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Leather fat and fatliquor application
Release Date：2017-5-9 Source：xiashundong Views：1776
Fat is an important process in the processing of leather, it can give the finished leather to soft, plump, flexible and other excellent feel and greatly improve its physical properties. Leather fatliquoring agent generally by the emulsifier, neutral oil, fat additives. Leather fat and fat for the more fat and fat, fat material in the neutral oil emulsified emulsified into the finished leather interior, in which the fat (or modified fat) and the proportion of emulsifier and the type of active groups plus The effectiveness of fat has a considerable impact.
Leather fatliquor classification methods are many, but generally can be divided into two categories, one is synthetic fatliquor, the other is a complex, functional fatliquor, but the product composition and function In recent years, more fatliquors towards compound, functional development.
1, synthetic fatliquor
The main raw material for synthetic fatliquors is petroleum and petrochemicals. The former is paraffin, mineral oil, the latter is fatty acids, fatty acid esters, fatty amides and fatty alcohols. Synthetic methods include: sulfonation, sulfation, chlorination, chlorination, etc., can be sulfonyl chloride, aliphatic amide, etc., its products have a good combination of leather, light and mercerizing performance.
2, compound type, functional fatliquor
2.1 combination of fatliquor
After the eighties, the rise of the domestic development of a combination of fatliquor boom, the so-called combination of fatliquor is a variety of active base with leather collagen or leather on the permanent combination of chromium ions, thereby reducing the loss of grease in the leather. Binding fatliquor is generally introduced in the fat molecules can be combined with the leather active base, the use of oil and alkyl alcohol amine reaction, and then introduced carboxyl, sulfonic acid method. Resistance to dry cleaning fatliquor is mainly based on the high activity of alkyl alcohol amide based on. In the country, Liu Yisheng, who first use vegetable oil amide, esterification method to produce hydroxyethyl fatty acid amide succinate sulfonate type combination fatliquor, fat after fullness, leather surface, , Silk light sense of good, strong combination. After this synthesis method has used castor oil, cottonseed oil and other raw materials synthesized RCF combined fatliquor, CM-1 combination of fatliquor and other products to meet the domestic demand for a combination of fatliquor. However, in terms of the most common application of SCF fatliquoring agents, the poor emulsification of the grease, the low resistance to electrolyte, and the poor penetration of defects also affect its performance. In view of the above problems, Li Ming using fatty acid methyl ester amide lactone introduction of carboxyl, sulfonation into the sulfonic acid group method of TCF combined compound fatliquor, the fat effect is outstanding, the product is good emulsification, The combination of leather absorption fast, full leather full, oily.
3 phospholipid fatliquor
Phospholipid fatliquoring agent is generally divided into two kinds: one is made of natural phospholipid directly with fatliquoring agent, such as Lvxu Yong and so on with sulfated castor oil, flat plus soy sauce combined with fatliquor, which is characterized by filling So that the plate was significantly thicker. Shen Yiding and other use of soybean phospholipids and mineral oil, modified mineral oil, high alcohol, soy alcohol amide prepared a multi-functional phosphoric acid fat agent, into a wax sense of leather, leather body soft, waterproof effect. In addition, other units in the country more than the use of complex synthesis of a variety of phospholipid fatliquor.
The other is the oil (mainly castor oil) phospholipid treatment, and then with the phospholipids and other additives with phosphate ester fatliquor. Such as Zheng Tao with castor oil and methanol for transesterification, phosphoric acid to do phosphorylating agent synthesis of phosphate-based products and other products used for leather fat, its oil lubricity, fullness ideal. On the oil phosphorylation modification, the domestic also with phosphorus pentoxide, but the control of the reaction has some problems. The polyesters are more prone to the synthesis of monoester-based alkyl phosphates, this structure treatment of leather fat, its flexibility, flexibility, water resistance is more assured.
4 contains silicone fatliquor
The introduction of silicone monomers in the fatliquors is mainly due to its good lubricity and water resistance. According to the introduction of silicone waterproof treatment of static water from the untreated 105% to 10-30% after treatment, dynamic flexion can reach more than 10,000 times, the leather showed good performance. Silicone treatment of oil Wang Bao and others are the vegetable oil modified with the terminal hydroxyl polysiloxane and then grafted, the leather by the fat there is a strong: "silicon sense." Zhang Zhongcheng with dimethyldichlorosilane and modified soybean oil grafting so that silicone in the leather fat due to its polarity and will not occur. The product used in suede, soft leather and other effects are obvious, into a soft leather, smooth, mercerizing sense and has a certain water resistance.
5 anti-electrolyte fatliquor
The anti-electrolyte of the fat-filled emulsion is based on the requirement of step-by-step fat. In the actual pickling, chrome tanning fatliquoring, fat emulsion need to have enough acid, anti-electrolyte stability. Chinas first application in the acid pickling, chrome tanning stage of the fat agent to cetyl trimethyl ammonium chloride, oil, oil, nonyl phenol polyoxyethylene ether cationic fatliquor or cationic / non-ion plus Grease. Such fatliquor in the use of acid, chromium-resistant tanning liquid characteristics. But because of the function of a single there have been some problems, such as poor absorption of poor role, and other fat, retanning materials with the use of bath problems. In view of the above problems in recent years, all units in the development of fatliquors have to be considered, the production of products also have their own characteristics.
First of all from the choice of raw materials are used directly on the synthesis, such as Li Ming in the development of acid-resistant multi-functional fatliquor using stearic acid and amino alcohol synthesis of weak cationic emulsifier, and then with non-ionic surfactant - polyolefin - chlorine Alkanes and other methods of compound, the product has a very wide range of PH use, leather fat after fullness, flexibility are good, suede silky. Guan Qi and others choose long-chain unsaturated fatty acids or their derivatives and polyethylene glycol esterification, and then sulfide also make the product has excellent performance. Qing Ning and others using dynamic, vegetable oil polyethylene glycol by ethoxylation, phosphorylation and sulfite synthesis of NAF fatliquor has excellent resistance to acid and electrolyte resistance, leather fat after the soft, plump, mercerizing , Good flexibility, by the way, the ability to adapt to the electrolyte mentioned in this article is also very good fatliquor, because a wide range of adaptations, prominent features, multi-functional fatliquor is currently the research.
6 complex, multi-performance fatliquor
Fatliquor to compound, multi-performance development is a direction. From the tannery industry to the demand for fatliquoring agent, fatliquors need more and better performance. Traditionally a single move, vegetable oil fatliquoring agent has been difficult to meet the requirements of high-grade leather. Compound fatliquor in the country has been recognized, have developed, produced a number of products. Such as OES complex fatliquor, S-4 fatliquor, SQ-1 compound fatliquor and so on. The composition of the raw materials is more than four kinds of fatliquoring components, basically a variety of animal and vegetable oils, synthetic esters and their sulfation, sulfonation, sulfite, mineral oil and chlorination, oxidation, ethoxylation, sulfon Chlorosylates, lignin esters and their derivatives, plus surfactants that alter the addition of lipids or increase emulsification, permeability, and other additives. Synthetic fatliquoring agents, anti-electrolyte fatliquoring agents mentioned earlier herein are also combinations of various components. Chen Mingyue SG series of leather fatliquoring agent used to achieve more than 15 components, the product of the performance of fat-absorbing.
Leather fatliquor classification methods are many, but generally can be divided into two categories, one is synthetic fatliquor, the other is a complex, functional fatliquor, but the product composition and function In recent years, more fatliquors towards compound, functional development.
1, synthetic fatliquor
The main raw material for synthetic fatliquors is petroleum and petrochemicals. The former is paraffin, mineral oil, the latter is fatty acids, fatty acid esters, fatty amides and fatty alcohols. Synthetic methods include: sulfonation, sulfation, chlorination, chlorination, etc., can be sulfonyl chloride, aliphatic amide, etc., its products have a good combination of leather, light and mercerizing performance.
2, compound type, functional fatliquor
2.1 combination of fatliquor
After the eighties, the rise of the domestic development of a combination of fatliquor boom, the so-called combination of fatliquor is a variety of active base with leather collagen or leather on the permanent combination of chromium ions, thereby reducing the loss of grease in the leather. Binding fatliquor is generally introduced in the fat molecules can be combined with the leather active base, the use of oil and alkyl alcohol amine reaction, and then introduced carboxyl, sulfonic acid method. Resistance to dry cleaning fatliquor is mainly based on the high activity of alkyl alcohol amide based on. In the country, Liu Yisheng, who first use vegetable oil amide, esterification method to produce hydroxyethyl fatty acid amide succinate sulfonate type combination fatliquor, fat after fullness, leather surface, , Silk light sense of good, strong combination. After this synthesis method has used castor oil, cottonseed oil and other raw materials synthesized RCF combined fatliquor, CM-1 combination of fatliquor and other products to meet the domestic demand for a combination of fatliquor. However, in terms of the most common application of SCF fatliquoring agents, the poor emulsification of the grease, the low resistance to electrolyte, and the poor penetration of defects also affect its performance. In view of the above problems, Li Ming using fatty acid methyl ester amide lactone introduction of carboxyl, sulfonation into the sulfonic acid group method of TCF combined compound fatliquor, the fat effect is outstanding, the product is good emulsification, The combination of leather absorption fast, full leather full, oily.
3 phospholipid fatliquor
Phospholipid fatliquoring agent is generally divided into two kinds: one is made of natural phospholipid directly with fatliquoring agent, such as Lvxu Yong and so on with sulfated castor oil, flat plus soy sauce combined with fatliquor, which is characterized by filling So that the plate was significantly thicker. Shen Yiding and other use of soybean phospholipids and mineral oil, modified mineral oil, high alcohol, soy alcohol amide prepared a multi-functional phosphoric acid fat agent, into a wax sense of leather, leather body soft, waterproof effect. In addition, other units in the country more than the use of complex synthesis of a variety of phospholipid fatliquor.
The other is the oil (mainly castor oil) phospholipid treatment, and then with the phospholipids and other additives with phosphate ester fatliquor. Such as Zheng Tao with castor oil and methanol for transesterification, phosphoric acid to do phosphorylating agent synthesis of phosphate-based products and other products used for leather fat, its oil lubricity, fullness ideal. On the oil phosphorylation modification, the domestic also with phosphorus pentoxide, but the control of the reaction has some problems. The polyesters are more prone to the synthesis of monoester-based alkyl phosphates, this structure treatment of leather fat, its flexibility, flexibility, water resistance is more assured.
4 contains silicone fatliquor
The introduction of silicone monomers in the fatliquors is mainly due to its good lubricity and water resistance. According to the introduction of silicone waterproof treatment of static water from the untreated 105% to 10-30% after treatment, dynamic flexion can reach more than 10,000 times, the leather showed good performance. Silicone treatment of oil Wang Bao and others are the vegetable oil modified with the terminal hydroxyl polysiloxane and then grafted, the leather by the fat there is a strong: "silicon sense." Zhang Zhongcheng with dimethyldichlorosilane and modified soybean oil grafting so that silicone in the leather fat due to its polarity and will not occur. The product used in suede, soft leather and other effects are obvious, into a soft leather, smooth, mercerizing sense and has a certain water resistance.
5 anti-electrolyte fatliquor
The anti-electrolyte of the fat-filled emulsion is based on the requirement of step-by-step fat. In the actual pickling, chrome tanning fatliquoring, fat emulsion need to have enough acid, anti-electrolyte stability. Chinas first application in the acid pickling, chrome tanning stage of the fat agent to cetyl trimethyl ammonium chloride, oil, oil, nonyl phenol polyoxyethylene ether cationic fatliquor or cationic / non-ion plus Grease. Such fatliquor in the use of acid, chromium-resistant tanning liquid characteristics. But because of the function of a single there have been some problems, such as poor absorption of poor role, and other fat, retanning materials with the use of bath problems. In view of the above problems in recent years, all units in the development of fatliquors have to be considered, the production of products also have their own characteristics.
First of all from the choice of raw materials are used directly on the synthesis, such as Li Ming in the development of acid-resistant multi-functional fatliquor using stearic acid and amino alcohol synthesis of weak cationic emulsifier, and then with non-ionic surfactant - polyolefin - chlorine Alkanes and other methods of compound, the product has a very wide range of PH use, leather fat after fullness, flexibility are good, suede silky. Guan Qi and others choose long-chain unsaturated fatty acids or their derivatives and polyethylene glycol esterification, and then sulfide also make the product has excellent performance. Qing Ning and others using dynamic, vegetable oil polyethylene glycol by ethoxylation, phosphorylation and sulfite synthesis of NAF fatliquor has excellent resistance to acid and electrolyte resistance, leather fat after the soft, plump, mercerizing , Good flexibility, by the way, the ability to adapt to the electrolyte mentioned in this article is also very good fatliquor, because a wide range of adaptations, prominent features, multi-functional fatliquor is currently the research.
6 complex, multi-performance fatliquor
Fatliquor to compound, multi-performance development is a direction. From the tannery industry to the demand for fatliquoring agent, fatliquors need more and better performance. Traditionally a single move, vegetable oil fatliquoring agent has been difficult to meet the requirements of high-grade leather. Compound fatliquor in the country has been recognized, have developed, produced a number of products. Such as OES complex fatliquor, S-4 fatliquor, SQ-1 compound fatliquor and so on. The composition of the raw materials is more than four kinds of fatliquoring components, basically a variety of animal and vegetable oils, synthetic esters and their sulfation, sulfonation, sulfite, mineral oil and chlorination, oxidation, ethoxylation, sulfon Chlorosylates, lignin esters and their derivatives, plus surfactants that alter the addition of lipids or increase emulsification, permeability, and other additives. Synthetic fatliquoring agents, anti-electrolyte fatliquoring agents mentioned earlier herein are also combinations of various components. Chen Mingyue SG series of leather fatliquoring agent used to achieve more than 15 components, the product of the performance of fat-absorbing.