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
GB2071655A
Inventor
Walter Joseph Hutton
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.)
C and J Clark Ltd
Original Assignee
C and J Clark Ltd
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 C and J Clark LtdfiledCriticalC and J Clark Ltd
Priority to GB2071655ApriorityCriticalpatent/GB839360A/en
Publication of GB839360ApublicationCriticalpatent/GB839360A/en
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
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Chemical & Material Sciences
(AREA)
Chemical Kinetics & Catalysis
(AREA)
General Chemical & Material Sciences
(AREA)
Organic Chemistry
(AREA)
Treatment And Processing Of Natural Fur Or Leather
(AREA)
Abstract
839,360. Waterproofing leathers. CLARK Ltd., C. & J. Oct. 12, 1956 [July 18, 1955], No. 20716/55. Class 140. Tanned leather is waterproofed by treatment with dispersions or solutions for example in isopropanol or methanol, of primary or secondary aliphatic amines having at least 12 C atoms, such as stearyl-, dodecyl-, or dioctylamine, together with a cross-linking agent such as formaldehyde, glyoxal, or crotonaldehyde, which binds the amine to the leather. The two materials may be used together or in succession and with or without an acid or an alkaline catalyst such as sulphuric acid on caustic soda. Treatment is effected with. moderate heating, e.g. to. above 50‹ C.
GB2071655A1955-07-181955-07-18Improvements relating to the waterproofing of leather
ExpiredGB839360A
(en)
Procedure for treatment of polyacrilonitril and its copolymer, to allow its dyeing by acid dyes (Machine-translation by Google Translate, not legally binding)