摘要:
The present invention relates to adhesion-improved, curable compositions comprising a cyclic ether, a cyclic thiocarbonate, an amine and a carboxylic acid. A method of making such compositions and their use in adhesives, sealants and coatings.
摘要:
The invention relates to a method for restructuring keratin fibers, whereby a keratin fiber is contacted with (a) an aqueous preparation of at least one polysulfide of formula (I), wherein R3 represents hydroxy or the group (II), R4 represents hydrogen or the group (III), A is a bond or a bivalent saturated or mono- or polyunsaturated aliphatic or aromatic hydrocarbon group having 1 to 20 carbon atoms, which can be substituted by one or more halogen, hydroxy or carboxy groups and whereby the shortest bond between the carbonyl groups adjacent to group A consists of up to 12 carbon atoms, and wherein R1 and R2 are the same or different and are selected from R5O- and (IV), wherein R5 represents hydrogen or an alkyl group having 1 to 6 carbon atoms, n is an integer of from 1 to 100, and whereby one or more carboxyl groups may be present in the form of one or more of its/their salts, and, either simultaneously or successively, a reducing agent, and then (b) with an oxidant. The invention also relates to preparations for use in the inventive methods.
摘要:
The invention relates to a phenol-aldehyde resin containing the following constituents: a phenolic constituent without carboxyl groups, aromatic hydroxycarboxylic acid, and imidazole. The invention also relates to a method for producing one such resin, to the use thereof for the anti-corrosion treatment of bare metallic surfaces or metallic surfaces provided with a conversion layer; to an aqueous treatment solution for treating bare metallic surfaces or metallic surfaces provided with a conversion layer, said solution containing at least one inventive phenol-aldehyde resin; and to metallic strips, metallic parts or objects containing metallic parts, at least one surface thereof having been treated using one such method.
摘要:
This invention relates to compositions useful as adhesives and more particularly to the preparation of heat-cured epoxy-based adhesive compositions with improved impact resistance and good adhesion to oily metal substrates.
摘要:
The invention relates to salts from at least one imidazole of general formula (I), wherein R1, R2, R3 and R4 are the same or different and represent hydrogen, an alkyl group with 1 to 20, preferably 1 to 10, especially 1 to 4 carbon atoms or a substituted or unsubstituted aryl group or arylalkyl group with 6 to 10 carbon atoms, and at least one aliphatic or aromatic monocarboxylic or dicarboxylic acid. The molar ratio of carboxylic acid to imidazole based on the functionality of the acid is 1:1.1 to 1:6. The invention also relates to a method for producing the imidazole salts, to their use and to epoxy resins that contain these salts.
摘要:
The invention relates to copolymers containing fluorine, aqueous compositions containing said copolymers, and the use of said copolymers and compositions for surface treatment.
摘要:
The invention relates to hardening compositions, comprising a hardening component and a m-hydroxybenzene derivative of general formula (I): where Y = carboxyl, carboxylate, or straight-chain or branched alkyl, optionally substituted with hydroxy, amino, carboxyl and/or carboxylate groups and R1, R2 and R3 independently = H or OH, where R1 and R3 are not simultaneously OH, with the proviso that when the hardening composition is a thermally-hardening component of a multi-component epoxy-based system, the hardening composition is free of transition metal oxides of the copper and zinc groups and, when the hardening component is an epoxy-based thermally-hardening component, the above is not a self-hardening component. The invention further relates to the use of the m-hydroxybenzene derivative as aging inhibitor in coating agents and adhesives and a method for coating or gluing of substrates.
摘要:
The invention relates to a two-component polyurethane adhesive based on a polyol component and a polyisocyanate component. An adhesive bond, produced with said adhesive, of two sheets of steel coated with a cathodic electrodeposition paint has an impact peel strength of at least 11 N/mm according to ISO 11343 at a temperature of 40° C. The invention also relates to an additive for polyurethane adhesives and to the use of said additive.
摘要:
The present invention relates to, 1,3-oxathiolane-2-thione compounds of the general formula (I): wherein R1 and R2 are the same or different, each of which denotes a straightchain or branched alkoxy residue with 1 to 6 carbon atoms or an aryloxy or aralkyloxy residue, R3 is different or the same as R1 or R2 or an aliphatic residue, an amino residue, a halogen residue, an aromatic or heteroaromatic residue, or an araliphatic or heteroaraliphatic residue, R4 is a bridging group selected from the groups consisting of aliphatic, heteroaliphatic, araliphatic, heteroaraliphatic, aromatic and heteroaromatic groups and R5 is hydrogen, an aliphatic, heteroaliphatic, araliphatic, heteroaraliphatic, aromatic, heteroaromatic, cycloaliphatic or heterocycloaliphatic group or R4 and R5 form a cycloaliphatic, cycloheteroaliphatic, aromatic or heteroaromatic residue, which is optionally substituted with an aliphatic, heteroaliphatic residue serving as a bridging group to the silicone atom and X and Y are different and selected from oxygen and sulfur and mixtures of such compounds. A further objective is to provide a method of production of such compounds, compounds synthesized from the 1,3-oxathiolane2-thiones and their use in a variety of coating and bonding applications.