Alkali Swellable And Alkali Soluble Thickener Technology A Review

These polymers consist of conventional alkali-swellable or -soluble emulsions (ASE) and those that are classified associative by hydrophobe modification (hydrophobically modified alkali-swellable or -soluble emulsions, HASE) This review examines various aspects of AST technology, including stone composition, thickening mechanisms, methods of polymerization, and factors affecting the
A GUIDE TO UNDERSTANDING AND MIXING THICKENERS Rheology modifiers, commonly referred to as thickeners or viscosifiers, are ever-present in most products The use of these additives cut across several process industries including food, pharmaceuticals, cosmetics …
Hydrophobically modified alkali-swellable emulsions (HASE-Thickeners) Like ASE-thickeners, these are dispersions of water-insoluble acrylic polymers in water Again, the acid groups on the polymer chains must be neutralized to make the polymer chains water ‘soluble’ These HASE products differ from ASE-products in that, in addition to acid
Hydrophobically modified alkali-soluble emulsion (HASE) polymers are an important class of rheology modifiers for waterborne coatings applications They are typically prepared as terpolymers by emulsion polymerization of ethyl acrylate (EA), methacrylic acid (MAA), and an associative macromonomer The viscosity development and shear responses of HASE solutions depend on a number of factors
review of HASE polymers is found in Gregory D Shay, Chapter 25, "Alkali-Swellable and Alkali-Soluble Thickener Technology A Review", Polymers in Aqueous Media - Performance Through Association, Advances in Chemistry Series 223, J Edward Glass (ed), ACS, pp 457-494, Division Polymeric Materials, Washington, DC (1989)
Alkali soluble/swellable emulsions (ASE) contain copolymer chains of methacrylic acid and acrylate ester in a ratio at or near 50:50 ASE Quick Summary ASE thickeners contain a balance of methacrylic acid and acrylate ester They are supplied at high volume solids in liquid form Thickening is triggered by a change from low to high pH ASE thickeners are steeply shear-thinning and well suited
review of HASE polymers is found in Gregory D Shay, Chapter 25, "Alkali-Swellable and Alkali-Soluble Thickener Technology A Review", Polymers in Aqueous Media - Performance Through Association, Advances in Chemistry Series 223, J Edward Glass (ed), ACS, pp 457-494, Division Polymeric Materials, Washington, DC (1989) [0004] Conventional HASE polymers generally contain a single associative
Dow is committed to providing technology enhancement to the personal care industry To learn how our expertise in polymers and preservatives can spark your own creativity, please contact us CTFA/INCI Name: Acrylates Copolymer ACULYN™ 33 Rheology Modifier/Stabilizer is an alkali-swellable anionic acrylic polymer emulsion (ASE) that is lightly crosslinked to impart a short pseudoplastic flow
Alkali soluble/swellable emulsions (ASE) contain copolymer chains of methacrylic acid and acrylate ester in a ratio at or near 50:50 Next-generation ASE thickeners are copolymers of methacrylic acid and ethyl acrylate ester (Figure 1) They were developed to mimic the rheology properties of cellulosics, but facilitate an easier-to-use, more cost-effective product Like cellulosic ethers, ASE
23/10/2018 · Hydrphobically modified alkali swellable emulsions (HASE), are rheology additives delivered at low pH, and needs increase in pH to start their thickening effect In addition, it has hydrophobic groups which can associate with each other In this process they form micelles which enables attachments with the hydrophilic part of the formulation This is making it a versatile and important
Developments in acrylic -based thickeners as substitute of emulsion thickeners for pigment printing Acrylic thickener, Emu lsion thickener, Kerosene emulsion, Pigment printing Synthetic thickener 1 Introduction Unlike printing with fibre-affinitive dyes, the pigments are fi xed to the substrate by a binder which adheres to the fibre and forms a continuous film on the fabric enclosing the
Solution and latex properties of model alkali‐soluble rheology modifiers, synthesized via the reversible addition–fragmentation chain transfer process, and the effects of the ethylene oxide
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Aquantitative method for the determination of thickener incorporation rates and thickener equilibration times (TET) in coatings has been developed using a digital Krebs viscometer Upon adding thickener to a coating sample, the viscometer simultaneously provides viscosity readout and continuous mixing at constant speed with degree of agitation simulating the relatively poor mixing conditions
Alibaba offers 333 alkali thickeners products About 38% of these are stone chemicals, 38% are leather auxiliary agents, and 37% are textile auxiliary agents A wide variety of alkali thickeners options are available to you, such as coating auxiliary agents, electronics chemicals, and textile auxiliary agents
Alibaba offers 362 alkali thickener products About 38% of these are leather auxiliary agents, 38% are stone chemicals, and 38% are textile auxiliary agents A wide variety of alkali thickener options are available to you, such as coating auxiliary agents, electronics chemicals, and textile auxiliary agents
thickener itself, The most common thickeners commonly found in paints is known as hydrophobically-modified alkali-swellable emulsion (HASE) [14-17] it is also used as viscosity modefire in stone coating to improve the appearance and printability of stone [18-19] HASE thickeners are based on a polyelectrolyte backbone, usually
Dow is committed to providing technology enhancement to the personal care industry To learn how our expertise in polymers and preservatives can spark your own creativity, please contact us CTFA/INCI Name: Acrylates Copolymer ACULYN™ 33 Rheology Modifier/Stabilizer is an alkali-swellable …
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Free Online Library: Tailoring HASE rheology through polymer design: effects of hydrophobe size, acid content, and molecular weight(hydrophobically modified alkali-soluble emulsion) by "JCT Research"; Business Chemicals, plastics and stone Hydrophobic effect Polymer rheology Analysis Polymers Rheology Usage
Global Hydrophobically Modified Alkali Swellable Emulsion Market Key Players 2019: BASF, Arkema, AkzoNobel, 3V Sigma Hydrophobically Modified Alkali Swellable Emulsion Market …
Soluble base COO* COO* COO* COO* COO* Figure 2 pH-triggered thickeners are insoluble at low pH and soluble at high pH ASE and HASE rheology modifiers are pH-triggered thickeners Figure 1 Alkali soluble/swellable emulsions (ASE) contain copolymer chains of methacrylic acid and acrylate ester in a ratio at or near 50:50
group is typically referred to as the alkali swellable (or soluble) emulsions (ASE) Modification of the structure of ASE polymers by addition of hydrophobic moieties defines the second class of synthetic rheology modifiers known as the hydrophobically modified, alkali swellable emulsions (HASE) This group of polymers, more commonly referred to as associative thickeners, provides the
ACUSOL 830 is an Alkali Soluble acrylic polymer Emulsion (ASE) ACUSOL 830 can be directly incorporated into formulations without preparation of a separate thickener solution Viscosity is developed simply by adjusting the pH on the alkaline side with any base It is supplied as low viscosity emulsion and therefore is easy to handle
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09/03/1993 · A method of coating a substrate with an aqueous coating composition that includes an alkali-swellable associative thickener is disclosed The associative thickener is produced from a monoethylenically unsaturated carboxylic acid, a monoethylenically unsaturated monomer lacking surfactant capacity, a non-ionic urethane monomer, and, optionally, a polyethylenically unsaturated …
alkali-swellable emulsion (HASE) [14-17] it is also used as viscosity modefire in stone coating to improve the appearance and printability of stone [18-19] HASE thickeners are based on a polyelectrolyte backbone, usually
The model thickeners were also tested in a vinyl acrylic architectural paint formulation The effects of each individual factor on paint thickener efficiency, high-shear, and low-shear properties are discussed and compared with solution rheology for predictive relationships
A cost-effective thickener for formulations containing polar solvents This bulletin focuses on our ACULYN™ 33 Rheology Modifier Stabilizer, a cost-effective thickener and particulate suspending agent, particularly suited for formulations containing
Water soluble solvents generally decrease the viscosity, mainly in the low shear range The continuous phase is changed, favouring the desorption of thickener molecules from emulsion particle surfaces and hindering thickener-thickener association
Rheological techniques are used to probe the behavior of hydrophobic alkali-swellable emulsion (HASE) polymers, bearing n-alkyl hydrophobes, in aqueous alkaline media The polymers possess a comb-like architecture with a polyelectrolyte backbone (ethyl acrylate-co-methacrylic acid) and hydrophobes (∼16 per polymer chain) tethered to the
Alkali agents injure the GI tract by saponification of fats and solubilization of proteins that allow deep penetration into tissue Thus, unlike acids, they produce extensive penetrating damage This pathogenesis of injury is rapidly progressive and may extend weeks after onset
The polymer types range from the two extremes of dispersions of highly insoluble polymers in water to highly water-soluble polymers and cover a whole range of intermediate types, such as hydrophobically modified water-soluble polymers, swollen microgels, alkali soluble emulsions, alkali swellable emulsions, and water-reducible polymers The key properties of each type are discussed with
22/09/2010 · 1 A composition of matter useful as a rheological additive for aqueous compositions comprising the reaction product of (a) 15 to 80 percent by weight of one or more C 3-C 8 α,β-ethylenically unsaturated carboxylic acid monomers; (b) at least 15 percent by weight of one or more copolymerizable non-ionic vinyl C 2-C 12 α,β-ethylenically
07/09/2000 · One of the most important developments in the area of additives for waterborne coatings is the use of associative thickeners, and their use has so far been restricted to waterborne coatings only The associative thickeners may be identified chemically as styrene-maleic anhydride terpolymers (SMAT), hydrophobically modified alkali-swellable emulsions (HASE) and hydrophobically modified
Method of coating substrates utilizing an alkali-functional associative thickner containing coating composition Abstract A method of coating a substrate with an aqueous coating composition that includes an alkali-swellable associative thickener is disclosed

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