US665968A - Devulcanizing-bath. - Google Patents

Devulcanizing-bath. Download PDF

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Publication number
US665968A
US665968A US3342200A US1900033422A US665968A US 665968 A US665968 A US 665968A US 3342200 A US3342200 A US 3342200A US 1900033422 A US1900033422 A US 1900033422A US 665968 A US665968 A US 665968A
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Prior art keywords
bath
rubber
devulcanizing
pounds
ounces
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Expired - Lifetime
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US3342200A
Inventor
John Murphy
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AMADEE SPADONE
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AMADEE SPADONE
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Priority to US3342200A priority Critical patent/US665968A/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
    • C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
    • C08J11/26—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing carboxylic acid groups, their anhydrides or esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • C08J11/16—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with inorganic material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2321/00—Characterised by the use of unspecified rubbers

Definitions

  • the object of the present invention is to produce a devulcanizing-bath for caoutchouc, india-rubber, and similar materials; and it consists in a bath containing a desulfurizing and a deoxidizing agent, which bath may be employed as a devulcanizing-bath for vulcanized india-rubber, &c., and when so used the desulfurizing agent acts upon the sulfur in the vulcanized rubber to effect devulcanization and the deoxidizing agent acts upon the portions of the rubber which have become oxidized in order to abstract oxygen therefrom.
  • baths embodying my invention To five pounds of vulcanized rubber I employ one pound of a solution of carbonate of soda and two ounces of gallic acid. The vulcanized rubber is treated in this bath for twenty hours at a temperature of 320 Fahrenheit. This bath is effective to effect devulcanization of the rubber by acting upon the sulfur contained therein and proportions of the rubber which are oxidized.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Cosmetics (AREA)

Description

UNITED STATES PATENT OFFICE.
JOHN MURPHY, OF NEW YORK, N. Y ASSIGNOR TO A'MADEE SPADONE, OF SAME PLACE.
DEVULCANIZING-BATH.
SPECIFIUATION forming part of Letters Patent No. 665,968, dated January 15, 1901.
Application filed October 18, 1900- Serial No. 33,422. (No specimens.)
To all whom it may concern.-
Be it known that 1, JOHN MURPHY, a citizen of the United States, residing in the city of New York, borough of Brooklyn, county of Kings, State of New York, have invented a new and Improved Devulcanizing-Bath, of which the following is a specification.
The object of the present invention is to produce a devulcanizing-bath for caoutchouc, india-rubber, and similar materials; and it consists in a bath containing a desulfurizing and a deoxidizing agent, which bath may be employed as a devulcanizing-bath for vulcanized india-rubber, &c., and when so used the desulfurizing agent acts upon the sulfur in the vulcanized rubber to effect devulcanization and the deoxidizing agent acts upon the portions of the rubber which have become oxidized in order to abstract oxygen therefrom.
The following are examples of baths embodying my invention: To five pounds of vulcanized rubber I employ one pound of a solution of carbonate of soda and two ounces of gallic acid. The vulcanized rubber is treated in this bath for twenty hours at a temperature of 320 Fahrenheit. This bath is effective to effect devulcanization of the rubber by acting upon the sulfur contained therein and proportions of the rubber which are oxidized.
In lieu of the bath and procedure mentioned the following may be employed accord ing to my invention:
First. Sulfid of sodium, one pound; rubher, four pounds; gallic acid, two ounces.
Second. Phosphate of soda, one pound; rubber, four pounds; gallic acid, two ounces.
Third. Carbonate of soda, one and one-half pounds; rubber, five pounds; pyrogallic acid, two ounces.
Fourth. Carbonate of soda, one and onehalf pounds; rubber, five pounds; eikonogen, two ounces.
Fifth. Carbonate of soda, one and one-half pounds; rubber, five pounds; hydrochinon, two ounces.
The quantities above mentioned may of course be increased.
Having described myinvention, what I claim, and desire to secure by Letters Patent, is-
l. The bath for devulcanizing caoutchouc, india-rubber, &c., consisting of adesnlfuriz ing agent capableof acting upon the combined sulfur of the mass and a separate deoxidizing agent.
2. The bath fordevulcanizing caoutchouc, india-rubber,'&c., consisting of carbonate of soda and gallic acid.
JOHN MURPHY.
Witnesses:
GEO. E. MoRsE, OTTO v. SCHRENK.
US3342200A 1900-10-18 1900-10-18 Devulcanizing-bath. Expired - Lifetime US665968A (en)

Priority Applications (1)

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US3342200A US665968A (en) 1900-10-18 1900-10-18 Devulcanizing-bath.

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US3342200A US665968A (en) 1900-10-18 1900-10-18 Devulcanizing-bath.

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