Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Reexamination Certificate
2000-03-23
2004-02-24
Nakarani, D. S. (Department: 1773)
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
C428S213000, C428S215000, C428S425500, C428S425800, C428S450000, C428S451000
Reexamination Certificate
active
06696143
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to abrasion-resistant coating compositions, methods for making them, and articles coated with them.
More particularly, the invention provides an improved silicon-containing cured synthetic resin coating composition which forms a protective, abrasion resistant coating. Such coating compositions are sometimes referred to as silicone hard coat resins, or organo-polysiloxanes, such as the compounds produced by the condensation of hydroxy organosilicon compounds formed by the hydrolysis of organosilicon halides. The preferred silicon-containing coating compositions include products which combine colloidal silica with various acryloxy or glycidoxy functional compounds, such as acryloxy or glycidoxy functional silanes, or non-silyl acrylates.
Transparent abrasion-resistant coatings made from silicon-containing synthetic resins have been used to coat transparent plastics which do not shatter or are more resistant to shattering than glass, but which are subject to scratching and marring due to everyday contact with abrasives such as dust, cleaning equipment, and ordinary weathering. However, the application of the silicon-containing coating compositions to plastic substrates sometimes requires a primer to improve adhesion between the two materials. In some instances even the use of a primer is inadequate for good adhesion. Moreover, the application of these prior art silicon-containing coating compositions to metal surfaces has met with little success because of inadequate adhesion between the metal and the cured resin.
Even when good adhesion is obtained with the prior art silicon-containing coating compositions, the final top coat does not provide optimum hardness.
SUMMARY OF THE INVENTION
This invention provides a silicon-containing cured synthetic resin coating composition which bonds firmly to plastic and to metal surfaces to provide superior protection from abrasion and chemical attack. The coating composition of the invention includes a base coat layer of cured base coat resin, such as polyurethane, polycarbonate, polystyrene, acrylic, polyolefin, nylon, melamine, ABS, and SAN, which bonds strongly to the metal surface to be protected. A top coat layer of uncured silicon-containing synthetic resin is deposited on the cured layer of cured base coat resin, and heated to create a strong interlinking between the silicon-containing synthetic resin and the cured base coat resin. Thereafter, the silicon-containing synthetic resin is cured by heat, actinic radiation such as UV light, or particle radiation such as electron beam. The final silicon-containing cured synthetic resin coating composition can be clear or pigmented. For example, a base coat of polyurethane-containing resin can include pigment or metallic particles for decorative effect.
Practically any kind of metal surface which has been adequately cleaned can be coated in accordance with this invention. A polyurethane-containing base coat layer can be any of the well-known polyurethane coating compositions, or blends of polyurethane and acrylic resin. The layer of polyurethane or a polyurethane/acrylic mixture is coated onto a clean metal surface by any of the suitable, well-known and commercially available processes, such as spraying or electrodeposition.
REFERENCES:
patent: 3451838 (1969-06-01), Burzynski et al.
patent: 3617458 (1971-11-01), Brockman et al.
patent: 3679564 (1972-07-01), Dowbenko et al.
patent: 3707397 (1972-12-01), Gagnon
patent: 3869366 (1975-03-01), Suzuki et al.
patent: 3922253 (1975-11-01), Jerabek et al.
patent: 3947338 (1976-03-01), Jerabek et al.
patent: 3981897 (1976-09-01), Crivello
patent: 3986997 (1976-10-01), Clark
patent: 4027073 (1977-05-01), Clark
patent: 4058444 (1977-11-01), Shibayama et al.
patent: 4136102 (1979-01-01), Crivello
patent: 4207357 (1980-06-01), Goossens
patent: 4241200 (1980-12-01), Woo
patent: 4242381 (1980-12-01), Goossens
patent: 4284685 (1981-08-01), Olson et al.
patent: 4308317 (1981-12-01), Olson et al.
patent: 4313979 (1982-02-01), Frye et al.
patent: 4320172 (1982-03-01), Takamizawa et al.
patent: 4348462 (1982-09-01), Chung
patent: 4353959 (1982-10-01), Olson et al.
patent: 4373060 (1983-02-01), Ching
patent: 4416753 (1983-11-01), Batzill et al.
patent: 4477642 (1984-10-01), Geist et al.
patent: 4496672 (1985-01-01), Batzill et al.
patent: 4547409 (1985-10-01), Geist et al.
patent: 4554212 (1985-11-01), Diefenbach et al.
patent: 4612049 (1986-09-01), Berner et al.
patent: 4615947 (1986-10-01), Goossens
patent: 4617331 (1986-10-01), Boberski et al.
patent: 4618657 (1986-10-01), Katchko et al.
patent: 4624870 (1986-11-01), Anthony
patent: 4869796 (1989-09-01), Kanda et al.
patent: 4895887 (1990-01-01), Daimon et al.
patent: 4939216 (1990-07-01), Lawrenze et al.
patent: 4973392 (1990-11-01), Gupta
patent: 5021266 (1991-06-01), Yamaya et al.
patent: 5034262 (1991-07-01), Komatsu et al.
patent: 5091460 (1992-02-01), Seto et al.
patent: 5120811 (1992-06-01), Glotfelter et al.
patent: 5137573 (1992-08-01), Daimon et al.
patent: 5242719 (1993-09-01), Medford et al.
patent: 5260350 (1993-11-01), Wright
patent: 5286569 (1994-02-01), Werner, Jr. et al.
patent: 5342658 (1994-08-01), Hong et al.
patent: 5350636 (1994-09-01), Huemke et al.
patent: 5401823 (1995-03-01), Huemke et al.
patent: 5468789 (1995-11-01), Lewis et al.
patent: 5518818 (1996-05-01), Kidai et al.
patent: 5607729 (1997-03-01), Medford
patent: 5708048 (1998-01-01), Medford et al.
patent: 5712325 (1998-01-01), Lewis et al.
patent: 5756221 (1998-05-01), Horibe et al.
patent: 5998013 (1999-12-01), Shoshi et al.
Benchmark Products,Technical Data Bulletinfor BENCHMATE 320 P Aug. 6, 1991.
Benchmark Products,Material Safety Data SheetAug. 6, 1991.
ClearClad Coatings, Inc.,Installation and Operation Manual, Release No. 2.0, Manual Ser. No: 1192, 1997.
N. Z. Erdy, et al., “Preparation of Block Copolymers by Use of Peroxide-Terminated Prepolymer”,Journal of Polymer Science: Part A-I, vol. 8, pp. 763-769 (1970), Department of Chemistry, Princeton University, Princeton, New Jersey.
Otto Gelner, “Surface-Active Agents”,Encylopedia of Polymer Science and Technology, vol. 13, pp. 477-486, 1970, Interscience Publishers, New York.
GE Silicones, “UVHC 8558 Abrasion Resistant Silicone and Hard Coat Fast Cure”, product description sheet 4979, (12/94).
GE Silicones, product description 5208 for SHC 5020, (6/98).
GE Silicones, product description 5276 for SHC 6000, (6/98).
GE Silicones,Material Safety Data Sheetfor UVHC 8558 Feb. 12, 1993.
GE Silicones,Material Safety Data Sheetfor UVHC 3000 hard coat Apr. 1, 1999.
Kirk-Othmer, “Surfactants”,Encyclopedia of Chemical Technology, vol. 19, pp. 507-593, Interscience Publishers, New York, pp. 1969.
DL Poczynok, “Synthesis, Characterization and Copolymerization of Heptamethycyclotetrasiloxane-YL Modified Silica and Polycyclosiloxanes”,Dissertation Abstracts International, Grand vol. 55/08-B, p. 3337, May 1994.
Solin Products, Inc., “Material Safety Data Sheet” for AC-25 ™, 4/90.
Solin Products, Inc., “Product Bulletin No. 11034”, for Soak 715 ™, Jan. 1, 1993.
Christie Parker & Hale LLP
Nakarani D. S.
LandOfFree
Abrasion resistant coating compositions, methods for making... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Abrasion resistant coating compositions, methods for making..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abrasion resistant coating compositions, methods for making... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3282511