摘要:
This invention relates to urethanes which contain at least one sulphonic acid group and at least two free OH-groups and to a process for the preparation thereof.
摘要:
The instant invention relates to dihydroxy carbamates containing sulphonic acid groups, and to a process for their production. They are obtained by the addition of bisulphites to unsaturated carbamates.
摘要:
The invention relates to semipermeable membranes with a water absorption capacity of from 4.5 to 11% by weight, preferably from 4.5 to 8% by weight, as measured on approximately 40.mu. thick symmetrical films at room temperature and at 65% relative air humidity, a throughflow of 130 to 200 l/m.sup.2 d for a desalination level of 94.6 to 99.5% and consisting of an aromatic heterocycle-containing copolyamide with a relative viscosity of .gtoreq.1.4, as measured on a 0.5% N-methyl pyrrolidone solution at a temperature of 20.degree. C.
摘要:
A disulphimide group-containing acrylonitrile copolymer semi-permeable membrane which comprises:(A) from 99 to 50% by weight of acrylonitrile units;(B) from 1 to 50% by weight of units of an acrylonitrile-copolymerizable ethylenically unsaturated monomer containing one or two disulphimide groups; and(C) from 0 to 30% by weight of units of one or more other acrylonitrile-copolymerizable olefinically unsaturated monomer, the sum of the percentages amounts to 100.The semi-permeable membranes may be used in reverse osmosis and ultrafiltration.
摘要:
The invention relates to semipermeable membranes with a water absorption capacity of from 4.5 to 10% by weight preferably from 4.5 to 8% by weight as measured on approximately 40.mu. thick symmetrical films at room temperature and 65% relative air humidity, with a throughflow of at least 80 1/m.sup.2 d for a desalination level of at least 85% and consisting of a fully aromatic copolyamide with a relative viscosity of .gtoreq.1,4, as measured on a 0.5% N-methyl pyrrolidone solution at a temperature of 20.degree. C.
摘要翻译:本发明涉及在室温和65%相对空气湿度下在约40μm厚的对称膜上测量的吸水能力为4.5至10重量%,优选4.5至8重量%的半透膜,其中通孔为 对于至少85%的脱盐水平,至少80l / m 2d,并且由在0.5%N-甲基吡咯烷酮溶液中在20℃温度下测量的相对粘度> = = 1,4的全芳族共聚酰胺组成 DEG C.
摘要:
Primers, essentially consisting of a film former or matrix former, an additive, an ionic and/or colloidal noble metal, a filler and a solvent, are suitable for coating substrate surfaces for subsequent chemical metallization.
摘要:
The firmly adhesive metallization, in particular partial metallization, of the surface of semiconductors is possible, without pickling, by carrying out the activation with organometallic compounds of metals of the I and VIII Secondary Groups of the Periodic Table of Elements, then reducing in a conventional manner and metallization without current.
摘要:
The invention relates to pharmaceutical compositions containing, as an active ingredient, a water-soluble polyester or polycarbonate based on one or more polyetherglycols of Formula (I) as defined in the specification. Also included in the invention is the use of said compositions for their tumor-inhibiting action.
摘要:
Flexible circuits are obtained in an elegant manner, without the customary etching methods, wet-chemically in accordance with the principles of semiadditive or fully additive technology by using for the activation noble metal activators and, as base material, films or flexible boards whose surface has (a) a specific total pore volume per unit area of 0.015-0.045 dm.sup.3/ m.sup.2, (b) an average pore diameter of 0.05-5.0 .mu.m and (c) an average pore depth of 0.05-4.0 .mu.m.
摘要翻译:柔性电路以优雅的方式获得,没有常规的蚀刻方法,根据半辅助或全添加技术的原理湿法化学,通过使用活化贵金属活化剂和作为基材的膜或柔性板,其表面具有 (a)每单位面积的特定总孔体积为0.015-0.045dm 3 / m 2,(b)平均孔径为0.05-5.0μm,(c)平均孔深为0.05-4.0μm。
摘要:
Polymer membranes metallized by wet chemistry are highly suitable, for example, for the separation of inert, reactive and fermentation gases.The metallization is carried out after activation with noble-metal complex compounds which have at least two functional groups.Preferred metal coatings are those of Cu, Co and Ni.