摘要:
The present invention relates to the use of enzymes and/or whole-cell catalysts for the removal of undesired by-products from crosslinkable preparations.
摘要:
A device for activating a curable material comprising a source of an activator component in gaseous form. The device has a chamber for holding the gaseous form of the activator; and either a dispensing arrangement for dispensing the gaseous form of the activator from the chamber onto the curable material or a product pathway for allowing introduction of the curable material into the chamber so as to activate the curable material by contact with the gaseous form of the activator component within the chamber. A kit form includes the curable material and the activator.
摘要:
A device for priming a substrate surface, said device comprising: i) a source for a primer component in gaseous form; ii) a chamber for holding the gaseous form of the primer component; and at least one of iii) a) a dispensing arrangement for dispensing the gaseous form of the primer component from the chamber onto the substrate surface to be primed, said dispensing arrangement comprising a conduit connecting the chamber and the dispensing outlet, and b) a product pathway for allowing introduction of the substrate to be primed into the chamber so as to prime the surface by contact with the gaseous form of the primer component held within the chamber. The source of the primer component may preferably be solvent-free and / or non-flammable. The device finds important utility in the priming of non-polar or highly crystalline substrates for subsequent bonding using curable adhesive compositions and, in particular, cyanoacrylate adhesive compositions.
摘要:
The invention relates to the use of aqueous dispersions containing at least 50 wt-% (in relation to the solid body) of polyvinyl acetate copolymers A and at least one polymer B which is different from said latter and which comprises hydroxy and/or ionic groups, for producing a barrier layer on film-shaped or flat substrates.
摘要:
A two-component composition consisting of a component A comprising epoxides having a number-average molecular weight (M N ) of 150 to 5000 g/mol with at least 2 epoxide groups per molecule, a component B comprising a reaction product prepared from araliphatic polyamines and optionally further amines, unsaturated carboxylic acids and/or derivatives thereof and aliphatic and/or aromatic polyepoxides in a molar ratio of amine to the sum total of unsaturated carboxylic acid and/or derivatives thereof and polyepoxide of 1:0.4 to 1:0.95, to give a product having primary amino groups and having a number-average molecular weight (M N ) below 5000 g/mol.
摘要:
The invention relates to adhesive compositions containing at least one cyanoacrylic acid ester, at least one polyester and at least 10 % in weight of at least one plasticizer. The invention also relates to a method for producing said type of adhesive compositions, to the use thereof for medical purposes and to the use of at least one polyester in the production of cyanoacrylate-adhesives in order to increase the tensile strength and/or the modulus of elasticity during the hardening process.
摘要:
A device for activating a curable cyanoacrylate-based material comprising a source of activator component in gaseous form. The device has a chamber for holding the gaseous form of the activator; and either a dispensing arrangement for dispensing the gaseous form of the activator from the chamber onto the curable material or a product pathway for allowing introduction of the curable material into the chamber so as to activate the curable material by contact with the gaseous form of the activator component within the chamber. A kit form includes the curable component and said device comprising the source of the activator component in gaseous form.