AQUEOUS SURFACE TREATING AGENT AND SURFACE-TREATED STRUCTURE

• US 20080188606A1
• Filed: 02/28/2008
• Published: 08/07/2008
• Est. Priority Date: 08/30/2005
• Status: Abandoned Application

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Sugiyama, Kazunori, Maekawa, Takashige, Ibuki, Hitoshi, Asada, Shigenori
• Application Number:
  US12/039,218
• Publication Number:
  US 20080188606A1
• Time in Patent Office: Days
• US Class Current: 524/442
• CPC Class Codes: C04B 14/00 Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone expanding or defibrillating materials C04B20/00
• CPC Class Codes: C04B 14/048 Granite
• CPC Class Codes: C04B 14/108 Shale, slate colliery shale C04B18/125
• CPC Class Codes: C04B 2103/40 Surface-active agents, dispersants
• CPC Class Codes: C04B 2111/27 Water resistance, i.e. waterproof or water-repellent materials
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C04B 41/009 characterised by the material treated
• CPC Class Codes: C04B 41/483 Polyacrylates
• CPC Class Codes: C04B 41/4842 Fluorine-containing polymers
• CPC Class Codes: C04B 41/4846 Perfluoro-compounds
• CPC Class Codes: C04B 41/4884 Polyurethanes; Polyisocyanates
• CPC Class Codes: C04B 41/4922 applied to the substrate as monomers, i.e. as organosilanes RnSiX4-n, e.g. alkyltrialkoxysilane, dialkyldialkoxysilane
• CPC Class Codes: C04B 41/4961 Polyorganosiloxanes, i.e. polymers with a Si-O-Si-O-chain; "silicones"
• CPC Class Codes: C04B 41/502 Water
• CPC Class Codes: C08G 18/2825 having at least 6 carbon atoms
• CPC Class Codes: C08G 18/2845 Monohydroxy epoxy compounds
• CPC Class Codes: C08G 18/672 Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
• CPC Class Codes: C08G 18/7831 containing biuret groups
• CPC Class Codes: C08G 18/792 formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
• CPC Class Codes: C08G 18/8077 Oximes
• CPC Class Codes: C08G 77/18 : to alkoxy or aryloxy groups
• CPC Class Codes: C08L 2666/06 : Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: C08L 2666/14 : Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• 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: C09D 133/16 : Homopolymers or copolymers of esters containing halogen atoms
• CPC Class Codes: C09D 151/06 : grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• CPC Class Codes: C09D 175/04 : Polyurethanes
• CPC Class Codes: C09D 5/02 : Emulsion paints including aerosols

Abstract

To provide a stable aqueous surface treating agent for architectural/civil engineering structures, which can impart excellent water repellency and oil repellency (water proofness and oil proofness), antifouling properties, weather resistance and durability thereof to structures made of architectural/civil engineering materials such as stones or concrete, particularly porous materials.

The aqueous surface treating agent comprises at least one fluoropolymer (A) selected from a polyfluoroalkyl group-containing poly(meth)acrylate (A1) and a polyfluoroalkyl group-containing polyurethane (A2) in an aqueous medium. The aqueous surface treating agent usually contains a surfactant (B), and preferably contains a silicone (C), and further (D) a silane compound having a hydrolyzable group and/or a partially hydrolyzed condensate of a silane compound having a hydrolyzable group.

Claims

1. An aqueous surface treating agent for architectural/civil engineering structures, comprising at least one fluoropolymer (A) selected from a polyfluoroalkyl group-containing poly(meth)acrylate (A1) and a polyfluoroalkyl group-containing polyurethane (A2) in an aqueous medium.

2. The aqueous surface treating agent according to claim 1, wherein the above (A1) is a two-stage copolymer of a first component comprising homopolymerized units or copolymerized units of a polyfluoroalkyl group-containing (meth)acrylate and a second component comprising polyfluoroalkyl group-containing (meth)acrylate/non-fluorinated polymerizable compound copolymerized units.

3. The aqueous surface treating agent according to claim 2, wherein the above (A1) is polymer particles in a state where the second component is present on the surface or in the interior of particles comprising the first component.

4. The aqueous surface treating agent according to claim 1, wherein the above (A2) is a reaction product of a compound (a21) having one polyfluoroalkyl group and at least one group containing active hydrogen capable of reacting with an isocyanate group, with a polyisocyanate compound (a22).

5. The aqueous surface treating agent according to claim 1, wherein the content of the above (A) is from 1 to 40 mass %.

6. The aqueous surface treating agent according to claim 1, wherein the ratio of fluorine atoms in the polyfluoroalkyl group (R^f group) ({(the number of fluorine atoms in the R^f group)/(the number of hydrogen atoms in a corresponding alkyl group having the same number of carbon atoms as the R^f group)}×

100) is at least 60%.

7. The aqueous surface treating agent according to claim 1, which further contains a surfactant (B).

8. The aqueous surface treating agent according to claim 1, which further contains a silicone (C).

9. The aqueous surface treating agent according to claim 1, which further contains (D) a silane compound having a hydrolysable group and/or a partially hydrolyzed condensate of a silane compound having a hydrolysable group.

10. A surface treating method, which comprises applying the aqueous surface treating agent as defined in claim 1 to the surface of an architectural/civil engineering structure to form a coating film.

11. An architectural/civil engineering structure treated by the method as defined in claim 10.

12. The aqueous surface treating agent according to claim 2, which further contains a silicone (C).

13. The aqueous surface treating agent according to claim 3, which further contains a silicone (C).

14. The aqueous surface treating agent according to claim 4, which further contains a silicone (C).

15. The aqueous surface treating agent according to claim 5, which further contains a silicone (C).

16. The aqueous surface treating agent according to claim 6, which further contains a silicone (C).

17. The aqueous surface treating agent according to claim 7, which further contains a silicone (C).