Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Ethoxylated urethane

HydrophobicaHy Modified, Ethoxylated Urethane. HEUR associative thickeners are in effect poly(oxyethylene) polymers that contain terminal hydrophobe units (66). They can be synthesized via esterification with monoacids, tosylation reactions, or direct reaction with monoisocyanates. There are problems associated with aH of the methods of synthesis. The general commercial procedure for their synthesis is by a step-growth addition of... [Pg.321]

Nonionics (e.g., hydrophobically modified ethoxylated urethanes, HEUR ... [Pg.115]

During these developments, hydrophobically modified ethoxylated urethane (HE UR) thickeners were synthesized and patented (6, 7). Their application in coatings was discussed, but the emphasis was on improved barrier properties (8), not on rheological influences. The HEUR polymers of the... [Pg.152]

Hydrophobically modified, ethoxylated urethanes (HEURs) are the thickeners of choice in exterior coatings and in corrosion-resistant, high-gloss industrial latex finishes. This chapter presents an overview of our research efforts and discusses approaches to the synthesis of HEUR polymers with different molecular architectures, geometrical influences on solution properties, and viable mechanisms by which this class of associative thickener effects desirable coatings rheology and applied film properties. [Pg.496]

The dispersion stability can be increased due to thickeners added, e.g. ethoxylated urethanes, which are able to form associates with the film forming latex [201]. At the same time, the dispersion contains a certain amount of surfactants these is free surfactant present in the latex, and added surfactant to disperse pigments and fillers. Stability is achieved by varying interaction with the two dispersed phases - latex particles associated with the thickener, and pigment particles. [Pg.570]

See other pages where Ethoxylated urethane is mentioned: [Pg.494]    [Pg.320]    [Pg.115]    [Pg.31]    [Pg.494]    [Pg.320]    [Pg.248]    [Pg.184]    [Pg.127]    [Pg.366]    [Pg.161]    [Pg.459]    [Pg.491]    [Pg.495]    [Pg.495]    [Pg.497]    [Pg.499]    [Pg.501]    [Pg.503]    [Pg.505]    [Pg.507]    [Pg.509]    [Pg.511]    [Pg.513]    [Pg.515]    [Pg.517]    [Pg.519]    [Pg.521]    [Pg.523]    [Pg.525]    [Pg.528]    [Pg.543]    [Pg.544]    [Pg.53]    [Pg.39]    [Pg.31]    [Pg.140]    [Pg.32]   
See also in sourсe #XX -- [ Pg.248 ]



SEARCH



Ethoxylated

Ethoxylates

Ethoxylation

© 2024 chempedia.info