US1765312A - Insulating materials and process of manufacture of same - Google Patents

Insulating materials and process of manufacture of same Download PDF

Info

Publication number
US1765312A
US1765312A US21725A US2172525A US1765312A US 1765312 A US1765312 A US 1765312A US 21725 A US21725 A US 21725A US 2172525 A US2172525 A US 2172525A US 1765312 A US1765312 A US 1765312A
Authority
US
United States
Prior art keywords
block
manufacture
solution
sodium silicate
same
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US21725A
Inventor
Walter L Steffens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip Carey Manufacturing Co
Original Assignee
Philip Carey Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philip Carey Manufacturing Co filed Critical Philip Carey Manufacturing Co
Priority to US21725A priority Critical patent/US1765312A/en
Application granted granted Critical
Publication of US1765312A publication Critical patent/US1765312A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/10Lime cements or magnesium oxide cements
    • C04B28/105Magnesium oxide or magnesium carbonate cements

Definitions

  • My improved insulating material has a low rate of heat transmission, has high insulating value, is mechanically strong, is
  • I first mould a block composed of a major proportion of carbonate of magnesia, preferably about and a minor proportion of asbestos. This block is dried. After drying it is heat treated to shrink same and is then milled to form and size.
  • a comparatively high temperature i.'e., 750 to 800 degrees F.
  • I have found it desirable to subject it to heat treatment at a temperature approximately the temperature to which it is to be subjected in use.
  • form I preferably treat it to a solution of sodium silicate by dipping it ina bath so as to impregnate it with the sodium silicate.
  • the preferred impregnating solution to obtain the result desired is a solution consisting of six (6) parts of water to one (1) part 40 B. sodium silicate.
  • Such a solution enables me to by treating the carbonate magnesia asbestos block for a period of about one and one half minutes to impregnate a block of about 1 to 2 inches thick with the requisite amount of sodium silicate so as to Application filed April 8, 1925. Serial No. 21.725.
  • a solution containing appreciably more sodium silicate and less water or more water and less sodium silicate would not give the proper impregnation.
  • Insulating material differs in thickness due to the purpose for which it is to be used and I have found that to get a satisfactory impregnation it is preferable to treat the material if 1 inch thick to the impregnation treatment for about 1 minute, if 1 inches or 2 inches thick I treat it for a minute and a half and greater thicknesses in like proportions.
  • the blocks are air dried at normal room tem erature and then they are subjected to furt er drying in a heated room. I have found that this method of drying after impregnation enables me to make the material without danger of warp ing as generally occurs Where it is immediately submitted to the action of heat before the excess moisture has dried out.
  • the order of treatment after moulding and drying the block may be varied by either heat treating, milling and then impregnating, or b heat treating, impregnating and then milhng, or by any variation in'the order of the three steps of heat treating, milling and impregnating, without departing from my invention.
  • insulating mate rial the process which comprises forming a block composed of a major pro rtion of magnesia and a minor proportion 0 a suitable fibrous binder, and sub]ecting the block'to the action of an aqueous solution of sodium silicate containing six (6) and one 1) part of sodium silicate, the duration of the treatment being such that said block is completely impregnated with said solution and thereafter hardened substantially throughout.
  • the process which comprises forming a blockcomposed of a major proportion of magnesia and a minor proportion of a suitable fibrous binder, soaln'ng the block with an aqueous solution of sodium silicate for at least one minute in the case of a block one inch thick and prolonging the soaking in the case of blocks of greater thickness for at least one-half minute for each inch of thickness or fraction thereof in excess of one inch, the fluidity and stren h of said solution being such that said b ock is completely impregnated with said solution and thereafter hardened substantially throughout.
  • ,block composed of a major proportion of magnesia and a minor proportion of a suitable fibrous binder, drying said block, milling said block, soaking said block with an aqueous solution of sodium silicate, air drying said block, and then heat treating the same, the fluidity and strength of said solution and the duration of the soaking being such that said block is completely impregnated, and the temperature of said heat treatment being at least as great as that to which said block will be s'ub ected in actual use.

Description

Patented June 17, 1930 UNITED", STATES PATENT OFFICE WALTER L. STEFFENS, OF WYOMING, OHIO, ASSIGNOR'TO THE PHILIP CAREY MANU- FACTURING COMPANY, CORPORATION OF OHIO D INSULATING MATERIALS AN D PROCESS OF MANUFACTURE OF SAME No Drawing.
factory for'insulating material as has heretofore occurred when what is commonly known as 85% magnesia covering has been used. My improved insulating material has a low rate of heat transmission, has high insulating value, is mechanically strong, is
light in weight, and when manufactured has a non-powderin refractory surface and can be manufactured at a comparatively low cost. In the preferred process of manufacture of my insulating material I first mould a block composed of a major proportion of carbonate of magnesia, preferably about and a minor proportion of asbestos. This block is dried. After drying it is heat treated to shrink same and is then milled to form and size. For some purposes when the material is to be used on surfaces where it willbe subjected to. a comparatively high temperature i.'e., 750 to 800 degrees F., I have found it desirable to subject it to heat treatment at a temperature approximately the temperature to which it is to be subjected in use. When this block has been formed to desired'size and. form I preferably treat it to a solution of sodium silicate by dipping it ina bath so as to impregnate it with the sodium silicate. The preferred impregnating solution to obtain the result desired is a solution consisting of six (6) parts of water to one (1) part 40 B. sodium silicate. Such a solution enables me to by treating the carbonate magnesia asbestos block for a period of about one and one half minutes to impregnate a block of about 1 to 2 inches thick with the requisite amount of sodium silicate so as to Application filed April 8, 1925. Serial No. 21.725.
form an insulating material of desired strength and other qualities set forth above. I
A solution containing appreciably more sodium silicate and less water or more water and less sodium silicate would not give the proper impregnation. By this I do not mean that the solution could not be varied slightly as to the relative quantities but no latitude can be allowed'beyond the limits of the formula stated. Insulating material differs in thickness due to the purpose for which it is to be used and I have found that to get a satisfactory impregnation it is preferable to treat the material if 1 inch thick to the impregnation treatment for about 1 minute, if 1 inches or 2 inches thick I treat it for a minute and a half and greater thicknesses in like proportions. After the sodium silicate treatment the blocks are air dried at normal room tem erature and then they are subjected to furt er drying in a heated room. I have found that this method of drying after impregnation enables me to make the material without danger of warp ing as generally occurs Where it is immediately submitted to the action of heat before the excess moisture has dried out. In the process of manufacture of my insulation material the order of treatment after moulding and drying the block may be varied by either heat treating, milling and then impregnating, or b heat treating, impregnating and then milhng, or by any variation in'the order of the three steps of heat treating, milling and impregnating, without departing from my invention. Wherever in the speci cation or claims I have used the expression block ll would have it understood as meaning a piece of insulating material, whether in the form of a cylindrical pipe covering, a fitting for a valve, what is known as lagging or whatever other form of moulded insulating material.
Claims- 1. In the manufacture of insulating mate-' eat um silicate, the fluidity and strength of the solution and the duration of the treatment being such that the block is completely 1m: regnated with said solution and thereafter hardened substantially throughout.
2. In the manufacture of insulating mate rial, the process which comprises forming a block composed of a major pro rtion of magnesia and a minor proportion 0 a suitable fibrous binder, and sub]ecting the block'to the action of an aqueous solution of sodium silicate containing six (6) and one 1) part of sodium silicate, the duration of the treatment being such that said block is completely impregnated with said solution and thereafter hardened substantially throughout.
3. In the manufacture of insulating material, the process which comprises forming a blockcomposed of a major proportion of magnesia and a minor proportion of a suitable fibrous binder, soaln'ng the block with an aqueous solution of sodium silicate for at least one minute in the case of a block one inch thick and prolonging the soaking in the case of blocks of greater thickness for at least one-half minute for each inch of thickness or fraction thereof in excess of one inch, the fluidity and stren h of said solution being such that said b ock is completely impregnated with said solution and thereafter hardened substantially throughout.
4. In the manufacture of insulating material, the process which comprises forming a.
,block composed of a major proportion of magnesia and a minor proportion of a suitable fibrous binder, drying said block, milling said block, soaking said block with an aqueous solution of sodium silicate, air drying said block, and then heat treating the same, the fluidity and strength of said solution and the duration of the soaking being such that said block is completely impregnated, and the temperature of said heat treatment being at least as great as that to which said block will be s'ub ected in actual use.
5. In the manufacture of insulating material, the process which comprises forming a block com osed of approximately eighty-five per cent 85%) of magnesia and approximately fifteen per cent (15%) of asbestos, drying said block, milling said block, soakmg said block with an aqueous solution of sodium silicate containing six (6) parts of water and one (1) part of sodium silicate, such soaking being continued for at least one minute in the case of a block one inch thick and bemg prolonged, in the case of blocks of greater thickness, for at least one-half minute for each inch of thickness or fraction thereof in excess of one inch, then air drying sa d block and heat treating the same at 'a temperature between 500 and 800 F., the fluidity and strength of said'solution and the duration of the treatment with said solution parts of water
US21725A 1925-04-08 1925-04-08 Insulating materials and process of manufacture of same Expired - Lifetime US1765312A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US21725A US1765312A (en) 1925-04-08 1925-04-08 Insulating materials and process of manufacture of same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21725A US1765312A (en) 1925-04-08 1925-04-08 Insulating materials and process of manufacture of same

Publications (1)

Publication Number Publication Date
US1765312A true US1765312A (en) 1930-06-17

Family

ID=21805792

Family Applications (1)

Application Number Title Priority Date Filing Date
US21725A Expired - Lifetime US1765312A (en) 1925-04-08 1925-04-08 Insulating materials and process of manufacture of same

Country Status (1)

Country Link
US (1) US1765312A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596285A (en) * 1949-09-15 1952-05-13 Petcar Res Corp Method of forming beaded structure
US2804398A (en) * 1954-11-22 1957-08-27 Southwestern Petroleum Co Inc Method of preserving and fireproofing a structural member and resultant article
US3932161A (en) * 1970-12-04 1976-01-13 Mcnish Thomas Gordon Fibrous insulating materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596285A (en) * 1949-09-15 1952-05-13 Petcar Res Corp Method of forming beaded structure
US2804398A (en) * 1954-11-22 1957-08-27 Southwestern Petroleum Co Inc Method of preserving and fireproofing a structural member and resultant article
US3932161A (en) * 1970-12-04 1976-01-13 Mcnish Thomas Gordon Fibrous insulating materials

Similar Documents

Publication Publication Date Title
US2738285A (en) Reinforced cement products and method of making the same
US2773764A (en) Mineral fiber product
US1765312A (en) Insulating materials and process of manufacture of same
US3232782A (en) High temperature resistant vitreous material and method of producing same
US2702761A (en) Method of impregnating fiber insulation board
US2047016A (en) Alkali silicate heat and sound insulating composition
US2034522A (en) Fireproof building material
US1738976A (en) Process for fireproofing cellulose
US1856475A (en) Metal impregnated fiber article and process of making same
US2046494A (en) Heat insulating and fireproof materials
US2690100A (en) Method of producing fire-resistant inorganic fiber insulation
US1941769A (en) Impregnated fibrous block
US2718475A (en) Electrical insulating material comprising sheet asbestos and method of making
US2541273A (en) Support for high resistance electrical conductors and method of making the same
US1780623A (en) Process for manufacturing building material of varying densities
US3053727A (en) Mounting for electrical resistance elements and method for preparing the same
US1819344A (en) Brake lining and method of making the same
US2017344A (en) Fireproof heat and sound insulating body
DE19709405B4 (en) Heat insulating material and method for its production
KR101163121B1 (en) The manufacturing incombustibility construction materials and incombustibility construction materials
DE2060687C3 (en) Process for the production of a shaped body
US1982542A (en) Treated fibrous material and process of making the same
DE2344072C3 (en) Fire- and weather-resistant coated asbestos-cement base plate for the application of plaster or decorative layers and processes for their production
US1453726A (en) Insulating composition and method of making same
EP0472953B1 (en) Process for the manufacture of insulating material and insulating material