Title:
PRESSURE-SENSITIVE ADHESIVE AND SURFACE-PROTECTION MATERIAL
Document Type and Number:
Japanese Patent JP3878700
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject adhesive having a well-balanced weather resistance, durability of adhesive force and initial adhesive force and, accordingly, giving a surface-protection material easily releasable without leaving the adhesive on the protection object by using an isobutylene polymer subjected to a specific treatment.
SOLUTION: An isobutylene polymer (preferably an isobutylene homopolymer) subjected to peptizing treatment in an organic solvent with a radical generation agent (preferably benzoyl peroxide) is used as a base polymer. The polymer to be subjected to peptizing treatment preferably has a weight-average molecular weight of 350,000-1,500,000. The weight-average molecular weight of the polymer is preferably reduced by peptization to 10-80% of that of the polymer before peptization. The peptized polymer preferably has a weight-average molecular weight of 300,000-700,000 and a number-average molecular weight of 100,000-400,000. The organic solvent preferably contains a 6-8C aliphatic hydrocarbon in an amount of ≥80wt.%.
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Inventors:
Kenichi Shibata
Takeshi Sano
Mitsuyoshi Shirai
Norihide Baba
Naoyuki Nishiyama
Toshishi Umehara
Takeshi Sano
Mitsuyoshi Shirai
Norihide Baba
Naoyuki Nishiyama
Toshishi Umehara
Application Number:
JP28179996A
Publication Date:
February 07, 2007
Filing Date:
October 02, 1996
Export Citation:
Assignee:
NITTO DENKO CORPORATION
International Classes:
C09J7/02; C09J149/00; C08F8/50; (IPC1-7): C09J149/00; C09J7/02; //C08F8/50
Domestic Patent References:
| JP55069637A | ||||
| JP8081505A | ||||
| JP59184205A | ||||
| JP53146732A | ||||
| JP2196804A | ||||
| JP61108609A | ||||
| JP10101736A | ||||
| JP5239107A |
Attorney, Agent or Firm:
Tsutomu Fujimoto