Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
  • D06L1/02—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents
  • D06L1/04—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents combined with specific additives
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/0036—Soil deposition preventing compositions; Antiredeposition agents
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
  • D06L1/02—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents
  • D06L1/06—De-sizing

Definitions

• the present invention relates to a process for dry cleaning and desizing of textiles, with the aim of preventing dirt from being redeposited on a substrate. in natural, artificial, synthetic fibers or in a mixture of these same fibers and thus, maintain in suspension in the liquid bath during cleaning or de-sizing, the soiling of this substrate.
• the subject of the invention is also a composition based on perchlorethylene for dry cleaning and desizing of textiles, with the aim of preventing soiling of a substrate from being redeposited on this substrate. It is well known that during dry cleaning or sizing operations using perchlorethylene, woven or knitted textiles, the dirt extracted from the textiles tends to redeposit on these same textiles, especially when the perchlorethylene is not regenerated regularly, which accentuates the phenomenon of "graying" of textiles, more easily observed on white or light-colored fabrics.
• the Applicant has surprisingly found that redeposition of soiling can be very substantially reduced by the use, in suitably stabilized perchlorethylene, of at least one nitrile chosen from the group of those having a boiling point. less than or equal to 130 ° C under normal pressure, and of those forming with perchlorethylene an azeotrope whose boiling temperature is less than or equal to 130 ° C
• the subject of the invention is therefore a process for the anti-redeposition of soiling during dry cleaning or de-sizing using suitably stabilized perchlorethylene, a process characterized in that to observe the desired effect of limiting the phenomenon of Textile "graying" is added to the stabilized perchlorethylene and / or to the dry-cleaning or desizing bath, a sufficient quantity of at least one nitrile chosen from the group of those having a boiling point not exceeding 130 ° C and, preferably, from 95 to 120 ° C, and those forming with perchlorethylene an azeotrope whose boiling point is less than or equal to 130 ° C and, preferably, greater than 80 ° C.
• nitriles can be chosen from those represented by the general formula: wherein R may represent an alkyl group C 1 -C 5 alkenyl, C 2 _ C 6 cycloalkyl or C 3 -C 5.
• R may represent an alkyl group C 1 -C 5 alkenyl, C 2 _ C 6 cycloalkyl or C 3 -C 5.
• the desired anti-redeposition effect is observed by using proportions which may vary depending on the nitrile considered.
• the most effective nitriles such as acetonitrile and propionitrile, exert an appreciable anti-redeposition effect from a content of 0.2% by weight in perchlor. ethylene, while for others, such as chloracetonitrile, the optimum effect is observed at contents of approximately 6% by weight.
• Perchlorethylene can be stabilized by any suitable stabilizing agent, in particular those compatible with the presence of the nitriles defined above, and such as, inter alia, and without the following list of components being limiting: butylene oxide, triethylamine, tert-butanol, N-methylpyrrqle, n-butanol, diisobutylene, isopropyl acetate, and epichlorohydrin, taken separately or as a mixture of at least two of these compounds.
• suitable stabilizing agent in particular those compatible with the presence of the nitriles defined above, and such as, inter alia, and without the following list of components being limiting: butylene oxide, triethylamine, tert-butanol, N-methylpyrrqle, n-butanol, diisobutylene, isopropyl acetate, and epichlorohydrin, taken separately or as a mixture of at least two of these compounds.
• the anti-redeposition process according to the invention may also include the addition of products commonly used in dry cleaning, such as for example cleaning enhancers represented by anionic, cationic or nonionic surfactants, such as: alkylsulfonates, alkylarylsulfonates, more particularly Ca dodecyl benzene sulfonate, fatty alcohol and fatty acid athoxylation products, fatty alcohol sulfates, petroleum sulfonates, alkyl polyglycol ethers, alkylphenol polyglycol ethers, more particularly nonylphenol oxyethylenated with 12 moles of ethylene oxide, brightening agents, primers, anti-static agents and water-repellent agents.
• cleaning enhancers represented by anionic, cationic or nonionic surfactants, such as: alkylsulfonates, alkylarylsulfonates, more particularly Ca dodecyl benzene sulfonate, fatty alcohol and fatty
• the process of the invention can comprise the addition of water in proportions which can range up to approximately 5-6%, and more particularly from 2 to 3% by weight relative to the textiles themselves, and / or by commercial cleaning boosters which contain between 4 and 30% and, usually, from 8 to 14% of their weight of water.
• additional amounts of water are added (approximately 2 to 4% by weight relative to the textiles to be cleaned) to the cleaning bath containing the reinforcers in order to improve the cleaning effect vis-à-vis so-called "lean” stains ".
• a subject of the invention is also a composition or a bath useful in dry cleaning, or desizing of textiles for prevent "graying" or redeposition of dirt on textiles made of natural, artificial, synthetic or mixed fibers, even during dry cleaning or desizing, using suitably stabilized perchlorethylene, containing evenly water up to 6% ar in relation to the textiles to be treated and the usual additives, more particularly cleaning enhancers and anti-static agents, each of these additives may be present, at a rate of 1 to 10 g per liter of said composition, which is characterized by the the fact that it contains, in addition to perchlorethylene and its appropriate stabilizing agents, from 0.2 to 6% - and, preferably, between 1 and 2.5% by weight relative to the said composition of at least one selected nitrile in the group of those having a boiling point less than or equal to 130 ° C and, preferably, from 95 to 120 ° C, and of those forming with perchlorethylene an azeotrope whose boiling point is less than or equal to 130 ° C
• the nitrile can be chosen from those represented by the general formula: in which R is defined as indicated above.
• nitriles corresponding to this general formula By way of examples of nitriles corresponding to this general formula, mention may be made, among others, of the following compounds taken separately or as a mixture of at least two of them. acetonitrile, butene-3 nitrile, cis and trans-crotononitrile, butyronitrile, isobutyronitrile and valerronitrile.
• propionitrile is used as the nitrile.
• the samples of white textiles used were as follows: - 100% polyester at 268 g / m2
• the apparatus was set to 100 for each untreated original fabric, and the reflectance of each "gray" sample was measured.
• the grayscale is all the more weak as the reflectance is closer to 100.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Detergent Compositions (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

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ID=9213881

Family Applications (1)

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Citations (3)

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• 1978
  • 1978-10-18 FR FR7829633A patent/FR2439256A1/fr active Granted
  • 1978-10-27 BE BE191419A patent/BE871620A/xx not_active IP Right Cessation
  • 1978-10-28 DE DE2846983A patent/DE2846983C3/de not_active Expired
  • 1978-10-30 CA CA314,864A patent/CA1102512A/fr not_active Expired
  • 1978-10-31 WO PCT/FR1978/000038 patent/WO1980000855A1/fr unknown
  • 1978-10-31 IT IT51714/78A patent/IT1157392B/it active
  • 1978-10-31 JP JP54500106A patent/JPS6149426B2/ja not_active Expired
  • 1978-11-02 NL NL7810928A patent/NL7810928A/nl not_active Application Discontinuation
  • 1978-11-02 CH CH1131278A patent/CH635881A5/fr not_active IP Right Cessation
  • 1978-11-02 GB GB7843039A patent/GB2031940B/en not_active Expired

Patent Citations (3)

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