US3879302A — Fluorocarbon-based sealing compound

Claim 1

Independent Claim 145 words

A SEALING COMPOUND FOR THREADED PIPE JOINTS AND THE LIKEM THE COMPOUND BEING INTIALLY FLOWABLE BUT BEING CONVERTED INTO A PUTTY-LIKE MASS HAVING PACKING AND LUBRICATING PROPERTIES WHEN SUBJECTED TO SHEAR FORCES, SAID COMPOUND COMPRISING INERT MINERAL FILLER PARTICLES IN AN AMOUNT SUFFICIENT TO PROVIDE VIRTUALLY NO COLD FLOW OF SAID COMPOUND AND A FREEZETHAW STABILIZED AQUEOUS DISPERSION OF A MAJOR AMOUNT OF TETRAFLUORETHYLENE POWDERS ENVELOPED BY A STABILIZING AGENT CONSTITUTED BY A SILICON COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILLANES AND SILIZANES IN AN AMOUNT NOT IN EXCESS OF PART FREEZE-THAW CHARACTERISTICS THERETO THAT PREVENT CLUMPING OF THE POWDERS, SAID FILLER PATICLES BEING INTERMINGLED WITH SAID DISPERSION WHEREBY WHEN THE COMPOUND IS SUBJECTED TO SHEAR FORCES THAT CAUSE THE FILLER PATICLES TO SCRUB OFF THE AGENT FROMM THE POWEDERS, THE POWDERS THEN CLUMP AND BIND THE FILLER PARTICLES TO FORM SAID PUTTY-LIKE MASS.

Claim 2

Dependent Claim 145 words

A SEALING COMPOUND FOR THREADED PIPE JOINTS AND THE LIKEM THE COMPOUND BEING INTIALLY FLOWABLE BUT BEING CONVERTED INTO A PUTTY-LIKE MASS HAVING PACKING AND LUBRICATING PROPERTIES WHEN SUBJECTED TO SHEAR FORCES, SAID COMPOUND COMPRISING INERT MINERAL FILLER PARTICLES IN AN AMOUNT SUFFICIENT TO PROVIDE VIRTUALLY NO COLD FLOW OF SAID COMPOUND AND A FREEZETHAW STABILIZED AQUEOUS DISPERSION OF A MAJOR AMOUNT OF TETRAFLUORETHYLENE POWDERS ENVELOPED BY A STABILIZING AGENT CONSTITUTED BY A SILICON COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILLANES AND SILIZANES IN AN AMOUNT NOT IN EXCESS OF PART FREEZE-THAW CHARACTERISTICS THERETO THAT PREVENT CLUMPING OF THE POWDERS, SAID FILLER PATICLES BEING INTERMINGLED WITH SAID DISPERSION WHEREBY WHEN THE COMPOUND IS SUBJECTED TO SHEAR FORCES THAT CAUSE THE FILLER PATICLES TO SCRUB OFF THE AGENT FROMM THE POWEDERS, THE POWDERS THEN CLUMP AND BIND THE FILLER PARTICLES TO FORM SAID PUTTY-LIKE MASS.

Claim 3

Dependent Claim 155 words

A sealing compound for threaded pipe joints and the like, the compound being initially flowable but being converted into a putty-like mass having packing and lubricating properties when subjected to shear forces, said compound comprising inert mineral filler particles in an amount sufficient to provide virtually no cold flow of said compound and a freeze-thaw stabilized aqueous dispersion of a major amount of tetrafluoroethylene powders enveloped by a stabilizing agent constituted by a silicon compound selected from the group consisting of silanes and silizanes in an amount not in excess of about 10 percent by volume relative to the dispersion to impart freeze-thaw characteristics thereto that prevent clumping of the powders, said filler particles being intermingled with said dispersion whereby when the compound is subjected to shear forces that cause the filler particles to scrub off the agent from the powders, the powders then clump and bind the filler particles to form said putty-like mass.

Claim 4

Dependent Claim 155 words

A sealing compound for threaded pipe joints and the like, the compound being initially flowable but being converted into a putty-like mass having packing and lubricating properties when subjected to shear forces, said compound comprising inert mineral filler particles in an amount sufficient to provide virtually no cold flow of said compound and a freeze-thaw stabilized aqueous dispersion of a major amount of tetrafluoroethylene powders enveloped by a stabilizing agent constituted by a silicon compound selected from the group consisting of silanes and silizanes in an amount not in excess of about 10 percent by volume relative to the dispersion to impart freeze-thaw characteristics thereto that prevent clumping of the powders, said filler particles being intermingled with said dispersion whereby when the compound is subjected to shear forces that cause the filler particles to scrub off the agent from the powders, the powders then clump and bind the filler particles to form said putty-like mass.

Claim 5

Dependent Claim 20 words

A compound as set forth in claim 1, wherein the size of said powders is no greater than one micron.

Claim 6

Dependent Claim 15 words

A sealing compound as set forth in claim 1, wherein said agent is a silane.

Claim 7

Dependent Claim 14 words

A compound as set forth in claim 1, wherein said filler includes plate-like particles.

Claim 8

Dependent Claim 15 words

A compound as set forth in claim 4, wherein said plate-like particles are mica particles.

Claim 9

Dependent Claim 14 words

A compound as set forth in claim 4, wherein said filler includes needle-like particles.

Claim 10

Dependent Claim 16 words

A compound as set forth in claim 6, wherein said needle-like particles are formed by attapulgite.

Claim 11

Dependent Claim 14 words

A compound as set forth in claim 1, wherein said filler particles are water-repellent.

Claim 12

Dependent Claim 128 words

A sealing compound for threaded pipe joints and the like, said compound being initially flowable but being converted into a putty-like mass having packing and lubricating properties when subjected to shear forces, said compound comprising in an amount sufficient to provide virtually no cold flow of said compound an inert water-repellent mineral filler formed by a mixture of plate-like and needle1like particles, said filler particles being intermingled with an aqueous dispersion of tetrafluoroethylene powders coated with a stabilizing agent in the form of a silane in a relative amount that prevents clumping of the powders whereby when the compound is subjected to shear forces that cause the filler particles to scrub off the agent, the powders then clump and bind the filler particles to form said putty-like mass.

Claim 13

Dependent Claim 128 words

A sealing compound for threaded pipe joints and the like, said compound being initially flowable but being converted into a putty-like mass having packing and lubricating properties when subjected to shear forces, said compound comprising in an amount sufficient to provide virtually no cold flow of said compound an inert water-repellent mineral filler formed by a mixture of plate-like and needle1like particles, said filler particles being intermingled with an aqueous dispersion of tetrafluoroethylene powders coated with a stabilizing agent in the form of a silane in a relative amount that prevents clumping of the powders whereby when the compound is subjected to shear forces that cause the filler particles to scrub off the agent, the powders then clump and bind the filler particles to form said putty-like mass.

Claim 14

Dependent Claim 106 words

In a method of a forming a sealing compound comprising a water-repellent mineral filler and an aqueous-tetrafluoroethylene dispersion, said filler rendered water-repellent by treatment with a silicon agent, the improvement comprising: A. adding a stabilizing agent selected from the group consisting of silanes and silizanes to an aqueous dispersion of a major amount of a tetrafluoroethylene powder in an amount sufficient to render said dispersion freeze - thaw stable and B. gently intermingling the treated fillEr particles with the stable dispersion to form said compound in flowable form, whereby said compound, when subjected to shear forces, converts into a putty-like mass having packing and lubricating characteristics.

Claim 15

Dependent Claim 106 words

In a method of a forming a sealing compound comprising a water-repellent mineral filler and an aqueous-tetrafluoroethylene dispersion, said filler rendered water-repellent by treatment with a silicon agent, the improvement comprising: A. adding a stabilizing agent selected from the group consisting of silanes and silizanes to an aqueous dispersion of a major amount of a tetrafluoroethylene powder in an amount sufficient to render said dispersion freeze - thaw stable and B. gently intermingling the treated fillEr particles with the stable dispersion to form said compound in flowable form, whereby said compound, when subjected to shear forces, converts into a putty-like mass having packing and lubricating characteristics.

Claim 16

Dependent Claim 23 words

The method as set forth in claim 10 further including the improvement of freezing and thawing the flowable compound to enhance its viscosity.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-04-21	1978-10-21	1979-04-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-04-21	1982-10-21	1983-04-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-04-21	1986-10-21	1987-04-22	$7700.00	Window Closed / Lapsed

Fluorocarbon-based sealing compound

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