Patent ID: 11884837
Assignee: BASF COATINGS GMBH
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC B  C

Claim 11:
12. A scratch and mar resistant coated substrate obtained by drying and curing the wet-coated substrate of claim 7, comprising:
optionally, a dried and cured primer coating on the substrate;
a dried and cured basecoat; and
a dried and cured clearcoat, the dried and cured clearcoat comprising:
a crosslinked resin reaction product of an epoxy resin and a carboxylic acid resin, wherein the epoxy resin is an acrylic resin having an epoxy group in a side chain, and wherein the carboxylic acid resin includes carboxylic acid groups;
wherein the crosslinked resin comprises side chain units of silanyl hydroxy ester groups obtained by reaction of a carboxyl group of the carboxylic acid groups or the epoxy group of the epoxy resin with a compound of formula (I):

[(ER)x(R′O)y(HO)z(R″)t(SiO(4-x-y-z-t))]m  (I)

wherein
ER is an alkyl group substituted with an epoxide group or a cycloalkyl group substituted with an epoxide group,
R′ is an alkyl group of 1 to 6 carbon atoms,
R″ is an alkyl group of 1 to 20 carbon atoms which may be linear, branched or cyclic,
x is a number from 0 to 2,
y is a number from 0 to 4,
z is a number from 0 to 3,
t is a number from 0 to 2,
at least one of x and y is greater than 0,
x+y+z+t=4, and
m is =1, and/or oligomer or polymer compounds of the compound of formula (I), wherein partial hydrolysis and condensation provides structures containing epoxy side chains (ER), said structures containing up to 5000 monomeric units m; and
wherein the dried and cured clearcoat further comprises crosslinking silicate groups.