10028results about "Ester polymer adhesives" patented technology

Acrylic-based pressure sensitive adhesives are modified with a telechelic hydrocarbon oligomer. The oligomer comprises a hydrocarbon polymer chain or backbone and a functional end group, e.g., an oligomer prepared from a mono hydroxyl polybutadiene polymer and toluene diisocyanate. The oligomer attaches to the acrylic backbone of the polymer as a pendant group and in a preferred embodiment, the oligomer is mixed with the PSA shortly before the PSA is coated.

Articles are provided that include an optical film and an optically clear pressure sensitive adhesive layer on at least one outer surface of the optical film. Additionally, articles are provided that include a pressure sensitive adhesive layer that resists bubble formation when adhered to an outgassing substrate. The pressure sensitive adhesive layer in the various articles contain a (meth)acrylate block copolymer.

A polymerizable composition includes at least one monomer, a photoinitiator capable of initiating polymerization of the monomer when exposed to light, and a phosphor capable of producing light when exposed to radiation (typically X-rays). The material is particularly suitable for bonding components at ambient temperature in situations where the bond joint is not accessible to an external light source. An associated method includes: placing a polymerizable adhesive composition, including a photoinitiator and energy converting material, such as a down-converting phosphor, in contact with at least two components to be bonded to form an assembly; and, irradiating the assembly with radiation at a first wavelength, capable of conversion (down-conversion by the phosphor) to a second wavelength capable of activating the photoinitiator, to prepare items such as inkjet cartridges, wafer-to-wafer assemblies, semiconductors, integrated circuits, and the like.

A flame retardant, intumescent pressure sensitive adhesive (PSA) composition for EMI shielding gaskets, tapes, wraps, and the like. The composition is formulated as an admixture of: (a) a PSA component; (b) a halogenated first flame retardant component; (c) a metal-based second flame retardant component; and (d) a filler component of expandable, intercalated graphite particles. In a representative embodiment the PSA component (a) is acrylic-based, the halogenated first flame retardant component (b) is a polybrominated diphenyl compound such as decabromodiphenyl oxide or decabromodiphenyl ether, the metal oxide-based second flame retardant component (c) is antimony oxide, antimony trioxide, or antimony pentoxide, and the filler component (d) is graphite flake.

The present invention relates to a top coat composition, which is characterized in that it is applied to a photoresist top surface by using a polymer containing at least one structure represented by the formula [1], [2] or [3]. It is possible to produce a top coat composition solution by dissolving this top coat composition in an organic solvent. These top coat composition and top coat composition solution can be used in immersion lithography.

The present invention realizes a display device or input device having excellent ultraviolet protection property for the touch panel, display element or the like, while retaining optical characteristics, even when a small amount of or no optical film is used. The pressure-sensitive adhesive sheet of the present invention has a total light transmittance of 85% or more, a light transmittance at a wavelength of 380 nm of 5% or less, and a haze of 3% or less. The pressure-sensitive adhesive sheet preferably includes a pressure-sensitive adhesive layer containing an acrylic polymer and a triazine-based ultraviolet absorber.

A composition, including a polymer binder resin A, a UV-curing acrylate B, a heat curing agent C, and a photopolymerization initiator D. The composition includes about 20 to about 150 parts by weight of the UV-curing acrylate B per 100 parts by weight of the polymer binder resin A, and the UV-curing acrylate B is a solid or near-solid at room temperature and has a viscosity of about 10,000 cps or more at 40° C.

The invention discloses an acrylic emulsion as well as a preparation method and an application thereof. The preparation method of the acrylic emulsion comprises the following steps: (1) mixing all monomers, 1 / 4-1 / 3 of deionized water and 2 / 3-3 / 4 of anionic emulsifier in raw materials, and emulsifying the mixture for 10-30 minutes to obtain a pre-emulsion; adding the left deionized water, the leftanionic emulsifier and 1 / 20-1 / 5 of pre-emulsion to a reactor, heating the reactor to 75-85 DEG C, adding an initiator, and making the mixture react for 0.5-1 hour; and (2) dropwise adding the left pre-emulsion for 2-4 hours, preserving heat for 2 hours at 75-85 DEG C, decreasing the temperature to 60 DEG C, adding a non-ionic emulsifier, stirring for 20 minutes, cooling the mixture to 20-30 DEG C, adjusting the pH value of the mixture to 7-8, adding a cross-linking agent, stirring and discharging. The acrylic emulsion has good rebound elasticity and good batch stability, can well disperse inorganic powder and overcomes a series of defects of the existing acrylic emulsion, and the preparation process of the acrylic emulsion is simple and is easy to realize industrial production.

Non-tacky, base polymers are plasticized into pressure-sensitive adhesives and comprise: a) about 100 parts by weight of a base copolymer having a Tg greater than about 0° C., wherein the base copolymer is formed from and comprises: (1) about 50 to 70% by weight of a high Tg comonomer component, wherein the homopolymer formed from the high Tg comonomer component has a Tg of at least about 20° C.; (2) optionally, up to about 20% by weight based on the total weight of the base copolymer of an acidic comonomer; and (3) about 30 to 50% by weight of one or more low Tg (meth)acrylate comonomer, wherein the Tg homopolymer of the low Tg comonomer is less than about 20° C., and b) about 1 to about 100 parts based on the base copolymer of a nonreactive, non-volatile, non-acrylic-based plasticizing agent.

A wet-skin adhesive includes a pressure-sensitive adhesive component that includes at least one monoethylenically unsaturated (meth)acrylic acid ester comprising an alkyl group having at least 4 carbons on average and at least one monoethylenically unsaturated reinforcing monomer; and a film-forming component that includes at least one monoethylenically unsaturated (meth)acrylic acid ester comprising an alkyl group having less than 4 carbons on average and at least one hydrophilic acidic monomer, wherein the wet-stick pressure-sensitive adhesive has an initial wet skin adhesion of at least about 0.8 N / dm. Advantageously, the wet-stick adhesive has an initial wet skin adhesion that is at least about 65% of an initial dry skin adhesion.

The present invention provides a variety of extended polyacrylic acid based binder compositions comprising a low molecular weight polyacrylic acid (typically hypophosphite or sulfite terminated), a crosslinking agent (such as triethanolamine or glycerol) and one or more water soluble materials, such as lignin, low molecular weight starch and soybean protein. The extended binder composition of the present invention provides a lower cost binder composition without degrading the performance and may be selected to alter one or more characteristics of the basic binder composition such binder wetting, emulsion compatibility, dust suppression and wash water flow properties.

A one-step process using electron beam radiation to polymerize pressure sensitive adhesives on web from acrylate emulsions is disclosed. The radiation may be supplied in a single or multiple dose. Products using such pressure sensitive adhesives are also disclosed.

An adhesive composition is provided that is water-insoluble yet water-absorbent, i.e., capable of absorbing up to 15 wt. % water or more. The composition is composed of a film-forming hydrophilic polymer with at least one linear segment having a plurality of recurring polar groups along the polymer backbone, a complementary multifunctional polymer with a plurality of recurring functional groups that noncovalently bind to the polar groups on the film-forming polymer, and a plasticizer. A method for manufacturing the adhesive composition is provided as well.

The present invention has its object to provide a curable composition which comprises a guanidine compound as a non-organotin type catalyst, is less discolored, has good surface curability, depth curability, strength rise and adhesiveness, and can retain the curability even after storage; the above object can be achieved by a curable composition which comprises: (A) an organic polymer containing a silyl group capable of crosslinking under siloxane bond formation, the silyl group being a group represented by the general formula (1): —SiX3 (1) (wherein X represents a hydroxyl group or a hydrolyzable group and the three X groups may be mutually the same or different), (B) a guanidine compound (B-1) as a silanol condensation catalyst, and (C) a plasticizer, wherein the content of the component (B-1) is not lower than 0.1 part by weight but lower than 8 parts by weight per 100 parts by weight of the component (A), and a non-phthalate ester plasticizer accounts for 80 to 100% by weight of the (C) component plasticizer.

An object of the present invention is to provide an antistatic pressure-sensitive adhesive composition which is excellent in antistatic property and antistatic property with time of a non-electrification-prevented adherend (subject to be protected) upon peeling, and has reduced stainability in an adherend and is excellent in adhesion reliance, and electrification preventing pressure-sensitive adhesive sheets using the same. There is provided a pressure-sensitive adhesive composition comprising an ionic liquid, and a (meth)acryl-based polymer containing, as a monomer component, 0.01 to 20% by weight of a reactive surfactant shown by the following general formula (I) as a monomer unit. [in the formula (I), R1, R2, and R3 indicate likewise or differently hydrogen or the methyl group, R4 indicates an alkylene group of 0 to 30 in carbon number (further, 0 in carbon number means that there is no R4), R5 and R6 indicate likewise or differently alkylene groups of 1 to 30 in carbon number, m indicates the number of 0 to 50 (may not be an integer), n indicates the number of 0 to 100 (may not be an integer), m+n indicates the number of 1 to 150 (may not be an integer), and X indicates hydrogen or an anionic hydrophilic group]

An object of the present invention is to provide a pressure-sensitive adhesive composition in which electrification of a pressure-sensitive adhesive sheet can be prevented upon peeling, and staining property on an adherend can be reduced, and an antistatic pressure-sensitive sheet and surface protecting film using this. There is provided a pressure-sensitive composition comprising an ionic liquid and a polymer having a glass transition temperature Tg of 0° C. or lower as a base polymer.

A water vapor permeable, pressure sensitive adhesive composition comprising a hydrophilic, all acrylic polymer system, free of additives and having enhanced water vapor transmission which contains a significant high amount of hydroxyalkyl acrylate / methacrylate. This adhesive composition is particularly useful in surgical or medical dressing applications.

A wet stick pressure sensitive adhesive comprising the solventless polymerization product of: a) about 30 to about 70 parts by weight of an (meth)acrylate ester monomer wherein the (meth)acrylate ester monomer, when homopolymerized, has a Tg of less than about 10° C.; b) about 70 to about 30 parts by weight of a hydrophilic acidic comonomer; and c) about 10 to 100 parts based on 100 parts of the sum of components (a+b) of a non-reactive plasticizing agent, wherein the pressure sensitive adhesive adheres to wet substrate surfaces and a method of making.

The present invention provides a die attach film-provided dicing tape, which includes a dicing tape, a supporting tape and a die attach film laminated in this order, wherein the supporting tape is a tape having a self-rolling peelability, and a process for producing a semiconductor device by using the die attach film-provided dicing tape.

The present invention relates to a method for preparing an acrylic ester polymer syrup by bulk polymerization, and more particularly, to a method for preparing an acrylic ester polymer syrup, which comprises the steps of: supplying a monomer solution and an initiator solution to a monomer solution reservoir and an initiator solution reservoir, respectively; supplying the monomer solution and the initiator solution to a complete-mixing type continuous reactor, while maintaining the dissolved oxygen in the monomer solution reservoir and the initiator solution reservoir at 0.0001 to 3 ppm, separately or after mixing prior to the supply; and performing bulk polymerization continuously while maintaining the solution mixture supplied to the continuous reactor at 70 to 150 ° C. and 1 to 10 atm, with a mean residence time of 30 to 240 minutes. In accordance with the present invention, an acrylic ester polymer syrup can be obtained with a degree of polymerization of 20 to 70% at a low polymerization temperature, even with a small amount of initiator. Productivity can be improved by reducing reaction time with the use of an initiator having a short half-life and polymerization can be performed very stably and continuously without gelation.

The present invention provides a dicing / die bonding sheet which can be used as a dicing tape during dicing, enables ready separation of the semiconductor element and the adhesive layer from the pressure-sensitive adhesive layer during pickup, and in which the adhesive layer has satisfactory adhesiveness as a die bonding material. A dicing / die bonding sheet in which the pressure-sensitive adhesive layer comprises a compound (A), containing intramolecular, radiation curable carbon-carbon double bonds with an iodine value of 0.5 to 20, and at least one compound (B) selected from a group consisting of polyisocyanates, melamine-formaldehyde resins, and epoxy resins, and the adhesive layer comprises an epoxy resin (a), a phenolic resin (b) with a hydroxyl equivalent of at least 150 g / eq., an epoxy group-containing acrylic copolymer (c), comprising from 0.5 to 6% by weight of glycidyl acrylate or glycidyl methacrylate, and with a weight average molecular weight of at least 100,000, a filler (d), and a curing accelerator (e).

The present invention provides a pressure sensitive adhesive composition for optical members, which is excellent in durability, re-releasability and stress relaxation, as well as a pressure sensitive adhesive composition for optical members, which hardly increases adhesion after storage for a long time and does not leave a residual adhesive on glass upon disposal or repair. The pressure sensitive adhesive composition for optical members according to the present invention comprises 100 parts by weight of an acrylic polymer (A) having a weight-average molecular weight of 500,000 or more, containing at least 50 wt % alkyl (meth)acrylate having an alkyl group with 5 or more carbon atoms and 0.2 to 2 wt % unsaturated carboxylic acid as the monomer unit, 0.1 to 4 parts by weight of an acrylic polymer (B) having a weight-average molecular weight of 2,000 to 50,000, containing at least 70 wt % alkyl(meth)acrylate and 1 to 7 wt % unsaturated carboxylic acid as the monomer unit and having a higher carboxylic acid equivalent than that of the acrylic polymer (A), 0.01 to 1 part by weight of a silane coupling agent, and a crosslinking agent.

The present invention relates to a double-faced pressure-sensitive adhesive tape or sheet, which comprises: a base material; a pressure-sensitive adhesive layer disposed on one surface of the base material, which is a pressure-sensitive adhesive layer (A) including a pressure-sensitive adhesive composition containing an acrylic polymer (A1), and a silicone rubber fine particle (A2) in a proportion of from 3 to 50 parts by weight with respect to 100 parts by weight of the acrylic polymer (A1), the layer (A) being used so as to adhere to the liquid crystal display module unit; and another pressure-sensitive adhesive layer disposed on the other surface of the base material, which is a pressure-sensitive adhesive layer (B) including a pressure-sensitive adhesive composition containing an acrylic polymer (B1), and a low-molecular weight polymer component (B2), which contains, as a principal monomer component, an ethylenic unsaturated monomer having a glass transition temperature of from 60 to 190° C. when it is formed into a homopolymer and having a cyclic structure within the molecule thereof, and which has a weight-average molecular weight equal to or higher than 3,000 but lower than 20,000, in a proportion of from 5 to 35 parts by weight with respect to 100 parts by weight of the acrylic polymer (B1), the layer (B) being used so as to adhere to the backlight, in which the pressure-sensitive adhesive tape or sheet is for use in fixing a liquid crystal display module unit and a backlight unit.

The invention relates to a method for preparing an environment-friendly silicone-modified acrylate adhesive. Raw materials of the preparation method comprise a basic monomer, a modified monomer and an auxiliary agent, wherein the basic monomer comprises a hard monomer, a soft monomer and a crosslinking monomer; the modified monomer comprises a silane monomer, a coupling agent and inorganic nano-powder; the crosslinking monomer is glycidyl acrylate or glycidyl methacrylate; and the grain diameter of the inorganic nano-powder is less than 80 nanometers. In the preparation method, the crosslinking monomer adopts the glycidyl acrylate or the glycidyl methacrylate so as to be environment-friendly. The product prepared by the method is a nanometer / silicone double-modified molecular composite polymer material. The molecular composite material is combined with the advantages of two polymer materials, namely silicone and polyacrylic ester and an inorganic nanometer material, and has better performance and broad application.

The invention is based on the discovery that a remarkable improvement in the performance of bismaleimide thermosets can be achieved through the incorporation of an imide-extended liquid bismaleimide monomer. This imide-extended liquid bismaleimide monomer is readily prepared by the condensation of an appropriate dianhydride with two equivalents of an appropriate diamine to give an amine terminated compound. This compound is then condensed with an excess of maleic anhydride to yield an imide-extended liquid bismaleimide monomer.

A wet-stick pressure-sensitive adhesive is provided wherein the pressure-sensitive adhesive comprises: at least one copolymerized monoethylenically unsaturated (meth)acrylic acid ester monomer, wherein the (meth)acrylic acid ester monomer, when homopolymerized, has a Tg of less than about 10° C.; at least one copolymerized hydrophilic acidic comonomer; and at least one nonreactive copolymer comprising at least two copolymerized alkylene oxides, at least one of which is hydrophobic and at least one of which is hydrophilic.

Articles are provided that include an optical film and an optically clear pressure sensitive adhesive layer on at least one outer surface of the optical film. Additionally, articles are provided that include a pressure sensitive adhesive layer that resists bubble formation when adhered to an outgassing substrate. The pressure sensitive adhesive layer in the various articles contain a (meth)acrylate block copolymer.