GB530643A - Improvements in or relating to the tanning of skins - Google Patents

Improvements in or relating to the tanning of skins

Info

Publication number
GB530643A
GB530643A GB17677/39A GB1767739A GB530643A GB 530643 A GB530643 A GB 530643A GB 17677/39 A GB17677/39 A GB 17677/39A GB 1767739 A GB1767739 A GB 1767739A GB 530643 A GB530643 A GB 530643A
Authority
GB
United Kingdom
Prior art keywords
tanning
polymers
acid
methacrylic acid
styrene
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
Application number
GB17677/39A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB530643A publication Critical patent/GB530643A/en
Expired legal-status Critical Current

Links

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
    • C14C3/00—Tanning; Compositions for tanning
    • C14C3/02—Chemical tanning
    • C14C3/08—Chemical tanning by organic agents
    • C14C3/22—Chemical tanning by organic agents using polymerisation products

Abstract

530,643. Tanning. DU PONT DE NEMOURS & CO., E. I. June 16, 1939, No. 17677. Convention date, June 16, 1938. [Class 76] [Also in Group IV] Skins are tanned to form white leather by treatment with acidic polymers of α-unsaturated aliphatic carboxylic acids, including inter-polymers of such acids with other polymerizable substances. Tanning is preferably carried out at room temperature by drumming the skins with aqueous solutions of the polymers having a pH of 4.8 to 6.4. After penetration of the solution into the skins, the rate of tanning is accelerated by lowering the pH to 3.4 to 4.2 by the addition of lactic, hydrochloric, sulphuric, acetic, phosphoric, sulphamic, or formic acid. The agents may be used in conjunction with vegetable or chrome tanning agents, aluminium sulphate, or synthetic agents containing sulphonic groups ; white pigments may be added to the tanning bath. Examples describe the tanning of goatskins and calfskins using polyacrylic acid, polymethacrylic acid, and interpolymers of acrylic acid :and methacrylic acid, maleic anhydride and styrene, methacrylic acid and styrene, and methacrylic acid and methyl methacrylate. Other suitable agents are polymerized ethyl acrylic acid and interpolymers of acrylic acid and styrene; maleic anhydride, methacrylic acid and styrene; and methacrylic acid with maleic anhydride, diethyl fumarate, butadiene, vinyl acetate, dichlorethylene, indene, vinyl chloride, vinyl chloracetate, or methacrylamide. The polymers may be prepared from the monomers by heating in the presence of benzoyl peroxide, by heating in toluene solution (which may contain carbon tetrachloride) under reflux or in an autoclave, either with or without benzoyl peroxide, by adding to hot water which may contain methylated starch, or by exposure to ultra-violet light: The acidic polymers may also be prepared by the partial or complete hydrolysis of polymers or interpolymers of derivatives of the acids, e.g., esters, amides, or nitriles; for example the methyl methacrylate polymer prepared according to Specification 427,494, [Group IV], may be dissolved in benzene and hydrolysed with alcoholic potash solution.
GB17677/39A 1938-06-16 1939-06-16 Improvements in or relating to the tanning of skins Expired GB530643A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US530643XA 1938-06-16 1938-06-16

Publications (1)

Publication Number Publication Date
GB530643A true GB530643A (en) 1940-12-17

Family

ID=21981697

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17677/39A Expired GB530643A (en) 1938-06-16 1939-06-16 Improvements in or relating to the tanning of skins

Country Status (1)

Country Link
GB (1) GB530643A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942930A (en) * 1958-11-07 1960-06-28 Fred P Luvisi Alum tannage
US2956854A (en) * 1954-08-13 1960-10-18 Bohme Fettchemie Gmbh Hide tanning process with salt of polymeric acid resinous condensate of organic-oxo and organic nitrogen compounds
FR2354383A1 (en) * 1976-06-12 1978-01-06 Bayer Ag TANNING PROCESS WITH A CARBOXYLIC ACID CARRYING AN ESTER AND / OR URETHANE AND / OR AMID FUNCTION
FR2463810A1 (en) * 1979-08-24 1981-02-27 Rhone Poulenc Ind Hide tanning compsn. contg. aluminium salt - and poly(meth)acrylic! acid, giving hide with good suppleness and bulk (BR 4.3.81)
US4596581A (en) * 1982-01-16 1986-06-24 Basf Aktiengesellschaft Carboxyl- and amino-containing copolymer for after-tanning mineral tanned leather

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956854A (en) * 1954-08-13 1960-10-18 Bohme Fettchemie Gmbh Hide tanning process with salt of polymeric acid resinous condensate of organic-oxo and organic nitrogen compounds
US2942930A (en) * 1958-11-07 1960-06-28 Fred P Luvisi Alum tannage
FR2354383A1 (en) * 1976-06-12 1978-01-06 Bayer Ag TANNING PROCESS WITH A CARBOXYLIC ACID CARRYING AN ESTER AND / OR URETHANE AND / OR AMID FUNCTION
FR2463810A1 (en) * 1979-08-24 1981-02-27 Rhone Poulenc Ind Hide tanning compsn. contg. aluminium salt - and poly(meth)acrylic! acid, giving hide with good suppleness and bulk (BR 4.3.81)
US4596581A (en) * 1982-01-16 1986-06-24 Basf Aktiengesellschaft Carboxyl- and amino-containing copolymer for after-tanning mineral tanned leather

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