The present disclosure relates to radiopaque PVA polymers where the PVA has a first pendant group and a second pendant group, wherein the first pendant group comprises a first phenyl group bearing 1 to 5 iodine atoms, and the second pendant group comprises either (a) a second phenyl group bearing 1 to 3 substituents selected from the group W and optionally 1 to 4 iodine substituents, the group(s) W and the optional iodines being the sole substituents of the second phenyl group. Each W is selected from —OH, —COOH, —SO.sub.3H, —OPO.sub.3H.sub.2, —O—(C.sub.1-4alkyl), —O—(C.sub.1-4alkyl)OH, —O—(C.sub.1-4alkyl)R.sup.2, —O—(C.sub.2H.sub.5O).sub.qR.sup.1 —(C═O)—O— C.sub.1-4alkyl and —O—(C═O)C.sub.1-4alkyl; wherein R.sup.1 is H or C.sub.1-4 alkyl; R.sup.2 is —COOH, —SO.sub.3H, or —OPO.sub.3H.sub.2; q is an integer from 1 to 4; wherein the group W may be in the form of a pharmaceutically acceptable salt; or (b) a pyridyl group; which is optionally in the form of a pyridinium ion.

The present disclosure relates to radiopaque PVA polymers where the PVA has a first pendant group and a second pendant group, wherein the first pendant group comprises a first phenyl group bearing 1 to 5 iodine atoms, and the second pendant group comprises either (a) a second phenyl group bearing 1 to 3 substituents selected from the group W and optionally 1 to 4 iodine substituents, the group(s) W and the optional iodines being the sole substituents of the second phenyl group. Each W is selected from —OH, —COOH, —SO.sub.3H, —OPO.sub.3H.sub.2, —O—(C.sub.1-4alkyl), —O—(C.sub.1-4alkyl)OH, —O—(C.sub.1-4alkyl)R.sup.2, —O—(C.sub.2H.sub.5O).sub.qR.sup.1 —(C═O)—O— C.sub.1-4alkyl and —O—(C═O)C.sub.1-4alkyl; wherein R.sup.1 is H or C.sub.1-4 alkyl; R.sup.2 is —COOH, —SO.sub.3H, or —OPO.sub.3H.sub.2; q is an integer from 1 to 4; wherein the group W may be in the form of a pharmaceutically acceptable salt; or (b) a pyridyl group; which is optionally in the form of a pyridinium ion.

An adhesive sheet includes cyclodextrin and a derivative polymer in which an alkyl group having a carbon number of 6 to 18 is introduced into a hydrophilic polymer, and at least a part of the alkyl group is in the form of inclusion with the cyclodextrin.

A thermoplastic elastomer for profile control and water shutoff is prepared from the following raw materials in parts by weight: 8-10 parts of a component A, 1-3 parts of a strong acid, 1-3 parts of a hydrophobic modifier and 100-105 parts of water. The component A is one of polyethylene glycol, polyvinylether, polyvinyl alcohol, copolymer of acrylamide and acrylonitrile. The strong acid is one of concentrated hydrochloric acid and concentrated sulfuric acid. The hydrophobic modifier is any one of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, β-propiolactone, γ-butyrolactone, δ-valerolactone, methyltriacetylsilane, methyltrimethylsilane, butyl acrylate and ethylene glycol dimethacrylate. The thermoplastic elastomer for profile control and water shutoff provided by the disclosure has the advantages of one-step preparation and molding, strong deformation capability, temperature resistance, salt tolerance, strong stability and the like, and is suitable for large-scale production and application.

A thermoplastic elastomer for profile control and water shutoff is prepared from the following raw materials in parts by weight: 8-10 parts of a component A, 1-3 parts of a strong acid, 1-3 parts of a hydrophobic modifier and 100-105 parts of water. The component A is one of polyethylene glycol, polyvinylether, polyvinyl alcohol, copolymer of acrylamide and acrylonitrile. The strong acid is one of concentrated hydrochloric acid and concentrated sulfuric acid. The hydrophobic modifier is any one of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, β-propiolactone, γ-butyrolactone, δ-valerolactone, methyltriacetylsilane, methyltrimethylsilane, butyl acrylate and ethylene glycol dimethacrylate. The thermoplastic elastomer for profile control and water shutoff provided by the disclosure has the advantages of one-step preparation and molding, strong deformation capability, temperature resistance, salt tolerance, strong stability and the like, and is suitable for large-scale production and application.

Embodiment relates to film for bonding, and a light-transmitting laminate including the same and the like, a film for bonding comprising an embossed surface, wherein the embossed surface has an A2/A1 value of 1 or less are disclosed. A film for bonding have improved in deairing stability during formation of a light transmitting laminate, an edge sealing characteristic, and the like by controlling characteristics of a embossed surface.

Embodiment relates to film for bonding, and a light-transmitting laminate including the same and the like, a film for bonding comprising an embossed surface, wherein the embossed surface has an A2/A1 value of 1 or less are disclosed. A film for bonding have improved in deairing stability during formation of a light transmitting laminate, an edge sealing characteristic, and the like by controlling characteristics of a embossed surface.

Disclosed in the present invention are a polyvinyl alcohol (PVA)-based degradable plastic, a preparation method therefor and application thereof, and a recycling method therefor. The preparation method comprises the following steps: a PVA solution is subjected to a chemical grafting reaction under an acidic condition under the action of a modifier; there are a phenyl group, an aldehyde group, and at least one group capable of forming a hydrogen bond with PVA in a structural formula of the modifier. The polyvinyl alcohol-based degradable plastic provided in the present invention has the advantages of being high in transparency, high in mechanical strength, not affected by environmental humidity, easy to degrade, good in thermal stability and good in biocompatibility, and has the advantages of recyclability, low costs, easy large-scale preparation and the like.

Disclosed in the present invention are a polyvinyl alcohol (PVA)-based degradable plastic, a preparation method therefor and application thereof, and a recycling method therefor. The preparation method comprises the following steps: a PVA solution is subjected to a chemical grafting reaction under an acidic condition under the action of a modifier; there are a phenyl group, an aldehyde group, and at least one group capable of forming a hydrogen bond with PVA in a structural formula of the modifier. The polyvinyl alcohol-based degradable plastic provided in the present invention has the advantages of being high in transparency, high in mechanical strength, not affected by environmental humidity, easy to degrade, good in thermal stability and good in biocompatibility, and has the advantages of recyclability, low costs, easy large-scale preparation and the like.

An aqueous composition includes water and a cationic polymeric resin having at least one reactive aldehyde group and formed from the reaction of glyoxal and a polymer. The polymer comprises at least one acrylamide repeating unit and at least one cationic repeating unit wherein a number of reactive aldehyde equivalents divided by a number of equivalents of residual glyoxal based on the total weight of the polymer is greater than about 1.2, wherein prior to reaction the polymer has greater than about 50 mole % acrylamide repeat units and from about 2 to about 30 mole % cationic repeating units, wherein greater than about 5 mole % of the acrylamide repeating units are converted to reactive aldehyde groups in the cationic polymer resin; and wherein the composition exhibits a viscosity gain of less than about 200%.