EP 4337633 A1 20240320 - UNSATURATED ESTERS CONTAINING AN ADDITIVE FOR REDUCING AND STABILISING THE YELLOWNESS INDEX VALUE
Title (en)
UNSATURATED ESTERS CONTAINING AN ADDITIVE FOR REDUCING AND STABILISING THE YELLOWNESS INDEX VALUE
Title (de)
UNGESÄTTIGTE ESTER, ENTHALTEND EIN ADDITIV ZUR REDUKTION UND STABILISIERUNG DES GELBWERTES
Title (fr)
ESTERS INSATURÉS CONTENANT UN ADDITIF POUR RÉDUIRE ET STABILISER LA VALEUR D'INDICE DE JAUNISSEMENT
Publication
Application
Priority
- EP 21172931 A 20210510
- EP 2022061442 W 20220429
Abstract (en)
[origin: WO2022238144A1] The present invention relates to a new method for reducing the yellowness index value of alkyl (meth)acrylates, in particular MMA, and of polymers which were produced from these alkyl (meth)acrylates. The new method develops this effect even after the monomers have been stored for a longer period. The method relates to the addition of specific aldehydes into the monomer composition. This can take place irrespective of the particular process for producing the alkyl (meth)acrylates, and is thus simple and cost effective to achieve. Furthermore, the corresponding monomer compositions form part of the present invention.
IPC 8 full level
C07C 67/62 (2006.01); C07C 69/54 (2006.01)
CPC (source: EP KR)
C07C 67/62 (2013.01 - EP KR); C07C 69/54 (2013.01 - KR)
C-Set (source: EP)
Designated contracting state (EPC)
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 state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022238144 A1 20221117; BR 112023023281 A2 20240123; CN 117279885 A 20231222; EP 4337633 A1 20240320; JP 2024518080 A 20240424; KR 20240006654 A 20240115; TW 202311223 A 20230316
DOCDB simple family (application)
EP 2022061442 W 20220429; BR 112023023281 A 20220429; CN 202280033961 A 20220429; EP 22727014 A 20220429; JP 2023569760 A 20220429; KR 20237042646 A 20220429; TW 111116947 A 20220505