Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1992-01-02
1994-08-30
Lovering, Richard D.
Coating processes
With post-treatment of coating or coating material
Heating or drying
427396, 427397, 427439, 427440, 252602, 252607, 252608, B32B 2700, C09K 2102, C09K 2110
Patent
active
053426568
DESCRIPTION:
BRIEF SUMMARY
The present invention concern a flame retarding and smoke retarding mixture, a method for producing a solution of the mixture and the application of the mixture for treating materials that are normally combustible.
Means are known how to apply different substances and mixtures to treat materials that are normally combustible to make them less combustible and work as smoke retardants.
Different chemical compounds with flame retarding or smoke retarding characteristics are described in U.S. Pat. Nos. 4,168,175; 4,342,669 and 4,438,028 and GB Patent Specification no. 1,462,828. None of the mixtures described in these specifications give completely satisfactory results, since each mixture gives better results in one area than it does in other areas.
U.S. Pat. No. 4,595,414 describes the impregnation of cellulose materials with a mixture of monoammonium phosphate, diammonium phosphate, a freely-chosen corrosion inhibitor and a surfactant. This mixture has subsequently been found to be most effective for nonflammable impregnation of cellulose textiles. The difficulty with such impregnation substances is that they give a relatively hard, stiff cellulose. Phosphates can also contain colourful contaminants.
U.S. Pat. No. 4,514,327 describes a fire retardant mixture consisting of ammonium sulphate, borax, boric acid and monoammonium phosphate. This mixture will not supply wood with enough impregnation substance to meet the Norwegian classification for a fire retardant. In the production method filtration is mentioned through filters sized 5 micrometers, which will involve a very expensive process. Boric compounds such as borax and boric acid are also classified as health risks, partly because of the damage that can be done to the central nervous system. The use of such compounds must thus be considered unfortunate both in the production process and when utilizing the product such as in impregnated clothes. This patent specification does not cover the use of EDTA or NaHCO.sub.3.
GB Patent Specification no. 2,165,270 describes a fire retardant mixture consisting of water-soluble monosodium phosphate, ammonium sulphate and borax and/or boric acid for the impregnation of porous materials. As mentioned above, this compound will also represent a danger. This specification does not mention the use of EDTA or NaHCO.sub.3 to improve the impregnation and the fire retardant characteristics.
DE Patent Specification no. 2,732,561 describes a mixture that consists of ammonium ions, zinc ions, earth alkaline metal ions, chloride ions, bromide ions and phosphate ions. This patent specification also does not cover the use of EDTA or NaHCO.sub.3 and the fire tests are not done in accordance with any standard.
The main objective of the present invention is to produce a mixture that gives better results than any existing known products for the impregnation of materials that are normally combustible to prevent the combustion of the treated materials, and prevent smoke development should they be ignited or exposed to excessive heat.
A second objective of the present invention is to produce a mixture for the impregnation of textiles made of materials such as rayon, cotton and wool, or other combustible, water-absorbent materials; and the impregnation of wood, paper and other cellulose (wood) products, as well as other organic materials.
A further objective with the present invention is to produce a nontoxic mixture that is neutral as far as color is concerned.
If a mixture is produced and used in accordance with the invention this will result in wood and textiles being impregnated to make them nonflammable and prevent smoke development should they be ignited or exposed to excessive heat.
The invention will now be described in more detail where reference will be made to the figures, where
FIG. 1 shows the results from a technical fire test of spruce paneling impregnated with a mixture in accordance with the invention, and
FIG. 2 shows the same as FIG. 1, but impregnated pine is used as the test material.
The present invention has been deve
REFERENCES:
patent: 3409550 (1968-11-01), Gould
patent: 3806488 (1974-04-01), Stone et al.
patent: 4182681 (1980-01-01), Gumbert
patent: 4468495 (1984-08-01), Pearson
patent: 4514327 (1985-04-01), Rock
patent: 4842611 (1989-06-01), Hoffman
patent: 4908160 (1990-03-01), Thacker
patent: 4971728 (1990-11-01), Vandersall
Chemical Abstracts, vol. 91, No. 16, 15 Oct. 1979, (Columbus, Ohio, US), Anon.: "Improved intumescent fire retardant coating composition".
Chemical Abstracts, vol. 105, No. 6, 11 Aug. 1986, (Columbus, Ohio, US), Izumikawa, M. et al.: "Flame spread of paper sheets containing suppressants".
Research Disclosure Jul. 1979 #18306; Chemical Abstract vol. 105 (1986) No. 6, pp 1413-1419.
Anthony Joseph D.
Lovering Richard D.
Pittenger James E.
LandOfFree
Flame retarding and smoke retarding mixture does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flame retarding and smoke retarding mixture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flame retarding and smoke retarding mixture will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-28709