POLYMERIC HYDROGEL

• Main Authors: YOSIKAWA, KAZUHIRO, FUJITA, TAKAHIKO, SASAHARA, SHUICHI, WAKAMATSU, SHINICHI
• Format: Patent
• Language: English; French; German
• Published: 28.04.2010
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; GENERAL PROCESSES OF COMPOUNDING; HUMAN NECESSITIES; HYGIENE; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES; WORKING-UP

Polymer hydrogel comprises polymer matrix prepared from copolymerizing nonionic monomers and cross linking monomers, a wetting agent and water. Polymer hydrogel comprises polymer matrix prepared from copolymerizing nonionic monomers and cross linking monomers, a wetting agent and water. The wetting agent contains 50 wt.% or more of a polymer (A) of tri or multi-valent alcohol monomer, and the polymer has an average molecular weight of 150-4000, and water solubility as such {number of ether groups in the polymer +hydroxyl groups in the polymer/the number of carbon atoms in the polymer} is larger or equals 1/3.