Usm Corporation

Bostik, Inc.

Gerhard Piestert

Heinz G Gilch

Herbert Bauer

Bodo Muller

Two-component polyurethane sealants, in particular for the direct glazing of motor vehicles, comprising (A) a pasty polyurethane component containing a polyurethane prepolymer having free isocyanate groups, and a curing agent, and (B) a pasty water-containing component, component (A) containing a blocked curing agent which can be liberated by water, and component (B) containing the water, reversibly bonded to a carrier substance which liberates the watering a delayed manner after components (A) and (B) have been mixed.

Two component polyurethane sealant

2-component polyurethane sealants for the direct glazing of motor vehicles, comprising (A) a pasty polyurethane component containing a polyurethane prepolymer having free isocyanate groups, and a curing agent, and (B) a pasty solvent-containing component, where component (A) contains at least one latent, solvent-activatable curing agent which can be activated by means of solvents, and component (B) contains a polar, aprotic solvent and water reversibly bonded to a carrier substance which liberates the water in a delayed manner after components (A) and (B) have been mixed.

Two-component polyurethane sealants, and a mixing method therefor

Two-component polyurethane sealants, in particular for the direct glazing of motor vehicles, comprising (A) a pasty polyurethane component containing a polyurethane prepolymer having free isocyanate groups, and a curing agent, and (B) a pasty water-containing component, component (A) containing a blocked curing agent which can be liberated by water, and component (B) containing the water, reversibly bonded to a carrier substance which liberates the water in a delayed manner after components (A) and (B) have been mixed.

Novel, improved adhesive compositions which are curable at ambient temperature to form adhesive bonds between substrates without external application of heat, light or other radiation. The adhesive compositions comprise one or more ethylenically unsaturated compounds such as polymerizable acrylic or methacrylic acid esters, a source of free radicals, and an activator comprising a pyrazoline compound.

Adhesive compositions

Novel, improved adhesive compositions curable at ambient temperature to form adhesive bonds between opaque, impervious, substrates without external application of heat, light or other radiation. The adhesive compositions of this invention comprise one or more ethylenically unsaturated monomers, a source of free radicals, and an activator comprising an azine dye material or the reaction product of an azine dye material with a reducing agent.

Adhesive compositions and method

The invention provides improved bonding methods and bonded laminates using multi-part adhesive compositions having first and second parts. The first part of the adhesive composition comprises free radical polymerizable monomers and a source of free radicals; the second part comprises an activator for initiation of polymerization of the monomer. According to the invention, flexible, activator carrying elements are positioned between layers of the first part to provide effective bonding between substrate surfaces which may be spaced apart from each other by relatively large gaps.

Multi-part adhesive laminates with activator carrying element

An improved adhesive composition formed by combining two parts. One part includes one or more polymerizable materials comprising one or more acrylate or methacrylate groups per molecule and a source of free radicals comprising an organic peroxide, hydroperoxide, perester or peracid. The other part includes an activator which is a specifically defined organic material which can cooperate with the source of free radicals to initiate addition polymerization of the polymerizable materials.

Adhesive composition

Adhesive compositions comprising polyfunctional (meth)acrylate monomers, a source of free radicals, adhesion promotors which are poly(meth)acrylates having carboxylic acid groups pendant on pyromellitic acid dianhydride residues of the molecular chain and a compatible elastomer.

An adhesive composition formed by combining two parts capable of causing polymerization to form adhesive bonds rapidly. One part comprises polymerizable vinyl monomer, selected chloro-sulphonated polyethylenes or mixtures of sulphonyl chlorides and chlorinated polyethylenes, compatible monomeric material having three or more ethylenically unsaturated double bonds. The other part comprises an activator.

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Schwetzingen, Germany

Gerhard Piestert