Polyisocyanate mixture based on 1,5-diisocyanatopentane

Patent metadata

Field	Value
Publication number	US-10428174-B2
Application number	US-201615567720-A
Country	US
Kind code	B2
Filing date	Apr 18, 2016
Priority date	Apr 21, 2015
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

The invention relates to a polyisocyanate mixture containing at least one polyisocyanate based on 1,5-diisocyanatopentane and at least one organic solvent, said organic solvent being inert with respect to isocyanate groups and the polyisocyanate mixture has a solid body content of ≥35 and ≤65 wt. %. The invention also relates to a two-component system, to a method for producing a coating, to the thus obtained coatings and to a composite consisting of the coating and a substrate.

First claim

The invention claimed is:

1. A polyisocyanate mixture comprising at least one polyisocyanate based on 1,5-diisocyanatopentane and at least one organic solvent, the organic solvent being inert toward isocyanate groups, and the polyisocyanate mixture having a solids content of a ≥35 and ≤65 wt %.

2. The polyisocyanate mixture of claim 1 , the polyisocyanate having a degree of polymerization of ≥20%.

3. The polyisocyanate mixture of claim 2 , the polyisocyanate having a degree of polymerization of ≥30%.

4. The polyisocyanate mixture of claim 1 , the organic solvent being selected from the group of aromatic or aliphatic alkanes, alkenes, esters, ethers, nitriles, ketones or a mixture thereof.

5. The polyisocyanate mixture of claim 1 , the polyisocyanate mixture having a viscosity at 23° C. of ≥3 and ≤500 mPa*s.

6. The polyisocyanate mixture of claim 5 , the polyisocyanate mixture having a viscosity at 23° C. of ≥4 and ≤400 mPa*s.

7. The polyisocyanate mixture of claim 1 , the polyisocyanate mixture prepared using 1,5-diisocyanatopentane as the sole diisocyanate, and having an average NCO functionality of 2 to 9.

8. The polyisocyanate mixture of claim 7 , the polyisocyanate mixture prepared using 1,5-diisocyanatopentane as the sole diisocyanate, and having an average NCO functionality of 2.5 to 6.

9. The polyisocyanate mixture of claim 1 , the polyisocyanate mixture prepared using 1,5-diisocyanatopentane as the sole diisocyanate, and having an isocyanate group content of 15.0 to 27.25 wt %, based on the total weight of polyisocyanate in the polyisocyanate mixture.

10. The polyisocyanate mixture of claim 9 , the polyisocyanate mixture prepared using 1,5-diisocyanatopentane as the sole diisocyanate, and having an isocyanate group content of 19.0 to 23.0 wt %, based on the total weight of polyisocyanate in the polyisocyanate mixture.

11. The polyisocyanate mixture of claim 1 , the polyisocyanate mixture prepared using 1,5-diisocyanatopentane as the sole diisocyanate, and having a monomeric 1,5-diisocyanatopentane content of less than 1.0 wt %.

12. The polyisocyanate mixture of claim 11 , the polyisocyanate mixture prepared using 1,5-diisocyanatopentane as the sole diisocyanate, and having a monomeric 1,5-diisocyanatopentane content of less than 0.5 wt %.

13. The polyisocyanate mixture of claim 12 , the polyisocyanate mixture prepared using 1,5-diisocyanatopentane as the sole diisocyanate, and having a monomeric 1,5-diisocyanatopentane content of less than 0.3 wt %.

14. A two-component system comprising a component I), comprising the polyisocyanate mixture of claim 1 and also, optionally, further auxiliaries and additives, and a component II), comprising at least one binder that is reactive toward isocyanate groups, and also, optionally, further auxiliaries and additives.

15. The two-component system of claim 14 , the binder that is reactive toward isocyanate groups comprising at least one amino-, thio- and/or hydroxy-functional compound.

16. The two-component system of claim 15 , wherein the binder that is reactive toward isocyanate groups comprises at least one hydroxy-functional compound.

17. A method for producing a coating, wherein the two-component system of claim 14 is mixed and is cured optionally with heating.

18. A coating produced by the method of claim 17 .

19. An assembly comprising the coating of claim 18 and a substrate having a surface of metal, wood and/or plastic.

20. A method of producing a coating comprising depositing the two-component system of claim 14 on a substrate.

Assignees

• Covestro Deutschland Ag

Inventors

• Hecking Andreas
• Eggert Christoph
• Weikard Jan
• Behnken Gesa

Classifications

• C08G18/022 Primary

  the polymeric products containing isocyanurate groups · CPC title

• C08G18/622

  Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids · CPC title

• C08G18/792

  formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates · CPC title

• C08G18/791

  containing isocyanurate groups · CPC title

• C09D175/04

  Polyurethanes · CPC title