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(11)

EP 3 331 831 A1

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(43) Date of publication: 13.06.2018 Bulletin 2018/24 (21) Application number: 16736966.9 (22) Date of filing: 22.06.2016

(51) International Patent Classification (IPC):  C03B 35/20(2006.01) C03B 29/08(2006.01) C03B 23/025(2006.01) (86) International application number: PCT/US2016/038738 (87) International publication number: WO 2017/023436 (09.02.2017 Gazette 2017/06)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 06.08.2015 US 201514819849 (71) Applicant: PPG Industries Ohio, Inc. Cleveland, OH 44111 (US)	(72) Inventors: JIAO, Yu Blawnox, Pennsylvania 15238 (US) SCHRIER, Russell W. Oakmont, Pennsylvania 15139 (US) YU, Chao Horseheads, New York 14845 (US) (74) Representative: f & e patent  Braunsberger Feld 29 51429 Bergisch Gladbach 51429 Bergisch Gladbach (DE)