Patent ID: 7642320
Filing Date: 2010-01-05
Classification: C08G,C08L

Abstract:
1. A process for the preparation of a compound of formula (I) where additive moiety is selected from the group consisting of hindered phenolic antioxidant, hydroxyphenylbenzotriazole, hydroxyphenyltriazine, hydroxybenzophenone and hindered amine light stabilizer moieties, x and y are each independently greater than or equal to 1, z is 1 to 5, and L is independently of each other a direct bond or a chemical linking group, with the proviso that the self-condensation of 3,5-dihydroxybenzoic acid and 4-hydroxyphenylmethyl carbinol benzotriazole is excluded, which process comprises reacting a carboxy-functional additive compound with poly(ethylene glycol)monomethyl ether and dimethylolpropionic acid, where the carboxy-functional additive compound contains an additive moiety selected from the group consisting of hindered phenolic antioxidant, hydroxyphenylbenzotriazole, hydroxyphenyltriazine, hydroxybenzophenone and hindered amine light stabilizer moieties.