摘要:
The invention relates to organopolysiloxane compositions curable by condensation reaction and comprising (A) at least one organosilicon component consisting of units of the formula R a (OH) b (R 1 O) c SiO (4-a-b-c)/2 (I), in which the radicals and indices are as defined in claim 1, with the proviso that in formula (I) the sum of a+b+c is
摘要:
The presently disclosed and claimed inventive concept(s) relates generally to a carboxymethylcellulose (CMC) system for use in ready-mix joint compounds. More specifically, the presently disclosed and claimed inventive concept(s) relates to a non-uniformly substituted {"blocky") CMC system for use as an efficient thickener and rheology modifier for ready-mix joint compounds and the use of a reduced amount of clay for improving the joint compounds.
摘要:
The invention relates to the use of a surface-functionalised silicic acid, wherein the silicic acid bears on its surface organic multidentate ligands, which can form, as an additive for the resin and/or hardener component in a multi-component reaction resin composition, a chelate complex with metal or metal compounds. Resin and hardener compositions can thus be provided which are storage-stable in the presence of traces of metal compounds.
摘要:
Fluid compositions containing a silica-particle suspension with no intrinsic cementitious properties may be pumped into a wellbore. Upon making downhole contact with previously placed well cements from primary-cementing or previous remedial-cementing operations, the silica suspension reacts to form a gel that seals voids, cracks or fissures in the cement sheath. Portland cement is the preferred cement with which the silica-particle suspensions interact downhole.
摘要:
A water redispersible polymer powder is produced by drying an aqueous mixture of a water insoluble film-forming polymer and a colloidal stabilizer which includes a chelating agent and at least one water soluble polymer. The amount of chelating agent is at least 0.1% by weight, based upon the weight of the water insoluble film-forming polymer, and the amount of the at least one water soluble polymer is at least 0.1% by weight, based upon the weight of the water insoluble film-forming polymer. Dispersions or polymer compositions containing a chelating agent and water soluble polymer as a colloidal stabilizer exhibit an unexpectedly low viscosity which facilitates spray drying and permits use of high solids content dispersions with low pressure spray drying to increase production efficiency. The colloidal stabilizer composition provides unexpectedly superior redispersibility for water insoluble film-forming polymers having very low carboxylation levels.
摘要:
A solid filler composition suitable for applying directly to a substrate comprising i) binder polymer ii) fatty acid salt of linear chain length of from 12 to 26 carbon atoms iii) pigment said composition capable of being formed into a self-supporting, dimensionally stable filler body.