Abstract: A laminate with a peelable top layer is provided. The laminate comprises a substrate such as a porous board, the top layer such as a plastic top layer or a decorated metal plate, and a bonding layer between the top layer and the substrate. At least one of the substrate and the top layer is porous. An adhesive for forming the bonding layer comprises (A) an aqueous dispersion containing a polymer, which demonstrates properties that a dried film of the aqueous dispersion has a tensile strength of 1 to 28 MPa and a percentage elongation of 100 to 2000%, and (B) a water-based adhesive composition containing microspheres with thermal expansion capability, each of which is composed of a polymer shell encapsulating a gas. By use of this adhesive, the bonding layer provides a high bonding strength between the top layer and the substrate. When irradiating the laminate with ultraviolet or far infrared, while heating, the top layer can be easily peeled off from the laminate.

Abstract: A laminate with a peelable top layer is provided. The laminate comprises a substrate such as a porous board, the top layer such as a plastic top layer or a decorated metal plate, and a bonding layer between the top layer and the substrate. At least one of the substrate and the top layer is porous. An adhesive for forming the bonding layer comprises (A) an aqueous dispersion containing a polymer, which demonstrates properties that a dried film of the aqueous dispersion has a tensile strength of 1 to 28 MPa and a percentage elongation of 100 to 2000%, and (B) a water-based adhesive composition containing microspheres with thermal expansion capability, each of which is composed of a polymer shell encapsulating a gas. By use of this adhesive, the bonding layer provides a high bonding strength between the top layer and the substrate. When irradiating the laminate with ultraviolet or far infrared, while heating, the top layer can be easily peeled off from the laminate.

Abstract: A process of the invention produces a vinyl acetate polymer based emulsion by seed polymerization of vinyl acetate in an ethylene-vinyl acetate copolymer based emulsion. This process includes a step of performing seed polymerization while adding vinyl acetate to a system, and, prior to or subsequent to the step, a step of adding a polymerizable unsaturated monomer other than vinyl acetate to the system. The amount of the polymerizable unsaturated monomer other than vinyl acetate is, for example, about 0.05 to 10 parts by weight relative to 100 parts by weight of vinyl acetate. At least one monomer selected from acrylic esters, methacrylic esters, vinyl esters, and vinyl ethers can be used as the polymerizable unsaturated monomer other than vinyl acetate.

Abstract: Disclosed is a two-part adhesive comprising: (A) an aqueous emulsion liquid having a polymer component and an emulsifier component, in which at least one of the polymer component and the emulsifier component contains an anion radical; and (B) a solution having an amino-radical-containing acrylic copolymer. The amount of the polymer component in the aqueous emulsion liquid is within a range of from about 20% to about 80% by weight. When the aqueous emulsion liquid (A) contacts the solution (B) on an adherend surface, they form sticky gel adhesive.

Abstract: An antislipping composition for a fastener having a head portion, comprising a crosslinked polymer prepared by the polymerization of an olefinic unsaturated carboxylic acid and a compound represented by a general formula (1) given below ##STR1## where R is a hydrogen atom or a methyl group, and the sum of 1, m and n is larger than 0 and not larger than 500, except that where R is a hydrogen atom and n is zero, l+m is not 1, a liquid medium containing at least one compound selected from the group consisting of glycol ethers and glycerin, and silicon carbide particles having acute corner portions.

Abstract: Disclosed is a chloropren rubber adhesive composition. The adhesive composition contains a chloroprene rubber; a tackifier resin; a chlorinated polyolefin; a solvent; and a component which is selected from the group consisting of components (A) and (B). The component (A) is combination of an epoxy resin and a curing agent, and the curing agent is selected from dicyandiamide, imidazole, imidazole derivative, onium compound, ketimine compound represented by the formula (I) or a ketimine derivative. The component (B) is a silane compound having at least two reactive groups, and the reactive group is selected from an epoxy group, a vinyl group, a hydroxy group, an acryloxy group, a methacryloxy group and alkoxy groups.

Abstract: A method for producing a polychloroprene latex, which comprises copolymerizing chloroprene and an ethylenically unsaturated carboxylic acid in the presence of a polyvinyl alcohol, wherein a glycol ether is also present during the copolymerization.

Abstract: A method for producing a polychloroprene latex, which comprises copolymerizing chloroprene and an ethylenically unsaturated carboxylic acid in the presence of a polyvinyl alcohol, wherein a glycol ether is also present during the copolymerization.

Abstract: Disclosed is a water repellent for fibers, comprising an acryl-silicone graft copolymer which is prepared by a radical copolymerization reaction of an organopolysiloxane compound containing one radical polymerizable group with radical polymerizable monomers including an acrylate, a methacrylate or a mixture thereof as a main member.

Abstract: Disclosed is a felt-tipped pen type adhesive applier comprising: a container for adhesive; valve mechanism provided on the container for controllably supplying the adhesive from the container; and a server for receiving the adhesive supplied through the valve mechanism in order to serve the adhesive. The server comprises: a holder covering the outside of the valve mechanism; a member permeable to the adhesive and extending from the inside of the holder to the outside thereof and being axially slidably and fittingly supported by the holder, the permeable member cooperating with the valve mechanism to operate the valve mechanism in response to axial movement of the permeable member; a support for slidably and fittingly supporting the permeable member inside of the holder to facilitate transportation of the adhesive from the valve mechanism to the permeable member; and mechanism for preventing the adhesive from leaking out of the server due to pressure change inside the server.

Abstract: Disclosed is a heat-resistant resin composition prepared by mixing a resin composition (A) and polyamine (B), followed by heating the mixture for the hardening, said composition (A) being prepared by heating a mixture of (a) polymaleimide resin represented by a general formula: ##STR1## where R.sub.1 is an organic group having a valency of n, Xa and Xb are the same or different monovalent atoms or groups selected from the group consisting of hydrogen atom, halogen atom and organic group, and n is an integer of 1 to 4, (b) an epoxy resin having at least two epoxy groups in the molecule, and (c) a compound having one alcoholic or phenolic OH group and at least one epoxy group in the molecule.

Abstract: An adhesive injector has a piston inserted in a cylinder which is forwardly movable therein by a compressive force, the cylinder having a nozzle projecting from a front end portion thereof. The injector includes: a pair of holes defined adjacent each other in a rear end portion of the cylinder, a slit formed in the cylinder between the holes, a pin insertable through the holes, and cutout portions formed in the piston for engagement with the pin.

Abstract: Vinyl acetate resin emulsion composition produced by the addition of a water soluble compound having alcoholic OH group during emulsion-polymerization or emulsion-copolymerization reaction to vinyl acetate resin emulsion which is obtained by emulsion-polymerization or emulsion-copolymerization of vinyl acetate under the presence of polyvinyl alcohol.

Abstract: A method of injecting adhesives (7) into cracks (2) of structures (1) for sealing the cracks, involves affixing injection pipes (4) on non-sealed surface portions of the structures at the cracks and connecting an adhesives injection device (10) to each one of the injection pipes. The injection devices are comprised of transparent cylinders having scales thereon graduated toward injection, nozzles (17) thereof, and of pistons (13) which can move linearly in both directions in the cylinders. The nozzles are respectively connected to the injection pipes after adhesives are drawn into the cylinders, and the pistons are moved toward the nozzles by compression, or pushing pressure, of rubber or springs to inject the adhesives into the cracks.

Abstract: The invention provides an adhesive composition of the two-part separate application type comprising solutions A and B. The solution A is an aqueous solution of a high polymer having an amide bond or an imide bond within the molecule, or an aqueous dispersion obtained by adding a rubber latex and/or synthetic resin emulsion to the aqueous solution of the high polymer. The solution B is an aqueous solution of a dialdehyde compound, or an aqueous solution or dispersion obtained by adding a crosslinking agent for crosslinking the high polymer of the solution A to the aqueous solution of the dialdehyde compound.

Abstract: An adhesive composition which is in a wax-like or jelly-like state at room temperature comprising:(a) a water soluble or water dispersible polymer having adhesive properties;(b) an N-fatty acid acylated amino acid or a salt thereof; and(c) water or a mixture of water and one or more organic solvent(s) and/or plasticizer(s).

Abstract: An adhesive composition which is in a wax-like or jelly-like state at room temperature comprising:(a) an N-fatty acid acylated amino acid or an alkali metal salt, ammonium salt or amine salt of the acid;(b) a compound having in its molecule a polyoxyalkylene structure containing at least four oxyalkylene units;(c) a water soluble or water dispersible polymer having adhesive properties; and(d) water or a mixture of water and one or more organic solvent(s) and/or one or more plasticizer(s).