Polyisocyanate mixture based on 1,5-diisocyanatopentane

Patent metadata

Field	Value
Publication number	US-2018201719-A1
Application number	US-201615567720-A
Country	US
Kind code	A1
Filing date	Apr 18, 2016
Priority date	Apr 21, 2015
Publication date	Jul 19, 2018
Grant date	—

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

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 a ≥20%.

3 . 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.

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

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

6 . The polyisocyanate mixture of claim 1 , the polyisocyanate mixture prepared using 1,5-diisocyanatopentane as 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.

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

8 . 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.

9 . The two-component system of claim 8 , the binder that is reactive toward isocyanate groups comprising at least one amino-, thio- and/or hydroxy-functional compound.

10 . A method for producing a coating, wherein a two-component system of claim 8 is mixed and is cured optionally with heating.

11 . A coating produced by the method of claim 10 .

12 . (canceled)

13 . An assembly comprising the coating of claim 11 and a substrate having a surface of metal, wood and/or plastic.

14 . A method of producing a coating comprising depositing the two-component system of claim 8 on a substrate.

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

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

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

18 . The polyisocyanate mixture of claim 6 , 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.

19 . The polyisocyanate mixture of claim 7 , 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 %.

20 . The polyisocyanate mixture of claim 19 , 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 %.

21 . The two-component system of claim 9 , wherein the binder that is reactive toward isocyanate groups comprises at least one hydroxy-functional compound.

Assignees

• Covestro Deutschland Ag

Inventors

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

Classifications

• C09D175/04

  Polyurethanes · CPC title

• C08G18/022 Primary

  the polymeric products containing isocyanurate groups · CPC title

• C08G18/7875

  containing heterocyclic rings having at least one nitrogen atom in the ring · CPC title

• C09D7/63

  organic · CPC title

• C08G18/73 Primary

  acyclic · CPC title