Patent ID: 11920058
Assignee: ALLNEX NETHERLANDS B.V.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 7:
8. The powder coating composition according to claim 1, wherein at least one of crosslinkable components A or B or a hybrid A/Bis a polymer, wherein the hybrid A/Bis a molecule comprising the crosslinkable components A and B, wherein the polymer is selected from the group consisting of acrylic, polyester, polyester amide, and polyester-urethane polymers, which polymer
a) has a number average molecular weight Mn, as determined with GPC, of at least 450 gr/mole,
b) has a weight average molecular weight Mw, as determined with GPC, of at most 20000 gr/mole,
c) has a molecular weight distribution Mw/Mn below 4,
d) has an equivalent weight EQW in C—H or C═C of at least 150 gr/mole and at most 2500 gr/mole and a number average functionality of reactive groups C—H or C═C between 1-25, C—H groups per molecule,
e) has a melt viscosity at a temperature in the range between 100 and 140° C. less than 60 Pas,
f) comprises amide, urea or urethane bonds and/or comprises high Tg monomers selected from the group consisting of 1,4-dimethylol cyclohexane (CHDM), tricyclodecanedimethanol (TCD diol), isosorbide, penta-spiroglycol or hydrogenated bisphenol A, and tetramethyl-cyclobutanediol, or
g) has a Tg above 25° C. as the midpoint value determined by DSC at a heating rate of 10° C./min or is a crystalline polymer with a melting temperature between 40° C. and 150 as determined by DSC at a heating rate of 10° C./min.