Water-borne formulations, performance

Importance of Elongational Flows in the Performance of Water-Borne Formulations... 

Applications in which dynamic uniaxial elongational viscosities (DUEVs) have been important to the performance of water-borne formulations are discussed. The achievement of high viscosities at low shear rates with minimum mechanical degradation of the water-soluble polymer and with minimum viscoelastic effects in applications that involved converging flows are discussed. These two factors serve as driving forces for the acceptance of hydrophobically modified water-soluble polymers. Complexities arising from the combined contribution of shear and elongational deformations in applications and in their measurement are discussed in the final section. 

Acrylic latex sealants. Basic acrylic latex sealant formulations were compounded in a sigma blade mixer, as shown in Table 3. The water-borne silanes were then incorporated into a base. Standard wet and dry peel adhesion determinations from various substrates were performed periodically in accordance with ASTM C794-8. 

Stabilising agents for use in water borne coatings are discussed with reference to the three classes dispersants, surfactants, and protective colloids. Salts are also examined as an aid to colloidal stability in the formulation, and defoamers as related species are also discussed. Each are described with hints on improving performance. 7 refs. EUROPE-GENERAL Accession no.584582... 

Toxicity, flammability, and materials shortages associated with organic solvents have resulted in the development of several new water-borne adhesive systems. Many of the previously effective adhesive formulations are not readily converted to water-borne analogs. Many of the previously understood solution property-performance correlations remain valid in water-borne systems some do not. In this work an effort has been made to improve our understanding of the adhesive mechanisms and property-performance correlations in solvent and water-borne contact adhesives. These adhesive systems include phenolic/neoprene and phenolic/acrylic compositions. Some of the physical properties of the individual components and of the phenolic/elastomer blends have been related to contact adhesive performance. 

In general, most labels are applied using pressure-sensitive adhesives formulated with water-borne acrylic adhesives, solvent-borne adhesives, or hot-melt adhesives. The adhesives used for these labels can also be formulated for variable adhesion performance, such as instant permanence, repositionability, peelability (removability), low temperature adhesion, high tack for rough surfaces, UV resistance, or plasticizer migration resistance. The adhesive s performance is linked to the base carrier material upon which it is applied. 

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