Abstract: A zinc-rich electrostatic powder is prepared comprising zinc incorporated homogeneously in an epoxy resin powder.

Abstract: Non-toxic tertiary amines having very low vapor pressures and substantially insolubility in water and fats are employed as free radical catalyst activators for adhesive compositions comprising polyurethane polymers or elastomers dissolved in an addition polymerizable combination of an acrylic or methacrylic monomer, a copolymerizable monomer containing a free carboxylic acid group and a non-activated free radical polymerization catalyst.

Abstract: A peroxy catalyst activator is dissolved in a methyl methacrylate, ethyl methacrylate or styrene lacquer containing, in addition, an adhesion promotor, e.g., an acrylic or methacrylic compound such as the carboxylic acids, amides esters having in the ester moiety amino groups or epoxy groups. The lacquer comprises a copolymer of the monomers dissolved in a volatile liquid solvent such as a mixture of toluene and isopropanol. In use, the lacquer containing the activator is applied to at least one of two substrates and allowed to dry. Thereafter, an adhesive composition containing peroxy catalyst is applied to at least one substrate and both substrates are brought into contact and held until the adhesive bond is formed.The lacquer acts to seal porous substrates and permits the cure to take place rapidly without air inhibition. It forms a surface which retains its activity over a long time period, running into years. Thus, component parts may be coated with the lacquer and stored until needed.

Abstract: Non-toxic tertiary amines having very low vapor pressures and substantially insolubility in water and fats are employed as free radical catalyst activators for adhesive compositions comprising polyurethane polymers or elastomers dissolved in an addition polymerizable combination of an acrylic or methacrylic monomer, a copolymerizable monomer containing a free carboxylic acid group and a non-activated free radical polymerization catalyst.

Abstract: A process for improving the processability of high molecular weight neoprene polymers which comprises treating a solution of said polymers in an organic solvent with an organic peroxide at room temperature in the presence of oxygen to reduce the molecular weight of said neoprene and lower the viscosity of said solution.

Abstract: Pipe sections of polyester fiberglass, epoxy fiberglass or of other diverse or same materials are adhesively joined together or to reaction vessels by applying to one mating surface an adhesive composition comprising a solution of non-reactive elastomer as for example, butadieneacrylonitrile rubber dissolved in a mixture of polymerizable acrylic monomers and acrylic acid monomer such as methyl methacrylate and acrylic acid, containing a polymerization catalyst such as benzoyl peroxide, and applying to the other mating surface a tertiary amine activator, bringing the mating surfaces together and allowing the adhesive to cure to a set. In another embodiment the tertiary amine is encapsulated in a rupturable microsphere and dispersed in the adhesive composition. The microspheres may be ruptured before or after the adhesive is applied.

Abstract: Non-toxic tertiary amines having very low vapor pressures and substantially insolubility in water and fats are employed as free radical catalyst activators for adhesive compositions comprising polyurethane polymers or elastomers dissolved in an addition polymerizable combination of an acrylic or methacrylic monomer, a copolymerizable monomer containing a free carboxylic acid group and a non-activated free radical polymerization catalyst.

Abstract: Improved, fast curing adhesives, with and without fillers, and articles bonded therewith are provided. The adhesive comprises a first part made up of a thermoplastic, non-reactive elastomeric polymer dissolved in an addition polymerizable combination of an acrylic or methacrylic monomer, a copolymerizable monomer containing at least one free carboxylic acid group, and a non-activated free radical addition polymerization catalyst system, and a second part comprising an activator for the free radical catalyst system. Exemplary of such a formulation is a first part made up of a elastomer, e.g. an acrylonitrile/butadiene rubber dissolved in a mixture of acrylic acid and methyl methacrylate, each of the three components being present in equal amounts. About 5 weight percent benzoyl peroxide and about 0.1 weight percent hydroquinone are dissolved in the mix. The resulting formulation has a high degree of relative stability in the absence of an activator for the benzoyl peroxide. An appropriate second part, i.e.

Abstract: A one-liquid cold setting adhesive comprising a thermoplastic, non-reactive polyurethane polymer dissolved in an addition-polymerizable combination of an acrylic or methacrylic monomer other than the acids, a copolymerizable monomer containing at least one free carboxylic group, a non-activated free radical addition polymerization catalyst system and an activator for the free radical catalyst system encapsulated in pressure-rupturable microspheres or beads having a composition which is substantially insoluble in the presence of the other components of the mixture for a relatively long time period. Exemplary of this adhesive formulation is a polyester polyurethane containing no free isocyanate groups dissolved in a mixture of methacrylic acid and methyl methacrylate, each of the three components being present in equal amounts. Included in the mix is benzoyl peroxide and hydroquinone.

Abstract: Graphic arts media are provided which offer raised, three-dimensional effects. A basic medium is formulated of a colorant, film-forming binder, a solvent vehicle and thermally expandable microspheres. The microspheres are treated to preclude or inhibit solvation in the solvent vehicle by coating with a compound which is a non-solvent for the microspheres but which preferentially wets the surface thereof. Alkyl alcohols having about 3 to 5 carbon atoms in the alkyl chain are employed.The medium is selectively applied to a substrate, dried, and heated to expand the microspheres.

Abstract: Raised prints and graphic designs on fabrics which can safely and effectively be drycleaned and washed are provided by formulating a cross-linkable polymer printing medium with about 1 to 45 weight percent thermally expandable microspheres, applying said medium to a fabric, heating at a temperature of about 180.degree. to 250.degree. F to expand the microspheres and cross-link the polymer, and then curing for about 1 minute at a temperature of about 300.degree. F.

Abstract: Improved, fast curing adhesives, with and without fillers, and articles bonded therewith are provided. The adhesive comprises a first part made up of a thermoplastic, non-reactive polyurethane polymer dissolved in an addition polymerizable combination of an acrylic or methacrylic monomer, a copolymerizable monomer containing at least one free carboxylic acid group, and a non-activated free radical addition polymerization catalyst system, and a second part comprising an activator for the free radical catalyst system. Exemplary of such a formulation is a first part made up of a polyester urethane, e.g., the condensation polymer of polyethylene adipate and toluene di-isocyanate containing no free isocyanate, dissolved in a mixture of acrylic acid and methyl methacrylate, each of the three components being present in equal amounts. About two weight percent benzoyl peroxide and about 0.1 weight percent hydroquinone are dissolved in the mix.