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Root > Materials Chemistry > Patents > Rheological Additives

Subcategories:

Plasticizer (10)

Polyacryl amide (3)

Related categories elsewhere:

Materials Science: Rheological additives (6)

Patents: Water retaining additives (10)

Suppliers of Raw Materials: Rheological additives for mortars (1)

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Hydrophob modified HEC as additive for
An additive for portland cement-based masonry mortar mixes is described which is based on hydrophob modified hydroxyethyl cellulose. Its essential property is a low level of adsorption onto portland cement. Key properties include good water retention even at elevated temperatures, air entrainment, good low-air workability, and flexural bond strength enhancement (meets the requirements of ASTM C 1329 for mortar cements). Its use level is around 0.007%; tradenames are Nexton M20W, M23W and M25W.
Hrsg.: Hercules Inc., 2000. US6068696 (Equivalents: EP1098861, DE69903173)

Thickening system for building material mixtures (German)
The thickener for tile adhesives and gypsum-based smoothing mortars contains cellulose ether, starch ether, and phyllosilicates.
Hrsg.: Clariant GmbH, 1997, EP0773198 (Equivalent: DE19541945)

Thickener compositions containing vinyl alcohol copolymers and cellulose ethers
The thickener composition may be prepared by blending polyvinyl alcohol and cellulose ether, but it was found to be preferable to add the cellulose ether within the production process of the polyvinylalcohol (prior to hydrolysis). The thickener gave excellent workability properties and mechanical properties (tested in tile adhesive and gypsum plaster).
Hrsg.: Wacker Chemie AG, 2002, US2002045684 (Equivalent: DE10040172)

Cellulose ether thickening compositions
The combination of a cellulose ether thickening agent (CMC) with a swelling silicate thickening agent such as smectite clay gives excellent thickening performance in electrolyte containing compositions (synergistically interaction between CMC and Hectorite).
Hrsg.: Rangus et al (Laporte Industries Ltd.), 1993, WO9308230

Swellable phylloscilicate for use in media that contain bivalent or polyvalent cations (German)
The invention relates to a swellable phylloscilicate on the basis of smectite or sepiolith/palygorskite for use in media that reduce swellability and that contain bivalent or polyvalent cations.
Hrsg.: Süd Chemie AG, DE10042455, 2002

Etherified vinyl alcohol polymers as thickeners (German)
Etherified vinyl alcohol polymers based on partially or completely hydrolyzed vinyl acetate homopolymers or copolymers for use as thickeners in liquid-containing compositions, particularly hydraulically and non-hydraulically setting construction formulations such as plasters, mortars, tile adhesives, and renders.
Hrsg.: Wacker Chemie AG, DE10120492, EP1253157, US20020198292, Nov. 2002

Rheological additive for mortars (cellulose ether substitute)
A rheological additive especially for tile cements and thermal insulation adhesives. It contains a soluble copolymer of (meth)acrylic acid and (meth)acrylic esters, a dispersant (i.e. calcium lignosulfonate or other superplastizicers), and a dispersion powder.
Hrsg.: Wacker Chemie AG, US20020195025, EP1258464, DE10122629, Dez. 2002

Cellulose ether based thickener for electrolyte containing compositions
The combination of an anionic cellulose ether (CMC) with a swelling silicate thickening agent such as smectite clay or a synthetic clay having a structure resembling hectorite shows a synergistic thickening effect.
Hrsg.: Laporte Industries Ltd., 1993. WO9308230

Aqueous well servicing fluids
The fluid loss of aqueous well servicing fluids can be decreased by adding a cross-linked hydroxyethyl starch and a hydroxyethyl cellulose (products named: Natrosol 250 HHR; Bohramyl CR) to the aqueous fluid, which preferably contains at least one water soluble salt of a multi-valent metal ion, e.g. CaCl2, CaBr2, ZnBr2, or a mixture thereof.
Hrsg.: NL Industries Inc., GB2110698, 1983

Additive for cementitious compositions
An additive for cementitious compositions is provided comprised of a cellulose ether, a starch ether and a polyacrylamide. This additive, when added to cementitious compositions, improves the workability of the resulting cementitious composition when used as a tile grout or mortar.
Hrsg.: Henkel KGaA, 1987, US4654085

Phyllosilicates as rheological additive for mineral binder systems (German)
Finely-divided, smectic silicates are used as thickener in mineral mortars: bentonite, montmorillonite, hectorite, saponite, beidelite and/or sauconite. Contains many details on layered silicates regarding mortar compositions.
Hrsg.: Süd Chemie AG, 1995. EP0675089 (Equivalent: DE4410728)

Thickening compositions containing xanthan gum, guar gum and starch
Synergistic thickening effects between xanthan gum, guar gum (or a derivate) and starch ether (especially carboxymethyl starch, "Solvitose C5").
Hrsg.: Merck & Co Inc., 1978. US4105461 (Equivalent: DE2738355)

Multi-functional additive for use in well cementing
Cement, sodium silicate, carrageenan suspending agent, sodium polyacrylate, AMPS terpolymer, dispersant (sulfonated naphthalene formaldehyde condensate or a sulfonated ketone acetone formaldehyde condensate) and a cellulosic polymer (HEC or CMHEC).
Hrsg.: BJ Services Company (Houston, TX), 2001, US6235809

Aqueous well servicing fluids
The fluid loss of aqueous well servicing fluids can be reduced by a cross-linked hydroxyethyl starch (i.e. "Bohramyl CR") and a polymeric component selected from carboxyalkyl cellulose (in which the alkyl has 1 to 3 carbon atoms), xanthan gum and mixtures thereof. The two types of additive interact synergistically.
Hrsg.: NL Industries Inc., GB2110698, 1983

Hydrophob modified and sulfoalkyated polysaccharide derivative
Nonionic cellulose ethers with a hydrophobic substituent (hydrocarbon chain) and a C1-C5 sulfoalkyl group are used as a thickener in hydraulic compositions (gypsum and cement).
Hrsg.: Kao Corporation, 1998. EP0879826 (Equivalents: US6068697, WO9823647)

Additive combination for improving the processing properties of water-containing mixtures of building materials
Additive combination for improving the processing properties of water-containing mixtures of building materials: Cellulose ether + polyacrylamide + alkali metal salt or ammonium salt of a crosslinked, ungrafted or starch-grafted polyacrylate + starch ether + salt of an arylsulfonic acid-formaldehyde condensation product or of a sulfonic acid-modified product of the polycondensation of melamine and formaldehyde.
Hrsg.: Hoechst AG, 1994, US5387626 (Equivalent: EP0530768)

Additive for agglomerating projectable building materials
Micronized sepiolites and attapulgites (< 40 µm) are used as rheological additives in machine-applied cementitious plastering mortars. Products named: Pangel S9, Attagel 40, Attagel 50, MIN-U-GEL.
Hrsg.: Tolsa, S.A., 2001. EP1095913

Additive combination for improving the workability of water containing building material mixtures (German)
An additive combination containing a) a water-soluble cellulose ether or a derivative, b) polyacrylamide, c) superabsorbent polymer (alkali metal salt or ammonium salt of a crosslinked polyacrylate which may have been grafted with starch), d) starch ether and e) a water-soluble alkali metal salt, alkaline earth metal salt or ammonium salt of arylsulphonic acid/ formaldehyde condensation products or of a sulphonic-acid-modified polycondensation product of melamine and formaldehyde. This additive combination reduces the stickiness of mortars which is caused by cellulose ethers.
Hrsg.: Hoechst AG, 1993. EP0530768 (Equivalent: US5387626)

Use of hydrophobicised nonionic cellulose ethers in emulsion paints, and the resulting emulsion paints (German)
Nonionic cellulose ethers (MC, MHEC, MHPC, HEC, EHEC) which have been surface treated with aqueous polyethylene emulsions or paraffin emulsions impart a markedly increased resistance to scrubbing when used as thickeners in emulsion paints.
Hrsg.: Aqualon GmbH, 1990. DE3910742

Technological additive for agglomerating projectable building materials and ...
... utilization of the additive in projected mortars and concretes. An additive that comprises at least a rheological grade clay, preferably sepiolite, a water reducing agent and an aerating agent.
Hrsg.: TOLSA SA (ES), 2001, EP1095913

Thickening systems for water-based building material mixes
A compound of cellulose ether, polyvinyl alcohol and boric acid (or its salts, preferably borax) is used as a thickener for tile adhesives. Due to the addition of boric acid or borax, these thickening systems have an improved thickening action compared with thickening mixtures composed only of cellulose ether and polyvinyl alcohol.
Hrsg.: Hoechst AG, 1993. US5234968 (Equivalents: DE4016979, EP0458328)

Temporarily cross-linked cellulose ethers with retarded solubility (German)
Description of a process to get cellulose ethers with retarded solubility without the use of glyoxal.
Hrsg.: Clariant GmbH, 2003. DE10222154 (Equivalent: WO03097700)

Additive mixtures for gypsum materials based on cellulose ethers (German)
Additive for gypsum-based mortars, containing cellulose ether, cationic polyacrylamide, hydroxypropyl starch and superplasticzer (i.e. Ca-lignosulfonate).
Hrsg.: Aqualon GmbH, DE3920025-A1, 1991

Building material products containing organic polymers as thickeners
Synergistic interactions between (a) water-soluble natural polymers and their derivatives (cellulose ethers, guar derivatives, xanthan gum, starch ethers), (b) an alkali metal salt or ammonium salt of a crosslinked polyacrylate which, if desired, is grafted with a starch, and (c) a water-soluble alkali metal salt or alkaline earth metal salt of arylsulfonic acid/formaldehyde condensation products or of a sulfo-modified melamine/formaldehyde polycondensation product.
Hrsg.: Hoechst AG, 1995. US5432215 (Equivalent: EP0504870)

Liquid concrete admixture
Storage-stable mixtures of polycarboxylate-based plasticizer and butoxylated polyalkylenepolyamines or their salts as air detrainers.
Hrsg.: BASF AG, 2003. US6545067 (Equivalent: DE19842859)

A blend of a water-soluble cellulose ether and a water-swellable polymer
An additive especially for use in tile adhesives: A cellulose ether (MC, MHPC) and a water-insoluble, but water-swellable polymer are mixed (rati about 1:1). The water-swellable polymer may be a methyl cellulose with low methoxyl-content (17-23% OCH3) or an unneutralized polyacrylic acid (lightly crosslinked, i.e. Carbopol 934). The sag resistance of the additives has been tested in tile adhesive formulations.
Hrsg.: The Dow Chemical Company, EP0327351, 1989 (Equivalent: US4846889)

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