Coating processes – With post-treatment of coating or coating material – Heating or drying
Reexamination Certificate
2001-01-16
2002-12-10
Cameron, Erma (Department: 1762)
Coating processes
With post-treatment of coating or coating material
Heating or drying
Reexamination Certificate
active
06491979
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a fluorine-containing surface treatment composition, a product to be used for surface treatment comprising the surface treatment composition, and a process for surface treatment.
BACKGROUND ART
Fluorine-containing surface treatment compositions are applied to various substrate surfaces to impart thereto various properties characteristic of fluorine-containing compounds, such as low surface energy, non-adhesion (mold releasability), water repellency and oil repellency. For example, with use of metal or other items as substrates, the fluorine-containing surface treatment compositions find applications as mold release agents, resin adhesion inhibitors, flux barrier agents, anti-adhesion agents, antiblocking agents, rear surface treatment agents, antitacking agents, electric wire stripping agents and lubricants.
Chlorofluorocarbons have been widely used as solvents for solvent-based fluorine-containing surface treatment compositions because the chlorofluorocarbons are less toxic, nonflammable and chemically stable. Particularly CFC-113, which has a moderate boiling point, has been widely used. However, ozone layer depletion by specific chlorofluorocarbons such as CFC-113 became a problem and production of such chlorofluorocarbons has been discontinued on a world-wide scale.
Under such circumstances, much study was carried out on solvents which may replace the chlorofluorocarbons. Since it was considered that hydrochlorofluorocarbons could be a replacement, various fluorine-containing surface treatment compositions containing HCFC-141b as a solvent were developed. Although hydrochlorofluorocarbons have low ozone depletion potential (ODP), it does not mean that the hydrochlorofluorocarbons do not cause any ozone depletion. For this reason, reduction or total abolition of hydrochlorofluorocarbons has been decided.
In such circumstances, further research was carried out and fluorine-containing surface treatment compositions containing solvents such as perfluorocarbon (PFC) and perfluoroether (PFE) were developed (e.g., “DAIFREE GF-6400” manufactured by Daikin Industries, Ltd., Japanese Unexamined Patent Publication No. 109158/1997, etc.). However, perfluoro-solvents were found to cause an environmental problem of greatly affecting global warming, although the perfluoro-solvents do not cause ozone layer depletion. For this reason, limitation on perfluoro compound emissions has been decided, and it is currently difficult to use such perfluoro-solvents.
DISCLOSURE OF THE INVENTION
A primary object of the present invention is to provide a fluorine-containing surface treatment composition that has excellent storage stability and excellent performance characteristics as a surface treatment agent and is highly safe due to the non-flammability or flame retardancy thereof, the composition causing hardly any ozone layer depletion and global warming.
The inventors of the present invention carried out intensive research in view of the above problems and finally found the following. The object can be achieved with a fluorine-containing surface treatment composition comprising a fluorine-containing surface treatment component and a solvent component, wherein the solvent component contains 5 wt. % or more of a chlorine-free, non-flammable halogen-containing solvent which has an ozone depletion potential (ODP) of 0.03 or less, a 100-year integrated global warming potential (GWP) value of 500 or less, and a KB value of 5 or more. The present invention has been accomplished based on this finding.
The present invention provides the following fluorine-containing surface treatment composition, product to be used for surface treatment comprising the surface treatment composition, and process for surface treatment.
1. A fluorine-containing surface treatment composition comprising a surface treatment component and a solvent component, wherein the solvent component contains 5 wt. % or more of a chlorine-free, non-flammable halogen-containing solvent which has an ozone depletion potential (ODP) of 0.03 or less, a 100-year integrated global warming potential (GWP) value of 500 or less, and a KB value of 5 or more, the composition being used for purposes other than a water-repellent and an oil-repellent.
2. The fluorine-containing surface treatment composition according to item 1 wherein the halogen-containing solvent has a boiling point of 0° C. to 150° C.
3. The fluorine-containing surface treatment composition according to item 1 or 2 wherein the surface treatment component comprises at least one species selected from:
(1) phosphorus-containing compounds having at least one fluorine-containing group selected from polyfluoroalkyl groups and polyfluoroalkenyl groups;
(2) highly fluorinated organic compounds; and
(3) polymers prepared using as a monomer component a compound having at least one fluorine-containing group selected from polyfluoroalkyl groups and polyfluoroalkenyl groups.
4. The fluorine-containing surface treatment composition according to item 1 or 2 wherein
the surface treatment component contains 5 wt. % or more of at least one component selected from
(1) phosphorus-containing compounds having at least one fluorine-containing group selected from polyfluoroalkyl groups and polyfluoroalkenyl groups and
(2) highly fluorinated organic compounds, and
the solvent component contains 50 wt. % or more of hydrofluoroether.
5. The fluorine-containing surface treatment composition according to item 4 wherein the surface treatment component comprises:
at least one component selected from
(1) phosphorus-containing compounds having at least one fluorine-containing group selected from polyfluoroalkyl groups and polyfluoroalkenyl groups and
(2) highly fluorinated organic compounds; and
at least one component selected from (i) silicone compounds and (ii) waxes.
6. The fluorine-containing surface treatment composition according to item 5 wherein the solvent component comprises hydrofluoroether and at least one solvent selected from aromatic solvents, petroleum solvents, ketone solvents and bromine-containing solvents.
7. The fluorine-containing surface treatment composition according to item 6 wherein
the surface treatment component contains 30-95 wt. % of at least one component selected from (1) phosphorus-containing compounds having at least one fluorine-containing group selected from polyfluoroalkyl groups and polyfluoroalkenyl groups and (2) highly fluorinated organic compounds and 70-5 wt. % of at least one component selected from (i) silicone compounds and (ii) waxes; and
the solvent component contains 50-90 wt. % of hydrofluoroether and 10-50 wt. % of at least one solvent selected from aromatic solvents, petroleum solvents, ketone solvents and bromine-containing solvents.
8. The fluorine-containing surface treatment composition according to item 1 or 2 wherein
the surface treatment component contains 5 wt. % or more of (3) a polymer prepared using as a monomer component a compound having at least one fluorine-containing group selected from polyfluoroalkyl groups and polyfluoroalkenyl groups; and
the solvent component contains 50 wt. % or more of a bromine-containing solvent.
9. The surface treatment composition according to item 8 wherein the surface treatment component comprises:
(3) a polymer prepared using as a monomer component a compound having at least one fluorine-containing group selected from polyfluoroalkyl groups and polyfluoroalkenyl groups; and
at least one component selected from (2) highly fluorinated organic compounds, (i) silicone compounds and (ii) waxes.
10. The surface treatment composition according to item 9 wherein the surface treatment component contains:
30-95 wt. % of (3) a polymer prepared using as a monomer component a compound having at least one fluorine-containing group selected from polyfluoroalkyl groups and polyfluoroalkenyl groups; and
70-5 wt. % of at least one component selected from (2) highly fluorinated organic compounds, (i) silicone compounds and (ii) waxes.
11. The surface treatment composition according to item 8 w
Nakamae Yasushi
Yamaguchi Fumihiko
Cameron Erma
Daikin Industries Ltd.
Larson & Taylor PLC
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