Storage stable one-pot aqueous silylated polymer curable...

C - Chemistry – Metallurgy – 08 – L

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C08L 83/04 (2006.01) C08F 4/76 (2006.01) C08K 5/56 (2006.01) C08K 5/57 (2006.01) C08L 31/04 (2006.01) C08L 33/04 (2006.01) C08L 101/10 (2006.01) C09D 143/04 (2006.01) C09D 201/10 (2006.01)

Patent

CA 2217725

Curable composition comprising a stable, water dispersible, curable polymer containing a sterically hindered alkoxylated silane group at 0.1 to 75 weight percent of the total composition; a water dispersible or water soluble, hydrolytically stable organometallic catalyst, at 0.1 to 10 weight percent of the total composition; and water at 99.8 to 24.9 weight percent of the total composition are taught herein. These compositions are useful as adhesives, sealants and paints. The compositions have improved properties including solvent resistance, adhesion, hardness, abrasion resistance and mar resistance. Particular catalysts for use herein include dihydroxy bis [2-hydroxypropanato (2-)-O1,O2] titanate mixed titanium ortho ester complexes, acetylacetonate chelate, bis(ethyl-3-oxobutanolato-O1,O3) bis(2-propanolato) titanium, alkanolamine complex of titanium and mercaptoalcohol, mercaptide or sulfide forms of diorganotins having either a Sn-S or Sn=S bond.

La présente invention concerne une composition durcissable constituée d'un polymère stable hydrodispersable et durcissable contenant à raison de 0,1 % à 75 % de la masse totale un groupe silane alcoxylaté à encombrement stérique, d'un catalyseur organométallique hydrodispersable ou hydrosoluble et stable à l'hydrolyse à raison de 0,1 % à 75 % de la masse de la composition totale, et d'eau à raison de 99.8 % à 24,9 % de la masse de la composition totale. Ces compositions, qui conviennent comme adhésifs, agents d'étanchéité et peintures, présentent des caractéristiques améliorées concernant la résistance au solvant, l'adhésion, la dureté, la résistance à l'abrasion et la tenue du brillant. Les catalyseurs particuliers utilisés dans le cadre de l'invention comprennent le dihydroxy bis [2-hydroxypropanato (2-)-O<1>,O<2>] titane, des complexes mixtes titane/ortho-esters, un chélate d'acétylacétonate, le bis(éthyl-3-oxobutanolato-O<1>,O<3>) bis(2-propanolato) titane, un complexe alcanolaminé du titane et des formes mercaptoalcool, mercaptide ou sulfure des diorganotines pourvues d'une liaison Sn-S ouSn=S.

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