(19)

(11)

EP 4 041 777 A1

(12)

(43) Date of publication: 17.08.2022 Bulletin 2022/33 (21) Application number: 20761133.6 (22) Date of filing: 14.07.2020

(51) International Patent Classification (IPC):  C08B 15/02(2006.01) (52) Cooperative Patent Classification (CPC): C08B 15/02 (86) International application number: PCT/BG2020/000028 (87) International publication number: WO 2021/012023 (28.01.2021 Gazette 2021/04)

(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: KH MA MD TN (30) Priority: 25.07.2019 BG 11297119 (71) Applicant: Svilosa AD 5250 Svishtov (BG)	(72) Inventors: VALCHEV, Ivo Vladimirov 1113 Sofia (BG) DACHEV, Krassimir Banchev 1616 Sofia (BG) YAVOROV, Nikolay Asenov 1172 Sofia (BG) (74) Representative: Kosseva, Radislava Andreeva  Compl. Mladost-2, Bl.231, entr.8, ap.77 BG-1799 Sofia BG-1799 Sofia (BG)