Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2525—Coating or impregnation functions biologically [e.g., insect repellent, antiseptic, insecticide, bactericide, etc.]

Definitions

• This invention relates to a process for producing rotresistant organic fibrous materials and to the products so produced. More specifically, it deals with the application of solutions or emulsions, of certain organolead compounds having the formula R PbS-R to hydrophilic, organic fibrous materials.
• the resultant treated products have improved resistance to microbiological degradation, are not discolored, and retain their chemical properties. Most important, they have exceptional resistance to physical damage.
• fibrous organic material includes any hydrophilic fibrous material, i.e., organic materials which absorb or adsorb water, such as cotton, viscose rayon, cuprammonium rayon, ramie, jute, wool, paper, paperboard, and the like, including their chemical and/ or physical modifications, which may be impregnated with a liquid, and dried. They may be in the form of free fibers, sliver, yarn, thread and woven or nonwoven fabrics. We prefer the use of spun textiles such as threads or woven fabrics.
• rot-resistant relates to bactericidal chemicals which when present in the fibrous materials are capable of destroying or retarding the action of organisms which normally destroy (rot) hydrophilic, organic fibrous materials. Without the aid of such bactericidal chemicals, desized, scoured, and bleached cotton fabrics, or greige goods, are completely destroyed in soil-burial tests in about two to four days. This will be discussed more fully in an example below.
• the fibrous organic materials may be processed by conventional techniques employing conventional equipment.
• the chemical which provides resistance to biological degradation should be one which is easily and simply applied; it should be capable of protecting the fibrous organic material from destructive organisms or be capable of destroying these organisms at low concentrations of the chemical; it must maintain this activity over long periods of time; it must not discolor or' physically damage the fibrous material; and it must be compatible with colorants deposited on, and in, the fibrous organic (textile) material for decorative or other purposes, such as waterproofing.
• the process is simple and easily applied. Low concentrations of the organolead compounds serve to completely and quickly destroy or retard the highly active cellulose destroying organisms and obviate the problem of undesirable color, toxicity, or loss of strength.
• organolead compounds have the formula R PbSR where R may be alkyl, aryl, cycloalkyl, or combinations of these. Examples of such compounds are triphenylthiomethyllead, triphenylthioethyllead, triphenylthiopropyllead, triphenylthiobenzyllead, and triphenylthiophenyllead.
• organolead compounds may be prepared by conventional chemical means. Excellent results are obtained when the material is impregnated with 0.1 to about 5.0 weight percent of the R PbS-R solutions and the pickup is about 60 to 120 weight percent.
• the organolead compound may be dissolved in an aqueous medium such as ethanol or isopropanol to give concentrations ranging from about 1 to 10 weight percent.
• an aqueous medium such as ethanol or isopropanol
• certain nonaqueous solvents such as toluene, mineral spirits, carbon tetrachloride, chloroform and the like are satisfactory solvents.
• the aqueous or nonaqueous lead solutions may be used as such or the nonaqueous solutions of lead may be emulsified to form emulsions.
• These emulsions maybe oil-in-water, or water-in-oil types. They may comprise surface active agents, water repellents, resins, and colorants.
• the solutions or emulsions may be applied by other conventional methods known to those skilled in the art such as spraying, dipping, etc.
• Impregnating the fibrous material The organic fibrous material is then impregnated with the R PbSR solution, by passing the fibrous material into, and through, the R PbSR solution.
• the excess organolead solution is then removed by passing the impregnated material through squeeze or padder rolls to remove excess solution. Amounts remaining in the wet fabric may vary from about 60 to 110% on the weight of the dry fabric. We prefer about 80 to 100 weight percent pickup, or the proper pickup to give 0.1 to about 5.0 weight percent of the R PbSR on the weight of the dry fibrous material.
• the impregnated material is then dried by conventional textile methods.
• the exact temperature range will depend upon the solvent, the lower temperatures being more suitable for the lowerboiling solvents. If the R Pb-1R is present as a resinous emulsion, higher temperatures from about 130 to 160 C. may be required to cure and fix the resin.
• the textile materials so treated have retained essentially 100% of their strength during the test periods, are not discolored, and their chemical properties remain unchanged.
• the treated organic fibrous materials are then tested by burial in soil containing highly active cellulose-destroying organisms and samples are removed at various interva for testing using the AATCC Standard Method 30-l957 T-B-3. The following tests were made on desized, scoured, and bleached 54 x 48 cotton fabric. The results follow:
• EXAMPLE 1 Samples of untreated, desized, scoured, and bleached 54 x 48 cotton fabric were placed in a rot bed and inspected daily. After 2 days, the untreated fabric showed signs of deterioration (spots) and after 4 days had com pletely disintegrated.
• EXAMPLE 2 Two grams of thiomethyltriphenyllead was dissolved in 198 g. of ethanol. Portions of desized, scoured, and bleached cotton fabric were immersed in this bath and passed through adjustable squeeze rolls set at a high pressure to give a pickup of about 100 weight percent. The fabric was then air dried at an air temperature of about 85 C. After a soil burial test for 42 days, the treated material retained essentially 100% of its original strength.
• EXAMPLE 3 Twelve and one half grams of thiopropyltriphenyllead was dissolved in 237.5 g. of chloroform. Portions of cotton fabric were padded with this solution in the same manner as in Example 2. The fabric was still retaining 100% of its strentgh after 70 days of soil burial.
• EXAMPLE 4 Eight grams of thiomethyltriphenyllead was dissolved in 192 g. of chloroform. A portion of the cotton textiles used in Example 1 was treated with this solution in the same manner as in Example 2. The sample was then leached with tap water for 24 hours (see AATCC Method 30-1957-T-C-1). The fabric still retained 100% of its strength after 56 days of soil burial.
• EXAMPLE 5 Nine grams of thioethyltriphenyllead was dissolved in 291 g. of chloroform. The fibrous cellulosic material treated with this solution still retained 100% of its strength after 70 days of soil burial.
• EXAMPLE 7 A 4.6 percent solution of thiopropyltriphenyllead was prepared in ethanol. This solution was used to impregnate portions of the desized, scoured, and bleached cotton fabric of Example 1 and squeezed to give a wet pickup of 100 weight percent on the dry fabric. After 56 days in the soil burial test bed, the breaking strength was still essentialy 100%.
• EXAMPLE 8 A solution containing 0.5 g. thioethyltriphenyllead in 99.5 g. ethanol was used to impregnate desized, scoured, and bleached 54 x 48 cotton fabric. The excess was removed by means of a pair of squeeze rolls to give a pickup of 100 percent on the weight of the dry fabric. The wet fabric was dried at an air temperature of about 85 C., and after a soil burial test of 14 days, still retained its original breaking strength.
• a process for rendering organic fibrous materials rot-resistant comprising the steps:
• thioorganolead compound having the formula R PbSR where R is at least one member of the group consisting of alkyl, aryl, and cycloalkyl;
• thioorganolead compound is at least one member of the group consisting of thiomethyltriphenyllead, thioethyltriphenyllead, and thiopropyltriphenyllead.
• a process for rendering organic fibrous materials rot-resistant comprising the steps:
• nonaqueous solvent is selected from the group consisting of chloroform, pentane, hexane, and heptane and the thioor- 5 6 ganoleed compound is thiopropyltriphenyllead or thio- 3,183,118 5/ 1965 Conner 117--138.5 ethyltnphenyllead. 3,183,149 5/ 1965 Gonzales et a1.

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• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Paper (AREA)

Applications Claiming Priority (2)

Publications (1)

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Citations (7)

• 1966
  • 1966-04-29 US US3420701D patent/US3420701A/en not_active Expired - Lifetime
  • 1966-04-29 US US3420700D patent/US3420700A/en not_active Expired - Lifetime
• 1967
  • 1967-04-18 DE DE19671619100 patent/DE1619100A1/de active Pending
  • 1967-04-18 DE DE19671619101 patent/DE1619101A1/de active Pending
  • 1967-04-21 NL NL6705636A patent/NL6705636A/xx unknown
  • 1967-04-21 NL NL6705635A patent/NL6705635A/xx unknown
  • 1967-04-27 SE SE598567A patent/SE349070B/xx unknown
  • 1967-04-27 GB GB1946367A patent/GB1129899A/en not_active Expired
  • 1967-04-27 SE SE598667A patent/SE349071B/xx unknown
  • 1967-04-27 GB GB1946467A patent/GB1129900A/en not_active Expired
  • 1967-04-28 BE BE697816D patent/BE697816A/xx unknown
  • 1967-04-28 BE BE697815D patent/BE697815A/xx unknown

Patent Citations (7)

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