PRESSURE-SENSITIVE ACRYLIC ADHESIVE, ITS ADHESIVE SHEETS AND THEIR PRODUCTION

• Main Authors: MOROISHI YUTAKA, KAMIYA KATSUHIKO, SATO HIROTAKA, NATSUME MASAYOSHI
• Format: Patent
• Language: English
• Published: 10.06.1997
• Edition: 6
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide a method for producing a pressure-sensitive acrylic adhesive, capable of easily corresponding to the change of a polymerization raw material and stabilizing the conversion, mol.wt., etc., of the polymer, and substantially not using a solvent. SOLUTION: This method for producing a pressure-sensitive acrylic adhesive comprises continuously bulk-polymerizing polymerization raw materials containing a monomer consisting mainly of a (meth)acrylic acid alkyl ester, other monomers and a polymerization initiator, containing a polymer in an amount of 10-60wt.% based on the total amount of the monomers and the polymer and having a viscosity of 20-400 poises at the ordinary temperature in a reactor which has a structure for renewing the surface of the continuously supplied content and simultaneously continuously transferring the content and which is thermally controlled to a prescribed temperature over the whole region of the transfer process.