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:
Jun. 17, 2014
Filed:
Dec. 28, 2011
Tatsuya Iwamoto, Kouka, JP;
Ryousuke Komatsu, Kouka, JP;
Kohei Kani, Kouka, JP;
Shogo Yoshida, Kouka, JP;
Tatsuya Iwamoto, Kouka, JP;
Ryousuke Komatsu, Kouka, JP;
Kohei Kani, Kouka, JP;
Shogo Yoshida, Kouka, JP;
Sekisui Chemical Co., Ltd., Osaka, JP;
Abstract
The present invention provides an interlayer film for a laminated glass capable of suppressing bubble formation and bubble growth even if the laminated glass is exposed to relatively high temperatures for a long time. An interlayer film for a laminated glass according to the present invention includes a first layer and a second layer laminated on one face of the first layer, each of the first layer and the second layer contains a polyvinyl acetal resin and a plasticizer, and in the case of measuring the viscoelasticity of the first layer as a resin film (glass transition temperature: Tg(° C.)), or the viscoelasticity of a resin film (glass transition temperature: Tg(° C.)) containing 100 parts by weight the polyvinyl acetal resin in the first layer and 60 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as a plasticizer, the resin film has an elastic modulus of G'(Tg+170) at (Tg+170)° C. and an elastic modulus of G′(Tg+30) at (Tg+30)° C., and provides a ratio (G′(Tg+170)/G′(Tg+30)) of 0.18 or higher.