Associative thickeners

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 65/32 (2006.01) C08G 65/332 (2006.01) C09D 7/12 (2006.01)

Patent

CA 2221748

Associative thickeners of the present invention are water-soluble polymer compositions that have a backbone of poly(acetal- or ketal- polyether) with ends that are capped with hydrophobic groups. They are prepared by copolymerizing an alpha, omega-diol, -dithiol or -diamino polyether with a gem-dihalide compound in the presence of a base to form an alpha, omega-diol, -dithiol or -diamino poly(acetal- or ketal-polyether) which in turn is reacted with hydrophobic reagents to form the final product. These associative thickeners are used in film-forming coating compositions, such as latex paints.

Les agents épaississants à association décrits sont des compositions de polymères hydrosolubles qui ont un squelette de poly(acétal- ou cétal-polyéther) doté d'extrémités saturées par des groupes hydrophobes. Ils sont préparés par la co-polymérisation d'un polyéther alpha, oméga-diol, -dithiol ou -diamino avec un composé gem-dihalogénure en présence d'une base pour former un poly(acétal- ou cétal-polyéther) alpha, oméga-diol, -dithiol ou -diamino qui réagit à son tour avec des réacteurs hydrophobes pour former le produit final. Ces agents épaississants à association sont utilisés dans les compositions de revêtement filmogènes, telles que les peintures au latex.

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