公开(公告)号：US20240043611A1

公开(公告)日：2024-02-08

申请号：US18265991

申请日：2021-12-15

Applicant: BASF SE

Inventor： Florian Ludwig GEYER ,  Sedastian ROLLER ,  Elena WOLF ,  Steffen MADER ,  Sylvester GROESSL

IPC: C08G63/685 ,  C09D175/06 ,  C08G18/24 ,  C08G18/79 ,  C08G18/42

CPC classification number: C08G63/6854 ,  C09D175/06 ,  C08G18/246 ,  C08G18/792 ,  C08G18/42

Abstract: The present invention relates to polyester polyols comprising units derived from

a) at least one component (A) carrying at least one COOH group or a derivative thereof, wherein component (A) comprises

(i) at least one compound carrying two COOH groups or derivatives thereof (A1), and


b) at least one component (B) carrying at least one OH group and no COOH group, wherein component (B) comprises

(ii) at least one compound or oligomer carrying at least three OH groups and no COOH group (B1),
(iii) at least one compound carrying two OH groups (B2) selected from the group consisting of








B2a and B2c,



wherein n and m are independently from each other 0 or 1, and R1 and R2 are independently selected from the group consisting of H, CH3 and CH2CH3, and
(iv) optionally at least one compound, oligomer or polymer carrying two OH groups and no COOH group, which is different from B2 (B3),


wherein the molar ratio of the OH groups of components B1 to the sum of OH groups of components B1, B2 and B3 is in the range of from 25 to 90%,
and to an organic solvent-based two-component coating composition comprising
a) a first component (K1) comprising (i) at least one polyester polyol of the present invention, and (ii) optionally at least one polymer carrying more than one OH group, which is different from the polyester polyol of the present invention, (D), and
b) a second component (K2) comprising (i) at least one compound, oligomer or polymer carrying more than one N═C═O group or blocked N═C═O group (F),
to substrates coated with the coating compositions, and to coating layers on a substrate formed from the coating compositions.