Use of block copolymers in coatings
The present invention relates to the use of block copolymers based on OH-, COOH- or amino-functionalized polyolefins and polyesters as binders in coating compositions, preferably paints, especially for improving the adhesion of coatings, especially coil coatings on metals, and to coating compositions comprising the block copolymers mentioned.
1. A coating composition formed from OH-, COOH- or amino-functionalized polymers and polyesters as binders in coating compositions, wherein the block copolymers used in accordance with the invention that are based on OH-, COOH- or amino-functionalized polymers, polyesters are B(A) x block systems with A=polyester, with B=OH-, COOH- or amino-functionalized polymer and wherein x is from 1 to 5, and hydroxyl-terminated polybutadiene comprising 1,3-butadiene-derived monomer units
from 15 to 30 mol % of
from 50 to 70 mol % of
and
from 15 to 30 mol % of
wherein the sum total of the proportions of (II) and (III) in the entirety of the 1,3-butadiene-derived monomer units present in the polybutadiene is 40 to 90 mole percent, and wherein the entirety of the 1,3-butadiene-derived monomer units (I), (II) and (III) present in the polybutadiene represents a proportion of the entirety of the monomer units incorporated in the polymer and comprising the 1,3-butadiene-derived units and other units of at least 80 mole percent.
2. The coating composition according to claim 1 , wherein the block copolymers are based on polyesters formed from lactones and/or lactides, and wherein the entirety of the 1,3-butadiene-derived monomer units (I), (II) and (III) present in the polybutadiene represents a proportion of the entirety of the monomer units incorporated in the polymer and comprising the 1,3-butadiene-derived units and other units of at least 90 mole percent.
3. A coating composition comprising (a) block copolymers formed from OH-, COOH- or amino-functionalized polymers (block B) and polyesters (block A), and (b) a further OH-, COOH- or amino-functionalized component, wherein the OH-, COOH- or amino-functionalized polymers are selected from the group consisting of hydroxyl-terminated polybutadiene comprising 1,3-butadiene-derived monomer units
from 15 to 30 mol % of
from 50 to 70 mol % of
and
from 15 to 30 mol % of
wherein the sum total of the proportions of (II) and (III) in the entirety of the 1,3-butadiene-derived monomer units present in the polybutadiene is 40 to 90 mole percent, and wherein the entirety of the 1,3-butadiene-derived monomer units (I), (II) and (III) present in the polybutadiene represents a proportion of the entirety of the monomer units incorporated in the polymer and comprising the 1,3-butadiene-derived units and other units of at least 80 mole percent.
4. The coating composition according to claim 3 , wherein the coating composition is a paint for coil coatings on metals.
5. The coating composition according to claim 3 , wherein the coating composition comprise, as component (b), polyesters based on di- or polyols and di- or polycarboxylic acids or derivatives thereof, and wherein the entirety of the 1,3-butadiene-derived monomer units (I), (II) and (III) present in the polybutadiene represents a proportion of the entirety of the monomer units incorporated in the polymer and comprising the 1,3-butadiene-derived units and other units of at least 90 mole percent.
6. A composition comprising a substrate and a coating compositions according to claim 3 .
7. The composition according to claim 6 , wherein the substrates are oily substrates.
8. The composition comprising a substrate and a coating compositions according to claim 4 .
9. The composition comprising a substrate and a coating compositions according to claim 5 .
10. The coating composition according to claim 2 , wherein the block copolymers are based on polyesters formed from lactones and/or lactides.
11. The coating composition according to claim 4 , wherein the coating composition comprise, as component (b), polyesters based on di- or polyols and di- or polycarboxylic acids or derivatives thereof.
12. The coating composition according to claim 1 , wherein the entirety of the 1,3-butadiene-derived monomer units (I), (II) and (III) present in the polybutadiene represents a proportion of the entirety of the monomer units incorporated in the polymer and comprising the 1,3-butadiene-derived units and other units of at least 95 mole percent.
13. The coating composition according to claim 1 , wherein the entirety of the 1,3-butadiene-derived monomer units (I), (II) and (III) present in the polybutadiene represents a proportion of the entirety of the monomer units incorporated in the polymer and comprising the 1,3-butadiene-derived units and other units of 100 mole percent.
14. The coating composition according to claim 3 , wherein the entirety of the 1,3-butadiene-derived monomer units (I), (II) and (III) present in the polybutadiene represents a proportion of the entirety of the monomer units incorporated in the polymer and comprising the 1,3-butadiene-derived units and other units of at least 95 mole percent.
15. The coating composition according to claim 3 , wherein the entirety of the 1,3-butadiene-derived monomer units (I), (II) and (III) present in the polybutadiene represents a proportion of the entirety of the monomer units incorporated in the polymer and comprising the 1,3-butadiene-derived units and other units of 100 mole percent.