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Intermediate film for laminated glass, laminated glass using the same, and method for production of the laminated glass

A technology of laminated glass and interlayer film, applied in glass/slag layered products, chemical instruments and methods, layered products, etc., can solve the problems of transparency, reduced adhesion, insufficient moisture resistance, insufficient transparency, etc. problem, to achieve the effect of improving transparency and improving yellowing

Inactive Publication Date: 2009-04-15
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, laminated glass using PVB film as an interlayer film for laminated glass has good penetration resistance and impact resistance, but has insufficient moisture resistance, so transparency and adhesiveness may decrease after long-term use.
[0006] On the other hand, although laminated glass using EVA film can obtain excellent water resistance, adhesion and penetration resistance, there are cases where transparency is not sufficient

Method used

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  • Intermediate film for laminated glass, laminated glass using the same, and method for production of the laminated glass
  • Intermediate film for laminated glass, laminated glass using the same, and method for production of the laminated glass
  • Intermediate film for laminated glass, laminated glass using the same, and method for production of the laminated glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149] PVB and EVA sheets (thickness: 400 μm) were obtained by calendering using the following formulations as raw materials. In addition, the kneading of the compound was performed at 80° C. for 15 minutes, and the temperature of the calender rolls was 80° C., and the processing speed was 5 m / min.

[0150] (PVB sheet formation formulation (parts by mass))

[0151] PVB resin (degree of acetalization 66 mol%): 100

[0152] Plasticizer (triethylene glycol-bis(2-ethylbutyrate)): 33

[0153] UV absorber (2,2'-dihydroxy-4,4'-dimethoxybenzophenone): 0.15

[0154] (Formulation for EVA sheet formation (parts by mass))

[0155] EVA resin (vinyl acetate content 26% by weight): 100

[0156] Crosslinking agent (1,1-bis(tert-butylperoxy)3,3,5-trimethylcyclohexane): 2.0

[0157] Silane coupling agent (γ-methacryloxypropyltrimethoxysilane): 0.5

[0158] Cross-linking aid (triallyl isocyanurate): 2.0

[0159] UV absorber (2,2'-dihydroxy-4,4'-dimethoxybenzophenone): 0.15

[0160] Two s...

reference example 1

[0163] A laminated glass was produced in the same manner as in Example 1, except that 0.001 parts by mass of magnesium octanoate (adhesion modifier) ​​was added to the formulation for PVB sheet formation.

reference example 2

[0165] In the formulation for EVA sheet formation, as a UV absorber, an equivalent amount of 2-(3'-tert-butyl-2'-hydroxy-5'-methylphenyl)-5-chlorobenzotriazole is used instead A laminated glass was produced in the same manner as in Example 1 except for 2,2'-dihydroxy-4,4'-dimethoxybenzophenone.

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Abstract

The object of the present invention is to provide an intermediate film for a laminated glass having excellent transparency, adhesion, impact resistance and penetration resistance as well as excellent light resistance and weather resistance, and scarcely turning yellow in a heating treatment during its preparation. An intermediate film for a laminated glass comprising a laminate consisting of a layer (PVB layer) of a composition comprising polyvinyl butyral and a layer (EVA layer) of a composition comprising ethylene / vinyl acetate copolymer containing an organic peroxide, wherein the composition comprising polyvinyl butyral contains a benzophenone compound as an ultraviolet absorber; a laminated glass; and a process for the preparation of the same.

Description

technical field [0001] The present invention relates to an interlayer film for laminated glass used in laminated glass including thin film tempered glass, which is used in automobiles, railway vehicles, buildings, shop windows, etc., and is excellent in impact resistance, penetration resistance, security, etc. ; Also relates to laminated glass, and its manufacturing method. Background technique [0002] Generally, glass used in automobiles, especially windshields, uses laminated glass in which a transparent adhesive layer (intermediate film) is sandwiched between glass plates. The transparent adhesive layer is formed of, for example, PVB film, EVA film, etc. Due to the presence of the transparent adhesive layer, the penetration resistance of the laminated glass is improved. In addition, the shattered glass shards are attached to the transparent adhesive layer against an external impact, so that they can be prevented from scattering. Therefore, for example, even if the lami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C27/12B32B27/18B32B27/28
CPCB32B17/10788B32B17/10761
Inventor 桥本诚夫
Owner BRIDGESTONE CORP
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