Aqueous polyurethane dispersions made from hydroxymethyl...

Details Aqueous polyurethane dispersions made from hydroxymethyl... Aqueous polyurethane dispersions made from hydroxymethyl...

C - Chemistry, Metallurgy

08

G

C08G 18/36 (2006.01) C08G 18/08 (2006.01) C08G 18/42 (2006.01)

Patent

CA 2580567

Polymer dispersions are prepared by reaction of a polyisocyanate and a hydroxylmethyl containing polyester polyol derived from a fatty acid to form a prepolymer, dispersing the prepolymer in an aqueous phase and then curing the prepolymer to form solid particle particles. The prepolymers can be prepared having isocyanate, hydroxyl, or a variety of other reactive functional groups. The dispersions are useful in a variety of coating, sealant, adhesive and elastomer applications.

L'invention concerne des dispersions de polymère préparées par réaction d'un polyisocyanate et d'un hydroxylméthyle contenant un polyol de polyester dérivé d'un acide gras afin de former un prépolymère; par dispersion du prépolymère dans une phase aqueuse; et par durcissement dudit prépolymère afin de former des particules de particule solide. Lesdits prépolymères peuvent être préparés afin de comprendre un isocyanate, un hydroxyle ou une variété d'autres groupes fonctionnels réactifs. Ces dispersions sont utilisées dans une variété d'applications de revêtement, de scellement, adhésives et élastomères.

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