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Interlayer film for laminated glass and laminated glass

A technology of laminated glass and intermediate film, applied in the direction of glass/slag layered products, layered products, synthetic resin layered products, etc., to achieve the effect of suppressing the increase of YI value

Active Publication Date: 2019-03-22
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These voids are particularly likely to occur when light and heat are applied to laminated glass

Method used

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  • Interlayer film for laminated glass and laminated glass
  • Interlayer film for laminated glass and laminated glass
  • Interlayer film for laminated glass and laminated glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0161] Preparation of Composition X for Forming the First Layer:

[0162] The average polymerization degree of polyvinyl acetal resin (polyvinyl butyral (PVB) resin, polyvinyl alcohol (PVA) 2300, the content rate of hydroxyl group 23.2 mol%, the degree of acetylation 12.5 mol%, the degree of acetalization 64.3 mol %) 100 parts by weight, 60 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as a plasticizer, TINUVIN 765 (manufactured by BASF Corporation, N-alkyl type, molecular weight 509) 0.2 parts by weight and 0.2 parts by weight of BHT (2,6-di-t-butyl-p-cresol, molecular weight: 220) were mixed to obtain a composition X for forming the first layer.

[0163] Preparation of composition Y for forming the second and third layers:

[0164] Polyvinyl acetal resin (polyvinyl butyral (PVB) resin, polyvinyl alcohol (PVA) with an average degree of polymerization of 1700, a hydroxyl content of 34.5 mol%, a degree of acetylation of 0.8 mol%, butyralized 64.8 mol %) 100 ...

Embodiment 2～21 and comparative example 1～5

[0170] As shown in the following Tables 1 to 3, except that the types and contents of the components contained in the first layer, the second layer, and the third layer were set, an interlayer film was produced in the same manner as in Example 1. and laminated glass.

[0171] (evaluate)

[0172] (1) The glass transition temperature of the first layer

[0173] Kneaded products having respective compositions of the first layer in Examples and Comparative Examples were prepared. The obtained kneaded product was press-molded with a press-molding machine to obtain a resin film A having an average thickness of 0.35 mm. The obtained resin film A was left to stand under the conditions of 25 degreeC and 30% of relative humidity for 2 hours. After leaving to stand for 2 hours, the viscoelasticity was measured using "ARES-G2" manufactured by TAINSTRUMENTS CO., LTD. As a jig, a parallel plate with a diameter of 8 mm was used. The measurement was performed under the conditions of lowe...

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Abstract

The present invention provides an interlayer film for a laminated glass that is less likely to generate voids at the end of a laminated glass and can suppress an increase in the YI value at the end of the laminated glass. The interlayer film for laminated glass of the present invention has: a first layer containing polyvinyl acetal resin and a plasticizer; a second layer containing polyvinyl acetal resin and a plasticizer, and is disposed on the first layer. On the first surface side of the first layer, the first layer also contains a hindered amine light stabilizer with an alkyl or alkoxy group bonded to the nitrogen atom of the piperidine structure, and the glass transition temperature of the second layer is above 32°C.

Description

technical field [0001] The present invention relates to an interlayer film for laminated glass used for laminated glass. In addition, the present invention relates to a laminated glass using the above-mentioned interlayer film for laminated glass. Background technique [0002] Even if laminated glass is damaged by external impact, the amount of glass shards scattered is small, and it is excellent in safety. Therefore, the above-mentioned laminated glass is widely used in automobiles, rail vehicles, aircraft, ships, buildings, and the like. The above-mentioned laminated glass can be produced by sandwiching an interlayer film for laminated glass between a pair of glass plates. [0003] As an example of the above-mentioned interlayer film for laminated glass, an interlayer film is disclosed in the following Patent Document 1, which has a low tendency to yellow, has a high transmittance to UV-A rays and visible light, and has a high transmittance to UV-B rays. Rays have low t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C27/12B32B17/10B32B27/18B32B27/30C08K5/103C08K5/3435C08L31/04
CPCB32B27/18C08K5/103C08K5/3435B32B27/08B32B27/306B32B2307/71B32B2605/006B32B17/10036B32B17/10678B32B27/42B32B2307/30C08K5/521B32B27/22B32B17/10761C08K5/13C08K5/49C08L29/14C08K5/5435B32B17/10605C03C27/10B32B17/10293B32B17/1055C03C10/00C08J2329/14C08K2201/012
Inventor 岩本达矢吉田章吾
Owner SEKISUI CHEM CO LTD
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