The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 2003
Filed:
Jul. 25, 2001
Hiroaki Kishioka, Ibaraki, JP;
Masahiro Ohura, Ibaraki, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
A pressure-sensitive adhesive sheet comprising a layer of a crosslinked pressure-sensitive adhesive, which is formed by 100 parts by weight of a homopolymer or a copolymer of a monomer containing an alkyl (meth)acrylates, as a principal component, 0.001 to 5 parts by weight of a silane-coupling agent, 0.001 to 5 parts by weight of a surfactant and a crosslinking agent, wherein a sol component of the crosslinked pressure-sensitive adhesive has a weight-average molecular weight of not less than 300,000 and a proportion of a low-molecular component having a molecular weight of not more than 100,000 in the sol component is not more than 15% by weight in the measurement of the molecular weight by the gel permeation chromatography method, which the sheet showing excellent weathering resistance capable of maintaining good outward appearance for a prolonged period of time without generating lifting or bubbles on the adhesive interface even under severe conditions such as long exposure to UV rays, while satisfying re-workability by which its pressure-sensitive adhesive upon release from a functional film does not remain on the adherend (glass surface).