Hyperbranched polyesters in printing inks

Patent metadata

Field	Value
Publication number	US-9834691-B2
Application number	US-201214009160-A
Country	US
Kind code	B2
Filing date	Apr 13, 2012
Priority date	Apr 15, 2011
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

The invention relates to multilayer materials for producing packaging comprising at least two films and also a layer which is printed with a packaging printing ink, said packaging printing ink comprising a certain hyperbranched polyester containing functional groups. The invention further relates to a packaging printing ink which comprises a certain hyperbranched polyester containing functional groups, and to the use of said printing ink for producing multilayer materials.

First claim

The invention claimed is:

1. A multilayer material comprising:
a first film comprising a polymeric material;
at least one print layer comprising a packaging printing ink; and
a second film;
wherein:
the packaging printing ink comprises 5 wt % to 35 wt % of a binder, based on the sum of all constituents in the packaging printing ink, wherein the binder comprises a first binder and a second binder;
the first binder comprises at least one hyperbranched polyester containing functional groups selected from the group consisting of OH, COOH and COOR groups, wherein R comprises groups having from 1 to 60 carbon atoms and optionally may also contain heteroatoms or further substituents;
the hyperbranched polyester comprises the polymerization product of:
 at least one acid selected from the group consisting of 1,2-cyclohexane dicarboxylic acid, 1,3-cyclohexane dicarboxylic acid, and 1,4-cyclohexane dicarboxylic acid or anhydrides thereof; and
 at least one at least trivalent aliphatic alcohol selected from the group consisting of trimethylolpropane, glycerol, and pentaerythritol;
wherein:
 the at least trivalent aliphatic alcohol hydroxyl groups to the acid carboxyl groups have a ratio of 2:1 to 1:2; and
 the hyperbranched polyester has a number average molecular weight of 300 g/mol to 10,000 g/mol, a weight average molecular weight to number average molecular weight ratio of about 1.3:1 to 5:1, and a glass transition temperature of from 30° C. to 50° C.;

the second binder comprises nitrocellulose; and
a weight ratio of the hyperbranched polyester to the total amount of all the binders is greater than 50% by weight and less than 80% by weight, and wherein the package printing ink further comprises about 40% by weight to about 80% by weight of at least one solvent.

2. The multilayer material of claim 1 , wherein the first film is selected from the group consisting of polyethylene, polypropylene, polystyrene, polyester and polyamide.

3. The multilayer material of claim 1 , wherein the second film is selected from the group consisting of polyethylene, polypropylene, polystyrene, polyester, polyamide and aluminum.

4. The multilayer material of claim 1 , wherein the at least one acid is 1,2-cyclohexane dicarboxylic acid or 1,2-cyclohexane dicarboxylic acid anhydride.

5. The multilayer material of claim 1 , wherein the trivalent aliphatic alcohol is trimethylolpropane.

6. A printing ink comprising:
5 wt % to 35 wt % of a binder, based on the sum of all constituents in the printing ink, wherein the binder comprises a first binder and a second binder; and
at least one solvent;
wherein:
the first binder comprises at least one hyperbranched polyester, the hyperbranched polyester comprises the polymerization product of:
at least one acid selected from the group consisting of 1,2-cyclohexane dicarboxylic acid, 1,3-cyclohexane dicarboxylic acid, and 1,4-cyclohexane dicarboxylic acid or anhydrides thereof; and
at least one at least trivalent aliphatic alcohol selected from the group consisting of trimethylolpropane, glycerol, and pentaerythritol;
wherein:
the at least trivalent aliphatic alcohol hydroxyl groups to the acid carboxyl groups have a ratio of 2:1 to 1:2; and
the hyperbranched polyester has a number average molecular weight of 300 g/mol to p10,000 g/mol, a weight average molecular weight to number average molecular weight ratio of about 1.3:1 to 5:1, and a glass transition temperature of from 30° C. to 50° C.;

the second binder comprises nitrocellulose; and
a weight ratio of the hyperbranched polyester to a total amount of all the binders is greater than 50% by weight and less than 80% by weight, and wherein the printing ink comprises about 40% by weight to about 80% by weight of the at least one solvent.

7. The printing ink of claim 6 further comprising at least one colorant.

8. The printing ink of claim 7 , wherein the colorant comprises titanium dioxide, iron oxide, an interference pigment, carbon black, a metal powder, an azo pigment, a phthalocyanine pigment, an isoindoline pigment.

9. The printing in of claim 7 , wherein the colorant comprises phthalocyanine blue 15:4, phthalocyanine green 7, green 36, yellow 12, yellow 14, red 57:1, or red 52:1.

10. The printing ink of claim 6 further comprising an additive selected from the group consisting of calcium carbonate, aluminum oxide hydrate, aluminum silicate, magnesium silicate, a wax, a fatty acid amide, a plasticizer, a dispersing agent, and an adhesion promoter.

11. The printing ink of claim 10 , wherein the additive is present in the ink from 0 wt % to 20 wt %.

12. The printing ink of claim 6 , wherein the at least one acid is 1,2-cyclohexane dicarboxylic acid or 1,2-cyclohexane dicarboxylic acid anhydride.

13. The printing ink of claim 6 , wherein the trivalent aliphatic alcohol is trimethylolpropane.

Assignees

• Bruchmann Bernd
• Haberecht Monika
• Hsu Chien Lu
• Campbell John
• Taylor James W
• Basf Se

Inventors

• Bruchmann Bernd
• Haberecht Monika
• Hsu Chien Lu
• Campbell John
• Taylor James W

Classifications

• Y10T428/24802

  Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] · CPC title

• Y10T428/24851

  Intermediate layer is discontinuous or differential · CPC title

• C08K5/23

  Azo-compounds · CPC title

• C08G63/16

  Dicarboxylic acids and dihydroxy compounds · CPC title

• C08K2003/2265

  of iron · CPC title