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Laminate

A laminated body and laminated structure technology, applied in the direction of layered products, layered product processing, synthetic resin layered products, etc., can solve problems such as difficult operation, and achieve the effect of not being easy to self-adhesive and excellent safety performance

Inactive Publication Date: 2018-09-28
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an interlayer film for laminated glass with suitable sound insulation performance is softer and easier to stretch than ordinary interlayer films for laminated glass, and has strong adhesiveness, and sometimes it becomes more difficult to handle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0207] Hereinafter, the present invention will be described in further detail based on examples and the like, but the present invention is not limited by these examples.

[0208] [Evaluation method]

[0209] (Physical property evaluation of thermoplastic resin)

[0210] The average acetalization degree, average residual vinyl ester group amount, and average residual hydroxyl group amount of PVB-1 - PVB-4 obtained in manufacture examples 1-4 were measured based on JISK6728:1977.

[0211] The hydroxyl values ​​of PVB-1 to PVB-4 obtained in Production Examples 1 to 4 were measured in accordance with JIS K1557:2007.

[0212] The ester values ​​of PVB-1 to PVB-4 obtained in Production Examples 1 to 4 were measured in accordance with JIS K0070:1992. Table 1 shows the measurement results of the average degree of acetalization, the average amount of residual vinyl ester groups, the average amount of residual hydroxyl groups, the hydroxyl value, and the ester value.

[0213] (Flexib...

manufacture example 1

[0243] In a 5-liter glass container equipped with a reflux cooler, a thermometer, and an IKARI-type stirring blade, 4050 g of ion-exchanged water and 330 g of polyvinyl alcohol (PVA-1: degree of polymerization 1700, degree of saponification 99 mol%) were put in, and the temperature was raised to 95°C. Allow polyvinyl alcohol to dissolve completely. The resulting solution was slowly cooled to 10° C. at 160 rpm with stirring for about 30 minutes, then 189 g of n-butyraldehyde and 200 mL of 20% aqueous hydrochloric acid were added, and a butyralization reaction was carried out for 50 minutes. Thereafter, the temperature was raised to 65° C. over 60 minutes, maintained at 65° C. for 120 minutes, and then cooled to room temperature. After the obtained resin was washed with ion-exchanged water, an aqueous sodium hydroxide solution was added to neutralize the remaining acid, and then it was washed with excess ion-exchanged water and dried to obtain polyvinyl butyral (PVB-1).

manufacture example 2

[0245] 330 g of polyvinyl alcohol (PVA-2: polymerization degree 1700, saponification degree 92 mol %) was added instead of PVA-1, and the consumption of n-butyraldehyde was changed to 195 g, except that PVB-2 was obtained in the same manner as in Production Example 1. .

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Abstract

An objective of the present invention is to provide a laminate that exhibits superior ease of handling and excellent safety performance when used as an interlayer film in laminated safety glass, and that is not susceptible to decreased ease of handling after having been stored for long periods. The objective is achieved by a laminate having a layered structure with at least three layers comprisinga layer (1) and a layer (2) on at least one surface of the layer (1), with at least one of the outermost layers being the layer (1), wherein the layer (1) contains a thermoplastic resin (I), the layer (2) contains a thermoplastic resin (II) and contains 4-200 parts by mass of a plasticizer A with respect to 100 parts by mass of the thermoplastic resin (II), and HV(A)>=30 where the hydroxyl numberof the plasticizer A is represented by HV(A)mgKOH / g.

Description

technical field [0001] The present invention relates to a laminate that is excellent in operability, hardly deteriorates in operability at the initial stage of production and after long-term storage, and exhibits excellent safety performance when used as an interlayer film for laminated glass. Background technique [0002] Laminated glass obtained by sandwiching a high-strength, high-transparency laminated resin sheet with excellent adhesion to glass and excellent flexibility between two sheets of glass has excellent transparency and penetration resistance, and is used in various applications such as automobile front glass. safety glass. [0003] From the viewpoint of absorbing the impact of a person or object colliding with the laminated glass, it is preferable to use a soft interlayer film for laminated glass at a use temperature, for example, a temperature around room temperature. For example, plasticized polyvinyl acetal formed from a polyvinyl acetal resin and a plasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/22B32B17/10B32B27/30C03C27/12
CPCB32B27/22B32B17/10036B32B17/10761B32B17/1099B32B17/10605B32B27/306B32B2250/03B32B2250/04B32B2250/05B32B2250/24B32B2250/40B32B7/02B32B2307/102B32B17/10B32B27/08B32B27/30B32B2307/412B32B2405/00B32B2605/006B32B2309/02B32B2309/04B32B2315/08B32B2329/06
Inventor 浅沼芳聪楠藤健
Owner KURARAY CO LTD
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