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Multilayer polyvinyl acetal film and laminated glass including same

A polyvinyl acetal film and polyvinyl acetal resin technology, applied in the field of multilayer polyvinyl acetal film and laminated glass including the same, can solve problems such as insufficient sound insulation performance, achieve excellent sound insulation, excellent Effects of performance, excellent penetration and impact resistance

Active Publication Date: 2020-08-18
爱思开迈克沃有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the interlayer film is prepared by mixing polyvinyl acetal resins having different degrees of polymerization, and thus exhibits a temperature-dependent improved sound insulation performance, but exhibits good sound insulation performance over a wide temperature range. insufficient

Method used

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  • Multilayer polyvinyl acetal film and laminated glass including same
  • Multilayer polyvinyl acetal film and laminated glass including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1: the preparation of multilayer polyvinyl acetal film

[0068] For the preparation of multilayer films, 3 twin-screw extruders (manufacturing company: SM Platek Corporation) were used. The first extruder is used to prepare the A layer, the second extruder is used to prepare the B layer, and the third extruder is used to prepare the C layer, and the resin composition of the following layers is dropped into each extruder and Extrusion was performed at 180°C.

[0069] A layer: based on the total weight of the composition, including 73% by weight of the first polyvinyl acetal resin and 27% by weight of triethylene glycol-bis-2-ethylhexanoate (3G8) as a plasticizer Compositions.

[0070] Layer B: a composition comprising 65% by weight of the second polyvinyl acetal resin and 35% by weight of 3G8 as a plasticizer, based on the total weight of the composition.

[0071] Layer C: a composition comprising 61% by weight of the second polyvinyl acetal resin and 39% b...

Embodiment 2

[0073] Embodiment 2: the preparation of multilayer polyvinyl acetal film

[0074] A multilayer film was prepared in the same manner as in Example 1 except for using the resin composition of each layer described below.

[0075] Layer A: a composition comprising 73% by weight of the first polyvinyl acetal resin and 27% by weight of 3G8 as a plasticizer, based on the total weight of the composition.

[0076] Layer B: a composition comprising 65% by weight of the second polyvinyl acetal resin and 35% by weight of 3G8 as a plasticizer, based on the total weight of the composition.

[0077] Layer C: a composition comprising 70% by weight of the second polyvinyl acetal resin and 30% by weight of 3G8 as a plasticizer, based on the total weight of the composition.

Embodiment 3

[0078] Embodiment 3: the preparation of multilayer polyvinyl acetal film

[0079] A multilayer film was prepared in the same manner as in Example 1 except for using the resin composition of each layer described below.

[0080] Layer A: a composition comprising 73% by weight of the first polyvinyl acetal resin and 27% by weight of 3G8 as a plasticizer, based on the total weight of the composition.

[0081] Layer B: a composition comprising 70% by weight of the second polyvinyl acetal resin and 30% by weight of 3G8 as a plasticizer, based on the total weight of the composition.

[0082] Layer C: a composition comprising 61% by weight of the second polyvinyl acetal resin and 39% by weight of 3G8 as a plasticizer, based on the total weight of the composition.

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Abstract

The invention relates to a multilayered polyvinyl acetal film and laminated glass comprising same. The multilayered polyvinyl acetal film has excellent noise-reducing acoustical insulation in a wide temperature range and furthermore ensures no reduction of physical characteristics such as penetration resistance. Particularly, the multilayered polyvinyl acetal film comprises a layer A which comprises a first polyvinyl acetal resin and 24-30wt% of plasticizer, wherein the number of carbon atoms of acetal groups in the first polyvinyl acetal resin is 4-6, and furthermore the content of the acetal groups in a main chain is lower than 1wt%; a layer B which comprises a second polyvinyl acetal resin and 28-38wt% of plasticizer, wherein the number of the carbon atoms of the acetal groups in the second polyvinyl acetal resin is 4-6, and furthermore the content of the acetal groups in the main chain is 8-14wt%; and a layer C which comprises the second polyvinyl acetal resin and the plasticizer, wherein the difference between the content of the plasticizer and the content of the plasticizer of the layer B is above 2wt%.

Description

technical field [0001] The present invention relates to a multilayer polyvinyl acetal film having excellent sound insulation properties for reducing noise over a wide temperature range, and at the same time, properties such as penetration resistance, impact resistance, and laminated glass comprising the same Physical properties such as sex will not be reduced. Background technique [0002] Plasticizable polyvinyl acetals (especially polyvinyl butyral) are commonly used in the preparation of polymer sheets that can be used as laminated glass (safety glass) or as light-transmitting glass for polymer laminates An intermediate layer within a laminate. Also, the laminated glass generally refers to a transparent laminate comprising a sheet of plasticizable polyvinyl acetal, especially polyvinyl butyral, sandwiched between two sheets of glass. The laminated glass is mainly used to provide transparent barriers in building and automobile openings. The main function of laminated gl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/18B32B27/30B32B27/22B32B27/06C08L29/14C08K5/103C03C27/12B32B17/10
CPCB32B17/10B32B27/06B32B27/18B32B27/22B32B27/30B32B2250/24B32B2307/102B32B2307/56B32B2605/08C08K5/103C08L29/14
Inventor 金惠珍郑盛真宋庚洙延济源金敬研
Owner 爱思开迈克沃有限公司
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