摘要:
The present invention provides acid group-containing, thermostable, hydrophilic condensation products of aldehydes and ketones, wherein the ketones used are symmetrical or asymmetrical ketones with acyclic aliphatic, araliphatic and/or aromatic radicals, at least one radical being non-aromatic.The present invention also provides processes for the production of these condensation products, which can be used as thickening agents, retention agents, surface-active agents, dispersion agents and/or liquefying agents, especially in aqueous systems.
摘要:
A copolymer based on olefinic sulphonic acids as monomer component a) and an organosilicone-containing compound as reactive component b) is proposed, for which in particular 2-acrylamido-2-methylpropanesulphonic acid (AMPS®) is suitable as component a) and vinyltrimethoxysilane, vinyltriethoxysilane and trichlorosilane as component b). This copolymer, which may have a molecular weight of from 5,000 to 5,000,000 g/mol, may also comprise further reaction components c) and d) in addition to the two main components for which further reaction components (meth)acrylamides or vinyl ethers are suitable. These copolymers, which are obtainable in particular by precipitation or gel polymerizations, are used in particular in applications in construction chemistry and here especially as water retention agents and fluid loss additives in drilling fluids and for well cementing. The novel copolymers are distinguished by pronounced thermal stability, which is displayed especially under difficult pressure conditions and at high salinities.
摘要:
This polymeric, acrylamide-free water retention agent, intended inter alia for drilling fluids in the high-temperature range and based on vinylic sulfonic acids, may be composed of the two principal components A and B, component A being selected from the group a) consisting of vinylic substituted sulfonic acid of the series 2-acrylamido-2-methylpropanesulfonic acid (AMPS), vinylsulfonic acid, methallylsulfonic acid or styrenesulfonic acid, salts thereof with a valence of at least 1, or mixtures thereof, or b) a divalent salt of homopolymers or copolymers of a vinylic substituted sulfonic acid of the series 2-acrylamido-2-methylpropanesulfonic acid (AMPS), vinylsulfonic acid, methallylsulfonic acid or styrenesultonic acid or mixtures thereof. In the case where component A comprises group a), the polymer further comprises component B) composed of a) from 4.99 to 60 mol % of an unsaturated, polybasic, cis-positioned carboxylic acid monomer and b) from 0.01 to 10 mol % of a monomer having a polyalkylene oxide side chain which contains from 1 to 120 repeating units of the alkylene oxide. The claimed composition, in particular in the form of a copolymer having a molar weight of between 10 000 and 3 000 000 g/mol, is used preferably in drilling fluids and as an additive to cement slurries with electrolyte contents of between 50 ppm and saturation at temperatures above 200° F. and/or in the presence of formates.
摘要:
Graft polymers of ketone-aldehyde condensation and co-condensation products and/or the monovalent or polyvalent metal compounds thereof are described, in which condensation product consists a) of symmetrical or asymmetrical ketones containing aliphatic, araliphatic, cyclic or aromatic hydro-carbon radicals with at least one nonaromatic radical, b) an aldehyde of the formula R--(CHO).sub.n, wherein n=1 to 2 and R can be hydrogen or an aliphatic, araliphatic, aromatic or heterocyclic radical, and c) optionally of carboxyl, sulpho, sulphamido, sulphoxy, sulphoalkylamine or sulphoalkyloxy groups, to which product anionic and/or nonionic and/or cationic unsaturated monomers have been grafted. These graft polymers are outstandingly suitable as dispersants for inorganic binder suspensions and solutions, for aqueous clay suspensions and solutions or coal/water suspensions, as retention agents, thickeners, in particular for aqueous systems, and as agents for preventing the swelling of clay in aqueous systems.
摘要:
The present invention provides a thermostable polymer comprisinga) 16 to 67 mole % of structural components of the formula: ##STR1## b) 5 to 42 mole % of structural components of the formula: ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3, independently of one another, are hydrogen atoms or methyl radicals, as well as c) 16 to 46 mole % of structural components of the formula: ##STR3## wherein R.sup.4 is a hydrogen atom or a methyl radical. The present invention also provides a process for the production of these polymers which, because of their high temperature stability, are outstandingly useful as retention agents for aqueous systems and as fluid loss additives.
摘要:
A plasticizer based on polycarboxylates is proposed, where the polycarboxylate component is a water-soluble, branched-chain and carboxyl-group-carrying copolymer which has at least one of the structural features selected from nitrogen-functionalized side chain and also, as linkage unit between main chain and side chain, an ester linkage, ether linkage and amide and/or imide linkage. The polycarboxylate component the molar ratio of acid groups to the side-group-carrying monomer is ≧2:1 and/or the side chain length n is
摘要:
The use of a three-component water-soluble polymer comprising 5–90% by weight of a component a), preferably of the maleic acid, fumaric acid or itaconic acid type, 5–90% by weight of a component b) essentially from the group consisting of 2-acrylamido-2-methylpropanesulfonic acid, vinylsulfonic acid and vinylphosphonic acid, and 5–90% by weight of a component c) comprising acrylic acid, methacrylic acid, acrylamide or methacrylamide, as fluidizer for refractory compositions comprising alumina cement is described. The copolymer, which has a preferred molecular weight Mw of
摘要:
In order to reduce the filtrate of aqueous drilling fluid compositions based on clay minerals containing mixed metal hydroxides, a polysaccharide that is partially etherified with hydroxyethyl and/or hydroxypropyl groups is used as the filtrate-reducing agent.
摘要:
The invention relates to condensation products of aldehydes and ketones, which contain acid groups and are especially suitable as dispersants for binding agent mixtures of high salt content.
摘要:
The present invention provides metal compounds of acid group-containing condensation products or co-condensation products of ketones and aldehydes, obtainable by the reaction of acid group-containing ketone-aldehyde condensation products and/or co-condensation products with mono- or polyvalent metal compounds and/or metal complex compounds of metals of Groups IIIA to VIIIA and/or IB to VB of the Periodic System.The present invention also provides processes for the production of these metal compounds, which can be used as thickening agents, surface-active agents, emulsifiers, dispersion agents and/or liquefying agents, especially in aqueous systems.