摘要:
To provide a water-based polymer dispersion for isocyanate-crosslinked adhesives comprising a polymer (1) which is obtained by emulsion polymerization of a monomer composition comprising at least one monomer selected from the group consisting of an aromatic vinyl monomer and a (meth)acrylate monomer, a crosslinkable monomer, and a different monomer, in respective predetermined amounts; and a polymer (2) which is obtained by emulsion polymerization of a monomer composition comprising at least one monomer selected from the group consisting of an aromatic vinyl monomer and a (meth)acrylate monomer, a hydroxyl group-containing vinyl monomer, an ethylenically unsaturated carboxylic acid monomer, and a different monomer, in respective predetermined amounts, wherein the polymers (1) and (2) have a Tg difference of 20 to 80° C.
摘要:
A conformable tape for bonding a lens block to ophthalmic lens blanks is provided. The tape comprises a polymeric backing and a pressure-sensitive adhesive. In a first preferred embodiment the surface of the backing is a blend of an olefin polymer with a polymer having acidic functionality. The blend may be formed as the backing layer, i.e., directly on the adhesive layer of the tape, or as the outer surface layer of a multilayered backing. In a second embodiment, the surface of the backing is a copolymer of an olefin monomer with a monomer having pendant acidic functionality. A lens block may be adhered to an ophthalmic lens blank by applying a section of the tape described above to an ophthalmic lens so that the pressure sensitive adhesive of the tape contacts the lens; conforming the tape to the compound surface of the lens; and attaching a lens block to at least a portion of the polymer backing layer. The tape may be made by extruding a polymeric backing material as described above; extruding a pressure-sensitive adhesive; and contacting the polymeric backing material and the pressure-sensitive adhesive. If desired, the polymeric backing material and the pressure sensitive adhesive may be coextruded to form the tape. In most preferred embodiments, the tape may be wound into a roll without a separate liner material.
摘要:
Priming composition containing a homogeneous liquid solution containing a polymeric material and at least one water-miscible solvent in an amount sufficient to provide adhesion between wet or dry road surface materials and adhesive coated articles. The priming composition allows the marking of roadways with pressure sensitive adhesive articles even on wet or damp roadway surfaces. Also a method for priming roadway surfaces.
摘要:
There is provided hot water and alkali removable pressure-sensitive adhesive composition based on emulsion pressure-sensitive adhesive polymers used in combination with a rosin based acidic tackifier and a rosin based surfactant.
摘要:
This invention discloses solid, homogeneous and essentially random terpolymers of styrene, isobutylene and beta-pinene having a number average molecular weight of from about 1500 to about 7000, a styrene content of from about 40 to about 60 weight percent, an isobutylene content of from about 10 to about 40 weight percent, a beta-pinene content of from about 10 to about 40 weight percent and a ring and ball softening point of from about 160.degree. to about 240.degree.F.
摘要:
A hot melt composition having improved properties comprising a blend of an ethylene-vinyl acetate copolymer and a resin prepared by copolymerizing vinyl aromatic hydrocarbons containing isopropenyltoluene and a by-product fraction obtained in refining or cracking petroleum.
摘要:
The present invention provides a polyester film wherein an adhesive layer including a thermoplastic elastomer including a monovinyl substituted aromatic hydrocarbon and a conjugated diene, a compatibilizer having a glass transition temperature of 35 to 150° C., and a polyester resin having a glass transition temperature of 35 to 150° C. and a carboxyl group content of 10 to 100 mg KOH/g is laminated on a polyester substrate.
摘要:
Producing a printed circuit board, by coating a resin composition comprising an aromatic cyanate compound having two or more cyanato groups in a molecule and a radical-polymerizable resin on a circuit substrate, photo-curing the resin composition, and thermally curing the photo-cured resin composition to thereby form an insulation layer, affords an insulation layer with improved surface smoothness and excellent dielectric properties.
摘要:
An improved emulsion polymerization process utilizing at least one substantially water-insoluble ethylenically unsaturated monomer is provided for forming discrete solid polymeric particles suitable for use in coating and/or adhesive applications. During at least the initial portion of the polymerization a dissolved water-soluble polymerizable surfactant (as defined) formed by the reaction of a diallylamine, ethylene oxide, and propylene oxide and/or butylene oxide additionally is provided in the reaction zone in the continuous aqueous phase. The water-soluble polymerizable surfactant undergoes copolymerization and is substantially completely consumed during the course of the emulsion polymerization. The emulsion polymerization is carried out on a stable basis, there is no need to attempt to remove a surfactant at the conclusion of the emulsion polymerization, and the resulting polymeric particles are particularly well suited for coating and/or adhesive end uses where they form stable films and exhibit improved adhesion characteristics.
摘要:
The present invention is based upon the discovery that a styrene-butadiene composition contatining about 0.1 to 10 weight % of a monoester of maleic acid or fumaric acid provides improved bonding strength. In addition, small amounts of a functional monomer can also be included.