摘要:
The invention relates to copper-based catalysts, processes for their production and their use and to a process for the production of alkyl halosilanes in the presence of said catalysts.
摘要:
Glass fibers of superior physical properties are produced by drawing at a temperature between about 1250.degree. and 1350.degree. C a melt consisting essentially ZnO-MgO-Al.sub.2 O.sub.3 -SiO.sub.2 -TiO.sub.2 of the following approximate composition by weight:______________________________________ ZnO 15 to 23 % SiO.sub.2 43 to 52 % Al.sub.2 O.sub.3 15 to 23 % MgO 7 to 12 % TiO.sub.2 3 to 7 %. ______________________________________ The fibers are especially suited for use as a reinforcement in a plastic, plaster, cement or low-melting metal structure.
摘要翻译:具有优异物理性能的玻璃纤维通过在约1250℃至1350℃之间的温度下拉伸制备基本上由以下组成重量计的ZnO-MgO-Al 2 O 3 -SiO 2 -TiO 2的熔体:} ZnO 15至23%} SiO 2 43〜52%} Al 2 O 3 15〜23%} MgO 7〜12%} TiO 2 3〜7%。 }纤维特别适用于塑料,石膏,水泥或低熔点金属结构中的增强材料。
摘要:
An aqueous dispersion of an epoxide compound comprising water, one or more water-insoluble 1,2-epoxide compounds having mol weights Mn of from between 150 and 3000 and an emulsifying system comprising:(A) from 9.5 to 35% by weight of at least one polyester resin containing carboxyl groups having an acid number of from 10 to 50 mg KOH/g substance and a molecular weight Mn of from 400 to 4000, at least 30% of the carboxyl groups being neutralized;(B) from 0.5 to 25% by weight of at least one emulsifier having an HLB-value.gtoreq.15 and represented by the formula: ##STR1## wherein R.sup.1 represents a C.sub.1 -C.sub.16 -alkyl group,R.sup.2 represents H or a C.sub.1 -C.sub.16 -alkyl group,R.sup.3 represents H or methyl,n represents a number from 10 to 50;(C) from 40 to 90% by weight of at least one emulsifier having an HLB-value of 15 and the general formula: ##STR2## wherein R.sup.2 is previously defined, R.sup.4 represents C.sub.1 -C.sub.4 -alkyl group, x is a number of from 2 to 3, and m is a number from 15 to 100, the total of the percentage contents from A, B, and C being 100%.
摘要:
Glass fibers of superior physical properties are produced by drawing at a temperature between about 1200.degree. and 1300.degree. C a melt consisting essentially of MgO-CaO-ZnO-Al.sub.2 O.sub.3 -SiO.sub.2 -TiO.sub.2 of the following approximate molar composition:______________________________________ MgO 7-27.5 % CaO 4.5-32.5 % ZnO 3-15 % Al.sub.2 O.sub.3 5-13.5 % SiO.sub.2 36-56 % TiO.sub.2 0- 9 % ______________________________________ The fibers are especially suited for use as a reinforcement in a plastic, plaster, cement or low-melting metal structure.