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Production method of ethylene-vinyl acetate copolymer resin for solar cell sealing sheet and resin produced by the production method

A vinyl acetate and manufacturing method technology, applied in photovoltaic power generation, etc., can solve the problems of low economy, weak adhesion, peeling, etc., and achieve the effects of low moisture permeability, excellent long-term durability, and high resistance

Active Publication Date: 2019-04-30
HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In connection with this, Na ionomers, Mg ionomers, and the back protection sheet (so-called back sheet) are weakly bonded, and peeling is likely to occur, which is basically expensive and economical compared with existing EVA resins. Disadvantages of low sex

Method used

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  • Production method of ethylene-vinyl acetate copolymer resin for solar cell sealing sheet and resin produced by the production method
  • Production method of ethylene-vinyl acetate copolymer resin for solar cell sealing sheet and resin produced by the production method
  • Production method of ethylene-vinyl acetate copolymer resin for solar cell sealing sheet and resin produced by the production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 76% by weight of ethylene monomer and 24% by weight of vinyl acetate monomer were injected into the tubular reactor as free radical generation initiators to make tert-butyl peroxide 2-ethylhexanoate (TBPO), pivalic acid peroxide The weight ratio of the mixture of tert-butyl ester (TBPV), tert-butyl peroxyneodecanoate (TBND), and tert-butyl peroxy-3,5,5-trimethylhexanoate (TBPIN) is 1:0.2:0.4 : 0.1, 1800ppm compared with ethylene and vinyl acetate monomers, sent to the tubular reactor (tubularreactor) using a high pressure pump, at a polymerization pressure of 2650kg / cm 2 , The EVA resin was produced under the polymerization conditions of a polymerization temperature of 240° C. and a polymerization time of 5 minutes.

Embodiment 2

[0049] 76% by weight of ethylene monomer and 24% by weight of vinyl acetate monomer are injected into the tubular reactor, as a catalyst for generating free radicals, tert-butyl peroxide 2-ethylhexanoate (TBPO), pivalic acid peroxide The weight ratio of the mixture of tert-butyl ester (TBPV), tert-butyl peroxyneodecanoate (TBND), and tert-butyl peroxy-3,5,5-trimethylhexanoate (TBPIN) is 1:0.4:0.6 : 0.1, 1500ppm compared with ethylene and vinyl acetate monomer, using high pressure pump to send to tubular reactor (tubular reactor), at a polymerization pressure of 2650kg / cm 2 , The EVA resin was produced under the polymerization conditions of a polymerization temperature of 200° C. and a polymerization time of 5 minutes.

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Abstract

The present invention provides a manufacturing method of an ethylene-vinyl acetate copolymer resin used for a solar cell sealing sheet and the resin manufactured thereby. The manufacturing method of the ethylene-vinyl acetate copolymer resin comprises the following steps of putting 72-80% vinyl monomers and 20-28% vinyl acetate monomers in a tubular reactor, after adding an oxide polymerization initiator, carrying out the polymerization for 2-10 minutes under the pressure of 2500-3000 kg / cm<2> at 190-300 DEG C, wherein the oxide polymerization initiator contains a mixture mixed with (A) an ethyl hexyl hexanoate compound with an alkyl group having 4-5 carbon atoms or a peroxide trimethylhexanoic acid alkyl ester compound with the alkyl group having 4-5 carbon atoms, B a terpentine peroxide alkyl ester compounds with the alkyl group having 4-5 carbon atoms and C a peroxidating neodecanoic acid alkyl ester compounds with the alkyl group having 4-5 carbon atoms within a weight proportion range of A:B:C=50-80:10-20:10-30.

Description

technical field [0001] The present invention relates to a method for producing ethylene-vinyl acetate copolymer (EVA) resin, and the EVA resin produced by the method, which is used in the production of ethylene-vinyl acetate copolymer used in the production of solar cell sealing sheets in a tubular reactor. When using (EVA) resin, the type and content of the initiator, the weight ratio of the initiator mixture and the polymerization conditions can be limited so as to reduce the vinyl acetate content in the resin, maintain the solar light transmittance and transparency, and reduce the amount of acetic acid produced. Background technique [0002] Solar cell modules used in solar power generation usually use ethylene-vinyl acetate copolymer (EVA) resin sheets on both sides to protect the cells, and additionally laminate a transparent glass substrate on the sunlight incident side and laminate on the opposite side A sheet excellent in gas barrier properties and weather resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/02C08F218/08C08F4/38
CPCY02E10/50
Inventor 韩在爀张喜贞朴智溶崔昶铉
Owner HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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