A method for surfacing a polymeric composite article and/or for joining (for example, by bonding or by co-curing) the article and an adherend (for example, a second polymeric composite article) comprises (a) providing a cured or curable polymeric composite article; (b) providing a curable composition comprising (1) at least one thermosetting resin, and (2) at least one preformed, substantially non-functional, particulate modifier comprising at least one elastomer; and (c) directly or indirectly applying the composition to at least a portion of at least one surface of the article.

A method for surfacing a polymeric composite article and/or for joining (for example, by bonding or by co-curing) the article and an adherend (for example, a second polymeric composite article) comprises (a) providing a cured or curable polymeric composite article; (b) providing a curable composition comprising (1) at least one thermosetting resin, and (2) at least one preformed, substantially non-functional, particulate modifier comprising at least one elastomer; and (c) directly or indirectly applying the composition to at least a portion of at least one surface of the article.

Provided is an optical pressure-sensitive adhesive composition that gives a pressure-sensitive adhesive layer having such heating reworkability as to be easily removed from a component such as cover glass at a temperature higher than the service temperature of an image display device. The optical pressure-sensitive adhesive composition of the present invention gives a release force X of 4.0 N/20 mm or less, where the release force X is a release force determined by applying a film to a glass plate through a pressure-sensitive adhesive layer made from the optical pressure-sensitive adhesive composition, and puling the film at a temperature of 100° C., a peel angle of 180 degrees, and a tensile speed of 50 mm/min.

Provided is a PSA sheet that can bond well with at least a prescribed bonding strength to an adherend before a curing treatment and that can greatly prevent adhesive transfer during separation from the adherend after the curing treatment even when exposed to a high temperature. Provided is a PSA sheet having a PSA layer comprising carbon-carbon double bonds. The PSA sheet satisfies a property that the PSA layer has an elastic modulus of 22 MPa or greater, determined by nanoindentation after a heating/curing treatment in which the PSA sheet is heated at 180° C. for one hour, left standing at 25° C. for 30 minutes and then irradiated with UV rays at an intensity of 60 mW/cm.sup.2.

The present invention relates to a process for preparing a waterborne dispersion comprising amphiphilic block copolymer comprising at least blocks [A] and [B], and polymer P comprising ethylenically unsaturated monomer(s) different from monomer(s) (i) (monomer(s) (iii)), whereby the amount of block copolymer is higher than 0.5 and lower than 50 wt. %, based on the total weight of monomers used to prepare the block copolymer and polymer P, wherein the process comprises at least the following steps: (I) subjecting at least ethylenically unsaturated monomer(s) (i) bearing acid-functional groups to a free-radical polymerization process in an aqueous medium in the presence of a free radical initiator and a cobalt chelate complex to obtain block [A], (II) subjecting at least ethylenically unsaturated monomer(s) (ii) different from monomer(s) (i) to an emulsion polymerization process in aqueous medium in the presence of block [A] and a free radical initiator, whereby the amount of ethylenically unsaturated monomer(s) (ii) in block [B] is at least 70 wt. %, relative to the total weight amount of monomers used to prepare block [B] and whereby the ethylenically unsaturated monomer(s) (ii) is (are) selected from the group consisting of methacrylic acid esters, dialkyl esters of itaconic acid, methacrylonitrile, α-methyl styrene and any mixture thereof, (III) subjecting at least ethylenically unsaturated monomer(s) (iii) different from monomer(s) (i) to an emulsion polymerization process in aqueous medium at a pH in the range of from 5 to 10 in the presence of the amphiphilic block copolymer to obtain the block copolymer-polymer P, and the process further comprises deactivating the cobalt chelate complex, which remains from step (I), prior to and/or during step (II).

The present invention relates to a process for preparing a waterborne dispersion comprising amphiphilic block copolymer comprising at least blocks [A] and [B], and polymer P comprising ethylenically unsaturated monomer(s) different from monomer(s) (i) (monomer(s) (iii)), whereby the amount of block copolymer is higher than 0.5 and lower than 50 wt. %, based on the total weight of monomers used to prepare the block copolymer and polymer P, wherein the process comprises at least the following steps: (I) subjecting at least ethylenically unsaturated monomer(s) (i) bearing acid-functional groups to a free-radical polymerization process in an aqueous medium in the presence of a free radical initiator and a cobalt chelate complex to obtain block [A], (II) subjecting at least ethylenically unsaturated monomer(s) (ii) different from monomer(s) (i) to an emulsion polymerization process in aqueous medium in the presence of block [A] and a free radical initiator, whereby the amount of ethylenically unsaturated monomer(s) (ii) in block [B] is at least 70 wt. %, relative to the total weight amount of monomers used to prepare block [B] and whereby the ethylenically unsaturated monomer(s) (ii) is (are) selected from the group consisting of methacrylic acid esters, dialkyl esters of itaconic acid, methacrylonitrile, α-methyl styrene and any mixture thereof, (III) subjecting at least ethylenically unsaturated monomer(s) (iii) different from monomer(s) (i) to an emulsion polymerization process in aqueous medium at a pH in the range of from 5 to 10 in the presence of the amphiphilic block copolymer to obtain the block copolymer-polymer P, and the process further comprises deactivating the cobalt chelate complex, which remains from step (I), prior to and/or during step (II).

The present invention relates to a process for preparing a waterborne dispersion comprising amphiphilic block copolymer comprising at least blocks [A] and [B], and polymer P comprising ethylenically unsaturated monomer(s) different from monomer(s) (i) (monomer(s) (iii)), whereby the amount of block copolymer is higher than 0.5 and lower than 50 wt. %, based on the total weight of monomers used to prepare the block copolymer and polymer P, wherein the process comprises at least the following steps: (I) subjecting at least ethylenically unsaturated monomer(s) (i) bearing acid-functional groups to a free-radical polymerization process in an aqueous medium in the presence of a free radical initiator and a cobalt chelate complex to obtain block [A], (II) subjecting at least ethylenically unsaturated monomer(s) (ii) different from monomer(s) (i) to an emulsion polymerization process in aqueous medium in the presence of block [A] and a free radical initiator, whereby the amount of ethylenically unsaturated monomer(s) (ii) in block [B] is at least 70 wt. %, relative to the total weight amount of monomers used to prepare block [B] and whereby the ethylenically unsaturated monomer(s) (ii) is (are) selected from the group consisting of methacrylic acid esters, dialkyl esters of itaconic acid, methacrylonitrile, α-methyl styrene and any mixture thereof, (III) subjecting at least ethylenically unsaturated monomer(s) (iii) different from monomer(s) (i) to an emulsion polymerization process in aqueous medium at a pH in the range of from 5 to 10 in the presence of the amphiphilic block copolymer to obtain the block copolymer-polymer P, and the process further comprises deactivating the cobalt chelate complex, which remains from step (I), prior to and/or during step (II).

A thin adhesive tape includes a base and an adhesive layer provided on one surface of the base, wherein the base has a thickness of 2 to 25 μm, the adhesive layer has a thickness of 0.1 to 10 μm, the adhesive tape has a thickness of 30 μm or less, the adhesive tape has a peel adhesion of 0.50 N/10 mm or more in accordance with JIS Z 0237:2000, and the adhesive tape has a strength to repel members calculated by the following formula of 70 MPa.Math.mm or less, the adhesive tape being excellent in a balance between fixability of members and followability to members:
Strength to repel members (MPa.Math.mm)=tensile elastic modulus (MPa) of adhesive tape×thickness (mm) of adhesive tape.

Pressure sensitive adhesive sheet has a shear storage elastic modulus of 3×10.sup.4 Pa or more at 80° C. In the pressure sensitive adhesive sheet, an absolute value of a difference ΔG′ between a shear storage elastic modulus at 25° C. after a weather resistance test and a shear storage elastic modulus at 25° C. before the weather resistance test is 5×10.sup.4 Pa or less, wherein the weather resistance test is conducted by applying light from a xenon lamp with an irradiation intensity of 0.63 W/cm.sup.2 at a wavelength of 340 nm for 500 hours. An increment in the amount of transmitted light b* before and after the weather resistance test is preferably 0.5 or less.

The present application relates to an adhesive film a first polymer comprising a first (meth)acrylate resin and at least one type or more types of a monomer of the following Chemical Formula 1; and a second polymer comprising a second (meth)acrylate resin, a method for manufacturing the same, and a foldable display device comprising the same:

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