Aqueous vulcanizing adhesive
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsHans Scheer, Wolf-Dieter Beiersdorf, Hans-Joachim Purps
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Abstract
The adhesive strength of an aqueous binder dispersion consisting of: a halogenated copolymer which, in addition to other components, contains an alkylation-active monoalkenylaromatic alkyl halide; polyfunctional aromatic nitroso compounds; pigments; carbon black; anti-foaming agents; emulsifiers; and other additives, used for vulcanizing rubber onto substrates which are stable under the conditions of vulcanization, is improved, and the use of blocked isocyanates is avoided. This is achieved by adding, to increase the adhesive strength, homopolymers or copolymers of vinyl acetate that are also saponified to a certain extent, as well as, optionally, other customary additives.
Claims21
A water-based binder dispersion for vulcanizing rubber onto vulcanization-stable substrates, said dispersion consisting essentially of water and:
- (A) a halogen-containing copolymer consisting of polymerized units of:
- 60 to 97% by weight of at least one 2,3-dihalo-1,3-butadiene;
- 2 to 33% by weight of at least one aromatic monoalkenyl alkyl halide corresponding to the formula:
- ##STR2## in which X is selected from the group consisting of hydrogen, chlorine, bromine and iodine;
- Y is selected from the group consisting of hydrogen, chlorine and bromine;
- Z is selected from the group consisting of hydrogen, chlorine and bromine and A is selected from the group consisting of hydrogen, chlorine, bromine and a C.sub.1-3 alkyl group, with the proviso that, of Y, Z and A, at least one is chlorine or bromine and, where A is an alkyl group, at least one of Y and Z is chlorine or a bromine, and a=1 or 2 and b=0, 1 or 2, with the proviso that at least one b is at least 1;
- and
- 0. 5 to 10% by weight of at least one olefinically unsaturated monomer which is at least copolymerizable with the conjugated diene monomer and different from the aromatic monoalkenyl alkyl halide,
- (B) an aromatic polynitroso compound containing at least two nitroso groups attached directly to non-adjacent ring carbon atoms,
- (C) one or more auxiliaries selected from the group consisting of pigments, carbon black, foam inhibitors, and emulsifiers, and
- (D) a partly saponified copolymer of vinyl acetate that contains polymerized units of one or more comonomers selected from the group consisting of olefins, halogenated olefins, vinyl ethers, olefinically unsaturated carboxylic acids, esters of olefinically unsaturated carboxylic acids, olefinically unsaturated dicarboxylic acids, and esters of olefinically unsaturated dicarboxylic acids, said water-based binder dispersion being free from masked polyisocyanates.
The binder dispersion of claim wherein 1,3-dinitrosobenzene, 1,4-dinitrosobenzene or mixtures thereof are used as the aromatic polynitroso compounds.
A water-based binder dispersion for vulcanizing rubber onto vulcanization-stable substrates, said dispersion consisting essentially of water and:
- (A) a halogen-containing copolymer consisting of polymerized units of:
- 60 to 97% by weight of at least one 2,3-dihalo-1,3-butadiene;
- 2 to 33% by weight of at least one aromatic monoalkenyl alkyl halide corresponding to the formula:
- ##STR3## in which X is selected from the group consisting of hydrogen, chlorine, bromine and iodine;
- Y is selected from the group consisting of hydrogen, chlorine and bromine;
- Z is selected from the group consisting of hydrogen, chlorine and bromine and A is selected from the group consisting of hydrogen, chlorine, bromine and a C.sub.1-3 alkyl group, with the proviso that, of Y, Z and A, at least one is chlorine or bromine and, where A is an alkyl group, at least one of Y and Z is chlorine or a bromine, and a=1 or 2 and b=0, 1 or 2, with the proviso that at least one b is at least 1;
- and
- 0. 5 to 10% by weight of at least one olefinically unsaturated monomer which is at least copolymerizable with the conjugated diene monomer and different from the aromatic monoalkenyl alkyl halide,
- wherein the halogen-containing polymer is partly saponified to the corresponding hydroxyalkyl compound,
- (B) an aromatic polynitroso compound containing at least two nitroso groups attached directly to non-adjacent ring carbon atoms,
- (C) one or more auxiliaries selected from the group consisting of pigments, carbon black, foam inhibitors, and emulsifiers, and
- (D) a partly saponified homopolymer or copolymer of vinyl acetate, said water-based binder dispersion being free from masked polyisocyanates.
Dependencies are inferred from the claim text.