Abstract:
A sound-absorbing, moisture-resistant lining useful for interior surfaces of a car body. The lining is a flexible cold-curable polyurethane foam obtained in the absence of any organic foaming agent. Application to a motor vehicle part containing such a lining in the form of a door assembly wherein the said lining is attached to the door by over fitting a laminated panel.
Abstract:
Method and apparatus for providing a foamed mass of thermoplastic e.g. a hot melt adhesive on a substrate by introducing a foaming agent to the composition which has been melted by heating in excess of 100 DEG C. The foaming agent is provided by water entrained in a carrier gas and is preferably introduced to the thermoplastic as it is dispensed from an applicator. The invention permits foaming of adhesives using readily available raw materials and simple equipment readily derivable from existing hot melt adhesive applicators.
Abstract:
Early-rain resistant sealing composition based on aqueous acrylate polymer dispersions. It contains from 0.1 to 6 % by weight of a polysaccharide which is water-soluble or highly swellable in water.
Abstract:
A copolyamide adhesive composition comprising a diamine component and a dicarboxylic acid component. The diamine component comprises at least two diamines and the dicarboxylic acid component comprises at least two dicarboxylic acids, wherein one of the diamines or dicarboxylic acids is an asymmetric mono-alkyl branched monomer, wherein the composition is free from aliphatic omega aminocarboxylic acids or lactams having 12 carbon atoms or less, and wherein the copolyamide has a Tg less than 100 DEG C. Use of such a copolyamide composition as a textile adhesive or a non-woven binder or for hot-melt bonding rigid materials.
Abstract:
The invention relates to an intumescent one-component sealant based on polyurethane and containing an intumescent agent and a vitreous fusible filler. The intumescent agent and the vitreous filler have been pretreated by reaction with an isocyanate having a functionality of at least 2. The sealant is stable in storage and is an effective fire barrier in the event of fire.
Abstract:
The hot-melt adhesive comprises: (A) a first component containing essentially no water or water-containing substance, and comprising at least one primary diamine having 10 to 100 carbon atoms and at least one organic compound having simultaneously a primary amine function and a hydrolysable silane function, and (B) a second component containing essentially no water or water-containing substance, and comprising an organic compound having functions capable of reacting with the primary amine functions of the diamine of components (A) and with the primary amine functions of the organic compound of component (A), releasing water during said reaction. Application in joining amorphous or waterproof materials.
Abstract:
The invention relates to a silyl-containing polymer that is used, together with a tackifying resin to form an adhesive composition capable of storing and delivering drugs to the skin of a user. Typically the composition is formed into a patch which shows excellent adhesion to the skin even when drugs and other additives are dissolved into the composition.
Abstract:
A system for a cross-linkable hot-melt adhesive, comprising (A) a first composition which contains no epoxy groups and comprises: (a) at least one polymer chosen from thermoelastic polymers and synthetic rubbers; (b) at least one compound containing at least one grouping which may react with epoxy groups; (c) at least one tackifying resin; and (d) if required, at least one plasticizer or a wax; and (B) a second composition which comprises: (a) if required, at least one polymer chosen from thermoelastic polymers and synthetic rubbers; (b) at least one compound containing at least one epoxy group; (c) at least one tackifying resin; (d) if required, at least one plasticizer or a wax; and (e) if required, at least one activator of the reaction between the reactive groupings of component (Ab) and the epoxy functions of component (Bb). The system may be used to assemble two objects.
Abstract:
Heat curable compositions, particularly solvent-based adhesive compositions suitable for use e.g. in flocking processes, are described and claimed. Known heat curable compositions require a relatively high temperature for cure. A one part non-toxic storage stable composition is provided which is cured by heat and comprises a polyurethane prepolymer formed from the reaction between a first NCO terminated prepolymer, an oxime blocking agent and a trifunctional primary amino compound used in a substantially stoichiometric amount to the amount of isocyanate groups of the first prepolymer available for reaction. The quantity of blocking agent is so chosen that statistically only one functional group of the triamine is reacted with the NCO groups of the first prepolymer available for reaction leaving two amine groups available for reaction with isocyanate groups of the prepolymer when they are unblocked by heating.
Abstract:
In a process for the premixing of at least two pasty materials during introduction into a mixer, the two material strands are supplied to the mixer in the form of thin layers contiguous with one another. An appliance for carrying out this process comprises at least two containers (20, 22), for example cartridges of a two-component sealing compound or the like, the outflow connection pieces (24, 26) of which are arranged parallel and next to one another and connected to one another for joint coupling to a mixer. At least one of the outflow connection pieces (24, 26) has an outflow spout (32, 34) which projects transversely relative to the material strand in the direction of the other outflow connection piece and penetrates into the material strand of the latter and which emits a layer-shaped stream, whilst the other outflow connection piece is provided with a corresponding recess.