Abstract: 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.

Abstract: 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.

Abstract: Curable compositions containingA) an epoxy resin having on average more than one epoxy group per molecule,B) a carboxylic anhydride curing agent for component A) andC) about 5 to 40% by weight, relative to the amount of the components A), B) and C), of a liquid mixture of C1) a polyalkylene glycol based on polypropylene glycol or polybutylene glycol having two to about six hydroxyl, carboxyl, carboxylic anhydride or glycidyl end groups and of C2) an elastomeric copolymer based on butadiene, a polar, ethylenically unsaturated comonomer and, if appropriate, further ethylenically unsaturated comonomers having carboxylic acid, hydroxyl, mercapto or glycidyl ether end groups are described. Components C1) and C2) can also occur together in a segmented copolymer.

Abstract: 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.

Abstract: Curable compositions are described comprising(A) an epoxy resin having on average more than one epoxide group per molecule,(B) a curing agent which can be activated at an elevated temperature for component (A),(C) a liquid copolymer based on butadiene, acrylonitrile and, if appropriate, further ethylenically unsaturated comonomers, and(D) a selected segmented copolymer consisting essentially of recurring soft segments containing polypropylene glycol units or polybutylene glycol units and selected hard segments having a softening point above 25.degree. C. These compositions are suitable for use as, for example, adhesives.