TCD based hydrophilic polyurethane dispersions

• US 8,791,200 B2
• Filed: 08/22/2009
• Issued: 07/29/2014
• Est. Priority Date: 09/04/2008
• Status: Expired due to Fees

• Current Assignee: Bayer Materialscience AG (Covestro AG)
• Original Assignee: Bayer Materialscience AG (Covestro AG)
• Inventors: Wamprecht, Christian, Kcher, Jrgen
• Primary Examiner(s): Leonard, Michael L
• Application Number:
  US13/062,267
• Publication Number:
  US 20120083537A1
• Time in Patent Office: 1,802 Days
• Field of Search: 524/589, 524/590, 524/591, 524/839, 524/840, 528/49, 528/64, 528/61, 528/59, 528/85
• US Class Current: 524/591
• CPC Class Codes: A61L 29/085 Macromolecular materials
• CPC Class Codes: A61L 31/10 Macromolecular materials
• CPC Class Codes: A61L 33/068 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds A61L33/062 takes precedence
• CPC Class Codes: C08G 18/12 using two or more compounds having active hydrogen in the first polymerisation step
• CPC Class Codes: C08G 18/282 Alkanols, cycloalkanols or arylalkanols including terpenealcohols
• CPC Class Codes: C08G 18/283 Compounds containing ether groups, e.g. oxyalkylated monohydroxy compounds
• CPC Class Codes: C08G 18/3234 cycloaliphatic
• CPC Class Codes: C08G 18/44 Polycarbonates
• CPC Class Codes: C08G 18/664 with compounds of group C08G18/3203
• CPC Class Codes: C08G 18/758 containing two or more cycloaliphatic rings
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 2375/08 from polyethers
• CPC Class Codes: C08J 3/07 from polymer solutions
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: C09D 175/06 from polyesters

Abstract

The present invention relates to a polyurethaneurea solution having a polyurethaneurea having a structural unit of the formula (I)

and terminated with at least one copolymer unit of the group consisting of a polyethylene oxide, a polypropylene oxide, and mixtures thereof.

Claims

1. A polyurethaneurea solution comprising a polyurethaneurea having a structural unit of the formula (I)

2. The polyurethaneurea solution according to claim 1, wherein the polyurethaneurea is free from ionic or ionogenic groups.

3. The polyurethaneurea solution according to claim 1, wherein the copolymer unit of polyethylene oxide and polypropylene oxide that is used for termination is based on a monohydroxy-functional mixed polyalkylene oxide polyether comprising at least 40 mol % ethylene oxide units and not more than 60 mol % propylene oxide units based on the total fraction of alkylene oxide units having a number-average molecular weight from 500 g/mol to 5,000 g/mol.

4. The polyurethaneurea solution according to claim 1, wherein the polyurethaneurea has a number-average molecular weight from 5,000 to 100,000 g/mol as measured in dimethylacetamide at 30°

C.

5. The polyurethaneurea solution according to claim 1, wherein the polyurethaneurea solution further comprises a solvent selected from the group consisting of dimethylformamide, N-methylacetamide, tetramethylurea, N-methylpyrrolidone, toluene, linear and cyclic esters, ethers, ketones, alcohols, and mixtures thereof.

6. The polyurethaneurea solution according to claim 5, wherein the solvent is selected from the group consisting of mixtures of toluene and ethanol, n-propanol, isopropanol, 1-methoxy-2-propanol, and mixtures thereof.

7. The polyurethaneurea solution according to claim 1, wherein the polyurethaneurea solution further comprises a pharmacological active compound.

8. A polyurethaneurea obtained from the polyurethaneurea solution according to claim 1.

9. A coating obtained from the polyurethaneurea according to claim 8.

10. A substrate coated with the coating according to claim 9.

11. The polyurethaneurea solution according to claim 1, wherein the polyurethaneurea has a number-average molecular weight from 5,000 to 100,000 g/mol as measured in dimethylacetamide at 30°

C., and wherein the copolymer unit of polyethylene oxide and polypropylene oxide that is used for termination is based on a monohydroxy-functional mixed polyalkylene oxide polyether comprising at least 40 mol % ethylene oxide units and not more than 60 mol % propylene oxide units based on the total fraction of alkylene oxide units having a number-average molecular weight from 500 g/mol to 5,000 g/mol.

12. The polyurethaneurea solution according to claim 11, wherein the polyurethaneurea solution further comprises

a. a solvent selected from the group consisting of mixtures of toluene and ethanol, n-propanol, isopropanol, 1-methoxy-2-propanol, and mixtures thereof, and

b. a pharmacological active compound.