US3047526A - Leather-coating composition - Google Patents
Leather-coating composition Download PDFInfo
- Publication number
- US3047526A US3047526A US859830A US85983059A US3047526A US 3047526 A US3047526 A US 3047526A US 859830 A US859830 A US 859830A US 85983059 A US85983059 A US 85983059A US 3047526 A US3047526 A US 3047526A
- Authority
- US
- United States
- Prior art keywords
- leather
- lubricant
- coating composition
- elastomer
- coating
- 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
Links
- 239000008199 coating composition Substances 0.000 title claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 13
- 239000000806 elastomer Substances 0.000 claims description 12
- 239000011877 solvent mixture Substances 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 3
- 239000010985 leather Substances 0.000 description 29
- 239000000314 lubricant Substances 0.000 description 13
- 238000007789 sealing Methods 0.000 description 13
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 239000000203 mixture Substances 0.000 description 10
- 229920001084 poly(chloroprene) Polymers 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 239000010439 graphite Substances 0.000 description 8
- 229910002804 graphite Inorganic materials 0.000 description 8
- 238000000576 coating method Methods 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000010445 mica Substances 0.000 description 5
- 229910052618 mica group Inorganic materials 0.000 description 5
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 5
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 5
- 239000000454 talc Substances 0.000 description 5
- 229910052623 talc Inorganic materials 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229940032007 methylethyl ketone Drugs 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 3
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 3
- 229920002681 hypalon Polymers 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 3
- DNJRKFKAFWSXSE-UHFFFAOYSA-N 1-chloro-2-ethenoxyethane Chemical compound ClCCOC=C DNJRKFKAFWSXSE-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 235000006708 antioxidants Nutrition 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000003849 aromatic solvent Substances 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920005559 polyacrylic rubber Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 229960001124 trientine Drugs 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C11/00—Surface finishing of leather
- C14C11/003—Surface finishing of leather using macromolecular compounds
Definitions
- This invention relates to a novel composition of matter used to coat the leather element in shaft and rod seals.
- This application is a division of our application Serial No. 713,024, filed February 3, 1958, now U.S. Patent No. 2,983,131, which in turn is a division of our application Serial Number 540,104, filed October 12, 1955, now U.S. Patent No. 2,854,267, which was a continuation-in-part of our application Serial Number 519,862, filed July 5, 1955 now abandoned.
- leather has long been favored as far superior to most materials as a pliant sealing element for shafts, reciprocating rods and the like. Despite this, it is recognized that leather has certain disadvantages and fails to exhibit, to the degree desired, all the characteristics needed to meet the ever increasing requirements for a satisfactory seal. For example, leather varies Widely in density, resilience, porosity and flexibility, all of which affect performance and suitability for use as sealing elements. Accordingly, over the years much effort has been directed toward improved processing procedures in an endeavor to provide a product of more uniform properties and longer service life. In addition, these attempts have included the augmentation of existing properties as well as the inclusion of new ones.
- Another facet of the problem derives from the fact that certain desired properties of leather are customarily found only in combination with undesirable ones.
- a leather having the desired flexibility is too soft to maintain good sealing contact with an eccentrically rotating shaft, or one which vibrates or whips as it rotates.
- a flexible leather usually is quite porous. In consequence, it has a high reservoir capacity for lubricantan advantageous quality. But this porosity is also attended by seepage of lubricant through the side Walls of 'the leathera highly undesirable quality. Previous efforts to seal the pores have destroyed the leathers capacity for storing lubricant and have stiffened the leather vobjectionably.
- the invention provides a thin film or veneer of a special elastomer bonded to one or more surfaces of the leather. If. only one surface of the leather member is to be coated, it is preferable to coat the hair side rather than the opposite flesh side and, in a shaft seal, to so mount the seal in the housing bore that the elastomeric veneer is in contact with the shaft and is remote from the interior of the housing.
- the principal functional ingredients of the veneer are a synthetic oil-resistant elastomer such as neoprene, a polyacrylic, a nitrile, or a chlorosulfonated polyethylene rubber having a suitable dry lubricant dispersed therein, such as graphite, molybdenum disulfide, mica or talc.
- a synthetic oil-resistant elastomer such as neoprene, a polyacrylic, a nitrile, or a chlorosulfonated polyethylene rubber having a suitable dry lubricant dispersed therein, such as graphite, molybdenum disulfide, mica or talc.
- the elastomer does not penetrate beyond the base of the hair pore openings or of the surface crevices and other imperfections of the leather.
- This confinement of the veneer to the immediate surface area of the leather and its absence from the many voids in the body of the leather is highly important and has several advantages.
- the absence of elastomer from the interior body of the leather permits of a free and natural capillary flow of lubricant within the leather in a path generally parallel to the inner and outer surfaces.
- the many voids naturally present in the leather are available as lubricant storage reservoirs.
- the inherent flexibility of the body of the leather is not adversely affected by the presence of incompressible particles filling the voids.
- the exterior surface of the leather or the one in contact with the rotating shaft is sealed by a thin film of resilient material which is highly resistant to attack by lubricants, relatively impervious to both liquids and gases, and has a coefficient of friction at least 50% lower than the identical leather sealing element without the surface coating of this invention.
- Coating both sides of the sealing element has certain advantages. It stiflens each side of the leather in equal degree; it provides a smooth finished surface on both sides of the sealing element; and it provides a substantially 'sealed reservoir for lubricant within the body of leatherproper.
- the outer rim of this reservoir is sealed by the surrounding housing for the sealing element, leaving only the inner peripheral edge exposed to the interior of the appliance housing and the supply of oil therein. If the seal is to be used in a location not exposed to lubricating mediums, then the sealing element can be saturated with lubricant before installation.
- the sealing edge of the lip has a continuous supply of oil available at all As soon as a film of oil between the shaft and the contacting edge of the seal tends to disappear, it is immediately replenished from the supply stored by capillary action in the body of the seal. Furthermore, the low friction coating in direct contact with the shaft contains a dry lubricant locked within the coating. This dry lubricant supplements the liquid lubricant within the body of the sealing element.
- the coating compositions which we have found to be so satisfactory for surface films or coatings are elastomers or rubber-like synthetics incorporating one or more dry lubricants that are dispersed therein to impart lubricity and other related properties important to a properly functioning seal.
- the coating elastomer may be Neoprene GN .(trade name for neoprene with an antioxidant stabilizer), or Neoprene, GRT (trade name for neoprene with low temperature crystallization inhibitor), standard elastomen'c polymers of chloroprene commeroially available from E. I. du 'POl'llt dc Nemburs & 00.
- this material should be compounded for rapid curing and mixed with between and 60 parts by volume of a filling agent having lubricating properties such as graphite, molybdenum disulfide, mica or talc. F or graphite, the range by weight is between and 120 parts per 100 parts elastomer.)
- a filling agent having lubricating properties
- This mixture is dissolved in a suitable solvent to provide a low viscosity solution of 5-20% solids. If a lower solids content is employed, the film does not distribute uniformly to provide a reliably continuous veneer, while a solution of higher solids content is too viscous for satisfactory results. It will, of course, be understood by those skilled in the handling of elastomeric compositions that suitable curing agents, anti-oxidants and accelerators are required as usual.
- Suitable solvents include a mixture of one or more aromatics (toluene, benzene, or xylene and homologues of them) with paraffin hydrocarbons (e.g., gasoline or kerosene) or ketones (acetone, methyl-ethyl-ketone, and other liquids of the group) or naphthas. Wide variations of quantities can be used, and which solvent mixture is selected will depend on factors such as evaporation rate desired, cost, toxicity, etc.
- Neoprene rubber Another composition giving excellent results employs copolymers of butyl acrylate and acrylonitrile or ethyl acrylate and chloroethyl-vinyl ether in lieu of neoprene.
- Such a composition may be compounded as follows:
- EXAMPLE II Polyacrylic elastomer Constituents: Parts by weight Lactoprene BA 12.5 (An acrylonitrile (87.5 )-butyl acrylate (12.5% copolymer) 100 Stearic acid 1 Sulfur 1 Triethylene tetramine 4 Graphite 80 Total solids 186 Methyl-ethyl-ketone 1,504 Toluene 170 Total liquids 1,674
- Still another composition which we have found to provide an excellent adherent veneer for leather employs chlorosulphonated polyethylene as a principal elastomeric component.
- This coating composition is made from the Kenflex BKenrich Corp. trademark for a non-volatile synthetic polymer of aromatic hydrocarbons which has a melting point of 80 F
- mica, talc, and molybdenum disulfide may be substituted for graphite, in equal volumes.
- Graphite is, however, preferred.
- compositions may be applied to the leather by dipping, dripping, spraying or other common coating techniques.
- Curing or molding may be for one minute at a temperature of approximately 275 F. It will, of course, be appreciated that the pressure, molding period and temperature may be varied over a considerable range as found to give the best results for the particular leather and coating composition being used. Molding may be carried out for longer periods (up to 90 seconds) at lower temperatures, and shorter periods (down to 10 seconds) at higher temperatures, but temperatures higher than 325 F. should be avoided, else damage to the leather may result.
- a coating composition for leather liquid-lubricantsealing members consisting essentially of a solvent-elastomer dispersion of (1) 8095% by weight of a solvent mixture consisting (A) an aromatic solvent selected from the group consisting of benzene, toluene and xylene, and (B) an aliphatic solvent selected from the group consisting of acetone, methyl ethyl ketone, gasoline, kerosene and naphtha, and
- a solids mixture consisting essentially of '(C) liquid-lubricant-resistant flexible elastomer selected from the group consisting of polychloroprene, copolymers of ethyl acrylate and chloroethyl vinyl ether, copolymers of butyl acrylate and acrylonitrile, and chlorosulfonated polyethylene, and (D) 10-60 parts by volume per 100 parts by volume of (C) of a dry lubricant selected from the group consisting of graphite, molybdenum disulfide, talc, and mica.
- a coating composition for leather liquid-lubricantsealing members consisting essentially of a solvent-elastomer dispersion of (1) -95% by weight of a solvent mixture consisting (A) about by weight of (1) of methyl ethyl ketone 75 (B) about 10% by weight of 1) of toluene 5 (2) 5-20% by weight of a solids mixture consisting essentially of (C) a liquid-lubricant-resistant flexible elastomer selected from the group consisting of polychloroprene, copolymers of ethyl acrylate and ohloroethyl vinyl ether, copolymers of butyl acrylate and acrylonitrile, and chlorosulfonated polyethylene, and (B) 10-60 parts by volume per 100 parts by volume of (C) of a dry lubricant selected from the group consisting of graphite, molybdenum disulfide, talc, and mica.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Description
United States Patent Orifice a My 19.,
season 2 Claims. (Cl. zen-32.8
This invention relates to a novel composition of matter used to coat the leather element in shaft and rod seals. This application is a division of our application Serial No. 713,024, filed February 3, 1958, now U.S. Patent No. 2,983,131, which in turn is a division of our application Serial Number 540,104, filed October 12, 1955, now U.S. Patent No. 2,854,267, which was a continuation-in-part of our application Serial Number 519,862, filed July 5, 1955 now abandoned.
Leather has long been favored as far superior to most materials as a pliant sealing element for shafts, reciprocating rods and the like. Despite this, it is recognized that leather has certain disadvantages and fails to exhibit, to the degree desired, all the characteristics needed to meet the ever increasing requirements for a satisfactory seal. For example, leather varies Widely in density, resilience, porosity and flexibility, all of which affect performance and suitability for use as sealing elements. Accordingly, over the years much effort has been directed toward improved processing procedures in an endeavor to provide a product of more uniform properties and longer service life. In addition, these attempts have included the augmentation of existing properties as well as the inclusion of new ones.
Another facet of the problem derives from the fact that certain desired properties of leather are customarily found only in combination with undesirable ones. For example, a leather having the desired flexibility is too soft to maintain good sealing contact with an eccentrically rotating shaft, or one which vibrates or whips as it rotates. Also, a flexible leather usually is quite porous. In consequence, it has a high reservoir capacity for lubricantan advantageous quality. But this porosity is also attended by seepage of lubricant through the side Walls of 'the leathera highly undesirable quality. Previous efforts to seal the pores have destroyed the leathers capacity for storing lubricant and have stiffened the leather vobjectionably.
of novel coating compositions suitable for sealing the surface of leather, textiles and the like and of imparting new and unique properties thereto in a simple, inexpensive and highly eflicient manner.
Numerous other objects and. advantages of the invention will become readily apparent from the following detailed specification.
The invention provides a thin film or veneer of a special elastomer bonded to one or more surfaces of the leather. If. only one surface of the leather member is to be coated, it is preferable to coat the hair side rather than the opposite flesh side and, in a shaft seal, to so mount the seal in the housing bore that the elastomeric veneer is in contact with the shaft and is remote from the interior of the housing.
The principal functional ingredients of the veneer are a synthetic oil-resistant elastomer such as neoprene, a polyacrylic, a nitrile, or a chlorosulfonated polyethylene rubber having a suitable dry lubricant dispersed therein, such as graphite, molybdenum disulfide, mica or talc. These substances, compounded along with a suitable solvent vehicle in a manner to be disclosed below, are applied in liquid form to the surface of the leather sealing member and then vulcanized.
The elastomer does not penetrate beyond the base of the hair pore openings or of the surface crevices and other imperfections of the leather. This confinement of the veneer to the immediate surface area of the leather and its absence from the many voids in the body of the leather is highly important and has several advantages. Thus, the absence of elastomer from the interior body of the leather permits of a free and natural capillary flow of lubricant within the leather in a path generally parallel to the inner and outer surfaces. Secondly, the many voids naturally present in the leather are available as lubricant storage reservoirs. And, thirdly, the inherent flexibility of the body of the leather is not adversely affected by the presence of incompressible particles filling the voids. And, of special significance, the exterior surface of the leather or the one in contact with the rotating shaft is sealed by a thin film of resilient material which is highly resistant to attack by lubricants, relatively impervious to both liquids and gases, and has a coefficient of friction at least 50% lower than the identical leather sealing element without the surface coating of this invention.
In practice, a film thickness of 2 to 5 mils has been found most effective. Greater thicknesses can be employed but have a tendency to stiffen the leather objectionably and are not found to add to the service life of the sealing element to any material extent.
Coating both sides of the sealing element has certain advantages. It stiflens each side of the leather in equal degree; it provides a smooth finished surface on both sides of the sealing element; and it provides a substantially 'sealed reservoir for lubricant within the body of leatherproper. The outer rim of this reservoir is sealed by the surrounding housing for the sealing element, leaving only the inner peripheral edge exposed to the interior of the appliance housing and the supply of oil therein. If the seal is to be used in a location not exposed to lubricating mediums, then the sealing element can be saturated with lubricant before installation. Thus, in either mode of use, the sealing edge of the lip has a continuous supply of oil available at all As soon as a film of oil between the shaft and the contacting edge of the seal tends to disappear, it is immediately replenished from the supply stored by capillary action in the body of the seal. Furthermore, the low friction coating in direct contact with the shaft contains a dry lubricant locked within the coating. This dry lubricant supplements the liquid lubricant within the body of the sealing element.
The coating compositions which we have found to be so satisfactory for surface films or coatings are elastomers or rubber-like synthetics incorporating one or more dry lubricants that are dispersed therein to impart lubricity and other related properties important to a properly functioning seal. For example, the coating elastomer may be Neoprene GN .(trade name for neoprene with an antioxidant stabilizer), or Neoprene, GRT (trade name for neoprene with low temperature crystallization inhibitor), standard elastomen'c polymers of chloroprene commeroially available from E. I. du 'POl'llt dc Nemburs & 00. One hundred parts of this material should be compounded for rapid curing and mixed with between and 60 parts by volume of a filling agent having lubricating properties such as graphite, molybdenum disulfide, mica or talc. F or graphite, the range by weight is between and 120 parts per 100 parts elastomer.) This mixture is dissolved in a suitable solvent to provide a low viscosity solution of 5-20% solids. If a lower solids content is employed, the film does not distribute uniformly to provide a reliably continuous veneer, while a solution of higher solids content is too viscous for satisfactory results. It will, of course, be understood by those skilled in the handling of elastomeric compositions that suitable curing agents, anti-oxidants and accelerators are required as usual.
Suitable solvents include a mixture of one or more aromatics (toluene, benzene, or xylene and homologues of them) with paraffin hydrocarbons (e.g., gasoline or kerosene) or ketones (acetone, methyl-ethyl-ketone, and other liquids of the group) or naphthas. Wide variations of quantities can be used, and which solvent mixture is selected will depend on factors such as evaporation rate desired, cost, toxicity, etc.
The following specific examples sufiice to illustrate the relative proportions of constituents which have been found particularly suitable in actual practice:
EXAMPLE I Neoprene rubber Another composition giving excellent results employs copolymers of butyl acrylate and acrylonitrile or ethyl acrylate and chloroethyl-vinyl ether in lieu of neoprene. Such a composition may be compounded as follows:
EXAMPLE II Polyacrylic elastomer Constituents: Parts by weight Lactoprene BA 12.5 (An acrylonitrile (87.5 )-butyl acrylate (12.5% copolymer) 100 Stearic acid 1 Sulfur 1 Triethylene tetramine 4 Graphite 80 Total solids 186 Methyl-ethyl-ketone 1,504 Toluene 170 Total liquids 1,674
Grand total 1,860
Still another composition which we have found to provide an excellent adherent veneer for leather employs chlorosulphonated polyethylene as a principal elastomeric component. This coating composition is made from the Kenflex BKenrich Corp. trademark for a non-volatile synthetic polymer of aromatic hydrocarbons which has a melting point of 80 F In any of these examples, mica, talc, and molybdenum disulfide may be substituted for graphite, in equal volumes.
Graphite is, however, preferred.
Any of the foregoing compositions may be applied to the leather by dipping, dripping, spraying or other common coating techniques. Curing or molding may be for one minute at a temperature of approximately 275 F. It will, of course, be appreciated that the pressure, molding period and temperature may be varied over a considerable range as found to give the best results for the particular leather and coating composition being used. Molding may be carried out for longer periods (up to 90 seconds) at lower temperatures, and shorter periods (down to 10 seconds) at higher temperatures, but temperatures higher than 325 F. should be avoided, else damage to the leather may result.
We claim:
1. A coating composition for leather liquid-lubricantsealing members, consisting essentially of a solvent-elastomer dispersion of (1) 8095% by weight of a solvent mixture consisting (A) an aromatic solvent selected from the group consisting of benzene, toluene and xylene, and (B) an aliphatic solvent selected from the group consisting of acetone, methyl ethyl ketone, gasoline, kerosene and naphtha, and
(2) 520% by weight of a solids mixture consisting essentially of '(C) liquid-lubricant-resistant flexible elastomer selected from the group consisting of polychloroprene, copolymers of ethyl acrylate and chloroethyl vinyl ether, copolymers of butyl acrylate and acrylonitrile, and chlorosulfonated polyethylene, and (D) 10-60 parts by volume per 100 parts by volume of (C) of a dry lubricant selected from the group consisting of graphite, molybdenum disulfide, talc, and mica.
2. A coating composition for leather liquid-lubricantsealing members, consisting essentially of a solvent-elastomer dispersion of (1) -95% by weight of a solvent mixture consisting (A) about by weight of (1) of methyl ethyl ketone 75 (B) about 10% by weight of 1) of toluene 5 (2) 5-20% by weight of a solids mixture consisting essentially of (C) a liquid-lubricant-resistant flexible elastomer selected from the group consisting of polychloroprene, copolymers of ethyl acrylate and ohloroethyl vinyl ether, copolymers of butyl acrylate and acrylonitrile, and chlorosulfonated polyethylene, and (B) 10-60 parts by volume per 100 parts by volume of (C) of a dry lubricant selected from the group consisting of graphite, molybdenum disulfide, talc, and mica.
References Cited in the file of this patent UNITED STATES PATENTS Stewart Nov. 16, 1937 Dombnow et a1 Mar. 22, 1949 Pyle June 10, 1952 Cheronis Apr. 14, 1953 Wilson Sept. 30, 1958 Crissey et a1 Apr. 216, 1960 Morris May 31, 1960
Claims (1)
1. A COATING COMPOSITION FOR LEATHER LIQUID-LUBRICANTSEALING MEMBERS, CONSISTING ESSENTIALLY OF A SOLVENT-ELASTOMER DISPERSION OF (1) 80-95% BY WEIGHT OF A SOLVENT MIXTURE CONSISTING OF
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US859830A US3047526A (en) | 1959-11-16 | 1959-11-16 | Leather-coating composition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US859830A US3047526A (en) | 1959-11-16 | 1959-11-16 | Leather-coating composition |
Publications (1)
Publication Number | Publication Date |
---|---|
US3047526A true US3047526A (en) | 1962-07-31 |
Family
ID=25331813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US859830A Expired - Lifetime US3047526A (en) | 1959-11-16 | 1959-11-16 | Leather-coating composition |
Country Status (1)
Country | Link |
---|---|
US (1) | US3047526A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3163968A (en) * | 1962-12-31 | 1965-01-05 | Roscoe E Nafus | Graphite coated abrasive belts |
US3298856A (en) * | 1965-02-12 | 1967-01-17 | Miljo Chemical Company Inc | Methods of finishing leather, and products thereby obtained |
US3341454A (en) * | 1963-02-25 | 1967-09-12 | Hodson Corp | Lubricant composition |
US3691118A (en) * | 1968-01-12 | 1972-09-12 | Murray Fishman | Leather printing composition |
US5453209A (en) * | 1991-09-09 | 1995-09-26 | Simon; Juanito A. | Chemical metal and oil treating composition and process |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2099241A (en) * | 1935-09-26 | 1937-11-16 | Garlock Packing Co | Packing composition |
US2465073A (en) * | 1947-02-06 | 1949-03-22 | Nopco Chem Co | Plasticized compositions |
US2600321A (en) * | 1949-12-29 | 1952-06-10 | Gen Electric | Self-lubricated plastics |
US2635059A (en) * | 1948-10-26 | 1953-04-14 | Edwin L Gustus | Resin-impregnated water-resistant leather |
US2854351A (en) * | 1953-06-09 | 1958-09-30 | Wilson Harry Walter | Method of applying dressing for prolonging the effective life of cloth belts and resultant article |
US2934510A (en) * | 1956-02-02 | 1960-04-26 | Du Pont | Coating compositions containing polymer of methyl methacrylate |
US2938876A (en) * | 1957-05-03 | 1960-05-31 | B B Chem Co | Process of making reinforced rubber products and adhesives |
-
1959
- 1959-11-16 US US859830A patent/US3047526A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2099241A (en) * | 1935-09-26 | 1937-11-16 | Garlock Packing Co | Packing composition |
US2465073A (en) * | 1947-02-06 | 1949-03-22 | Nopco Chem Co | Plasticized compositions |
US2635059A (en) * | 1948-10-26 | 1953-04-14 | Edwin L Gustus | Resin-impregnated water-resistant leather |
US2600321A (en) * | 1949-12-29 | 1952-06-10 | Gen Electric | Self-lubricated plastics |
US2854351A (en) * | 1953-06-09 | 1958-09-30 | Wilson Harry Walter | Method of applying dressing for prolonging the effective life of cloth belts and resultant article |
US2934510A (en) * | 1956-02-02 | 1960-04-26 | Du Pont | Coating compositions containing polymer of methyl methacrylate |
US2938876A (en) * | 1957-05-03 | 1960-05-31 | B B Chem Co | Process of making reinforced rubber products and adhesives |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3163968A (en) * | 1962-12-31 | 1965-01-05 | Roscoe E Nafus | Graphite coated abrasive belts |
US3341454A (en) * | 1963-02-25 | 1967-09-12 | Hodson Corp | Lubricant composition |
US3298856A (en) * | 1965-02-12 | 1967-01-17 | Miljo Chemical Company Inc | Methods of finishing leather, and products thereby obtained |
US3691118A (en) * | 1968-01-12 | 1972-09-12 | Murray Fishman | Leather printing composition |
US5453209A (en) * | 1991-09-09 | 1995-09-26 | Simon; Juanito A. | Chemical metal and oil treating composition and process |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2785571B2 (en) | Surface coating member | |
US5376454A (en) | Surface coating member | |
US2597976A (en) | Gasket | |
US3047526A (en) | Leather-coating composition | |
US20130045332A1 (en) | Windshield treatment and wiper blade combination | |
US2181835A (en) | Thread surface coating composition | |
KR102191635B1 (en) | Coatings, surface-coated elastomers and surface-coated rubber metal laminates | |
US2854267A (en) | Shaft seals | |
US2564882A (en) | Saturating composition for impregnating glass fiber sheet material | |
JP3164382B2 (en) | Lubricating rubber composition and lubricating rubber molded article comprising the same | |
JP6585641B2 (en) | Anti-vibration rubber composition and anti-vibration rubber member | |
CA1283494C (en) | Adhesion of silicone sealant | |
US2581407A (en) | Joint lubricant and sealing composition | |
US7270875B2 (en) | Gland packing | |
US2099241A (en) | Packing composition | |
US2560051A (en) | Friction material lubricant | |
JPS5859275A (en) | Lubricating oil-resistant sealing material | |
US3220879A (en) | Sealing strip comprising polychloroprene rubber base coated with composition consisting essentially of silicone gum and chlorinated sulfonated polyethylene | |
JPH0285540A (en) | Sealing liquid for liquid-sealed type vibration-proof mount | |
US3025177A (en) | Sealant composition | |
US2547358A (en) | Process for sealing packings | |
JP3428919B2 (en) | Sliding member | |
US2911327A (en) | Leather article | |
US334579A (en) | gaelock | |
US2465552A (en) | Synthetic rubberlike coating and sealing compound |