摘要:
Process for the fatting and hydrophobizing of tanned leather and pelts, wherein the tanned leather or pelt is fatted with an aqueous dispersion containing a natural optionally chemically modified leather fatting agent and a surface-active phosphoric acid partial ester and optionally a non-ionic and/or an anionic carboxy group and/or sulfo group containing surfactant and subsequently treating the fatted leather or pelt in aqueous medium with a polyvalent metal cation; the treated substrates and the dispersions suitable for carrying out the process.
摘要:
Compositions and methods are provided for clarifying and partitioning aqueous lipid-containing specimens or samples such as lipemic serum and plasma. The compositions contain zwitterionic surfactant and water-immiscible organic solvent for lipids. The components of the compositions are selected such that they are compatible in vitro and, when constituted with aqueous specimens, do not interfere with biological or chemical activity of endogenous and exogenous analytes present in the respective specimens. The methods serve to partition the specimens into discrete aqueous and non-aqueous phases. The phases in turn can be individually assayed with respect to any of various analytes, for diagnostic or other purposes.
摘要:
Certain organic compounds derived from urea or thiourea having insectical activity and methods of their preparation are disclosed. The compounds according to the invention have been found to interfere with the mechanism of metamorphoses which occurs in insects. Hence the substances according to the invention are specifically active against insects. Owing to this specificity and because of the absence of phytotoxicity effects, the compounds of this invention are of prime importance.
摘要:
Aqueous compositions for the wetting and rewetting of contact lenses and especially silicone, silicone copolymer (gas-permeable) and soft contact lenses are provided that include a preservative system. The preservative system includes trimethoprim, and benzyl alcohol as an adjuvant bactericide and optionally a salt of EDTA. The use of preservatives which are known to cause eye irritation and lens discoloration such as thimerosal, sorbic acid, potassium chloride and chlorhexidine is eliminated. Wetting and re-wetting compositions which incorporate the preservative system and include thickening and wetting agents are also provided. The wetting and re-wetting solutions can be instilled directly into the eye during contact lens wearing periods and are especially useful for wetting silicone, silicone copolymer and soft daily and extended wear contact lenses.
摘要:
An aqueous slurry of a solid fuel and a process and a means for producing said slurry are described. The aqueous slurry comprises a highly concentrated slurry of a pulverized, carbonaceous material having a particle size of at most 0.5 mm, and 0.02-2% by weight of at least two surface active additives. The solids content of the slurry is 65-90% by weight, preferably 70-80% by weight. The slurry is characterized in that the surface active additives include, as a major part, a water-soluble nonionic surface active agent which is an alkylene oxide adduct with a hydrophobic part and a hydrophilic part, said hydrophilic part consisting of at least one polyalkylene oxide chain with a length of at least 40, preferably 50-150 ethylene oxide units; and, as a minor part, an ionic surface active agent.The ionic surface active agent preferably has the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are hydrogen or an alkyl group with 1-22 carbon atoms, provided that the sum of the number of carbon atoms of R.sub.1 and R.sub.2 is at least 6, and Z.sub.1 designates the group --SO.sub.3 H, --CH.sub.2.sup.+ NHR.sub.3 R.sub.4 X.sup.- or --CH.sub.2.sup.+ NR.sub.3 R.sub.4 R.sub.5 X.sup.-, wherein R.sub.3, R.sub.4 and R.sub.5 are alkyl and/or hydroxyalkyl groups with 1-4 carbon atoms and X is an anion, and n is 40-200.
摘要翻译:描述了一种固体燃料的含水浆料和一种制备该浆料的方法和装置。 含水浆料包含粒度为至多0.5mm的粉碎碳质材料和0.02-2重量%的至少两种表面活性添加剂的高浓度浆料。 浆料的固体含量为65-90重量%,优选为70-80重量%。 该浆料的特征在于,表面活性添加剂主要包括作为疏水部分和亲水部分的烯化氧加成物的水溶性非离子表面活性剂,所述亲水部分由至少一种聚环氧烷 链长至少为40,优选为50-150个环氧乙烷单元; 和作为次要部分的离子表面活性剂。 离子表面活性剂优选具有以下通式:其中R 1和R 2为氢或具有1-22个碳原子的烷基,条件是R 1和R 2的碳原子数之和为 至少6,Z1表示基团-SO 3 H,-CH 2 + NHR 3 R 4 X-或-CH 2 + NR 3 R 4 R 5 X - ,其中R 3,R 4和R 5是具有1-4个碳原子的烷基和/或羟基烷基,X是阴离子,n 是40-200。
摘要:
Bis-semiesters of sulfosuccinic acid with polyether diols based on ethylene oxide/propylene oxide and/or their alkali metal and/or ammonium salts as surfactants, i.e., agents for reducing the surface tension of aqueous substrates such as water or aqueous solutions, as dispersants, wetting agents and leveling agents. Another aspect of the invention relates to the use of such bis-semiesters and/or such salts as emulsifiers in the emulsion polymerization of water insoluble monomers.
摘要:
Sequenced oligomer surfactant has the formula: P--O--C.sub.2 H.sub.3 (CH.sub.2 B)O--.sub.n' --C.sub.2 H.sub.3 (CH.sub.2 A)O--.sub.m --C.sub.2 H.sub.3 (CH.sub.2 B)O--.sub.n Q wherein one of P and Q represents hydrogen and the other represents alkyl having 1-20 carbon atoms; A represents R--CH.sub.2 -- or R'--O-- wherein R is alkyl having 4-16 carbon atoms and R' is alkyl having 4-20 carbon atoms; B is selected from OH, R.sub.1 R.sub.2 N, R.sub.1 R.sub.2 N.fwdarw.O, R.sub.1 R.sub.2 N--O.sup..sym. HV.sup..crclbar., R.sub.1 R.sub.2 N.sup..sym. HV.sup..crclbar., R.sub.1 R.sub.2 R.sub.3 N.sup..sym. Z.sup..crclbar. and R.sub.4 S.fwdarw.(O)a, wherein R.sub.1 and R.sub.2 represent alkyl or hydroxyalkyl, R.sub.3 is methyl or ethyl, R.sub.4 is alkyl, hydroxyalkyl or dihydroxyalkyl, Z.sup..crclbar. is an anion selected from HSO.sub.3.sup..crclbar., CH.sub.3 SO.sub.3.sup..crclbar., CH.sub.3 SO.sub.4.sup..crclbar. and CH.sub.3 --C.sub.6 H.sub.4 --SO.sub.3.sup..crclbar., R.sub.1 R.sub.2 N.sup..sym. HV.sup..crclbar. and R.sub.1 R.sub.2 N--O.sup..sym. HV.sup..crclbar. represent a salt of an amine or amine oxide, a is 0 or 1; m is a number from 2-10; and n and n' are numbers from 2-25, with one of n and n' capable of being 0. The oligomer surfactants are employed in cosmetic and pharmaceutical compositions.
摘要:
This invention relates to a stable electrode cream capable of carrying weak electric current comprising an electrolyte in normal electrolyte amounts, a polyoxyethylene-polyoxybutylene block copolymer wherein the polyoxybutylene portion of the compound has a molecular weight of at least about 1000, and the polyoxyethylene portions contribute from about 60 to 90 percent by weight of the compound, the amount of the block copolymer being about 10 to 30 percent by weight and the balance substantially water.
摘要:
A stable molecular aggregate having an ordered structure comprising a surfactant containing a hydrophilic moiety and hydrophobic moiety and having in the hydrophobic moiety or between the hydrophobic moiety and the hydrophilic moiety a rigid moiety at least 10 .ANG. long is disclosed. The structure, unlike the spherical micelle formed by an ordinary surfactant in water or the loose lamellar micelle formed by a soap in a high concentration, is stable and durable in low concentrations, keeping a high degree of regularity. The structure has primarily a bilayer structure as a basic structural unit.