Polyisocyanate mixture, coating composition, and coating film

Patent metadata

Field	Value
Publication number	US-11248084-B2
Application number	US-201716340288-A
Country	US
Kind code	B2
Filing date	Oct 13, 2017
Priority date	Oct 14, 2016
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

Provided is a polyisocyanate mixture including: a triisocyanate compound (A) represented by Formula (I); and polyisocyanate (B) obtained from at least one diisocyanate selected from the group consisting of aliphatic diisocyanate, alicyclic diisocyanate, and aromatic diisocyanate.(In Formula (1), a plurality of Y1's each independently represent a single bond or a divalent hydrocarbon group having 1 to 20 carbon atoms which may have an ester structure and/or an ether structure. A plurality of Y1's may be the same as or different from one another. R1 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 12 carbon atoms.)

First claim

The invention claimed is:

1. A polyisocyanate mixture comprising:
a triisocyanate compound (A) represented by Formula (I); and
polyisocyanate (B1) obtained by using a polyester polyol containing three or more hydroxyl groups as a raw material, the polyisocyanate (B1) having a number average molecular weight of 850 to 5000, which is obtained from at least one diisocyanate selected from the group consisting of aliphatic diisocyanates;
wherein Formula (I) is

in which each Y 1 independently represents a single bond or a divalent hydrocarbon group having 1 to 20 carbon atoms which may have an ester structure and/or an ether structure, each Y 1 may be the same as or different from one another, and R 1 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 12 carbon atoms.

2. The polyisocyanate mixture according to claim 1 ,
wherein a content of the triisocyanate compound (A) is in a range of 10% by mass to 90% by mass based on a total amount of the polyisocyanate mixture.

3. A coating composition comprising:
the polyisocyanate mixture according to claim 1 ; and
a compound which has two or more active hydrogens in a molecule.

4. A coating film which is obtained by curing the coating composition according to claim 3 .

5. The polyisocyanate mixture according to claim 1 ,
wherein a number average molecular weight of the polyisocyanate (B1) is in a range of 850 to 4000.

6. The polyisocyanate mixture according to claim 1 ,
wherein an average number of isocyanate groups contained in one molecule of the polyisocyanate in the polyisocyanate mixture is in a range of 3.2 to 8.

7. A polyisocyanate mixture comprising:
a triisocyanate compound (A) represented by Formula (I); and
polyisocyanate (B4) which is obtained from aliphatic diisocyanate containing at least 1,6-diisocyanatohexane and in which an expression of (a+b)/(a+b+c+d+e+f) in a case where each mol % of an uretdione structure, an iminooxadiazine dione structure, an isocyanurate structure, an allophanate structure, a urethane structure, and a biuret structure is set as a, b, c, d, e, and f is in a range of 0.02 to 0.50;
wherein Formula (I) is

in which each Y 1 independently represents a single bond or a divalent hydrocarbon group having 1 to 20 carbon atoms which may have an ester structure and/or an ether structure, each Y 1 may be the same as or different from one another, and R 1 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 12 carbon atoms.

8. The polyisocyanate mixture according to claim 7 ,
wherein the polyisocyanate (B4) contains 1% to 40% by mass of an uretdione dimer derived from aliphatic isocyanate based on a total amount of the polyisocyanate mixture.

Assignees

• Asahi Chemical Ind

Inventors

• Yamauchi Masakazu
• Fukuchi Takashi
• Takeno Satoshi

Classifications

• C08G18/798

  containing urethdione groups · CPC title

• C08G18/791

  containing isocyanurate groups · CPC title

• C08G18/725 Primary

  Combination of polyisocyanates of C08G18/78 with other polyisocyanates · CPC title

• C08G18/6225 Primary

  Polymers of esters of acrylic or methacrylic acid · CPC title

• C09D175/04

  Polyurethanes · CPC title