Патент USA US3027336код для вставки
March 27, 1962 3,027,326 R. s. MOFFETT INSULATIONMATERIAL Filed May 2o, 1959 0MM m . mg f M „J MMfm R.” NM ¿ß w ., United States Patent O 3,327,326 f. ICC Patented Mai'. 27, 1952 2 1 der 11 is applied to a dry mixer 12. Chemicals from a 3,027,326 KNSULATÍON MATERIAL source of tire-resistant chemicals 13, rodent and roach repellent from a source of rodent and roach repellent 14, Robert S. Moffett, Woodland Hills, Calif., assignor toV Insul-Seal Products, Inc., Pasadena, Calif., a corpora and dye from a dye source 15 are also applied to the dry mixer 12. tion of California Boric acid, H3BO3, and ammonium sulfate, (NH4)2SO4, Filed May 20, 1959, Ser. No. 814,529 3 Claims. (Cl. 252-62) are combined with the wood fiber ñuif to give initial fire This invention relates to an improved insulation mate rial of the shredded wood iiber type. Insulation materials consisting of asbestos or glass fibers arewell known. Such insulating materials have a gen erally satisfactory resistance to burning and a compara tively low heat transfer coefiicient. However, such insu resistant properties to the ñuff. Such fire-resistant prop erties are evidenced by a greenish glow which surrounds 10 portions of the ñuff as the ñuff slowly chars in response to the application of a direct llame. The fire-retardant quality of the flniT so treated is considerably superior to this property in conventional asbestos or glass über in sulating materials. lating materials do melt or char to an extent suñicient to transfer a flame through the material. Furthermore, a The treatment of the wood fiber ñutf formed from used newsprint with boric acid and ammonium sulfate does not signiñcant amount of heat is transmitted through such in remove ink and-other impurities from the fluff which ex isted in the newsprint. These impurities have been found sulating materials, to be attractive to rodents and roaches of various types. According to the present invention, an improved re sistance to charring and a lower coeiiicient of heat trans 20 It has been found that the addition of potassium alum, A12(SO4) 3K2SO4~24H2O, to the ñuff renders the end prod fer in an insulation material is exhibited by the end prod uct unattractive to such rodents and roaches. uct of a process consisting of treating shredded wood The use of used newsprint, even when treated to the fiber material with ammonium sulfate, boric acid, potas extent previously described, results in a gray material sium alum, a dye from the family of dyes consisting of the diamino derivatives of triphenyl methane, and water. 25 which lacks any attractiveness in its color. A dye is there fore added to the material in order to give the end prod In addition, a liquid aromatic agent is utilized to give the uct insulating material a satisfactory color appearance end product insulating material an acceptable aroma. for commercial use. A dye from the family of dyes con These constituents are then chemically combined. After chemical processing, the insulation material is dried by being fluidized Aby air and is >then packed into appropriate sisting of diamino derivatives of triphenyl methane also 30 adds fire-retardant qualities to the insulating material. An example of such a dye is Brilliant Green, diethylamino triphenyl methane, whose chemical representation is containers. A moisture absorption test of the material shows the following typical characteristics: 35 Percent Loss in Time of Exposure, Hours Weight, Percent Gain in Weight, 50 o 75% Relative Relative Percent Gain in Weight, u Relative Humidity Humidity Humidity l. 15 1. 55 1. 78 1. 81 2. 49 3. 37 5. 90 10. 8U 32. 5 The resulting dry mix out-put is fed to a wet mixer 16. Water from a water source 17 and liquid aromatic from a source of liquid aromatics 18 are also applied to the wet mixer 16. An example of such a liquid aromatic is “Alamask The tire-resistant quality of the insulation material is 45 CPM,” which has the following composition: illustrated by the following test. After being maintained Percent at a constant temperature of 135° Fahrenheit for thirty nine days, the insulation material is subjected directly to a dame from a Bunsen burner for a period of fifteen min utes. After removal of the llame, smoldering of the in sulation material is visible for no longer than two and one-half minutes. The maximum penetration of oharring Organic aldehydes __________________________ __ 3.5 Acetates as Iso Dorynl ______________________ __ 9.9 Organic ketones ____________________________ __ 5.7 50 Essential oil terpenes ________________________ __ 60.3 Organic esters as phthalate ___________________ __ 20.6 Alamask CPM has the additional properties when com into the insulation material is ñve inches. bined with the other constituents in the proportions given The dielectric strength of the insulation material is illus trated by the fact that no appreciable difference exists be 55 herein of adding to the tire-resistance of the material and of adding to the roach repellency of the material, there tween the dielectric strength of air and the dielectric by increasing the over-all eñ‘iciacy of insulating material. strength of the end product insulation material at relative Chemical reactions between the various constituents humidities less than 50%. At relative humidities in the occur in the wet mixer 18. The output of the wet mixer range of 75 to 100%, lthe dielectric strength of the insula tion material is approximately two-thirds that of free air. 60 consists of a damp insulating material. This damp in sulating material is simultaneously dried and transported The drawing is a block diagram illustrating the process by which the insulating material is produced. Referring to the drawing, wood liber from a source of wood über 10 is fed to a wood fiber shredder 11. The primary constituent of the insulating material according to the invention is shredded wood über. Used newsprint furnishes a satisfactory source of such wood fiber. The newsprint is finely shredded so as to have a flour or ñuiï like consistency by the shredder 11. The huit-like shredded wood liber output of the shred to a packer 20 by means of a solids ñuidizer 21. The solids iluidizer 21 preferably utilizes air as the iluidizing agent. The dried insulating material is packed into con tainers 22 by the packer 20. Although some variation in the proportions of the various constituents may be made without having a de cisively adverse effect upon the performance of the in sulating material, the preferred embodiment of the in sulating material is produced by a process utilizing the 3,027,326 n, d previously named constituents in the following propor tions by weight: the family of dyes consisting of diamino derivatives of triphenyl methane, and water in substantially the follow ing weight ratios to each other: Parts Parts Shredded wood fiber as used newsprint ________ __ 68 Ammonium sulfate _________________________ __ 4 Shredded Wood fiber ________________________ __ 68 Boric acid (powdered 991/2% pure) ___________ __ 6.5 Ammonium Potassium alum ____________________________ __ 4 Boric acid _________________________________ __ 6.5 Brilliant Green dye _________________________ __ 4 Potassium 4 Alamask CPM_ ____________________________ __ 2 Water (liquid form) ________________________ __ 8 sulfate _________________ ___ ______ __ alum ______________ __ ____________ __ 4 Dye from the fami-1y of dyes consisting of diamino derivatives of t-riphenyl methane ____________ __ 4 thereby giving a total of 96.5 parts. The remaining 3.5 parts required to constitute 100 parts of the finished product consist of water taken in during processing in Water ____________________________________ __ 8 the form of vapor from the air. sisting of the steps of mixing together sixty-eight parts by and subsequently iluidizing the resultant material. V3. The method of producing insulating material con ' It has been found that the tire-resistant quality of the insulating material is improved by the addition of the dye and the aromatic agent over this quality in similar weight of shredded wood ñber in the form of used news print, four parts by weight of ammonium sulphate, six and onedhalf parts by weight of boric acid, four parts by weight of potassium alum, and four parts by weight of Brilliant Green dye, in substantially the given propor insulating material not so treated. Thus, there is a chemi cal co~action between the above ingredients which irn proves the nre-resistant quality, although the actual chem tions, ina dry mixer so as to produce a dry mix, trans ferring the dry mix to a wet mixer, wetting the dry mix in the wet mix by the addition of substantially ten parts ical mechanism causing this improvement is not corn pletely understood by me at this time. l claim: ' by weight water, and ñuidizing the resulting wet mix by 1. The insulation material formed by the mixing of constituents consisting essentially of shredded wood über, ammonium sulfate, boric acid, and potassium alum in substantially the following weight ratios to each other: air so as to produce a dry product. References Cited in the ñle of this patent UNITED STATES PATENTS Parts Shredded wood fiber ________________________ __ 68 Ammonium sulfate _________________________ __ 4 Boric acid _________________________________ __ 6.5 Potassium alum ______________ __ ____________ __ 4 Water ____________________________________ __ 8 and subsequently iluidizing the resultant material. 2. The insulating material formed by mixing constitu ents consisting essentially of shredded wood fiber, arn monium sulfate, boric acid, potassium alum, a dye from 30 12,594 329,973 1,911,279 2,110,470 2,120,431 2,147,793 2,470,641 Holmes _____________ __ Mar. 27, Tanczos ________ _______ Nov. 10, Hochstetter __________ __ May 30, Norton __ _____________ __ Mar. 8, Stafford _____________ __ June 14, Kropp ______________ __ Feb. 21, Portz _______________ __ May 17, 1855 1885 1933 1938 1938 1939 1949 OTHER REFERENCES “The Condensed Chemical Dictionary,” 5th ed., pp. 31 and 1121 (1956), Reinhold Pub. Corp., N_Y.