摘要:
A maleic anhydride copolymer comprising maleic anhydride units (I), conjugated diene units (II) and aliphatic monoolefin units (III) is provided. This copolymer has a weight-average molecular weight of from 500 to 50000. The molar ratio of unit (I)/(unit (II)+unit (III)) ranges from 30/70 to 90/10 and the molar ratio of unit (II)/unit (III) ranges from 5/95 to 90/10. A hydrolyzed product of the copolymer or a water-soluble maleic acid copolymer is also provided. The hydrolyzed product is advantageously used for scale inhibitors, dispersants for calcium carbonate or admixtures for cement and conctrete.
摘要:
A process for the hydrogenation of conjugated diene polymers having alcoholic hydroxyl groups, is provided. In the process, reduced nickel is used as a catalyst and an ether or a mixture of an ether and a hydrocarbon is used as a solvent for the hydrogenation reaction whereby elimination of the group rarely occurs with a very high hydrogenation rate being attained.
摘要:
A block copolymer having a numerical average molecular weight of 30,000 to 300,000 composed of two or more blocks consisting of aromatic vinyl units having a numerical average molecular weight of 2500 to 40,000, and one or more blocks containing a vinyl bonding content of not less than 40%, having a peak temperature of primary dispersion of tan .delta. at least 0.degree. C., and consisting of isoprene or isoprene-butadiene units in which at least a part of carbon-carbon double bonds may be hydrogenated, and a composition consisting of the block copolymer. The composition can provide a vibration-damping material.
摘要:
A copolyester film comprising: (a) a copolyester which comprises, as a dicarboxylic acid component, 80 to 97 mole percent of terephthalic acid and 3 to 20 mole percent of isophthalic acid and, as a diol component, 60 to 85 mole percent of 1,4-butanediol and 15 to 40 mole percent of diethylene glycol, and said copolyester having a reduced viscosity in the range of 0.8 to 1.4 dl/g and a melting point in the range of 160.degree. to 200.degree. C.; and said film having (b) a heat of crystal fusion in the range of 5 to 10 cal/g, (c) a haze value in the range of 5 to 35 percent, and (d) an initial Young's modulus in the range of 3.times.10.sup.3 kg/cm.sup.2 to 30.times.10.sup.3 kg/cm.sup.2. A hot melt adhesive comprising said film is also provided. This hot melt adhesive has excellent high speed bonding characteristics, durability and high bond strength with respect to substrates.
摘要翻译:一种共聚酯膜,其包含:(a)共聚酯,其包含作为二羧酸成分的80至97摩尔%的对苯二甲酸和3至20摩尔%的间苯二甲酸,并且作为二醇组分包含60至85摩尔%的1 ,4-丁二醇和15〜40摩尔%的二甘醇,所述共聚酯的粘度在0.8〜1.4dl / g的范围内,熔点在160〜200℃的范围内。 并且所述膜具有(b)5〜10卡/克范围内的结晶熔融热,(c)雾度值在5〜35%的范围内,(d)初始杨氏模量在 3×10 3 kg / cm 2至30×10 3 kg / cm 2。 还提供了包含所述膜的热熔粘合剂。 该热熔粘合剂具有优异的高速粘合特性,耐久性和相对于基材的高粘结强度。
摘要:
Microporous crumbs of a hydrogenated block copolymer, produced by the process comprising feeding a solution of a hydrogenated block copolymer in a hydrocarbon solvent at a concentration of said hydrogenated block copolymer within a range from 5% to 60% by weight into hot water while maintaining the temperature of said solution at 40.degree. C.-150.degree. C., and then steam stripping at a temperature higher than the boiling point of the hydrocarbon solvent or higher than the azeotropic point of the hydrocarbon solvent and water when they form an azeotropic mixture and lower than 150.degree. C., wherein said hydrogenated block copolymer is obtained by hydrogenating more than 50% of unsaturated bonds derived from conjugated diene of a block copolymer having at least one polymer block consisting essentially of a vinyl aromatic compound and at least one polymer block consisting essentially of a conjugated diene in which the weight ratio of the vinyl aromatic compound to the conjugated diene is within a range from 5/95 to 95/5, and wherein said crumbs have (1) a bulk density of more than 0.18 g/cc, (2) a total volume of micropores of is more than 0.4 cc/g and (3) a ratio of the sum of the volume of micropores having a pore diameter within a range from 0.14 to 3.9 .mu.m based on the total volume of the micropores of more than 8% are provided. The microporous crumbs can absorb a softening agent, a plasticizer and the like uniformly and rapidly, have an excellent handling property and provide molding compounds free of non-melted matters.
摘要:
In the preparation of a polyurethane from a polymeric polyol and an organic polyisocyanate, by using as the polyol a polymeric polyol containing in the molecule thereof 2-methyl-1,8-octanediol residue, a novel polyurethane having excellent resistance to hydrolysis, low temperature characteristics and abrasion resistance can be obtained.
摘要:
A polycarbonate resin composition which comprises(i) bisphenol type aromatic polycarbonate, in admixture with(ii) 5 to 200 parts by weight of a polyester type copolymer, per 100 parts by weight of said bisphenol type aromatic polycarbonate, which is produced by adding(a) 5 to 100 parts by weight of bisphenol type aromatic polycarbonate having a viscosity-average molecular weight of not less than 5,000,to (b) 100 parts by weight of a polyester precursor having a number-average polymerization degree of 1 to 30 which is obtained from bifunctional carboxylic acid mainly composed of terephthalic acid or a derivative thereof having an ester forming ability and a diol component, and effecting polycondensation, which provides an improved fluidity and solvent cracking resistance without remarkably decreasing of the original impact resistance and transparency of polycarbonate, to eliminate the defects of polycarbonate.
摘要:
A process for producing a cationic polymer, which comprises polymerizing a vinyl monomer represented by the general formula, ##STR1## wherein R.sub.1 represents --H or --CH.sub.3, R.sub.2 represents --CH.sub.2 CH.sub.2 -- or ##STR2## R.sub.3 and R.sub.4 represent --CH.sub.3 or --CH.sub.2 CH.sub.3, R.sub.5 represents --C.sub.n H.sub.2n+1, in which n is an integer of 0 to 4, ##STR3## or --CH.sub.2 COOH, and X.sup.- represents Cl.sup.-, CH.sub.3 SO.sub.4.sup.-, CH.sub.3 SO.sub.3.sup.-, or 1/2 SO.sub.4.sup.--, either alone or in admixture with up to 25% by weight, based on the total weight of the monomers, of other copolymerizable vinyl monomers in the presence of 7 to 18% by weight, based on the weight of the polymerization system, of water and, if necessary, choline chloride by use of a polymerization initiator and elevating the temperature, in the final polymerization stage, to 110.degree. to 150.degree. C. to complete the polymerization, thereby obtaining the water-soluble cationic polymer in the form of a lump. The polymer in the lump form thus obtained may be easily ground with a high efficiency at room temperature. The powdered polymer is excellent as a cationic flocculant.
摘要翻译:一种阳离子聚合物的制造方法,其包括聚合由通式表示的乙烯基单体,其中R 1表示-H或-CH 3,R 2表示-CH 2 CH 2 - 或R 3,R 4表示-CH 3 或-CH 2 CH 3,R 5表示-C n H 2n + 1,其中n为0至4的整数,或者是-CH 2 COOH,X表示Cl - ,CH 3 SO 4 - ,CH 3 SO 3 - 或1/2 SO 4 - 在基于聚合体系的重量的7至18重量%的存在下,单独或以至多25重量%的混合物,基于单体的总重量,其它可共聚的乙烯基单体的混合物,以及 如果需要,使用聚合引发剂进行氯化胆碱化,并在最终聚合阶段将温度升高至110℃至150℃以完成聚合,从而获得块状形式的水溶性阳离子聚合物 。 如此获得的块状聚合物可以容易地在室温下高效地研磨。 粉末聚合物作为阳离子絮凝剂是优异的。