Viscosity modifiers and compositions

Abstract

This invention improves the storage stability of viscosity modifiers containing diurethane diurea compounds, preventing the formation of precipitates in liquid viscosity modifiers and preventing solidification of liquid viscosity modifiers. [Solution] The viscosity modifier contains, as a component, a urethane-urea compound (A) having two or more urethane groups and two or more urea groups in one molecule, an aprotic polar solvent (B), and one or more compounds (C) selected from the group consisting of salts and urea compounds soluble in the aprotic polar solvent (B). This improves the storage stability of the liquid viscosity modifier. As a result, precipitates do not form in the liquid viscosity modifier even after time has passed, and the viscosity modifier does not solidify, so the viscosity modifier can exhibit its inherent properties of preventing sagging and settling, and the generation of lumps can be prevented.

Claims

1. A urethane-urea compound (A) having two or more urethane groups and two or more urea groups in one molecule, aprotic polar solvent (B), One or more compounds (C) selected from the group consisting of salts and urea compounds soluble in the aprotic polar solvent (B), A viscosity modifier containing [a certain substance].

2. The viscosity modifier according to claim 1, further containing a diurethane compound (D).

3. The viscosity modifier according to claim 1, wherein the urethane urea compound (A) is a reaction product of a prepolymer obtained by reacting a hydroxy compound selected from the group consisting of monohydroxy compounds and polyhydroxy compounds with an isocyanate compound selected from the group consisting of polyisocyanates, polyisocyanurates, and biuret compounds, and a polyamine.

4. The hydroxy compound is R-OH (R is an n-alkyl group or isoalkyl group having 1 to 22 carbon atoms, a cycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or C ｍ H ２ｍ＋１ (O-C ｎ H ２ｎ ) ｘ - or C ｍ H2 ｍ＋１ (OOC-C ｖ H ２ｖ ) ｘ - (where m is a natural number from 1 to 22, n is a natural number from 2 to 4, x is a natural number from 1 to 15, and v is 4 or 5).) is a monohydroxy compound represented by The isocyanate compound is a diisocyanate having one or more functional groups selected from the group consisting of aliphatic groups, alicyclic groups, aromatic groups, and aromatic aliphatic groups. The viscosity modifier according to claim 3, wherein the polyamine is a diamine having one or more functional groups selected from the group consisting of aliphatic groups, alicyclic groups, aromatic groups, and aromatic aliphatic groups.

5. The viscosity modifier according to claim 1, wherein the aprotic polar solvent (B) is one or more compounds selected from the group consisting of N-substituted lactams, amide solvents, urea solvents, sulfoxide solvents, ketone solvents, ether solvents, ester solvents, and nitrile solvents.

6. The viscosity modifier according to claim 1, wherein the salt is one or more salts selected from the group consisting of metal salts and ammonium salts.

7. The viscosity modifier according to claim 1, wherein the urea compound is one or more compounds selected from the group consisting of urea and urea compounds having a molecular weight of 60 g / mol or more and 2500 g / mol or less.

8. The viscosity modifier according to claim 1, wherein the content of compound (C) is 10 mol% or more with respect to 100 mol of urea groups in the urethane urea compound (A).

9. The viscosity modifier according to claim 8, wherein the content of compound (C) is 200 mol% or less with respect to 100 mol of urea groups in the urethane urea compound (A).

10. The viscosity modifier according to claim 2, wherein the molecular weight of the diurethane compound (D) is 200 g / mol or more and 2000 g / mol or less.

11. The viscosity modifier according to claim 2, wherein the content of the diurethane compound (D) is greater than 0% by mass and less than or equal to 200% by mass with respect to the mass of the urethane urea compound (A).

12. A composition containing the viscosity modifier described in any one of claims 1 to 11.

13. The composition is a paint composition, The composition according to claim 12, wherein the NV value of the paint composition is 60% by mass or less.

14. The composition according to claim 13, wherein the NV value of the paint composition is 25% by mass or more.

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