Title:
ETHYLENE VINYL ACETATE COPOLYMER RESIN FOR SOLAR CELL ENCAPSULANT SHEET, AND PRODUCTION PROCESS THEREFOR
Document Type and Number:
Japanese Patent JP2016125053
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a resin for solar cell encapsulant sheet that has a low heat shrinkage and is excellent in transparency, and to provide a production process therefor.SOLUTION: The production process comprises: a step of charging 67 to 76 wt.% ethylene monomer and 24 to 33 wt.% vinyl acetate monomer limitedly only to the front portion of a tubular reactor; a step of adding a peroxide-based initiator comprising a mixture in which one or more selected from a dialkyl peroxydicarbonate-based compound (A), an alkyl peroxy pivalate-based compound (B), an alkyl peroxy-ethylhexanoate-based compound (C), and (D) a dialkyl peroxide-based compound (D) in a weight ratio of (A):(B):(C):(D)=e:f:g:h such that e, f, g, and h are included within a range of 0 to 8.0, at a concentration of 50 to 3000 ppm; and followed by a step of polymerizing at 200 to 300°C under a pressure of 2500 to 3000 kg/cmfor 2 to 20 minutes.SELECTED DRAWING: None
Inventors:
HAN JAE HYUCK
JANG HEE JUNG
CHO JAE WHAN
PARK JI YONG
JANG HEE JUNG
CHO JAE WHAN
PARK JI YONG
Application Number:
JP2015188765A
Publication Date:
July 11, 2016
Filing Date:
September 25, 2015
Export Citation:
Assignee:
HANWHA TOTAL PETROCHEMICAL CO LTD
International Classes:
C08F2/00; C08F2/01; C08F4/38; C08F210/02; C08F218/08
Domestic Patent References:
| JP2001525462A | 2001-12-11 | |||
| JPH10130307A | 1998-05-19 | |||
| JPS4919710B1 | 1974-05-20 | |||
| JP2013159777A | 2013-08-19 | |||
| JP2014192280A | 2014-10-06 |
Foreign References:
| KR20120015551A | 2012-02-22 | |||
| WO2012140897A1 | 2012-10-18 |
Attorney, Agent or Firm:
Patent business corporation r&c