Coating processes – With post-treatment of coating or coating material – Vacuum or reduced pressure utilized
Reexamination Certificate
2000-04-05
2001-11-27
Cameron, Erma (Department: 1762)
Coating processes
With post-treatment of coating or coating material
Vacuum or reduced pressure utilized
C427S372200, C427S384000, C427S421100, C427S427000, C427S430100
Reexamination Certificate
active
06322853
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a flame resistant composition, a process for producing it, as well as flame resistant articles treated by such composition. More particularly, it relates to the treating of fabric, rugs, carpets, etc., as well as other non-textile flammable articles such as cardboard, paper, wood, etc., with a composition to make the article flame retardant. This flame resistant composition could also be added to paint to increase the thermal resistant properties of the paint and any articles coated by the paint.
Polymeric materials such as acrylics, reactive acrylics, vinyl chloride homopolymers and copolymers, styrene-butadiene copolymers, vinylidene chloride, vinyl acetate homopolymers and copolymers and styrene-butadiene-acrylonitrile terpolymers have been employed in the textile industry in the production of coated fabrics to furnish said fabrics with a coated backing. In accordance with conventional methods now in use, a drapery or other fabric or substrate is treated with a liquid emulsion of a polymeric material and then the treated fabric is cured and dried. However, such resultant coated fabrics have a number of limitations and deficiencies. For example, heretofore conventional polymeric coatings produced by the above method have exhibited disadvantages such as having a tendency to unduly penetrate or strike through the fabric, causing a stiffening or hardening of the coated fabric, and may fail to provide a complete uniform backing. Fabric coatings lacking such uniform opaqueness provide only a poor barrier against sunlight, thereby subjecting the fabric to eventual color and strength degradation and are poor insulators against weather elements. In order to overcome these deficiencies, conventional polymeric formulations may have to be coated onto the fabrics or other substrate in high weight amounts to insure opaqueness. Such high weight coatings may result in bulky fabrics that are objectionably stiff and unduly expensive.
The above mentioned disadvantages maybe readily and easily overcome by the disclosed unique and advantageous method of treating a fabric or other flammable non-textile articles, such as wood, paper, cardboard, etc. to make the article flame resistant. The present invention provides an improved treated fabric which is relatively soft and pliable as well as having good thermal insulation, good resistance to deterioration from aging or abrasion, and good resistance to repeated washing and dry cleaning operations. Furthermore, the chemically treated cloth (natural and synthetic) possesses flame resistance at temperatures higher than 1800° C. and the ability to thermally insulate against the transmission of heat. Other objects and advantages of the instant invention will be readily apparent from the following description and appended claims.
SUMMARY OF THE INVENTION
The disclosed invention increases the flame resistance and thermal insulation properties of chemically treated substances, in some cases providing the treated substance with flame resistance at tempertures higher than 1800° C. (direct fire), with no limit to the time of exposure. The prior art products of this type are generally known as “flame retardants” that have a maximum tolerance of 15 seconds after 170° C., after which they allow for the generation of flames and burning. The disclosed process chemically treats substances to prevent the generation of any flames. The substances that have successfully been tested after being treated with the disclosed process include cloth (natural and synthetic), rugs and carpets, wood, cardboard, and paper. However, it is believed that this process can be applied to an unlimited number of flammable cellulose substances.
With respect to the treatment of cloth, another advantage asserted for the disclosed process is that the texture and colors of the treated cloth are minimally affected, if at all. Furthermore, the chemical treatment of the cloth will last through six months of domestic washing.
A further application of the disclosed invention is as a coating on foam, particularly polyurethane foam and laminated foam. It is well known in the automotive industry to provide foam material that is “flame retardant.” However, applying the disclosed invention to foam material results in a resistance to all fire, not just an impedance to the flame for a limited period of time as known in the prior art.
An even further application of the disclosed invention is as an additive to paint, resulting in an increase in the paint's tolerance to fire. This increase in thermal resistance would necessarily be transferred to any articles coated with said paint.
A number of embodiments of flame resistant compositions are discussed herein but all embodiments include a mixture containing water, inorganic acids, ammonium salts, sodium carbonate and pyrophosphate and, in some instances, other constituents.
REFERENCES:
patent: Re. 29630 (1978-05-01), May
patent: 2530261 (1950-11-01), Morton et al.
patent: 3607341 (1971-09-01), Goins et al.
patent: 3763497 (1973-10-01), Leach
patent: 3775165 (1973-11-01), Young et al.
patent: 3859124 (1975-01-01), Thompson
patent: 3891727 (1975-06-01), Weil
patent: 3919439 (1975-11-01), Perkins et al.
patent: 3934285 (1976-01-01), May
patent: 4092251 (1978-05-01), Smith
patent: 4602081 (1986-07-01), Mikroyannidis et al.
patent: 4663226 (1987-05-01), Vajs et al.
patent: 5156775 (1992-10-01), Blount
patent: 5358780 (1994-10-01), Kafchinski et al.
patent: 5679277 (1997-10-01), Niibe et al.
patent: 5948148 (1999-09-01), Cuevas B.
patent: 6066198 (2000-05-01), Cuevas B.
patent: 1582658 (1969-10-01), None
patent: 49-023277 (1974-06-01), None
patent: 51-052699 (1976-05-01), None
patent: 8602114 (1986-03-01), None
Shafizadeh, et al., Fire Retardant Chem. (1975), 2 (3, Suppl.), pp. 195-203.
B. Ricardo Cuevas
Cameron Erma
Lee Mann Smith McWilliams Sweeney & Ohlson
LandOfFree
Process and product for rendering a substance flame resistant does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and product for rendering a substance flame resistant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and product for rendering a substance flame resistant will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2613315