Polymer and composition
View Patent ↗The present invention relates to a polyester resin obtained by reaction in a process (I) between the following components A to E to obtain a polyester P (the polyester comprising an alkyd resin and/or a saturated polyester resin), where (A) Component A (also referred to herein as the Imide and/or Imide Component) comprises one or more cyclic imides of Formula (1); where R′ represents a divalent optionally substituted saturated C 1-30 organo moiety; and R represents H or a monovalent optionally substituted saturated C 1-30 organo moiety; (A′) Optional Component A′ comprises saturated dicarboxylic acid and/or saturated hydroxyacid and that is not optional in case component A does not comprise a dicarboxylic acid or a hydroxyacid; 1(B) Component B (also referred to herein as the Polyol and/or Polyol Component) comprises at least one saturated polyhydric alcohol; (C) Optional Component C (also referred to herein as the Rosin and/or Rosin Component) comprises naturally occurring rosin, the rosin comprising from 40 to 80 parts per hundred by weight of rosin of an unsaturated mono carboxylic acid comprising at least one C 5-25 cyclohydrocarbo moiety capable of undergoing a Diels Alder or Ene reaction; (D) Optional Component D (also referred to herein as the Fatty Acid and/or Fatty Acid Component) comprises at least one linear C 2-60 hydrocarbo carboxylic acid optionally comprising at least two linoleically unsaturated double bonds; 2(E) Optional Component E (also referred to as the Other Component E) which may comprise at least one monofunctional or polyfunctional monomer other than any of Components A to D.
1. A polyester resin comprising an alkyd resin and/or a saturated polyester resin, wherein said polyester resin is obtained by reacting the following components A to E in a process (I):
(A) Component A comprises one or more cyclic imides of Formula 1;
wherein R′ represents a divalent optionally substituted saturated aliphatic C1-30 organo moiety; and
R represents H or a monovalent optionally substituted saturated C1-30 organo moiety;
(A′) Component A′ comprises a saturated dicarboxylic acid and/or a saturated hydroxy acid, wherein component A′ is optional only if component A comprises a dicarboxylic acid or a hydroxy acid;
(B) Component B comprises at least one saturated polyhydric alcohol;
(C) Optional Component C comprises naturally occurring rosin, the rosin comprising from 40 to 80 parts per hundred by weight of rosin of an unsaturated mono carboxylic acid comprising at least one C15-25 cyclohydrocarbo moiety capable of undergoing a Diels Alder or Ene reaction;
(D) Optional Component D comprises at least one linear C12-60 hydrocarbo carboxylic acid optionally comprising at least two linoleically unsaturated double bonds;
(E) Optional Component E other than any of Components A to D, wherein Component E is selected from the group consisting of monocarboxylic acids, amines, isocyanates, (poly)ethers, (poly)siloxanes (poly)amides and (poly)acrylates.
2. The polyester resin according to claim 1 , wherein R represents a monovalent optionally substituted saturated C 1-30 organo moiety.
3. The polyester resin according to claim 1 , wherein R represents a monovalent substituted saturated C 1-30 organo moiety.
4. The polyester resin according to claim 1 , wherein R′ represents a divalent substituted aliphatic saturated C 1-30 organo moiety and R represents a monovalent optionally substituted saturated C 1-30 organo moiety.
5. The polyester resin according to claim 1 , wherein R′ represents a divalent aliphatic substituted saturated C 1-30 organo moiety and R represents a monovalent substituted saturated C 1-30 organo moiety.
6. The polyester resin according to claim 1 , wherein R′ represents a divalent substituted aliphatic saturated C 1-20 hydrocarbo, and R represents a substituted saturated C 1-20 hydrocarbo.
7. The polyester resin according to claim 1 , wherein R′ represents an aliphatic saturated C 1-6 hydrocarbylene substituted by one or more imido, carboxy and/or hydroxyl, and R represents a saturated C 1-6 hydrocarbyl substituted by one or more imido, phenyl, carboxy and/or hydroxy.
8. The polyester resin according to claim 1 , wherein the polyester resin is an alkyd resin and wherein Component D is not optional and is present in an amount of at least 20% by weight of the total amount of Components A to E.
9. The polyester resin according to claim 1 , wherein the polyester resin is a saturated polyester resin and wherein the Component C and the Component D are absent.
10. The polyester resin according to claim 1 , wherein the cyclic imides of Formula 1 are represented by one or more citric imide derivatives of Formula 2:
and/or
one more succinimide derivatives of Formula 3:
wherein R in Formulae 2 and/or 3 independently represents H or a monovalent optionally substituted saturated C1-30 organo moiety.
11. The polyester resin according to claim 1 , wherein
the cyclic imides of Formula 1 are represented by one or more citric imide derivatives of Formula 2:
wherein R in Formula 2 independently represents H or a monovalent optionally substituted saturated C1-30 organo moiety.
12. The polyester resin according to claim 1 , wherein the cyclic imides of Formula 1 are selected from the group consisting of:
13. The polyester resin according to claim 1 , wherein the cyclic imides of Formula 1 are selected from the group consisting of:
14. The polyester resin according to claim 1 , wherein the Component A is present in an amount of from 1 to 90% by weight of the total amount of Components A to E and such that the amount of A to E totals 100%.
15. The polyester resin according to claim 1 , wherein the Component B is present in an amount of from 1 to 40% by weight of the total amount of Components A to E and such that the amount of A to E totals 100%.
16. The polyester resin according to claim 1 , wherein at least 20% by weight of the total amount of Components A to E comprise biorenewable material.
17. An emulsion comprising a polyester resin as claimed in claim 1 dispersed in an aqueous medium.
18. A coating composition comprising an emulsion as claimed in claim 17 .
19. A coating composition comprising a polyester resin as claimed in claim 1 .
20. The coating composition according to claim 19 , wherein the coating composition is a powder coating composition.
21. A coating obtained from a coating composition as claimed in claim 19 .
22. A method of preparing a coated article or a coated substrate comprising the step of coating an article or a substrate with a coating composition as claimed in claim 19 .
23. The method according to claim 22 , wherein the method further comprises the step of curing the coating composition.
24. An article or a substrate comprising a coating composition as claimed in claim 19 .
25. An article or a substrate having coated and cured thereon a coating composition as claimed in claim 19 .