Abstract:
The present invention relates to a polymer including repeating units of the following general formula (1): wherein R1, R2, m, k and the asterisks are as defined in the specification and the claims, and wherein the bromine content in the polymer being 45 to 80 wt %, as well as to a method for producing such polymers.
Abstract:
Use of biologically-derived polyphenols for the preparation of epoxy resins is described. Examples of biologically-derived polyphenols include resveratrol, genistein, daidzein, and polyphenols synthesized from tyrosine. Because the epoxy resins are prepared from biologically-derived materials, they provide epoxy resins that will degrade into biologically harmless materials. The epoxy resins can be used to provide coating compositions.
Abstract:
Disclosed is a block copolymer of the formula: A-B-A (I) or A-B (II), wherein block A is: (i) a polymer of allyl glycidyl ether or (ii) a polymer of allyl glycidyl ether wherein one more of the allyl groups have been replaced with 1,2-dihydroxypropyl group or a group of the formula: —(CH2)a—S—(CH2)b—X, wherein a, b, and X are defined herein. The block copolymers find use as wetting agents in the preparation of porous membranes from aromatic hydrophobic polymers such as polyethersulfone. Also disclosed are methods of preparing such block copolymers and porous membranes therefrom.
Abstract:
A composition in accordance with the present invention contains a nano-carbon material, such as a carbon nanotube, and a polyether-based polymer containing oxirane monomer units at least part of which are oxirane monomer units each having a cationic group.
Abstract:
A polyether compound containing oxirane monomer units in an average number per molecule of 5 to 200, wherein the polyether compound has a cationic group and cross-linkable group in the oxirane monomer units, and a cross-linkable composition containing this polyether compound and a cross-linking agent which enables cross-linking of the cross-linkable groups of the polyether compound are provided.
Abstract:
A material for solid polymer electrolyte, made of a polyether polymer having a moisture content in the range of 400 to 5,000 ppm by weight. A formed solid polymer electrolyte, which is made by mixing the material for solid polymer electrolyte together with an electrolyte salt compound soluble in the polyether polymer, has good ionic conductivity and high mechanical strength. A polyether polymer having a moisture content not larger than 0.04% by weight and a toluene-insoluble content not larger than 5% by weight. This polyether polymer gives a formed solid polymer electrolyte having a smooth surface.
Abstract:
Single ion conductors comprising polymer electrolytes prepared by grafting a salt compound onto a comb-branch polymer or dendrimer are disclosed having superior properties.
Abstract:
A water-absorbing polymer having a desirably controlled moisture content with a reduced variability from lot to lot and suitable for a shaped article having good characteristics is obtained by bringing a finely divided particle of water-absorbing polymer into contact with a stream of air having a moisture content of 2-20 g/m3 so that the moisture content in the polymer particle is increased by 300 ppm by weight or more to a moisture content of 300-50,000 ppm by weight. This moisture content-controlling treatment is carried out using a closed vessel wherein the air is fed, or using a pneumatic transportation apparatus wherein the air is fed, and the transportation and moisture content-control of polymer particle are conducted simultaneously.
Abstract translation:通过将细分散的吸水性聚合物颗粒与具有一定吸湿性的聚合物的空气流接触,获得具有理想控制的水分含量,具有从批次到批次变化的适合于具有良好特性的成型制品的吸水性聚合物, 水分含量为2-20g / m 3,使得聚合物颗粒中的水分含量相对于水分含量为300-50,000重量ppm增加了300重量ppm以上。 这种水分含量控制处理是使用空气供给的密闭容器,或使用空气进料的气动输送装置进行的,聚合物粒子的输送和水分含量控制同时进行。
Abstract:
An object of the present invention is to provide a process which can produce, easily and with good productivity and reproducibility, an ethylene oxide copolymer provided with desired compositional ratios of monomers and a desired molecular weight and further with a desired melting point. As a means of achieving this object, a process according to the present invention for production of an ethylene oxide copolymer is a process comprising a step of polymerizing a monomer mixture including ethylene oxide as a main component, thereby producing the ethylene oxide copolymer, with the process being characterized in that the polymerization step includes at least one step each of the following steps: a step in which only the ethylene oxide is supplied to thus polymerize it; and a step in which the ethylene oxide and another monomer are supplied to thus polymerize them.