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
  • C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
  • C14C9/02—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes using fatty or oily materials, e.g. fat liquoring
• • 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
  • C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes

Definitions

• the invention in contrast, is a process for the production of waterproof leather and furs by tanning, retanning, dyeing, greasing and fixing, with the aid of copolymers containing carboxyl groups, characterized in that one after the tanning and optionally dyeing in the same bath in succession as a fatliquor (A) oxidized or oxidized and partially sulfated long-chain C18 - C26 hydrocarbons or C32 - C40 waxes, and as impregnating agent (B) copolymers of 60-95 mol% acrylic acid and / or methacrylic acid and 5-40 mol% of the methyl , Ethyl, propyl or butyl ester, amide or nitrile of acrylic acid or methacrylic acid with a molecular weight of 800-10,000, in the form of the alkali, ammonium or amine salts, and then acidified, fixed and finished.
• A oxidized or oxidized and partially sulfated long-chain C18
• the process is carried out using raw hides or skins which are tanned and retanned in the customary manner, inorganic and / or organic, natural or synthetic tanning agents, such as chromium or aluminum salts, or phenol / naphthalene condensation products, or vegetable tanning agents, be used.
• inorganic and / or organic, natural or synthetic tanning agents such as chromium or aluminum salts, or phenol / naphthalene condensation products, or vegetable tanning agents, be used.
• As fatliquoring agents (A) according to the invention oxidized or oxidized and partially sulfonated long-chain C18 - C26 hydrocarbons or C32 - C40 waxes in an amount of 3 - 8% by weight, based on the shaved weight of the leather.
• the products have acid numbers of 5-100 and optionally SO 3 contents of 0.2-2.0% by weight.
• fatliquors examples include sulfoxidized C20-C22 paraffin wax with an SO 3 content of 0.2-0.5% by weight and acid numbers of 5-15, oxidized and sulfated C24-C26 polyethylenes or paraffins with an S03 Content of 0.3-0.8% by weight and acid numbers of 5-20, and oxidized C22-C26 paraffin with acid numbers of 60-70.
• the products are preferably in the form of their alkali metal, ammonium or amine salts applied.
• the fatliquoring agents are preferably used in combination with special W / 0 emulsifiers such as C12 - C18 monoalkyl phosphoric acid esters, C16 - C20 alkenyl succinic acids, fatty acid arcosides, citric acid fatty alcohol monoesters, also fatty acid monoethanolamide ether sulfates or fatty acids, in the form of the alkali metal, ammonium or amine salts .
• W / 0 emulsifiers such as C12 - C18 monoalkyl phosphoric acid esters, C16 - C20 alkenyl succinic acids, fatty acid arcosides, citric acid fatty alcohol monoesters, also fatty acid monoethanolamide ether sulfates or fatty acids, in the form of the alkali metal, ammonium or amine salts .
• copolymers are preferably used as 70-85 mol% of acrylic acid and / or methacrylic acid with 15-30 mol% of the methyl, ethyl, propyl or butyl ester or amide or nitrile of acrylic acid or methacrylic acid in the form of the alkali metal, ammonium or amine salts.
• the molecular weight of the copolymers is 800-10,000. Based on the shaved weight of the leather, 0.5-3% by weight of copolymers are used.
• Suitable copolymers are products based on 75 mol% of acrylic acid and 25 mol% of ethyl acrylate, sodium salt, 85 mol% of acrylic acid and 15 mol% of acrylonitrile, ammonium salt and 70 mol% of acrylic acid and 30 mol% of acrylamide, Na salt.
• limed, decalcified, pickled and pickled pelts are chrome-tanned and folded to approx. 2.8 mm. After washing with 200% water at 25 ° C, neutralized against bromine - cresol green.
• the coloring and greasing is done according to the following procedure
• soft leather After completion, soft leather is obtained which also has a much better behavior towards water in case A than in case B.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Treatment And Processing Of Natural Fur Or Leather (AREA)
• Soil Working Implements (AREA)
• Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
• Supports For Pipes And Cables (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=6190223

Family Applications (1)

Country Status (8)

Cited By (2)

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Citations (4)

Family Cites Families (7)

• 1983
  • 1983-02-08 DE DE19833304120 patent/DE3304120A1/de not_active Withdrawn
  • 1983-09-08 US US06/530,244 patent/US4527992A/en not_active Expired - Fee Related
• 1984
  • 1984-01-05 CA CA000444712A patent/CA1207954A/fr not_active Expired
  • 1984-01-13 FI FI840131A patent/FI840131A7/fi not_active Application Discontinuation
  • 1984-02-01 AT AT84101000T patent/ATE23366T1/de not_active IP Right Cessation
  • 1984-02-01 DE DE8484101000T patent/DE3461200D1/de not_active Expired
  • 1984-02-01 EP EP84101000A patent/EP0118023B1/fr not_active Expired
  • 1984-02-07 BR BR8400513A patent/BR8400513A/pt unknown
  • 1984-02-08 ES ES529550A patent/ES529550A0/es active Granted

Patent Citations (4)

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