Sulfonato-organosilanol compounds and aqueous solutions thereof

• US 4,267,213 A
• Filed: 10/10/1979
• Issued: 05/12/1981
• Est. Priority Date: 04/11/1978
• Status: Expired due to Term

• Current Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Original Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Inventors: Sher, Frank T., Tiers, George V. D., Beck, Boyd R.
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Buffala, E. Rollins
• Application Number:
  US06/083,465
• Time in Patent Office: 580 Days
• Field of Search: 427/290, 427/387, 427/372, 427/292, 428/446, 428/447, 428/448, 428/516, 260/448.21
• US Class Current: 427/292
• CPC Class Codes: C01P 2004/80 Particles consisting of a mixture of two or more inorganic phases
• CPC Class Codes: C01P 2006/90 Other properties not specified above
• CPC Class Codes: C03C 17/30 with silicon-containing compounds
• CPC Class Codes: C04B 2111/00439 Physico-chemical properties of the materials not provided for elsewhere in C04B2111/00
• CPC Class Codes: C04B 41/4927 Alkali metal or ammonium salts
• CPC Class Codes: C04B 41/4938 containing silicon bound to hydroxy groups, e.g. trimethyl silanol
• CPC Class Codes: C04B 41/4944 containing atoms other than carbon, hydrogen, oxygen, silicon, alkali metals or halogens, e.g. N-silyldisilazane: Image
• CPC Class Codes: C04B 41/4966 containing silicon bound to hydroxy groups, i.e. OH-blocked polysiloxanes
• CPC Class Codes: C04B 41/502 Water
• CPC Class Codes: C04B 41/53 involving the removal of at least part of the materials of the treated article, e.g. etching, drying of hardened concrete C04B41/0036 - C04B41/0054 take precedence
• CPC Class Codes: C07F 7/0836 Compounds with one or more Si-OH or Si-O-metal linkage
• CPC Class Codes: C09C 1/3081 Treatment with organo-silicon compounds

Abstract

Sulfonato-organosilanol compounds and aqueous solutions and compositions thereof are provided which have at least one sulfonato-organic substituent therein. The weight percentage of oxygen in the compounds is at least about 30% and the weight percentage of silicon in the compounds is not greater than about 15%, these percentages being taken with reference to the water-free acid form of the compounds. Hydrophilic siliceous surfaces and processes for imparting hydrophilicity to such surfaces are also provided.

Claims

1. A process for imparting hydrophilicity to a substrate having a siliceous surface said process comprising the steps of:

(a) contacting said surface with an aqueous solution comprising a sulfonato-organosilanol compound having at least one sulfonato-organic substituent, wherein the weight percentage of oxygen in said compound is at least about 30%, and the weight percentage of silicon in said compound is not greater than about 15%, said percentages being taken with reference to the water-free acid form of said compound, and

(b) drying said solution on said surface.

2. A process in accordance with claim 1 wherein there is further included the step of treating said substrate with an abrasive material immediately prior to or simultaneously with contacting said surface with said aqueous solution.

3. A process in accordance with claim 2, wherein said surface is selected from glass and glazed ceramics.

4. A process in accordance with claim 1 wherein said surface comprises polymeric and non-polymeric materials having thereon a layer of --SiO_x -- wherein x is 1 to 2.