(19)

(11)

EP 3 969 503 A2

(12)

(88) Date of publication A3: 17.12.2020 (43) Date of publication: 23.03.2022 Bulletin 2022/12 (21) Application number: 20758322.0 (22) Date of filing: 14.05.2020

(51) International Patent Classification (IPC):  C08H 1/06(2006.01) C14C 3/00(2006.01) C08L 89/06(2006.01) (52) Cooperative Patent Classification (CPC): C08H 1/06; C08L 89/06; C14C 3/00; C14C 1/04; C14C 3/06 (86) International application number: PCT/IB2020/054567 (87) International publication number: WO 2020/230072 (19.11.2020 Gazette 2020/47)

(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: 16.05.2019 IT 201900006926 (71) Applicant: Sciarada Industria Conciaria S.p.A. 56022 Castelfranco di Sotto (IT)	(72) Inventor: BERTOLUTTI, Claudio 56028 San Miniato (IT) (74) Representative: Masala, Gian Tomaso et al Notarbartolo & Gervasi S.p.A. Viale Achille Papa, 30 20149 Milano 20149 Milano (IT)