Water-dispersible water-and-oil repellant composition

• US 6,395,821 B1
• Filed: 11/29/2000
• Issued: 05/28/2002
• Est. Priority Date: 03/29/1999
• Status: Expired due to Term

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Shimada, Toyomichi, Maekawa, Takashige
• Primary Examiner(s): Yoon, Tae H.
• Application Number:
  US09/701,368
• Time in Patent Office: 545 Days
• Field of Search: 524/520,544 526/245 525/374,375 428/375
• US Class Current: 524/520
• CPC Class Codes: C08G 18/6279 containing fluorine atoms
• CPC Class Codes: C08L 2666/16 Addition or condensation polymers of aldehydes or ketones according to C08L59/00 - C08L61/00; Derivatives thereof
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: C09K 3/18 for application to surfaces to minimize adherence of ice, mist or water thereto rendering particulate materials free flowing, in general, e.g. making them hydrophobic B01J2/30; Thawing or antifreeze materials for application to surfaces used in liquids for heat-transfer, heat-exchange or heat-storage or for the production of heat or cold other than by combustion, e.g. radiator liquids, C09K5/00
• CPC Class Codes: D06M 15/27 of alkylpolyalkylene glycol esters of unsaturated carboxylic acids
• CPC Class Codes: D06M 15/273 of unsaturated carboxylic esters having epoxy groups
• CPC Class Codes: D06M 15/277 containing fluorine
• CPC Class Codes: D06M 15/29 containing a N-methylol group or an etherified N-methylol group; containing a N-aminomethylene group; containing a N-sulfidomethylene group
• CPC Class Codes: D06M 15/423 Amino-aldehyde resins
• CPC Class Codes: D06M 15/564 Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
• CPC Class Codes: D06M 15/576 containing fluorine
• CPC Class Codes: D06M 2200/11 Oleophobic properties
• CPC Class Codes: D06M 2200/12 Hydrophobic properties
• CPC Class Codes: Y10T 428/2933 Coated or with bond, impregnation or core

Abstract

The invention relates to a water dispersion type water and oil repellent composition which satisfies both repeated washing durability of water and oil repellency and durability of hydrostatic pressure resistance. A water dispersion type water and oil repellent composition comprising (A) a fluorine-containing copolymer having hydroxy groups, (B) a fluorine-containing copolymer having epoxy groups, (C) a compound having a blocked isocyanate group and having no carbon-carbon unsaturated bond and (D) an amino resin, as effective components.

Claims

1. A water dispersion of water and oil repellent composition comprising the following copolymer (A), the following copolymer (B), the following compound (C) and an amino resin (D):

Copolymer (A);

a copolymer having polymer units based on a polymerizable monomer having a hydroxyl group and polymer units based on a polymerizable monomer having a polyfluoroalkyl group;

Copolymer (B);

a copolymer having polymer units based on a polymerizable monomer having an epoxy group and polymer units based on a polymerizable monomer having a polyfluoroalkyl group; and

Compound (C);

a compound having a blocked isocyanate group and no polymerizable carbon-carbon unsaturated bond.

2. The water dispersion of water and oil repellent composition according to claim 1, wherein fine particles of the copolymer (A), fine particles of the copolymer (B) and fine particles of the compound (C) are dispersed in an aqueous medium, and the amino resin (D) is dissolved in the aqueous medium.

3. The water dispersion of water and oil repellent composition according to claim 1, wherein the weight ratio of the copolymer (A) to the copolymer (B) is (A)/(B)=20/80 to 80/20, and relative to the total amount of the copolymer (A) and the copolymer (B), the compound (C) is from 0.5 to 50 wt % and the amino resin (D) is from 0.1 to 5 wt %.

4. A fiber treated with the water dispersion of water and oil repellent composition as defined in claim 1.

5. The water dispersion of water and oil repellent composition according to claim 2, wherein the weight ratio of the copolymer (A) to the copolymer (B) is (A)/(B)=20/80 to 80/20, and relative to the total amount of the copolymer (A) and the copolymer (B), the compound (C) is from 0.5 to 50 wt % and the amino resin (D) is from 0.1 to 5 wt %.