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

Definitions

• the present invention relates to a method for improving the physical properties of leather.
• the present invention relates to a treatment method for improving various physical properties of leather, such as flexibility, strength, workability, solvent resistance, heat resistance, and heat resistance. It is something.
• tanning includes chrome tanning, tannin tanning, aldehyde tanning, alum tanning, holmalin tanning, and various other methods.
• fattening agents used in finishing for example, animal oils, vegetable oils, and other oils such as spindle oil, machine oil, and norafin Mineral oil is also used where appropriate. Therefore, even when leather is manufactured from the same raw leather, the physical properties of leather as a product depend on the combination of the processing methods and the degree of processing. I'm going to change it in various ways.
• leather having excellent physical properties such as flexibility, moldability, water resistance, heat resistance, and strength is produced. It was impossible.
• leather with excellent flexibility had a drawback such as low tensile strength, and leather with high tensile strength had lack strength, such as lack of flexibility. .
• the purpose of the invention is to provide a new method of improving the physical properties of leather to eliminate these conventional problems.
• the strength of the leather can be improved and the leather can be made more flexible.
• the softened and processed leather does not become hard even if it is washed with water or organic solvents.
• the leather becomes plastic, which facilitates shaping and general processing, further improves the heat resistance, and makes it harder to produce.
• the present invention is characterized in that leather is immersed in a 1 to 30% by weight aqueous solution of a compound represented by the formula (1) and treated.
• B is a residue of a compound having 1 to 22 stiff active hydrogen
• OA and AO are C 2 to C 4 , respectively.
• X represents a C j_ to a mixture of a gilen group alone or a mixture thereof.
• b is an integer from 1 to 300, m and n are integers from 0 to 22 and m + n ⁇ 1.
• the residue of the compound having B, that is, 1 to 22 active hydrogens is a methyl alcohol or an ethyl alcohol.
• Chile-gathering records propylene-gearing records, butyl-gathering records, helicopter-gathering records, octopi Glycos such as long-call, do-not-re-call, low-deco-recall, octa-recall, etc.
• Tools glycerin, trimethylol propane, pentantriol, elistriol, pentaerystriol , Zigglycerin, polyglycerin, dipentaerythritol, solvitol, solvitan, solvade,
• Polyols such as source, flux, mannose, xylose, tray, mouth, etc .
• Partial or central part of colleagues or polyols Partial or central part of colleagues or polyols.
• CMPI Polyammines such as tetraethylentamine, triethylentetramine, octadecylamine, and pyrenedimine; Ammonia; cinnamate, acid, propionic acid, acid, capric acid, cabulinic acid, rauronic acid, myristic acid, palmitic acid Acids, stearic acid, behenic acid, oleic acid, linoleic acid, hydroxystearic acid, acrylic acid, methacrylic acid , Itaconic acid, oxalic acid succinic acid, maleic acid, fumaric acid, cephalic acid, adipic acid, carboxylic acid, tartaric acid, lingic acid, Caleponic acids such as citric acid, benzoic acid, salicylic acid, and phthalic acid; fures, cresols, butyrphenols, octyls Le Hueno Nonylphenol, dinonylylphenol, st
• Compounds represented by the above general formula (I) include compounds having B as a residue, such as ethylene oxide, pi pyrenoxide, and petiten ogiside.
• B a residue
• One or two or more compounds selected from the group consisting of cyanide and tetrahydro ' ⁇ -furan are added to the active hydrogen by a 1- to 300-mol addition reaction. Gained by letting them
• the compound represented by the general formula (I) is effective in improving the physical properties of leather, even if it is one kind, but it is more excellent by combining two or three kinds. It shows the improvement effect.
• a polyethylene glycol having a molecular weight of 150 to 25,000 is used as an aqueous solution of 1 to 20% by weight
• a very soft leather can be obtained.
• polypropylene glycol is used in combination with this at a concentration of 0.2 to .10% by weight
• a leather having more flexibility can be obtained.
• Polyacrylic glycol monoacrylate or monomethacrylate at a concentration of 0.001 to 1% by weight can be used to produce leather. As the color becomes brighter, the dyeing properties are also improved.
• the anionic surfactant is added to an ice solution of the compound represented by the general formula (I) in an amount of 0.01 to 1% by weight. Accordingly, the treatment liquid can be quickly and uniformly penetrated into the leather to be treated, and the treatment effect can be improved.
• the anionic surfactant include argyl ruic acid ester, alkylaryl sulfonate, and sulfo succinate ester. Sulfuric acid ester salts and sulfonates, such as salts, are superior, and these can be used as appropriate.
• the leather is immersed in the above-mentioned processing solution, but the processing temperature is preferably in the range of 0 to 50 ° C.
• the reaction speed due to the treatment is reduced and is not practical, and when the treatment temperature is higher than 50 ° C, the leather to be treated is deteriorated. I don't like it.
• the ⁇ ⁇ of the treatment liquid is preferably in the range of 3.8 to 11.4. Outside this range, the leather may be deteriorated, and a good treatment effect is obtained. I can't get it
• the processing time usually requires at least 6 hours, and the leather must be immersed in the leather for at least 30 minutes.
• the type, thickness, presence or absence of tanning varies greatly depending on the finishing treatment, etc., so it is only necessary to set a preliminary test appropriately. If the treatment time is too short, a sufficient treatment effect cannot be obtained, and if the treatment time is too long, the treatment will deteriorate the leather. .
• the leather treated in the above-mentioned manner is then washed with water to remove the solution-treated components and foreign substances, and then de-iced and dried. In this treatment, the untanned leather component in the leather to be treated is hydrolyzed or liberated and separated and eluted as contaminants. ⁇ As a result, the hardening due to water, water, etc., which is seen in conventional leather, and the formation of water are eliminated, and the mechanical leather is softened, heat resistant, moldable, extensible, Various properties of weather resistance are improved.
• the leather that can be treated by the method of the present invention may be any tanned leather.
• a force S can be applied.Therefore, after treating the floor covering to make it flexible, a silver surface is provided.
• the processing conditions for leather were as follows.
• the leather was removed from the treatment liquid, washed sufficiently with water, and then dehydrated and dried.
• the leather treated in this way became more flexible than the untreated leather.
• the physical properties of the above-mentioned leather were measured in accordance with JISK 550.
• the results are shown in Table 2 and Table 3.
• the numerical values in the table are average values of the measured values of the leather fiber in the vertical and horizontal directions.
• the degree of softening (outside of the JIS test items) was obtained by sensually evaluating the softness of the leather after the treatment, so that "ten” became flexible and "ten". + + “Indicates that the degree of softening is particularly good.
• * leather treated by the method of the invention is soft. It can be seen that the tensile strength and the tear strength have been improved despite the increase in the elongation rate.
• Monomethacrylate 180 0.05 0.1 0.05 0.1 0.03 0.05 ⁇ Top 400 0.03
• the method of improving the physical properties of leather according to the present invention improves the physical properties of leather, which has conventionally had various disadvantages, and provides good flexibility and processing. , Extensibility, water-resistance, solvent-resistance, etc., so that it can be used to produce clothing, bags, vehicles, footwear and other various leather goods. It is useful.

Landscapes

• 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)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=11713328

Family Applications (1)

Country Status (2)

Families Citing this family (2)

Citations (2)

Family Cites Families (1)

• 1982
  • 1982-01-23 JP JP917982A patent/JPS58127800A/ja active Granted
• 1983
  • 1983-01-24 WO PCT/JP1983/000019 patent/WO1983002627A1/ja not_active Ceased

Patent Citations (2)

Also Published As

Similar Documents

Legal Events