A multilayer adhesive tape in which an interface separation between layers does not occur even at in extremely low temperature atmosphere is provided. The multilayer adhesive tape sequentially includes: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer, in which attaching force among the first outer adhesive layer, the intermediate adhesive layer, and the second outer adhesive layer is maintained after the multilayer adhesive tape is treated in liquefied nitrogen for 15 seconds.

A pressure sensitive adhesive composition is described that comprises a (meth)acrylic polymer comprising polymerized units of (meth)acrylic ester monomer having a Tg less than 0° C. and ethylenically unsaturated monomer comprising a pendent functional group crosslinked with an amine or carboxylic acid group of at least one amino acid. Also described are aqueous pressure sensitive adhesive compositions, adhesive-coated articles, and methods.

The present invention is to provide an adhesive composition which comprises a copolymer A which contains a recurring unit having a cyclic ether structure and a recurring unit having a benzophenone structure, and a copolymer B which contains a recurring unit having a betaine structure and a recurring unit having a hydroxyl group, a cured product thereof, and a method for producing the cured product. The adhesive composition of the present invention is capable of curing in water, has high hydrophilicity, and is capable of forming a cured product having an excellent ability to inhibit adhesion of biological substances.

The present invention is to provide an adhesive composition which comprises a copolymer A which contains a recurring unit having a cyclic ether structure and a recurring unit having a benzophenone structure, and a copolymer B which contains a recurring unit having a betaine structure and a recurring unit having a hydroxyl group, a cured product thereof, and a method for producing the cured product. The adhesive composition of the present invention is capable of curing in water, has high hydrophilicity, and is capable of forming a cured product having an excellent ability to inhibit adhesion of biological substances.

A double-sided optically clear adhesive is provided. The double-sided optically clear adhesive includes a first adhesive layer and a second adhesive layer. The first adhesive layer includes a first resin and a first thermal-crosslinking agent. The first resin includes a hydroxyl group. The first thermal-crosslinking agent includes a first group. The second adhesive layer includes a second resin and a second thermal-crosslinking agent. The second resin includes a hydroxyl group. The second thermal-crosslinking agent includes a second group. The ratio of the equivalent number of the first group of the first thermal-crosslinking agent to the equivalent number of the hydroxyl group of the first resin is represented by r1. The ratio of the equivalent number of the second group of the second thermal-crosslinking agent to the equivalent number of the hydroxyl group of the second resin is represented by r2, wherein r1<r2≤0.8 and r2−r1≤0.025.

A double-sided optically clear adhesive is provided. The double-sided optically clear adhesive includes a first adhesive layer and a second adhesive layer. The first adhesive layer includes a first resin and a first thermal-crosslinking agent. The first resin includes a hydroxyl group. The first thermal-crosslinking agent includes a first group. The second adhesive layer includes a second resin and a second thermal-crosslinking agent. The second resin includes a hydroxyl group. The second thermal-crosslinking agent includes a second group. The ratio of the equivalent number of the first group of the first thermal-crosslinking agent to the equivalent number of the hydroxyl group of the first resin is represented by r1. The ratio of the equivalent number of the second group of the second thermal-crosslinking agent to the equivalent number of the hydroxyl group of the second resin is represented by r2, wherein r1<r2≤0.8 and r2−r1≤0.025.

Adhesives, particularly reversible adhesives, reversible adhesive hydrogel meshes and polymer formulations that may be used in preparation of the reversible adhesive hydrogel meshes are disclosed. The polymer formulations may comprise a reversible monomer of a reversible adhesive polymer, acrylic acid (AA), an acrylate cross-linker, a photo-initiator for free radical polymerization, and a solvent. The disclosure also relates to a wound dressing comprising the reversible adhesive hydrogel meshes. Such wound dressings are particularly suitable for treatment of damaged sensitive tissue, for example, wounds formed on a fragile skin.

Adhesives, particularly reversible adhesives, reversible adhesive hydrogel meshes and polymer formulations that may be used in preparation of the reversible adhesive hydrogel meshes are disclosed. The polymer formulations may comprise a reversible monomer of a reversible adhesive polymer, acrylic acid (AA), an acrylate cross-linker, a photo-initiator for free radical polymerization, and a solvent. The disclosure also relates to a wound dressing comprising the reversible adhesive hydrogel meshes. Such wound dressings are particularly suitable for treatment of damaged sensitive tissue, for example, wounds formed on a fragile skin.

A method of inverse emulsion polymerisation using an oil phase comprising a hydrocarbon oil obtainable from a gas to liquids process (a GTL oil) is described, in addition to an emulsion comprising a GTL oil and the use of a reaction product of an alk(en)yl substituted succinic anhydride and an amino alcohol to emulsify the emulsion.

Disclosed is a preparation method of an all-weather self-healing stretchable conductive material, which uses acrylic acid and modified polyglutamic acid as a substrate, adds Fe.sup.3+ to form coordination, adjusts the volume ratio of water and glycerin, and heats to generate radical polymerization, so as to obtain a uniform double-layer three-dimensional network structure. The obtained polyacrylic acid and polyglutamic acid composite hydrogel has good mechanical properties and characteristics of rapid self-healing. A composite carbon film is prepared by depositing a metal layer of 20 nm to 80 nm thick on a single-layer aligned carbon film by magnetron sputtering, and then the composite hydrogel is adhered to each of the upper and lower sides of the composite carbon film respectively to form an all-weather self-healing stretchable conductive material of a sandwich structure. The preparation method of the invention is simple, the source of raw materials is plenty, and the obtained materials have good electrical and mechanical properties and have broad application prospects in the fields of flexible stretchable devices, wearable devices, and soft-bodied robots and the like.