when cured alone and (B) polyfunctional urethane(meth)polyacrylate having two or more (meth)acryloyl groups in a molecule and rigidity of 80 to 100 when cured alone, and a 90° peel force of the self-absorption polymer sheet to a borosilicate glass is 0.3 N/20 mm or less and a vertical peel force of the self-absorption polymer sheet to the borosilicate glass is 8 to 30 N.
Abstract translation:要解决的问题:提供一种自吸收聚合物片材,其具有粘合性,并且具有优异的自吸收性和对被粘物的剥离性。溶解性:自吸收聚合物片材含有至少包含(A)的单体混合物的聚合物, 分子中具有2个以上(甲基)丙烯酰基的多官能氨基甲酸酯(甲基)丙烯酸酯,单独固化时的刚性为10〜70,(B)分子中具有2个以上(甲基)丙烯酰基的多官能氨基甲酸酯(甲基) 单独固化时的刚性为80〜100,自吸收聚合物片对硼硅酸盐玻璃的剥离力为90°,为0.3N / 20mm以下,自吸收性聚合物片与硼硅酸盐玻璃的垂直剥离力 是8到30 N.
Abstract:
PROBLEM TO BE SOLVED: To provide a polymer gel and a polymer gel sheet, which have sufficient tackiness (pastability) to an adherend such as glass or metal plates, can easily be peeled off the adherend and reutilized, and have sufficient pastability and reworkability.SOLUTION: A polymer gel contains a polymer of an urethane (meth)acrylate having two or more methacryloyl groups in one molecule, and a polyol compound, and has dynamic viscoelasticity in which the value of a dynamic loss elastic modulus G" at 25°C measured in a temperature dispersion at a frequency of 1 Hz is in the range of 1.0×10to 1.0×10Pa, and the loss tangent tanδ is