Ciba-geigy Corporation

Werner Rufenacht

Rolf Mulhaupt

Jeremy H Powell

Christopher S Adderley

Compositions containing A) a copolymer based on at least one 1,3-diene and at least one polar, ethylenically unsaturated comonomer and B) a phenol-terminated polyurethane, polyurea or polyurea-urethane of the formula I ##STR1## in which m is 1 or 2, n is 2 to 6, R.sup.1 is the n-valent radical of an elastomeric prepolymer which is soluble or dispersible in epoxide resins, X and Y independently of one another are --O-- or --NR.sup.3 --, it being necessary for one of these groups to be --NR.sup.3 --, R.sup.2 is an m+1-valent radical of a polyphenol or aminophenol after the removal of the phenolic hydroxy group(s) or the amino group or both the amino group and the phenolic hydroxyl group, respectively, and R.sup.3 is hydrogen, C.sub.1 -C.sub.6 alkyl or phenyl, are described. Compounds containing the components A) and B) as well as an epoxide resin C) are also described. The cured products are distinguished by a high peel strength and high resistance to crack propagation. The curable compositions can be employed, for example, as structural adhesives.

Phenol-terminated polyurethane or polyurea(urethane) with epoxy resin

The invention relates to compositions containing A) a liquid copolymer based on butadiene and at least one polar, ethylenically unsaturated comonomer, and B) a polyether prepolymer capped with hydroxyarylcarboxylic or hydroxyaralkylcarboxylic acids, or a capped polyester, polythioester or polyamide containing polyether segments. The phenolic hydroxyl group in component B) can also be etherified with epichlorohydrin and this product can be converted to a episulfide, if desired, or the phenolic hydroxyl group can be reacted with cyanogen halide to form a cyanate group. The stock compositions can be used in combination with epoxy resins to manufacture structural adhesives or sealing compounds.

Butadiene/polar comonomer copolymer and aromatic reactive end

Tough epoxy casting resins based on polybutadiene-polyoxyalkleneglycol

The invention relates to compositions containing A) a liquid copolymer based on butadiene and at least one polar, ethylenically unsaturated comonomer, and B) a polyether prepolymer capped with hydroxyarylcarboxylic or hydroxyaralkylcarboxylic acids, or a capped polyester, polythioester or polyamide containing polyether segments. The phenolic hydroxyl group in component B) can also be etherified with epichlorohydrin and this product can be converted to an episulfide, if desired, or the phenolic hydroxyl group can be reacted with cyanogen halide to form a cyanate group. The stock compositions can be used in combination with epoxy resins to manufacture structural adhesives or sealing compounds.

Composition of butadiene/polar comonomer copolymer, aromatic reactive

Curable compositions are described comprising

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Marly, Switzerland

Werner Rufenacht