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Transparent EVA heat insulating material and preparation method thereof

A thermal insulation material and transparent technology, applied in the direction of adhesive additives, non-polymer adhesive additives, adhesives, etc., can solve the problems of thermal insulation, transparency and adhesion, and achieve high visible light transmission Satisfactory efficiency, transparency, and good application prospects

Inactive Publication Date: 2010-11-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a transparent EVA interlayer that can be used to manufacture heat-insulating laminated glass interlayers in view of the problem that the EVA material used in the interlayer film for laminated glass in the prior art cannot have both heat insulation, transparency and adhesiveness. Preparation method of thermal material

Method used

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  • Transparent EVA heat insulating material and preparation method thereof
  • Transparent EVA heat insulating material and preparation method thereof
  • Transparent EVA heat insulating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In terms of parts by mass, 0.3 parts of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester as an antioxidant, 0.2 parts of 2,5-dimethyl-2 , 5-two (tert-butyl peroxy) hexane joins 100 parts of VA weight content as 33% EVA pellets (ethylene-vinyl acetate copolymer) as cross-linking curing agent and mix uniformly. The mixture is blended and extruded with an extruder, and the temperature is controlled at 90°C. Then the extruded product was remelted and molded, and the temperature was controlled at 145°C and the pressure was 15MPa to obtain the EVA interlayer film A-0 with a thickness of 0.5mm. Then the heat insulation experiment, thermal conductivity, light transmittance and adhesion of EVA interlayer film A-0 were carried out respectively.

[0028] Such as figure 1 As shown, the EVA interlayer A-0 was tested by the heat shield test method. The test device for the heat insulation box test method includes a 250W infrared light source 1, a the...

Embodiment 2

[0037]In terms of parts by mass, the specific surface area of ​​6 parts is 150m 2 / g of nano-silica (surface treated with 3 parts of γ-aminopropyltriethoxysilane) as a thermal insulation modifier, 0.2 parts of triethylene glycol bis[β-(3-tert-butyl- 4-hydroxyl-5-methylphenyl) propionate] as antioxidant, 1.0 parts of tert-butyl peroxide cumene as cross-linking curing agent to join 100 parts of VA weight content is the EVA pellet of 28% ( Ethylene-vinyl acetate copolymer) mixed uniformly. The mixture is blended and extruded with an extruder, and the temperature is controlled at 90°C. Then the extruded product was remelted and molded, and the temperature was controlled at 145° C. and the pressure was 15 MPa to obtain an EVA interlayer film A-1 with a thickness of 0.5 mm. Conduct heat insulation experiments, thermal conductivity, light transmittance and adhesion tests on the EVA interlayer film. Test method is the same as embodiment 1.

Embodiment 3

[0039] In terms of parts by mass, the specific surface area of ​​6 parts is 200m 2 / g of nano-silica (surface treated with 3 parts of γ-aminopropyltriethoxysilane) as a thermal insulation modifier, 0.2 parts of triethylene glycol bis[β-(3-tert-butyl- 4-hydroxyl-5-methylphenyl) propionate] as antioxidant, 1.0 parts of tert-butyl peroxide cumene as cross-linking curing agent to join 100 parts of VA weight content is the EVA pellet of 28% ( Ethylene-vinyl acetate copolymer) mixed uniformly. The mixture is blended and extruded with an extruder, and the temperature is controlled at 90°C. Then the extruded product was remelted and molded, and the temperature was controlled at 145° C. and the pressure was 15 MPa to obtain an EVA interlayer film A-2 with a thickness of 0.5 mm. Conduct heat insulation experiments, thermal conductivity, light transmittance and adhesion tests on the EVA interlayer film. Test method is the same as embodiment 1.

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Abstract

The invention relates to a transparent EVA heat insulating material and a preparation method thereof. The preparation method comprises the following steps of: uniformly mixing 100 parts of heat insulating modifying agent and 1.0 to 5.0 parts of silane coupling agent to prepare a heat insulating modifying agent after surface treatment; uniformly mixing 100 parts of ethylene-vinyl acetate copolymer, 0.2 to 1.5 parts of crosslinking curing agent, 0 to 0.3 part of antioxidant and 1 to 15 parts of the heat insulating modifying agent after the surface treatment; and controlling the temperature to be between 70 and 110 DEG C, and performing blending and extrusion on a prepared mixture by using an extruder to obtain a transparent EVA granular material. The EVA granular material can be directly used as a hot melt adhesive for a heat insulating device, and can be used for manufacturing a heat insulating laminated glass intermediate film. The EVA rubber film can ensure that laminated glass has high heat insulating properties and keeps high adhesive strength and transparency.

Description

technical field [0001] The invention relates to a heat insulating material with ethylene-vinyl acetate copolymer (EVA) as the base material. In particular, it relates to a transparent EVA heat-insulating material with high bonding strength and excellent heat-insulating performance that can be used to manufacture heat-insulating laminated glass interlayer films and a preparation method thereof. Background technique [0002] Laminated glass is a deep-processed glass product bonded by two or more pieces of glass and a viscoelastic polymer film between the glass pieces. Laminated glass improves the toughness, resilience, viscosity and shear damping of the glass due to the strong toughness bonding between the interlayer between the glass and the glass, so that the laminated glass has a strong resistance to collision impact safety and noise isolation Therefore, it has become a new type of decorative glass material with good adaptability and durability, and is increasingly favored...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K9/06C08K3/36C09J123/08C09J11/04C03C27/12
Inventor 李光吉冯晖
Owner SOUTH CHINA UNIV OF TECH
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