URETHANE EMULSION

• US 20100092783A1
• Filed: 09/27/2007
• Published: 04/15/2010
• Est. Priority Date: 09/28/2006
• Status: Abandoned Application

• Current Assignee: Yokohama Rubber Company Limited
• Original Assignee: Yokohama Rubber Company Limited
• Inventors: Takahara, Hideyuki, Okamatsu, Takahiro
• Application Number:
  US12/443,527
• Publication Number:
  US 20100092783A1
• Time in Patent Office: Days
• US Class Current: 428/425.6
• CPC Class Codes: C08G 18/0823 containing carboxylate salt groups or groups forming them
• CPC Class Codes: C08G 18/3812 having fluorine atoms
• CPC Class Codes: C08G 18/61 Polysiloxanes
• CPC Class Codes: C08G 18/6279 containing fluorine atoms
• CPC Class Codes: C08G 18/8064 with monohydroxy compounds
• CPC Class Codes: C08L 2666/20 Macromolecular compounds having nitrogen in the main chain according to C08L75/00 - C08L79/00; Derivatives thereof
• CPC Class Codes: C08L 83/06 containing silicon bound to oxygen-containing groups C08L83/12 takes precedence
• CPC Class Codes: C09D 175/04 Polyurethanes
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31601 Quartz or glass
• CPC Class Codes: Y10T 428/31605 Next to free metal

Abstract

Disclosed is a urethane emulsion which enables to obtain a cured product having excellent water repellency. This urethane emulsion is obtained by stirring a urethane prepolymer composition containing a urethane prepolymer having a carboxy group, a neutralizing agent and water. This urethane emulsion is characterized in that the urethane prepolymer is obtained by reacting, at a specific ratio, a polyisocyanate compound having two or more isocyanate groups, a siloxane-containing polyol compound having two or more hydroxy groups and dimethyl siloxane and/or a fluorine-containing polyol having two or more hydroxy groups and fluoroethylene, and a carboxy group-containing compound having two or more hydroxy groups and a carboxy group.

Claims

1. A urethane emulsion obtained by agitating a urethane prepolymer composition comprising a carboxy group-containing urethane prepolymer, a neutralizing agent and water,

wherein the urethane prepolymer is obtained by reacting:

a polyisocyanate compound having at least two isocyanate groups,

a siloxane-containing polyol compound having at least two hydroxy groups and containing dimethylsiloxane and/or a fluorinated polyol having at least two hydroxy groups and containing fluoroethylene, and

a carboxy group-containing compound having at least two hydroxy groups and one or more carboxy groups,

at a molar ratio of the isocyanate groups to the carboxy groups of between 15 and 200, a molar ratio of the isocyanate groups to the combined amount of the dimethylsiloxane and the fluoroethylene of between 4.65 and 25, and a molar ratio of the dimethylsiloxane to the fluoroethylene of between 0.79 and 9.5.

2. The urethane emulsion of claim 1, wherein the fluorinated polyol has two or three hydroxy groups.

3. The urethane emulsion of claim 1, wherein said agitation is carried out at a shear rate of between 5,000 and 19,000 s⁻

1.

4. The urethane emulsion of claim 1, wherein said agitation is carried out using a thin-film spin type agitator.

5. A laminated body comprising a layer of the urethane emulsion of claim 1 and a substrate.

6. The laminated body of claim 5, wherein the substrate is made of glass, metal, plastic, mortar or concrete.

7. The laminated body of claim 5 which has a water sliding angle of 40 degrees or less.

8. The urethane emulsion of claim 2, wherein said agitation is carried out at a shear rate of between 5,000 and 19,000 s⁻

1.

9. The urethane emulsion of claim 2, wherein said agitation is carried out using a thin-film spin type agitator.

10. The urethane emulsion of claim 3, wherein said agitation is carried out using a thin-film spin type agitator.

11. A laminated body comprising a layer of the urethane emulsion of claim 2 and a substrate.

12. A laminated body comprising a layer of the urethane emulsion of claim 3 and a substrate.

13. A laminated body comprising a layer of the urethane emulsion of claim 4 and a substrate.

14. The laminated body of claim 6 which has a water sliding angle of 40 degrees or less.

15. The urethane emulsion of claim 8, wherein said agitation is carried out using a thin-film spin type agitator.

16. A laminated body comprising a layer of the urethane emulsion of claim 8 and a substrate.

17. A laminated body comprising a layer of the urethane emulsion of claim 9 and a substrate.

18. A laminated body comprising a layer of the urethane emulsion of claim 10 and a substrate.

19. A laminated body comprising a layer of the urethane emulsion of claim 15 and a substrate.

20. The laminated body of claim 11 which has a water sliding angle of 40 degrees or less.