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Ethylene-vinyl acetate copolymer adhesive film and preparation method thereof

A technology of vinyl acetate and copolymer, which is applied in the field of ethylene-vinyl acetate copolymer film and its manufacture, can solve problems such as limiting the synergistic effect of acidic substances, and achieve excellent long-term UV aging resistance, avoid negative effects, and excellent durability The effect of heat and humidity aging

Active Publication Date: 2014-12-17
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the structural characteristics of hindered amines, it presents different acidity and alkalinity. When it is highly alkaline, it can cause resistance to the acidic components in the film, limiting its synergistic effect with the acidic substances in the system.

Method used

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  • Ethylene-vinyl acetate copolymer adhesive film and preparation method thereof
  • Ethylene-vinyl acetate copolymer adhesive film and preparation method thereof
  • Ethylene-vinyl acetate copolymer adhesive film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The proportion of raw materials in this specific embodiment is based on the following parts by weight.

[0067] 100 parts of ethylene-vinyl acetate copolymer, wherein: the vinyl acetate content in the ethylene-vinyl acetate copolymer is 25%;

[0068] Cross-linking agent: 0.1 part of 1,1-bis(tert-butylperoxide)-3,3,5-trimethylcyclohexane;

[0069] Co-crosslinking agent: 0.1 part of trimethylolpropane trimethacrylate;

[0070] Antioxidant (thiopropionate): 0.1 part of pentaerythritol tetrakis (3-octylthiopropionate);

[0071] Ultraviolet light absorber: 0.5 part of 2-hydroxy-4-n-octyloxybenzophenone;

[0072] Light stabilizer: 0.5 part of a polymer of succinic acid and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidinol;

[0073] Tackifier: 0.1 part of γ-methacryloyloxypropyltrimethoxysilane.

[0074] The ethylene-vinyl acetate copolymer adhesive film of this specific embodiment is manufactured by the following method:

[0075] Step 1: Add cross-linking agent, co-cross-linki...

Embodiment 2

[0079] The proportion of raw materials in this specific embodiment is based on the following parts by weight.

[0080] 100 parts of ethylene-vinyl acetate copolymer, and the vinyl acetate content in the ethylene-vinyl acetate copolymer is 33%;

[0081] Cross-linking agent: 1.0 part of 1,1-bis(tert-butylperoxide)-3,3,5-trimethylcyclohexane;

[0082] Co-crosslinking agent: 1.0 part of triallyl isocyanurate;

[0083] Antioxidant (thiopropionate): 0.5 part of pentaerythritol tetrakis (3-dodecyl thiopropionate);

[0084] Ultraviolet light absorber: 0.1 part of 2-hydroxy-4-n-octyloxybenzophenone;

[0085] Light stabilizer: 0.05 part of bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate;

[0086] Tackifier: 0.5 part of γ-methacryloyloxypropyltrimethoxysilane.

[0087] The ethylene-vinyl acetate copolymer adhesive film of this specific embodiment is manufactured by the following method:

[0088] Step 1: Add cross-linking agent, co-cross-linking agent, tackifier, and ultraviolet li...

Embodiment 3

[0092] The proportion of raw materials in this specific embodiment is based on the following parts by weight.

[0093] 100 parts of ethylene-vinyl acetate copolymer, and the vinyl acetate content in the ethylene-vinyl acetate copolymer is 28%;

[0094] Cross-linking agent: 0.5 part of tert-butyl peroxide-2-ethylhexyl carbonate;

[0095] Co-crosslinking agent: 0.5 part of triallyl isocyanurate;

[0096] Antioxidant (thiopropionate): 0.25 part of pentaerythritol tetrakis (3-decyl thiopropionate);

[0097] Ultraviolet light absorber: 0.25 part of 2-hydroxy-4-n-octyloxybenzophenone;

[0098] Light stabilizer: 0.25 part of bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate;

[0099] Tackifier: 0.25 part of γ-methacryloyloxypropyltrimethoxysilane.

[0100] The ethylene-vinyl acetate copolymer adhesive film of this specific embodiment is manufactured by the following method:

[0101] Step 1: Add cross-linking agent, co-cross-linking agent, tackifier, and ultraviolet ligh...

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Abstract

The present invention discloses an ethylene-vinyl acetate copolymer adhesive film and a preparation method thereof. The ethylene-vinyl acetate copolymer adhesive film comprises, by weight, 100 parts of an ethylene-vinyl acetate copolymer, 0.1-1.0 part of a cross-linking agent, 0.1-1.0 part of an auxiliary cross-linking agent, 0.1-0.5 part of a tackifier, 0.1-0.5 part of an ultraviolet light absorber, 0.05-0.5 part of a hindered amine light stabilizer, and 0.1-0.5 part of an antioxidant, wherein the antioxidant is thiopropionate. The preparation method comprises the following concrete steps: sequentially adding a cross-linking agent, an auxiliary cross-linking agent, a tackifier and an ultraviolet light absorber to a stirring kettle, adopting water bath heating to uniformly stir, adding a hindered amine light stabilizer, uniformly stirring, adding thiopropionate, uniformly stirring, uniformly spraying the mixed material on the surface of an ethylene-vinyl acetate copolymer, and extruding the mixed mixture through an extruder. With the present invention, color pollution due to the reaction of the hindered phenol antioxidant is avoided, and the prepared ethylene-vinyl acetate copolymer adhesive film has characteristics of excellent long term ultraviolet aging resistance and excellent dampness-heat aging resistance.

Description

technical field [0001] The invention relates to a sealing adhesive film, in particular to an ethylene-vinyl acetate copolymer adhesive film for encapsulating solar cell components and a manufacturing method thereof. Background technique [0002] With the increasing exhaustion of traditional fossil energy, clean and renewable energy represented by solar energy has come into the spotlight. Although the silicon wafer itself as a solar cell has a service life of more than 30 years, the working life of the ethylene-vinyl acetate copolymer film that protects the silicon wafer from external erosion is much shorter. In the harsh outdoor weather environment, the adhesive film will quickly age and turn yellow, or even degummed and cracked, causing the solar cell module to crack or be eroded by the weather, resulting in a decrease in the photoelectric conversion efficiency of the entire cell module or short-circuit damage and failure. Therefore, it can be said that the quality and lif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/06C09J123/08C09J7/00
Inventor 卢毅黄赋崔隆宇钟连兵肖毅
Owner DONGFANG TURBINE CO LTD
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