Title:
可塑剤含有ポリビニル（イソ）アセタールからの部分層を含有する減衰特性を有する薄膜積層体
Document Type and Number:
Japanese Patent JP5755192
Kind Code:
B2
Abstract:
The film laminate comprises three layers A, B and C, where each of the layers contains a plasticizer and a polyvinyl acetal. Two outer layers A and C contain same or different polyvinyl acetal (23 wt.%) with a proportion of polyvinyl alcohol groups of 18.5-23 wt.%. An inner layer B is a polyvinyl acetal having a proportion of polyvinyl alcohol groups of 12-18 wt.%. One of the layers A, B or C contains polyvinyl(iso)acetal, and polyvinyl(n)acetal. The polyvinyl(iso)acetal results from a reaction of polyvinyl alcohol with aliphatic keto compounds having 4-10C. The film laminate comprises two outer layers A and C, and an inner layer B, where each of the layers contains a plasticizer and a polyvinyl acetal. The outer layers contain same or different polyvinyl acetal (23 wt.%) with a proportion of polyvinyl alcohol groups of 18.5-23 wt.%. The inner layer is a polyvinyl acetal having a proportion of polyvinyl alcohol groups of 12-18 wt.%. One of the layers contains polyvinyl(iso)acetal, and polyvinyl(n)acetal. The film laminate is produced by coextrusion and merging of the layers. The polyvinyl(iso)acetal results from a reaction of polyvinyl alcohol with aliphatic keto compounds having 4-10C with a branch at alpha -position or beta -position to a keto group and with aliphatic, unbranched keto compound having 2-10C. The outer layers contain same or different polyvinyl(iso)acetal, and same or different polyvinyl(n)acetal. The inner layer B comprises a different polyvinyl(iso)acetal.
Inventors:
Marks Meize
Jan Bakehuizen
Martin Steyr
Uwe Keller
Michael frank
Jan Bakehuizen
Martin Steyr
Uwe Keller
Michael frank
Application Number:
JP2012163020A
Publication Date:
July 29, 2015
Filing Date:
July 23, 2012
Export Citation:
Assignee:
Kuraray Europe GmbH
International Classes:
C03C27/12; B32B17/10; B32B27/30; C03C27/06
Domestic Patent References:
| JP2010037193A | ||||
| JP5051243A | ||||
| JP10036146A | ||||
| JP7097240A | ||||
| JP2013022963A | ||||
| JP2013023692A |
Attorney, Agent or Firm:
Einzel Felix-Reinhard
Takuya Kuno
Takuya Kuno