US3881975A — Polyamide hose and preparation thereof

Claim 1

Independent Claim 85 words

A PROCESS FOR THE PREPARATION OF A REINFORCED HOSE CONSTRUCTION WHICH COMPRISES CONTACTING A POLYAMIDE OR COPOLYAMIDE TUBING WITH A SOLUTION OF A SOLID ORGANIC COMPOUND IN A VOLATILE SOLVENT SAID ORGANIC COMPOUND BEING CAPABLE OF SOLVATI NG THE SURFACE OF SAID POLYAMIDE OR COPOLYAMIDE HAVING A SOLUBILITY OF AT LEAST ABOUT 20% BY WEIGHT IN SAID VOLATILE SOLVENT AND A MELTING POINT BETWEEN ABOUT 40* AND 180*C, SAID ORGANIC COMPOUND ALSO HAVING AN ACIDIC HYDROGEN ATOM AND BEING SELECTED FROM THE GROUP CONSISTING OF

Claim 2

Dependent Claim 85 words

A PROCESS FOR THE PREPARATION OF A REINFORCED HOSE CONSTRUCTION WHICH COMPRISES CONTACTING A POLYAMIDE OR COPOLYAMIDE TUBING WITH A SOLUTION OF A SOLID ORGANIC COMPOUND IN A VOLATILE SOLVENT SAID ORGANIC COMPOUND BEING CAPABLE OF SOLVATI NG THE SURFACE OF SAID POLYAMIDE OR COPOLYAMIDE HAVING A SOLUBILITY OF AT LEAST ABOUT 20% BY WEIGHT IN SAID VOLATILE SOLVENT AND A MELTING POINT BETWEEN ABOUT 40* AND 180*C, SAID ORGANIC COMPOUND ALSO HAVING AN ACIDIC HYDROGEN ATOM AND BEING SELECTED FROM THE GROUP CONSISTING OF

Claim 3

Dependent Claim 30 words

A MONO OR POLY FUNCTIONAL CARBOXYLIC ACID, SAID MONOACID HAVING UP TO EIGHT CARBON ATOMS AND SAID POLY FUNCTIONAL ACID HAVING UP TO 12 CARBON ATOMS, INCLUDING HALOGENERATED DERIVATIVES THEREOF,

Claim 4

Dependent Claim 30 words

A MONO OR POLY FUNCTIONAL CARBOXYLIC ACID, SAID MONOACID HAVING UP TO EIGHT CARBON ATOMS AND SAID POLY FUNCTIONAL ACID HAVING UP TO 12 CARBON ATOMS, INCLUDING HALOGENERATED DERIVATIVES THEREOF,

Claim 5

Dependent Claim 9 words

A MONO OR POLY FUNCTIONAL ACIDIC HYDROXYL-CONTAINING AROMATIC COMPOUND,

Claim 6

Dependent Claim 9 words

A MONO OR POLY FUNCTIONAL ACIDIC HYDROXYL-CONTAINING AROMATIC COMPOUND,

Claim 7

Dependent Claim 9 words

a mono or poly functional acidic hydroxyl-containing aromatic compound,

Claim 8

Dependent Claim 9 words

a mono or poly functional acidic hydroxyl-containing aromatic compound,

Claim 9

Dependent Claim 50 words

A process according to claim 1 wherein the aforesaid carboxylic acids are selected from the group consisting of oxalic acid malonic acid glutaric acid benzoic acid crotonic acid mandelic acid tartaric acid naphthalene acetic acid trichloroacetic acid sebacic acid, adipic acid dodecanedioic acid and mixtures thereof, including halogenated derivatives thereof.

Claim 10

Dependent Claim 16 words

A process according to claim 2 wherein the carboxylic acid is benzoic acid or oxalic acid.

Claim 11

Dependent Claim 5 words

a non-carboxylic aromatic acid, and

Claim 12

Dependent Claim 5 words

a non-carboxylic aromatic acid, and

Claim 13

Dependent Claim 5 words

A NON-CARBOXYLIC AROMATIC ACID, AND

Claim 14

Dependent Claim 5 words

A NON-CARBOXYLIC AROMATIC ACID, AND

Claim 15

Dependent Claim 54 words

MIXTURES OF THE AFORESAID MATERIALS, INCLUDING A MIXTURE CONTAINING RESORCINAL, FORMING CRYSTALS OF SAID ORGANIC COMPOUND ON SAID TUBING BY DRYING SAID VOLATILE SOLVENT, REINFORCING SAID TUBING WITH AT LEAST ONE LAYER OF A SYNTTHETIC OR NATURAL FIBER AND THEN SUBJECTING THE REINFORCED TUBING THUS OBTAINED TO A TEMPERATURE OF AT LEAST ABOUT 150*F.

Claim 16

Dependent Claim 54 words

MIXTURES OF THE AFORESAID MATERIALS, INCLUDING A MIXTURE CONTAINING RESORCINAL, FORMING CRYSTALS OF SAID ORGANIC COMPOUND ON SAID TUBING BY DRYING SAID VOLATILE SOLVENT, REINFORCING SAID TUBING WITH AT LEAST ONE LAYER OF A SYNTTHETIC OR NATURAL FIBER AND THEN SUBJECTING THE REINFORCED TUBING THUS OBTAINED TO A TEMPERATURE OF AT LEAST ABOUT 150*F.

Claim 17

Dependent Claim 55 words

mixtures of the aforesaid materials, including a mixture containing resorcinol, forming crystals of said organic compound on said tubing by drying saId volatile solvent, reinforcing said tubing with at least one layer of a synthetic or natural fiber and then subjecting the reinforced tubing thus obtained to a temperature of at least about 150* F.

Claim 18

Dependent Claim 55 words

mixtures of the aforesaid materials, including a mixture containing resorcinol, forming crystals of said organic compound on said tubing by drying saId volatile solvent, reinforcing said tubing with at least one layer of a synthetic or natural fiber and then subjecting the reinforced tubing thus obtained to a temperature of at least about 150* F.

Claim 19

Dependent Claim 54 words

A process according to claim 1 wherein the hydroxyl-containing aromatic compound is selected from the group consisting of catechol hydroquinone Alpha -naphthol naphtho-resorcinol a lower alkoxy phenol, said alkoxy group containing from one to four carbon atoms, 3,5-xylenol p-chlorophenol and p-bromophenol including mixtures thereof and also including mixtures of resorcinol with the aforesaid substances.

Claim 20

Dependent Claim 18 words

A process according to claim 4 wherein the aforesaid hydroxy-containing aromatic compound is naphtho resorcinol or Alpha -naphthol.

Claim 21

Dependent Claim 31 words

A process according to claim 1 wherein the non-carboxylic aromatic acid is selected from the group consisting of benzene sulfonic acid, naphthalene sulfonic acid or o-, m- or p-toluene sulfonic acid.

Claim 22

Dependent Claim 14 words

A process according to claim 6 wherein said non-carboxylic acid is naphthalene sulfonic acid.

Claim 23

Dependent Claim 17 words

A process according to claim 1 wherein the aforesaid solution is an aqueous or an alcoholic solution.

Claim 24

Dependent Claim 20 words

A process according to claim 8 wherein the alcoholic solution is an alkanol containing from one to four carbon atoms.

Claim 25

Dependent Claim 25 words

A process according to claim 9 wherein the alcohol is methanol or ethanol in an amount equal to about 50% by weight of the solution.

Claim 26

Dependent Claim 15 words

A process according to claim 8 wherein the tubing treated with said solution is dried.

Claim 27

Dependent Claim 29 words

A process according to claim 1 wherein the polyamide is a member selected from the group consisting of nylon 6, nylon 11, nylon 12, nylon 66 and copolymers thereof.

Claim 28

Dependent Claim 15 words

A process according to claim 12 wherein the polyamide is nylon 11 or nylon 12.

Claim 29

Dependent Claim 33 words

A process according to claim 1 wherein the natural fiber is cotton and the synthetic fiber is selected from the group consisting of nylon 6, nylon 66, a poly (ethylene terephthalate) and rayon.

Claim 30

Dependent Claim 55 words

A process according to claim 1 wherein the polyamide or copolyamide tubing is treated with an alkanol containing from 1 to 4 carbon atoms prior to contacting with a solution containing a member selected from the group consisting of naphthalene sulfonic acid, benzoic acid, oxalic acid, glutaric acid and mixtures thereof including mixtures containing resorcinol.

Claim 31

Dependent Claim 77 words

A process according to claim 1 wherein the reinforced product thus obtained is contacted with a solution or a particulate form of a member selected from the group consisting of naphthalene sulfonic acid, benzoic acid, oxalic acid, glutaric acid and mixtures thereof including mixtures containing resorcinol, followed by applying at least one additional coating of a synthetic or natural fiber reinforcing material and then subjecting the resulting assembly to a temperature of at least about 150* F.

Claim 32

Dependent Claim 30 words

A process according to claim 16 wherein said additional layer is applied to said reinforced product by wrapping, braiding or helically winding said layer around or on said reinforced product.

Claim 33

Dependent Claim 69 words

A process according to claim 1 which comprises contacting the single or multi-layered reinforced tubing with a solution or a particulate form of naphthalene sulfonic acid, benzoic acid, oxalic acid, glutaric acid, and mixtures thereof including mixtures with resorcinol, applying thereon a covering selected fRom the group consisting of a polyamide, copolyamide or neoprene followed by heating the resulting assembly at a temperature in excess of about 150* F.

Claim 34

Dependent Claim 30 words

A process according to claim 18 wherein said additional layer is applied to said reinforced product by wrapping, braiding or helically winding said layer around or on said reinforced product.

Claim 35

Dependent Claim 34 words

A process according to claim 1 wherein the layer of said synthetic or natural fiber is applied to said tubing by wrapping, braiding or helically winding the aforesaid fiber on or around said tubing.

Claim 36

Dependent Claim 90 words

A process for preparing a reinforced hose which comprises providing a mixture of a polyamide or copolyamide and an organic compound selected from the group consisting of naphthalene sulfonic acid, benzoic acid, oxalic acid, glutaric acid and mixtures thereof including mixtures containing resorcinol, extruding said mixture to cover a polyamide or copolyamide tubing with a thin coating of said mixture, reinforcing said coated tubing with at least one layer of a synthetic or natural fiber and then subjecting the resulting assembly to a temperature of at least about 150* F.

Claim 37

Dependent Claim 90 words

A process for preparing a reinforced hose which comprises providing a mixture of a polyamide or copolyamide and an organic compound selected from the group consisting of naphthalene sulfonic acid, benzoic acid, oxalic acid, glutaric acid and mixtures thereof including mixtures containing resorcinol, extruding said mixture to cover a polyamide or copolyamide tubing with a thin coating of said mixture, reinforcing said coated tubing with at least one layer of a synthetic or natural fiber and then subjecting the resulting assembly to a temperature of at least about 150* F.

Claim 38

Dependent Claim 82 words

A process according to claim 21 wherein the reinforced product thus obtained is contacted with a coating comprising an extruded product of a polyamide or copolyamide and a solution or a particulate form of naphthalene sulfonic acid, benzoic acid, oxalic acid, glutaric acid, and mixtures thereof including mixtures with resorcinol, followed by applying thereon at least one additional layer of a synthetic or natural fiber reinforcing material and then subjecting the resulting assembly to a temperature of at least about 150* F.

Claim 39

Dependent Claim 30 words

A process according to claim 22 wherein said additional layer is applied to said reinforced product by wrapping, braiding or helically winding said layer around or on said reinforced product.

Claim 40

Dependent Claim 86 words

A process according to claim 21 which comprises contacting a single or multi-layered reinforced tubing with a coating comprising an extruded product of a polyamide or a copolyamide and a solution or a particulate form of naphthalene sulfonic acid, benzoic acid, oxalic acid, glutaric acid and mixtures thereof, including mixtures with resorcinol, applying a covering selected from the group consisting of a polyamide, copolyamide and a neoprene onto said reinforced tubing followed by heating the resulting assembly at a temperature in excess of about 150* F.

Claim 41

Dependent Claim 30 words

A process according to claim 24 wherein said additional layer is applied to said reinforced product by wrapping, braiding or helically winding said layer around or on said reinforced product.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-05-05	1978-11-04	1979-05-06	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-05-05	1982-11-04	1983-05-06	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-05-05	1986-11-04	1987-05-06	$7700.00	Window Closed / Lapsed

Polyamide hose and preparation thereof

Abstract

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