WO1980000709A1 - Fiber coating composition,method of application,and product thereof - Google Patents

Fiber coating composition,method of application,and product thereof Download PDF

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Publication number
WO1980000709A1
WO1980000709A1 PCT/US1979/000767 US7900767W WO8000709A1 WO 1980000709 A1 WO1980000709 A1 WO 1980000709A1 US 7900767 W US7900767 W US 7900767W WO 8000709 A1 WO8000709 A1 WO 8000709A1
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WO
WIPO (PCT)
Prior art keywords
composition
substrate
further characterized
weight
fabric
Prior art date
Application number
PCT/US1979/000767
Other languages
French (fr)
Inventor
G West
W Polfus
Original Assignee
Reeves Bros Inc
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 Reeves Bros Inc filed Critical Reeves Bros Inc
Priority to DE19792953173 priority Critical patent/DE2953173A1/en
Publication of WO1980000709A1 publication Critical patent/WO1980000709A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0016—Plasticisers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/56—Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
    • C08K5/57—Organo-tin compounds

Definitions

  • the present invention relates to rainwear products which have superior durability, breathability and "handle". Notably, these products are substantially wind-resistant and water-repellent.
  • a synthetic fiber may resist water absorption, and yet fabrics composed of that fiber can be thoroughly wetted by water. What occurs is that water coating the surface of each fiber fills voids between fibers of the fabric. Because a fiber is hydrophobic, does not mean that fabrics made from them are water-repellent. In fact, voids which lie between fibers can act like capillaries to enhance the spreading and wicking of water. Consequently, fabrics are generally treated with special finishes to impart desirable characteristics.
  • the present invention discloses a superior formulation, method of application and product thereof which overcomes the disadvantages of the prior art noted above and which is substantially wind-resistant and water-repellent.
  • a unique chemical formulation which, when avpplied to a fabric, results in a product that is substantially wind-resistant and water-repellent.
  • the formulation comprises two criti cal components, namely, a silicone polymer and a tin cata lyst. More specifically, the first component is a poly dimethyl siloxane compound having a concentration between about 93 to about 99% by weight. Siloxane compounds are manufactured by Dow Corning.
  • the second component consists of a tin catalyst like dibutyl tin diacetate or preferably dibutyl tin dilaurate, both of which are manufactured by Dow Corning. The concentration of the tin catalyst should be between about 0.5 to about 1.5% by weight.
  • the formulation includes an acid like glacial acetic acid manufactured by Industrial Chemical and an aromatic solvent like xylol manufactured by Amsco.
  • the optional ingredients perform the function of extending the shelf life of the formulation once the polymer and tin catalyst are mixed.
  • the concentration ranges for the acid and solvent are 0.0 to about 1.5% by weight and 0.0 to about 5.0% by weight, respectively.
  • a method is also taught for applying the formulation to a substrate such as fabrics used in manufacturing raincoats . The method comprises three basic steps. One step includes depositing the formulation on a substrate, uniformly distributing it across the width of the substrate and curing the product. Another step comprises dipping the substrate in a bath of silicone of fluorocarbon solution and removing excess solution. The other treatment can be performed either before or after the first mentioned step.
  • the last step comprises compressing the multicoated fibers of the substrate from the first two steps.
  • the fabric is porous, durable, and has a good handle.
  • the product is substantially wind-resistant and water-repellent. Over all, it overcomes the disadvantages of the prior art noted above.
  • the formulation of the subject invention comprises two critical components as well as two optional, components.
  • the formulation listed below, along with the range of concentration for each of the components, is a typical formulation within the purview of the subject invention:
  • the preferred formulation is:
  • Aromatic Solvent 3.0 The poly dimethyl siloxane component is critical to the formulation.
  • a suitable siloxane is manufactured by Dow
  • the viscosity of the siloxane is between 20,000 to 40,000 centipoise at 25°C.
  • the silicone content is about 30% by weight.
  • suitable catalysts are dibutyl tin diacetate, dibutyl tin dilaurate, and dibutyl tin octoate.
  • the tin content of such catalysts are important.
  • the tin content is 8.7% by weight and 33.4% by weight for the respective Dow Corning catalysts. That concentration of tin is contained within the concentration range of 0.5 to 1.5% by weight of the catalyst component.
  • the two remaining components are optional and function to reduce the viscosity of the formulation. More importantly, they increase the life of the formulation so that it is more suitable for commercial applications.
  • the acid is acetate acid.
  • Other acids are also suitable.
  • the aromatic solvent is typically xylol.
  • Other solvents, such as toluene, are suitable. Both the acid and solvent pass to the atmosphere during processing.
  • the method comprises three basic steps.
  • One step is directed to the application of the unique formulation.
  • the formulation is deposited upon a surface of a taut substrate, which continuously passes beneath the point of deposition.
  • the formulation can be applied to one or both sides of the substrate. However, application to one side is preferred. Multiple depositions or coatings are within the purview of the subject invention.
  • a conventional floating doctor blade having a thickness of about 0.25 to 0.40, is used to uniformly spread the formulati ⁇ n across the width of the substrate.
  • the substrate and deposited formulation are cured in an oven having a temperature of about 300°F. That conventional oven may have two stages with the first stage at 300°F., while the second stage is at 325°F.
  • the purpose of the first mentioned step is to impart both wind-resistance and water-repellency to the finished substrate.
  • the viscosity of the formulation is typically between about 20,000 to about 100,000 centipoise as measured with a Brookfield Viscometer. A preferred range of viscosity is between about 20,000 and about 40,000 centipoise. If the viscosity is lower than 20,000 centipoise, the formulation will run through the substrate and stiffen it. If the viscosity is higher than about 100,000 centipoise, it becomes difficult to uniformly coat the surface of and penetrate the substrate.
  • Another step in the method comprises padding the substrate in a bath containing a silicone or a fluorocarbon solution along with the attendant removal of excess solution.
  • Typical silicone and fluorocarbon solutions appear below:
  • Acetic Acid (56%) Acetic Acid 0.5 (Taylor Chemical)
  • a very thin coat of either solution is applied and produces an add-on weight to the finished product of about 0.05 to about 0.1 oz./square yard.
  • the solution is dried for three minutes at about 250°F. and cured for about two minutes at 340°F.
  • This other procedure can be applied either before or after application of the first step. If the solution is applied prior to the application of the formulation, a silicone solution is preferred.
  • the purpose of this paddingtechnique is to impart greater water-repellency to the sub-strate.
  • the substrate is padded on both of its sides.
  • the last step in the method comprises compressing the substrate. For example, if a fabric is used, it is compressed or shrunk by conventional techniques about 1/10 of 1% in its width. Its length is compressed by a similar amount. The purpose of this step is to give the treated substrate a suitable handle.
  • the add-on weight to the substrate should be between about 0.4 to about 0.8 oz./square yard. significant is the fact that present invention is directed to coating fibers rather than coating the surface of a substrate constructed from these fibers.
  • Typical substrates used in the subject of the invention are polyester-cotton combinations at various percent mixtures, natural fiber fabrics, synthetic materials, and combinations of natural and synthetic materials. Some fabrics are not acceptable, such as canvas and taffeta. The density of such fabrics varies between about 3.0 to about 6.0 oz./square yard.
  • the fabric must be closely woven or tight, that is, have a thread count of at least about 90 threads per inch in the warp and at least about 68 threads per inch in the weft or fill.
  • a typical fabric would have a thread count of 106 X 70 threads per inch, i.e. warp X weft. A thread count less than those noted above allows the formulation to pass through the substrate.
  • the initial viscosity of each formulation is about 20,000 centipoise.
  • the physical properties of the rainwear mate rial manufactured in each example are also described.
  • a typical testing apparatus comprises an eight-foot water column which is connected to a spray nozzle facing a test sample that is stretch over a hoop. The specimen is backed by a weighed blotter and is sprayed for five minutes. Thereafter, the blotter is again weighed to ascertain any increase in weight caused by penetration of water through the sample. An increased weight of five grams is acceptable. An increased weight of about one gram is excellent.
  • Water vapor transmission is determined by using a special metal cup into which is measured about 90 mis of distilled water. The test sample is clamped over the cup and the level of the water is within about 20 mm of the fabric sample. The apparatus, including cup, water and sample, is weighed. After 24 hours in a conditioned atmosphere, the cup is re-weighed to determine loss of water which penetrated the sample. The data is reported in grams/hr./ square meter. A number of 25-35 is considered ideal.
  • EXAMPLE I A polyester-cotton fabric having a thread count of 106 threads per inch by 70 threads per inch was tested.
  • the fabric sample was processed according to the method detailed above. Specifically, a formulation was deposited on the sample.
  • the formulation comprised:
  • That formulation was deposited on the fibrous substrate and evenly spread over one of its surfaces. The sample was then cured at about 300°F. Then the sample was padded with the fluorocarbon composition described in detail above. Excess solution was removed. The sample was dried for about three minutes at 250°F. and then cured for about two minutes at 340°F. That sample was then compressively shrunk using the conventional technique described above. The finished product containing multicoated fibers was analyzed. Pertinent physical properties are described below:
  • Example I was repeated except the formulation differed:
  • Example II The physical properties of the product resulting from using the above formulation was substantially identical to those obtained in Example II.
  • the decrease in the concentration of acetic acid merely decreased the shelf life of the formu lation and increased its viscosity all in relation to the formula used in Example II.
  • Example II was again repeated except that a different cata lyst was used.
  • the formulation appears below:
  • Example II was repeated on a commercial scale. Approximately 120 yards of sample were processed. Formula used was as follows:
  • Example II utilizes the preferred formulation of the subject invention.
  • Example I was repeated except that the fabric was padded with a silicone solution described in detail above instead of the fluorocarbon solution.
  • This example was operated at a commercial scale with approximately 6000 yards of fabric being manufactured.
  • the formulation used in this commercial scale operation was: Concentration

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)

Abstract

Unique chemical formulation used in the manufacture of substantially wind-resistant, water-repellent fabrics. The formulation comprises a silicone polymer catalyzed with at in compound and optionally includes acetic acid and an aromatic solvent. A method for treating fabrics includes depositing the unique formulation on a taut fabric, uniformly distributing it across the width of the fabric and curing that product. Either before or after that treatment, the fabric is padded with or dipped in a bath of silicone or hydrofluorocarbon. Excess solution is removed. Last, the multicoated fibers of the fabric are compressively shrunk. A substantially wind and water-resistant fabric is produced that is not only porous and soft but also durable.

Description

FIBER COATING COMPOSITION, METHOD OF APPLICATION, AND PRODUCT THEREOF
TECHNICAL FIELD The present invention relates to rainwear products which have superior durability, breathability and "handle". Notably, these products are substantially wind-resistant and water-repellent.
BACKGROUND ART Generally, water-repellency and wind-resistance depend upon the characteristics of a fabric and the fiber from which it is constructed. Unbleached cotton and linen fabrics have inherent water-repellency because natural waxes are present. But, scoured and bleached cotton and linen fabrics, as well as rayon fabrics, are hydrophilic; that is, absorb water. Wool has some initial repellency, but it eventually absorbs water.
A synthetic fiber may resist water absorption, and yet fabrics composed of that fiber can be thoroughly wetted by water. What occurs is that water coating the surface of each fiber fills voids between fibers of the fabric. Because a fiber is hydrophobic, does not mean that fabrics made from them are water-repellent. In fact, voids which lie between fibers can act like capillaries to enhance the spreading and wicking of water. Consequently, fabrics are generally treated with special finishes to impart desirable characteristics.
Conventional finishes form a coating over the fabric sur face. Typical finishes comprise paraffins, natural and synthetic rubber, as well as a variety of resins. Canvas illustrates such coated fabrics. Unfortunately, those finishes increase the weight of the product by approximate ly 50 to 90 percent. Moreover, the coated product is neither porous, durable nor soft. Silicone and certain fluorinated polymers are also popular coating materials. However, these coatings are either not durable or not aesthetic. Moreover, both water and wind, for example, in a driving rain, can penetrate fabrics coated with these materials due to the porosity of the fabric and the force at which water and wind contact the fabric.
The present invention discloses a superior formulation, method of application and product thereof which overcomes the disadvantages of the prior art noted above and which is substantially wind-resistant and water-repellent.
DISCLOSURE OF INVENTION According to the present invention, a unique chemical formulation is disclosed which, when avpplied to a fabric, results in a product that is substantially wind-resistant and water-repellent. The formulation comprises two criti cal components, namely, a silicone polymer and a tin cata lyst. More specifically, the first component is a poly dimethyl siloxane compound having a concentration between about 93 to about 99% by weight. Siloxane compounds are manufactured by Dow Corning. The second component consists of a tin catalyst like dibutyl tin diacetate or preferably dibutyl tin dilaurate, both of which are manufactured by Dow Corning. The concentration of the tin catalyst should be between about 0.5 to about 1.5% by weight.
Optionally, the formulation includes an acid like glacial acetic acid manufactured by Industrial Chemical and an aromatic solvent like xylol manufactured by Amsco. The optional ingredients perform the function of extending the shelf life of the formulation once the polymer and tin catalyst are mixed. The concentration ranges for the acid and solvent are 0.0 to about 1.5% by weight and 0.0 to about 5.0% by weight, respectively. A method is also taught for applying the formulation to a substrate such as fabrics used in manufacturing raincoats . The method comprises three basic steps. One step includes depositing the formulation on a substrate, uniformly distributing it across the width of the substrate and curing the product. Another step comprises dipping the substrate in a bath of silicone of fluorocarbon solution and removing excess solution. The other treatment can be performed either before or after the first mentioned step. The last step comprises compressing the multicoated fibers of the substrate from the first two steps. This results in a product which is superior to those of the prior art. Specifically, the fabric is porous, durable, and has a good handle. More importantly, the product is substantially wind-resistant and water-repellent. Over all, it overcomes the disadvantages of the prior art noted above.
BEST MODE FOR CARRYING OUT THE INVENTION As previously mentioned, the formulation of the subject invention comprises two critical components as well as two optional, components. The formulation listed below, along with the range of concentration for each of the components, is a typical formulation within the purview of the subject invention:
Concentration Range
Component Percent by Weight
Poly Dimethyl Siloxane 93 - 99
Tin Catalyst 0.5 - 1.5
Acid 0 - 1.5
Aromatic Solvent 0 - 5.0
The preferred formulation is:
Concentration
Comoonent Percent by Weight
Poly Dimethyl Siloxane 95.3
Dibutyl Tin Dilaurate 0.7
Acetic Acid 1.0
Aromatic Solvent 3.0 The poly dimethyl siloxane component is critical to the formulation. A suitable siloxane is manufactured by Dow
Corning. Typically, the viscosity of the siloxane is between 20,000 to 40,000 centipoise at 25°C. The silicone content is about 30% by weight.
Regarding the critical tin catalyst component, suitable catalysts are dibutyl tin diacetate, dibutyl tin dilaurate, and dibutyl tin octoate. The tin content of such catalysts are important. Dow Corning manufactures suitable catalyst under the trade names XY 170 (dibutyl tin dilaurate) and XY 176 (dibutyl tin diacetate). The tin content is 8.7% by weight and 33.4% by weight for the respective Dow Corning catalysts. That concentration of tin is contained within the concentration range of 0.5 to 1.5% by weight of the catalyst component.
The two remaining components are optional and function to reduce the viscosity of the formulation. More importantly, they increase the life of the formulation so that it is more suitable for commercial applications. Typically, the acid is acetate acid. Other acids are also suitable. The aromatic solvent is typically xylol. Other solvents, such as toluene, are suitable. Both the acid and solvent pass to the atmosphere during processing.
As previously mentioned, the method comprises three basic steps. One step is directed to the application of the unique formulation. The formulation is deposited upon a surface of a taut substrate, which continuously passes beneath the point of deposition. The formulation can be applied to one or both sides of the substrate. However, application to one side is preferred. Multiple depositions or coatings are within the purview of the subject invention. A conventional floating doctor blade, having a thickness of about 0.25 to 0.40, is used to uniformly spread the formulatiαn across the width of the substrate. Thereafter the substrate and deposited formulation are cured in an oven having a temperature of about 300°F. That conventional oven may have two stages with the first stage at 300°F., while the second stage is at 325°F. The purpose of the first mentioned step is to impart both wind-resistance and water-repellency to the finished substrate.
The viscosity of the formulation is typically between about 20,000 to about 100,000 centipoise as measured with a Brookfield Viscometer. A preferred range of viscosity is between about 20,000 and about 40,000 centipoise. If the viscosity is lower than 20,000 centipoise, the formulation will run through the substrate and stiffen it. If the viscosity is higher than about 100,000 centipoise, it becomes difficult to uniformly coat the surface of and penetrate the substrate.
Another step in the method comprises padding the substrate in a bath containing a silicone or a fluorocarbon solution along with the attendant removal of excess solution. Typical silicone and fluorocarbon solutions appear below:
Silicone Solution
Concentration
Trade Name Chemical Composition Percent by Weight
Water H2O 56.0
Perma Fresh 114B Modified Glyoxal Resin 15.0 (Sun Chemical Co.)
Acetic Acid (56%) Acetic Acid 0.5 (Taylor Chemical)
Isopropanol Alcohol 4.0 (Taylor Chemical)
Relpel SS Silicone Emulsion 12.0
(Reliance Chemical)
Catalyst SS Zinc Stearate 6.0 (Reliance Chemical)
Catalyst X-4 Zinc Nitrate 4.5
(Sun Chemical Co.) Cyanalube TS-1 Polyethylene Emulsion 2 . 0
100.0 Fluorocarbon Solution
Concentration Trade Name Chemical Composition Percent by Weight
Water H2O 67.4
Mykon NRW-3 Fatty Acid Amine Condensate 0.1 (Sun Chemical Co.)
Cyanalube TS-1 Polyethylene Emulsion 2.0 (American Cyanamid)
Perma Fresh 114B Modified Glyoxal Resin 15.0 (Sun Chemical Co.)
Catalyst X-4 Zinc Nitrate 4.0
(Sun Chemical Co.)
Acetic Acid (56%) Acetic Acid 0.5
(Taylor Chemical)
Nalan W Thermosetting Resin 5.5
(DuPont) Condensate
Zepel D (Reg) Fluorocarbon Derivative 5.5 (DuPont) 100.0
A very thin coat of either solution is applied and produces an add-on weight to the finished product of about 0.05 to about 0.1 oz./square yard. The solution is dried for three minutes at about 250°F. and cured for about two minutes at 340°F. This other procedure can be applied either before or after application of the first step. If the solution is applied prior to the application of the formulation, a silicone solution is preferred. The purpose of this paddingtechnique is to impart greater water-repellency to the sub-strate. The substrate is padded on both of its sides.
The last step in the method comprises compressing the substrate. For example, if a fabric is used, it is compressed or shrunk by conventional techniques about 1/10 of 1% in its width. Its length is compressed by a similar amount. The purpose of this step is to give the treated substrate a suitable handle.
The add-on weight to the substrate, after application of the method just described, should be between about 0.4 to about 0.8 oz./square yard. significant is the fact that present invention is directed to coating fibers rather than coating the surface of a substrate constructed from these fibers.
Typical substrates used in the subject of the invention are polyester-cotton combinations at various percent mixtures, natural fiber fabrics, synthetic materials, and combinations of natural and synthetic materials. Some fabrics are not acceptable, such as canvas and taffeta. The density of such fabrics varies between about 3.0 to about 6.0 oz./square yard. The fabric must be closely woven or tight, that is, have a thread count of at least about 90 threads per inch in the warp and at least about 68 threads per inch in the weft or fill. A typical fabric would have a thread count of 106 X 70 threads per inch, i.e. warp X weft. A thread count less than those noted above allows the formulation to pass through the substrate.
EXAMPLES The following examples illustrate the formulation, method of application and a product of the present invention. Although manufacture of rainwear material is described below, that manufacture is merely illustrative of the preferred product and is not considered to limit the present invention.
A number of formulations are described in the examples. The initial viscosity of each formulation is about 20,000 centipoise. The physical properties of the rainwear mate rial manufactured in each example are also described.
Several properties were evaluated, but each property pertains to characteristics essential for outerwear clothing that repels rain. A brief discussion of the most important of these follows along with the procedure used to evaluate the property. Probably the most important of these tests is the Rain Test which measures the resistance of fabrics to penetration of water. A typical testing apparatus comprises an eight-foot water column which is connected to a spray nozzle facing a test sample that is stretch over a hoop. The specimen is backed by a weighed blotter and is sprayed for five minutes. Thereafter, the blotter is again weighed to ascertain any increase in weight caused by penetration of water through the sample. An increased weight of five grams is acceptable. An increased weight of about one gram is excellent.
Another test used to check rainwear is the Hydrostatic Pressure Test, sometimes called the Suter Test. It measures the resistance of fabrics to the penetration of water under static pressure such as that found in a driving rain. A water column is used; and like the Rain Test, water impinges on a sample stretched over a hoop. The first few drops of water penetrating the fabric signals completion of the test. The result is reported to the nearest centimeter of water column height.
Water vapor transmission is determined by using a special metal cup into which is measured about 90 mis of distilled water. The test sample is clamped over the cup and the level of the water is within about 20 mm of the fabric sample. The apparatus, including cup, water and sample, is weighed. After 24 hours in a conditioned atmosphere, the cup is re-weighed to determine loss of water which penetrated the sample. The data is reported in grams/hr./ square meter. A number of 25-35 is considered ideal.
EXAMPLE I A polyester-cotton fabric having a thread count of 106 threads per inch by 70 threads per inch was tested. The fabric sample was processed according to the method detailed above. Specifically, a formulation was deposited on the sample. The formulation comprised:
Concentration
Component Percent by Weight Poly Dimethyl Siloxane 99.5 Dibutyl Tin Diacetate 0.5
100.0
That formulation was deposited on the fibrous substrate and evenly spread over one of its surfaces. The sample was then cured at about 300°F. Then the sample was padded with the fluorocarbon composition described in detail above. Excess solution was removed. The sample was dried for about three minutes at 250°F. and then cured for about two minutes at 340°F. That sample was then compressively shrunk using the conventional technique described above. The finished product containing multicoated fibers was analyzed. Pertinent physical properties are described below:
Test Value
Handle Excellent
Rain Test 0.212 grams
After 3 Washing Cycles 0.315 grams After 3 Dry-cleaning Cycles 0.904 grams
Hydrostatic Pressure Test 49 centimeters
Water Vapor Transmission Test 15.6 gm./hr./sq.m. (65% Relative Humidity)
EXAMPLE II
Example I was repeated except the formulation differed:
Concentration
Component Percent by Weight Poly Dimethyl Siloxane 98.5 Butyl Tin Diacetate 0.5
Glacial Acetic Acid 1.0
100.0 The physical properties of the resulting product were :
Test Value
Handle Excellent Rain Test 0.63 grams
After 3 Washing Cycles 0.74 grams
After 3 Dry-cleaning Cycles 1.14 grams
Hydrostatic Pressure Test 36.4 centimeters
Water Vapor Transmission Test 16.4 gm./hr./sq.m. (65% Relative Humidity)
EXAMPLE III Example II was repeated except that the concentration of the acetic acid was reduced. The formulation appears below:
Concentration Component Percent by Weight
Poly Dimethyl Siloxane 99 .0
Dibutyl Tin Diacetate 0.5
Glacial Acetic Acid 0.5
100.0
The physical properties of the product resulting from using the above formulation was substantially identical to those obtained in Example II. The decrease in the concentration of acetic acid merely decreased the shelf life of the formu lation and increased its viscosity all in relation to the formula used in Example II.
EXAMPLE IV
Example II was again repeated except that a different cata lyst was used. The formulation appears below:
Concentration
Component Percent by Weight Poly Dimethyl Siloxane 98. 3 Dibutyl Tin Dilaurate 0 . 7 Glacial Acetic Acid 1 . 0
100 . 0 The physical characteristics of the product manufactured using this formulation were substantially identical to those of Example II.
EXAMPLE V
Example II was repeated on a commercial scale. Approximately 120 yards of sample were processed. Formula used was as follows:
Concentration
Component Percent by Weight Poly Dimethyl Siloxane 98.3 Dibutyl Tin Dilaurate 0.7 Glacial Acetic Acid 1.0
100.0
The physical characteristics of the product are as follows:
Test Value
Handle Excellent
Rain Test 0.28 grams
After 3 Washing Cycles 0.27 grams After 3 Dry-cleaning Cycles 1.20 grams
Hydrostatic Pressure Test 43.0 centimeters
Water Vapor Transmission Test 14.5 gm./hr./sq.m. (65% Relative Humidity)
EXAMPLE VI
This example utilizes the preferred formulation of the subject invention. Example I was repeated except that the fabric was padded with a silicone solution described in detail above instead of the fluorocarbon solution. This example was operated at a commercial scale with approximately 6000 yards of fabric being manufactured. The formulation used in this commercial scale operation was: Concentration
Component Percent by Weight Poly Dimethyl Siloxane 95 .3 Dibutyl Tin Dilaurate 0 . 7 Glacial Acetic Acid 1.0 Xylol 3 .0
100.0
The physical properties of the commercial product described above were as follows:
Test Value
Handle Excellent
Rain Test 2.5 grams After 3 Washing Cycles 2.5 grams
After 3 Dry-cleaning Cycles 2.5 grams
Hydrostatic Pressure Test 25 centimeters
Water Vapor Transmission Test 13 gm./hr./sq.m. (65% Relative Humidity)
It is not intended to limit the present invention to the specific embodiments described above. It is recognized that other changes may be made in the formulation and method of application specifically described herein without devi ating from the scope and teaching of the present invention. It is intended to encompass all other embodiments, alterna tives, and modifications consistent with the present inven tion.

Claims

Claims :
1. A coating composition for substrates characterized by: a) a poly dimethyl siloxane being present in an amount from about 93 to about 99% by weight of the composition, and b) a tin catalyst being present in an amount from about 0.5 to about 1.5% by weight of the composition.
2. The composition of claim 1 further characterized in that its viscosity is from about 20,000 centipoise to about 100,000 centipoise.
3. The composition of claim 1 further characterized in that its viscosity is between about 20,000 centipoise and 40,000 centipoise.
4. The composition of claim 1 further characterized in that the catalyst is selected from dibutyl tin diacetate, dibutyl tin dilaurate or dibutyl tin dioctoate.
5. The composition of claim 1 further characterized by: c) an acid being present in an amount from about 0.1 to about 1.5 percent by weight of the composition.
6. The composition of claim 1 further characterized in that the acid is acetic acid.
7. The composition of claim 5 further characterized by: d) an aromatic solvent being present in an amount from about 0.1 to about 5.0 percent by weight of the composition.
8. The composition of claim 7 further characterized in that the solvent is xylol.
9. A coating composition for substrates characterized by: a) a poly dimethyl siloxane being present in an amount about 95.3 percent by weight of the composition, b) a dibutyl tin dilaurate catalyst being present in an amount about 0.7 percent by weight of the composition, c) acetic acid being present in an amount about 1.0 percent by weight of the composition, and d) an aromatic solvent being present in an amount about 3.0 percent by weight of the composition.
10. The composition of claim 9 further characterized in that the solvent is xylol.
11. A process for coating substrates characterized by: a) depositing the composition of claims 1 or 9 on a taut substrate, b) uniformly distributing the deposited composition on one surface of the substrate, c) curing the substrate from b), d) padding the substrate with a solution selected from a silicone or a fluorocarbon solution, and e) compressing the substrate whereby it is substantially wind-resistant, water-repellent and has a good handle.
12. The process of claim 11 further characterized in that the substrate is padded before the composition is deposited thereon.
13. The process of claim 11 further characterized in that the composition is deposited on both sides of the substrate.
14. The process of claim 11 further characterized in that the substrate is a closely woven fabric.
15. The process of claim 14 further characterized in that the fabric has a warf of at least about 90 and a weft of at least about 68.
16. The process of claim 14 further characterized in that the substrate is a blend of polyester and cotton.
17. A product from the process of claim 11.
PCT/US1979/000767 1978-09-25 1979-09-24 Fiber coating composition,method of application,and product thereof WO1980000709A1 (en)

Priority Applications (1)

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DE19792953173 DE2953173A1 (en) 1978-09-25 1979-09-24 FIBER COATING COMPOSITION, METHOD OF APPLICATION, AND PRODUCT THEREOF

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US94558978A 1978-09-25 1978-09-25
US945589 1978-09-25

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JP (1) JPS55500679A (en)
BE (1) BE878963A (en)
CA (1) CA1132860A (en)
FR (1) FR2436799A1 (en)
GB (1) GB2043131B (en)
IT (1) IT1119176B (en)
NO (1) NO793065L (en)
WO (1) WO1980000709A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142352A (en) * 1983-07-01 1985-01-16 Wool Dev Int Embossing fabrics

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418162A (en) * 1963-12-07 1968-12-24 Shinetsu Chem Ind Co Composition of waterproof agent and process for manufacture of waterproof cloth using the same
US4007305A (en) * 1974-12-23 1977-02-08 Basf Wyandotte Corporation Method of imparting nondurable soil release and soil repellency properties to textile materials
US4077770A (en) * 1976-07-15 1978-03-07 Rouvellat Richard A Textile cleaning process including soil-repellent finish

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2615078C2 (en) * 1976-04-07 1983-01-27 Wacker-Chemie GmbH, 8000 München Process for the treatment of organic fibers and the organopolysiloxane compositions used therein

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418162A (en) * 1963-12-07 1968-12-24 Shinetsu Chem Ind Co Composition of waterproof agent and process for manufacture of waterproof cloth using the same
US4007305A (en) * 1974-12-23 1977-02-08 Basf Wyandotte Corporation Method of imparting nondurable soil release and soil repellency properties to textile materials
US4077770A (en) * 1976-07-15 1978-03-07 Rouvellat Richard A Textile cleaning process including soil-repellent finish

Also Published As

Publication number Publication date
CA1132860A (en) 1982-10-05
FR2436799B1 (en) 1984-08-10
GB2043131A (en) 1980-10-01
NO793065L (en) 1980-03-26
BE878963A (en) 1980-03-24
FR2436799A1 (en) 1980-04-18
JPS55500679A (en) 1980-09-18
GB2043131B (en) 1983-05-18
IT7968864A0 (en) 1979-09-25
IT1119176B (en) 1986-03-03

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