EP3374529A1 - Fatliquors polymer for increasing softness of skin during the tanning - Google Patents

Fatliquors polymer for increasing softness of skin during the tanning

Info

Publication number
EP3374529A1
EP3374529A1 EP16834127.9A EP16834127A EP3374529A1 EP 3374529 A1 EP3374529 A1 EP 3374529A1 EP 16834127 A EP16834127 A EP 16834127A EP 3374529 A1 EP3374529 A1 EP 3374529A1
Authority
EP
European Patent Office
Prior art keywords
ranging
general formula
alkenyl
alkyl
fatty
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.)
Pending
Application number
EP16834127.9A
Other languages
German (de)
French (fr)
Inventor
Giancarlo LOVATO
Michela PAGANIN
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.)
Corichem Srl
Original Assignee
Corichem Srl
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
Priority claimed from ITUB2015A005367A external-priority patent/ITUB20155367A1/en
Application filed by Corichem Srl filed Critical Corichem Srl
Publication of EP3374529A1 publication Critical patent/EP3374529A1/en
Pending 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
    • 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

Definitions

  • the present invention relates to the synthesis of polymeric fatliquors for increasing softness of skin during the tanning.
  • polymeric fatliquors allow obtaining an emulsion or a solution which remains stable during its transportation or its storage period, and that is strongly fixed to the leather, which does not allow being extracted, so that it is possible to wash the treated leather even in the5 washing machine.
  • main aim of the present invention is to obtain polymeric fatliquors able to confer a higher level of soft feeling in the treated skin in respect with the known polymeric fatliquors.
  • object of the invention is obtaining polymeric fatliquors able to confer to the treated skin a waxy feeling.
  • Another object of the invention is reduce the fogging of skin used for realizing finishing equipment for cars, so that the gravimetric fogging test results are next to zero.
  • an object of the invention is obtaining polymeric fatliquors able to confer to the skin the required lightness and comfort in order to be worn.
  • the subject of the invention is a polymeric fat based on a combination of a glycol polymer + maleic anhydride which was previously reacted with at least one among a fatty alcohol, an ethoxylated fatty alcohol, an ethoxylated fatty acid, a fatty ethoxylated amine and at least one amongst a sorbitol ester, a natural or synthetic glycerol monoester, a natural or synthetic glycerol diester, castor oil, ethoxylated castor oil, a modified lanolin fatty acid, lecithin, modified lecithin + sulfitation or phosphating or sulphation.
  • the polymeric fat may comprise fatty acids, natural and / or synthetic or ethoxylated glycerol oils, natural and / or synthetic fatty esters, e.g. sorbitol, a natural and/or synthetic glycerol monoester, and/or a natural and/or synthetic glycerol diester, lecithin and/or modified lecithin, castor oil, ethoxylated castor oil, modified lanolin.
  • This allows obtaining a polymeric fat able to soften the skin and obtaining leather which is pleasant during the touch, in a more effective way in respect with the polymeric fatliquor of the previous patent.
  • the glycol polymer may be combined in a molar ratio 1 : 0.7-1.3, preferably 1 :1 (so as to obtain advantageously a polymeric fat with less unreacted monomers which would not fix to the leather, and then a more effective product and less polluting for the waste water), with a previously prepared combination of fatty alcohols C6-C28 alkyl or C6-C28 alkenyl and with maleic anhydride in a molar ratio 1 : 0.7-1.3, preferably 1 :1.
  • introducing also the products up to C28 allows obtaining polymeric fatliquors with a higher full and waxy effect, in particular on the leather surface.
  • the polymeric fat may comprise a fatty carboxylic acid and/or fatty lanolin acid, previously treated with a polyglicol polymer having the general formula HO(CH2CH20)n and/or HO(C3H60)mH with n and m ranging from 3 to 300.
  • the polymeric fat may comprise:
  • the glycol polymer may be one of the following:
  • Polyethyleneglycol (PEG) having the general formula HO(C2H40)nH with n ranging from 3 to 300, preferably from 4 to 10
  • PPG polypropylene glycol
  • RN(C2H40)mH(C2H40)nH with R C6-C28 alkyl or C6-C28 alkenyl, preferably C10-C20, and m ranging from 2 to 300 and n ranging from 2 to
  • m ranging from 2 to 10 and n ranging from 2 to 10, or a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R' C6-C28 alkyl or C6-C28 alkenyl, preferably C10-C20, and m ranging from 2 to 300, preferably ranging from 2 to 10.
  • the method for obtaining a polymeric fatliquor according to the invention comprises the following steps: Providing a glycol polymer
  • the following step may be provided:
  • stripping shall be understood the step of setting the compound at a temperature of 160°-350°C for from 2 to 10 hours in possible presence of an acid catalyst as paratoluenesulfonic acid, sulphuric acid, ecc, and at a pressure ranging from -0.1 to -0.997 Bar, in respect with the unitary atmospheric pressure, for a period ranging from 20 minutes to 6 hours, preferably from 20 minutes to 4 hours.
  • an acid catalyst as paratoluenesulfonic acid, sulphuric acid, ecc
  • the step of setting the compound at a pressure ranging from -0.1 to -0.997 Bar in respect with the unitary atmospheric pressure may occur up to obtaining less than 5 mg/KOH acidity.
  • the following step may be provided:
  • the following step may be provided:
  • the compound may be treated alternatively with sulphur dioxide in a molar ratio 1 : 0,7-1 ,3 preferably 1 :1 , at a temperature of from 50 to 100°C, preferably from 80 to 95°C, for from
  • Triethanolamine Monoethanolamine so as to obtain a emulsion or a dispersion of the polymeric fatliquor having from 20% to 90% of active substance, preferably from 30 to 70%.
  • the method for obtaining a polymeric fat according to the invention comprises also the following steps:
  • This decrease in pressure allows advantageously obtaining a purer and more effective product, in particular for skins for automotive upholstery: in such a way values of gravimetric fogging close to zero may be obtained.
  • the compound may be treated alternatively with sulphur dioxide in a molar ratio 1 : 0.7-2.5, at a temperature of from 50 to 100°C, preferably from 80 to 95°C, for from 1 to 4 hours, preferably from 1 to 2 hours.
  • the compound may be treated alternatively with P205 and/or phosphoric acid in a molar ratio 1 : 0.3-3, at a temperature ranging from 50 to 100°C, for from 1 to 6 hours,
  • the compound may be treated alternatively. with sulphuric acid or sulphuric anhydride in a molar ratio 1 : 0.3-2.0, at a temperature ranging from 10 to 60°C, for from 1 to 4 hours,
  • Triethanolamine Monoethanolamine up to a PH between 4 and 9.
  • a possible wash follows, with a slightly alkaline water solution of sodium chloride or sodium sulphate at a concentration ranging from 1% to 30%, separating the wash water and then neutralizing with a water solution of the following alkalis: ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine, Triethanolamine, Monoethanolamine up to a PH between 4 and 9.
  • polymeric fatliquors subject matter of the invention may be obtained by one of the following procedures:
  • PG may be PEG ,PPG, PEG/PPG, fatty ethoxylated alcohol, ethoxylated fatty acid, ethoxylated castor oil, ethoxylated primary and secondary amines;
  • AM corresponds to maleic anhydride
  • R may be: fatty alcohol, fatty ethoxylated alcohol, ethoxylated fatty acid, glycerol monoester, glycerol diester, sorbitol ester, castor oil, ethoxylated castor oil, modified lanolin, lecithin, modified lecithin, ethoxylated primary and secondary amines;
  • PG corresponds to PEG and/or PPG and/or PEG/PPG
  • AM corresponds to maleic anhydride
  • R may be: fatty alcohol, fatty ethoxylated alcohol, ethoxylated fatty acid, glycerol monoester, glycerol diester, sorbitol ester, castor oil, ethoxylated castor oil, modified lanolin, lecithin, modified lecithin, ethoxylated primary and secondary amines;
  • These new substances may be used as fatliquoring agents alone or as raw material for formulating fatliquoring agents for leather, skins, furs, fabrics or other fibrous materials.
  • the leathers treated with these polymeric fatty are soft, smooth, with a fine grain and compact.
  • the fatliquoring treatments based on these polymeric fatliquors have a high factor of exhaustion and a high fattening power and this leads to allow us using a smaller quantity compared to existing agents fatliquoring with equal quality result on the leather, thus obtaining a lower COD of exhaust -20/30% in the exhausted baths.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Cosmetics (AREA)
  • Polyethers (AREA)

Abstract

The present invention relates to the synthesis of a polymeric fatliquor based on a glycol polymer + maleic anhydride previously reacted with at least one amongst a sorbitol ester, a natural or synthetic glycerol monoester, a natural or synthetic glycerol diester, castor oil, ethoxylated castor oil, a modified lanolin fatty acid, lecithin, modified lecithin + sulfitation or phosphating or sulphation. The invention relates furthermore to a method for obtaining such polymeric fatliquor.

Description

Fatliquors polymer for increasing softness of skin during the tanning
The present invention relates to the synthesis of polymeric fatliquors for increasing softness of skin during the tanning.
5 The patent application n. WO2015107148, always on behalf of the applicant, relates to the synthesis of polymeric fatliquors based on natural and/or synthetic raw material from renewable sources suitable for being used in fat liquoring products for leather, which are highly efficient and which requires the use of a low quantity per kg of skin in respect with the o products which were known up to then.
Furthermore, such polymeric fatliquors allow obtaining an emulsion or a solution which remains stable during its transportation or its storage period, and that is strongly fixed to the leather, which does not allow being extracted, so that it is possible to wash the treated leather even in the5 washing machine.
Nevertheless, such fatliquors do not allow reaching a certain level of soft feeling in the treated skin.
Furthermore, in case the treated skin is used for realizing finishing equipment for cars, they cause releasing volatile substances by the skin o itself, which settle on the glass of the cab; such phenomenon is referred to as fogging.
Moreover, in case of skin used for realizing garments or parts of garments, such polymeric fatliquors are not able to conferring to these skins the ideal lightness and softness so they can be worn .
5 Thus main aim of the present invention is to obtain polymeric fatliquors able to confer a higher level of soft feeling in the treated skin in respect with the known polymeric fatliquors.
In particular, object of the invention is obtaining polymeric fatliquors able to confer to the treated skin a waxy feeling.
Another object of the invention is reduce the fogging of skin used for realizing finishing equipment for cars, so that the gravimetric fogging test results are next to zero.
Furthermore an object of the invention is obtaining polymeric fatliquors able to confer to the skin the required lightness and comfort in order to be worn.
These and other objects are achieved by a polymeric fatliquor according to the attached claim 1. Detail features of the substance according to the invention are shown in the dependent claims, which are referred to here in full.
Advantageously, the subject of the invention is a polymeric fat based on a combination of a glycol polymer + maleic anhydride which was previously reacted with at least one among a fatty alcohol, an ethoxylated fatty alcohol, an ethoxylated fatty acid, a fatty ethoxylated amine and at least one amongst a sorbitol ester, a natural or synthetic glycerol monoester, a natural or synthetic glycerol diester, castor oil, ethoxylated castor oil, a modified lanolin fatty acid, lecithin, modified lecithin + sulfitation or phosphating or sulphation.
Introducing the reactions of phosphating or sulphation, coupled with the use of fatty substances C6-C28 alkyl or alkenyl, leads to obtain products able to give pastiness, softness, waxy feeling and fullness to the skin without weighing it down, i.e. with no increase, but with a decrease, in the specific weight in respect with a treated skin with a traditional sulfitated fatliquor.
Mostly the use of higher carboxilic substances, as those derived from lanolin, coupled with the application of phosphating allowed obtaining polymeric fatliquors with a filling other than lubricating effect allowing a cut in the quantities of retanners, about -30%, used in the skin processing and being more resistant to tear, a quality mainly very popular on leather which are used in items requiring important stitches, undergoing multiple mechanical actions such as seams for clothing and automotive upholstery. From the application of the polymeric fat which was obtained after sulphation a soft waxy skin is obtained, but at the same time it is round (term that in the tanning industry refers to a skin having a particular rubbery, i.e. it is not limp) suitable for footwear items requiring softness for the comfort and at the same time the roundness conferring to the footwear the property to maintain the shape even after the bends due to the walk. Adding sorbitol esters, glycerol monoesters, glycerol diesters, castor oil, ethoxylated castor oil, modified lanolin, lecithin and modified lecithin was made because it was observed that these polymers in respect with those listed in the abovementioned previous patent allow conferring higher softness, superficial likeliness for touch properties to the so produced skins, and higher lubricating properties in leathers.
According to the invention, advantageously, the polymeric fat may comprise fatty acids, natural and / or synthetic or ethoxylated glycerol oils, natural and / or synthetic fatty esters, e.g. sorbitol, a natural and/or synthetic glycerol monoester, and/or a natural and/or synthetic glycerol diester, lecithin and/or modified lecithin, castor oil, ethoxylated castor oil, modified lanolin. This allows obtaining a polymeric fat able to soften the skin and obtaining leather which is pleasant during the touch, in a more effective way in respect with the polymeric fatliquor of the previous patent. In particular, according to the invention, the glycol polymer may be combined in a molar ratio 1 : 0.7-1.3, preferably 1 :1 (so as to obtain advantageously a polymeric fat with less unreacted monomers which would not fix to the leather, and then a more effective product and less polluting for the waste water), with a previously prepared combination of fatty alcohols C6-C28 alkyl or C6-C28 alkenyl and with maleic anhydride in a molar ratio 1 : 0.7-1.3, preferably 1 :1.
In such a way, advantageously, polymeric fatliquors with higher full and waxy effect, in particular on the leather surface, are obtained.
Advantageously, the polymeric fat of the invention may comprise an ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300.
Advantageously, introducing also the products up to C28 allows obtaining polymeric fatliquors with a higher full and waxy effect, in particular on the leather surface.
Always according to the invention, the polymeric fat may comprise a fatty carboxylic acid and/or fatty lanolin acid, previously treated with a polyglicol polymer having the general formula HO(CH2CH20)n and/or HO(C3H60)mH with n and m ranging from 3 to 300. According to the invention, the polymeric fat may comprise:
- a fatty ethoxylated amine having the general formula RN(C2H40)mH(C2H40)nH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300,
- or a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R" = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300.
In such cases, advantageously, according to the invention, the glycol polymer may be one of the following:
Polyethyleneglycol (PEG) having the general formula HO(C2H40)nH with n ranging from 3 to 300, preferably from 4 to 10
or polypropylene glycol (PPG) having the general formula HO(C3H60)mH with m ranging from 3 to 300, preferably ranging from 4 to 10,
or a copolymer of PEG/PPG having the general formula
HO(C3H60)m(CH2CH20)nH with m ranging from 2 to 300 and n ranging from 2 to 300, preferably m ranging from 2 to 8 and n ranging from 2 to 8, or fatty alcohols C6-C28 alkyl or C6-C28 alkenyl,
or an ethoxylated castor oil,
or an ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, preferably C10-C20, and m ranging from 2 to 300, preferably ranging from 2 to 8,
or a fatty ethoxylated carboxylic acid having the general formula
RC02(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, preferably
C10-C20 and m ranging from 2 to 300, preferably ranging from 2 to 8 or a fatty ethoxylated amine having the general formula
RN(C2H40)mH(C2H40)nH with R = C6-C28 alkyl or C6-C28 alkenyl, preferably C10-C20, and m ranging from 2 to 300 and n ranging from 2 to
300, preferably m ranging from 2 to 10 and n ranging from 2 to 10, or a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, preferably C10-C20, and m ranging from 2 to 300, preferably ranging from 2 to 10.
The method for obtaining a polymeric fatliquor according to the invention comprises the following steps: Providing a glycol polymer
Combining the glycol polymer in a molar ratio 1 : 0.7-1 ,3 with a fatty carboxylic acid or with a previously prepared combination of fatty alcohols C6-C28 alkyl or C6-C28 alkenyl, preferably C10-C18, or with natural based glycerides and/or an ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated carboxylic acid having the general formula RC02(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RN(C2H40)mH(C2H40)nH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a sorbitol ester and/or a natural based (fish, animals, vegetal) and/or synthetic glycerol monoester, and/or natural and/or synthetic esters, or synthetic and/or a natural and/or synthetic glycerol diester and/or modified lanolin and/or lecithin and/or modified lecithin and/or castor oil and/or ethoxylated castor oil, with maleic anhydride in a molar ratio 1 : 0.7-1.3 at a temperature of 50 - 150 °C, for from 1 to 5 hours, characterized in providing the step of combining the glycol polymer with a fatty acid or with natural based or synthetic glycerides and/or natural and/or synthetic esters, and/or a combination at a temperature of 160°C - 350°C, preferably from 180 to 230, for from 2 to 10 hours, preferably 4 - 6 hours.
In particular, according to the invention, during the step of combining the glycol polymer with a fatty acid or with natural based or synthetic glycerides and/or natural and/or synthetic esters at a temperature of 160°C - 350°C, the following step may be provided:
setting the compound at a temperature of 160°-350°C for from 2 to 10 hours in possible presence of an acid catalyst as paratoluenesulfonic acid, sulphuric acid, etc., and at a pressure ranging from -0.1 to -0.997 Bar, in respect with the unitary atmospheric pressure, for a period ranging from 20 minutes to 6 hours, preferably from 20 minutes to 4 hours. This decrease in pressure advantageously allows obtaining a purer and more effective product thanks to the stripping of low-boiling substances, impurities, etc., in particular for skins for automotive upholstery: in such a way values of gravimetric fogging close to zero may be obtained.
For "stripping" shall be understood the step of setting the compound at a temperature of 160°-350°C for from 2 to 10 hours in possible presence of an acid catalyst as paratoluenesulfonic acid, sulphuric acid, ecc, and at a pressure ranging from -0.1 to -0.997 Bar, in respect with the unitary atmospheric pressure, for a period ranging from 20 minutes to 6 hours, preferably from 20 minutes to 4 hours.
For "low-boiling" shall be understood those substances which evaporate at the temperature and pressure that we set.
Still according to the invention, the step of setting the compound at a pressure ranging from -0.1 to -0.997 Bar in respect with the unitary atmospheric pressure may occur up to obtaining less than 5 mg/KOH acidity.
Always according to the invention, after the step of setting the compound at a pressure ranging from -0.1 to -0.997 Bar, the following step may be provided:
combining the compound with maleic anhydride in a molar ratio 1 : 0.7-1.3, preferably 1 :1 , at the temperature of 50 - 150 °C, preferably from 70 to 90°C, for from 1 to 5 hours, preferably from 1 to 3 hours.
Furthermore, according to the invention, after the step of combining the compound with maleic anhydride in a molar ratio 1 : 0.7-1.3, and/or after the step of setting the compound at a pressure ranging from -0.1 to -0.997 Bar, the following step may be provided:
- treating the compound with a water solution containing from 20 to 80% sodium metabisulfite or sodium sulfite or sodium bisulfite or ammonium bisulfite in a molar ratio 1 : 0.7-1.3 preferably 1 :1 , at a temperature of from 50 to 100°C, preferably from 80 to 95°C, for from 1 to 4 hours, preferably from 1 to 2 hours, so as to obtain a emulsion or a dispersion of the polymeric fatliquor having from 20% to 90% of active substance, preferably from 30 to 70%.
Furthermore, according to the invention, the compound may be treated alternatively with sulphur dioxide in a molar ratio 1 : 0,7-1 ,3 preferably 1 :1 , at a temperature of from 50 to 100°C, preferably from 80 to 95°C, for from
1 to 4 hours, preferably from 1 to 2 hours.
After such step, it is possible providing the step of:
- neutralizing with a water solution of at least one of the following alkalis: ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine,
Triethanolamine, Monoethanolamine so as to obtain a emulsion or a dispersion of the polymeric fatliquor having from 20% to 90% of active substance, preferably from 30 to 70%.
The method for obtaining a polymeric fat according to the invention comprises also the following steps:
Providing a glycol polymer PEG and/or PPG and/or PEG/PPG - Combining the glycol polymer in a molar ratio 1 : 0.7-2,5 with a previously prepared combination of fatty alcohols C6-C28 alkyl or C6-C28 alkenyl, and/or an ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated carboxylic acid having the general formula RC02(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RN(C2H40)mH(C2H40)nH with R = C6-C28 alkyl or C6- C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300 and/or sorbitol ester and/or a natural and/or synthetic glycerol monoester and/or a natural and/or synthetic glycerol diester and/or modified lanolin and/or lecithin and/or modified lecithin and/or castor oil and/or ethoxylated castor oil, with maleic anhydride in a molar ratio 1 : 0.7-1.3, characterized in providing the combination at a temperature of 50 - 150 °C, for from 1 to 5 hours;
setting the compound at a temperature of 160°-350°C for from 2 to 10 hours in possible presence of an acid catalyst as paratoluenesulfonic acid, sulphuric acid, ecc, and at a pressure ranging from -0.1 to -0.997 Bar, in respect with the unitary atmospheric pressure, for a period ranging from 20 minutes to 6 hours, preferably from 1 to 4 hours.
This decrease in pressure allows advantageously obtaining a purer and more effective product, in particular for skins for automotive upholstery: in such a way values of gravimetric fogging close to zero may be obtained.
- treating the compound with a water solution containing from 20 to 80% sodium metabisulfite or sodium sulfite or sodium bisulfite or ammonium bisulfite in a molar ratio 1 : 0.7-2.5, at a temperature of from 50 to 100°C, preferably from 80 to 95°C, for from 1 to 4 hours, preferably from 1 to 2 hours, so as to obtain an emulsion or a dispersion of the polymeric fatliquor having from 20% to 90% of active substance, preferably from 30 to 70%.
Furthermore, according to the invention, the compound may be treated alternatively with sulphur dioxide in a molar ratio 1 : 0.7-2.5, at a temperature of from 50 to 100°C, preferably from 80 to 95°C, for from 1 to 4 hours, preferably from 1 to 2 hours.
After such step, it is possible providing the step of:
-neutralizing with a water solution of at least one of the following alkalis: ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine, Triethanolamine, Monoethanolamine so as to obtain an emulsion or a dispersion of the polymeric fatliquor having from 20% to 90% of active substance, preferably from 30 to 70%;
furthermore, according to the invention, the compound may be treated alternatively with P205 and/or phosphoric acid in a molar ratio 1 : 0.3-3, at a temperature ranging from 50 to 100°C, for from 1 to 6 hours,
- neutralizing in a water solution with one of the following alkalis: ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine, Triethanolamine, Monoethanolamine up to a PH between 4 and 9;
furthermore, according to the invention, the compound may be treated alternatively. with sulphuric acid or sulphuric anhydride in a molar ratio 1 : 0.3-2.0, at a temperature ranging from 10 to 60°C, for from 1 to 4 hours,
- possible wash with a slightly alkaline solution of sodium chloride or sodium sulphate at a concentration ranging from 1% to 30%,
-possible separating by decantation the wash.
- neutralizing with a water solution of one of the following alkalis: ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine,
Triethanolamine, Monoethanolamine up to a PH between 4 and 9.
We briefly describe the techniques developed and used for our experiments:
Phosphating
After the combination of a glycol polymer PEG and/or PPG and/or PEG/PPG in molar ratio 1 :0,7-2,5 with a previously prepared combination of a natural or synthetic glycerol monoester, a natural or synthetic glycerol diester, a sorbitol ester, a modified fatty lanolin acid, fatty alcohols C6-C28 alkyl or C6-C28 alkenyl, and/or an ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated carboxylic acid having the general formula RC02(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RN(C2H40)mH(C2H40)nH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, with maleic anhydride in molar ratio 1 :0,7-1 ,3, preferably 1 :1 , at a temperature of 50 - 150 °C, preferably from 70 to 90°C, for from 1 to 5 hours, preferably from 1 to 3 hours, at a temperature of 160°C - 350°C, preferably from 180 to 230°C, for from 2 to 10 hours, preferably 4 - 6 hours, then it is put at a pressure ranging from - 0.1 to -0.997 Bar, for from 20 minutes to 4 hours, preferably from 1 to 2 hours,
-treating the compound with P205 and/or phosphoric acid in a molar ratio 1 :0.3-3 at a temperature ranging from 50 to 100°C, for from 1 to 6 hours, -neutralizing in a water solution with one of the following alkalis: ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine, Triethanolamine, Monoethanolamine up to a PH between 4 and 9. Sulphation
After the combination of a glycol polymer PEG and/or PPG and/or PEG/PPG in molar ratio 1 :0,7-2,5 with a previously prepared combination of a natural or synthetic glycerol monoester, a natural or synthetic glycerol diester, a sorbitol ester, a modified fatty lanolin acid, fatty alcohols C6-C28 alkyl or C6-C28 alkenyl, and/or an ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated carboxylic acid having the general formula RC02(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RN(C2H40)mH(C2H40)nH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, with maleic anhydride in molar ratio 1 :0,7-1 ,3, preferably 1 :1 , at a temperature of 50 - 150 °C, preferably from 70 to 90°C, for from 1 to 5 hours, preferably from 1 to 3 hours, at a temperature of 160°C - 350°C, preferably from 180 to 230°C, for from 2 to 10 hours, preferably 4 - 6 hours, then it is put at a pressure ranging from - 0.1 to -0.997 Bar, for from 20 minutes to 4 hours, preferably from 1 to 2 hours,
- treating the compound with sulphuric acid or sulphuric anhydride in molar ratio 1 :0.3-2.0 added for 1-4h at a temperature of 10°C-60°C.
A possible wash follows, with a slightly alkaline water solution of sodium chloride or sodium sulphate at a concentration ranging from 1% to 30%, separating the wash water and then neutralizing with a water solution of the following alkalis: ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine, Triethanolamine, Monoethanolamine up to a PH between 4 and 9.
The polymeric fatliquors subject matter of the invention may be obtained by one of the following procedures:
a) Polymers based on polyethylene glycol (PEG) and/or polypropylene glycol (PPG) + Fatty acids + a sorbitol ester + maleic anhydride + sulfitation or phosphating or sulphation.
b) Polymers based on PEG and/or PPG + natural and / or synthetic glycerid oils and/or natural and / or synthetic fatty esters + a sorbitol ester + maleic anhydride + sulfitation or phosphating or sulphation. c) Polymers based on the following structure:
PG-AM-R
where PG may be PEG ,PPG, PEG/PPG, fatty ethoxylated alcohol, ethoxylated fatty acid, ethoxylated castor oil, ethoxylated primary and secondary amines;
where AM corresponds to maleic anhydride;
where R may be: fatty alcohol, fatty ethoxylated alcohol, ethoxylated fatty acid, glycerol monoester, glycerol diester, sorbitol ester, castor oil, ethoxylated castor oil, modified lanolin, lecithin, modified lecithin, ethoxylated primary and secondary amines;
followed by sulfitation or phosphating or sulphation.
d) Polymers based on the following structure:
R-AM-PG-AM-R
where PG corresponds to PEG and/or PPG and/or PEG/PPG;
where AM corresponds to maleic anhydride;
where R may be: fatty alcohol, fatty ethoxylated alcohol, ethoxylated fatty acid, glycerol monoester, glycerol diester, sorbitol ester, castor oil, ethoxylated castor oil, modified lanolin, lecithin, modified lecithin, ethoxylated primary and secondary amines;
followed by sulfitation or phosphating or sulphation.
These new substances may be used as fatliquoring agents alone or as raw material for formulating fatliquoring agents for leather, skins, furs, fabrics or other fibrous materials.
The leathers treated with these polymeric fatty are soft, smooth, with a fine grain and compact.
Advantageously, the Advantageously, the fatliquoring treatments based on these polymeric fatliquors have a high factor of exhaustion and a high fattening power and this leads to allow us using a smaller quantity compared to existing agents fatliquoring with equal quality result on the leather, thus obtaining a lower COD of exhaust -20/30% in the exhausted baths.
The invention as conceived is susceptible to numerous modifications and variations, all falling within the protective scope of the appended claims. Moreover, all the details may be replaced with other technically equivalent elements.
In practice, the materials employed, as well as the doses and the values, may be varied depending on the contingent requirements and the state of the art.

Claims

1) Polymeric fatliquor based on a combination of a glycol polymer + maleic anhydride previously reacted with at least one amongst a fatty alcohol, an ethoxylated fatty alcohol, an ethoxylated fatty acid, a fatty ethoxylated amine and at least one amongst a sorbitol ester, a natural or synthetic glycerol monoester, a natural or synthetic glycerol diester, a modified lanolin fatty acid, lecithin, modified lecithin + sulfitation or sulphation or phosphating.
2) Polymeric fatliquor according to the claim 1 , characterized in that the glycol polymer is combined in a molar ratio 1 : 0.7-1.3, preferably 1 :1 , with a previously prepared combination of fatty alcohols C6-C28 alkyl or C6-C28 alkenyl, and with maleic anhydride in a molar ratio 1 : 0.7-1.3.
3) Polymeric fatliquor according to the claim 1 , characterized in comprising ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300.
4) Polymeric fatliquor according to the claim 1 , characterized in comprising a fatty carboxylic acid and/or a fatty lanolin acid and/or lecithin and/or acetylated lecithin previously treated with a polyglicol polymer having the general formula HO(CH2CH20)n and/or HO(C3H60)mH with n and m ranging from 3 to 300.
5) Polymeric fatliquor according to the claim 1 , characterized in comprising a fatty ethoxylated amine having the general formula RN(C2H40)mH(C2H40)nH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300.
6) Polymeric fatliquor according to the claim 1 , characterized in comprising a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300.
7) Polymeric fatliquor according to one of the claims 1-6, characterized in that the glycol polymer is one of the following:
PEG having the general formula HO(C2H40)nH with n ranging from 3 to 300, or PPG having the general formula HO(C3H60)mH with m ranging from 3 to 300,
or a copolymer of PEG/PPG having the general formula HO(C3H60)m(CH2CH20)nH with m ranging from 2 to 300 and n ranging from 2 to 300,
or an ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, or a fatty ethoxylated carboxylic acid having the general formula RC02(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300,
or a fatty ethoxylated amine having the general formula RN(CH2CH20)mH(CH2CH20)nH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300, or a fatty ethoxylated amine having the general formula RR'N(CH2CH20)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300.
8) Method for obtaining a polymeric fatliquor according to one of the claims 1-7, comprising the following steps:
- Providing a glycol polymer
- Combining the glycol polymer in a molar ratio 1 : 0.7-2,5 with a previously prepared combination of fatty alcohols C6-C28 alkyl or C6-C28 alkenyl, and/or an ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated carboxylic acid having the general formula RC02(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RN(C2H40)mH(C2H40)nH with R = C6-C28 alkyl or C6- C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, with maleic anhydride in a molar ratio 1 : 0.7-1.3, characterized in providing the combination at a temperature of 50 - 150 °C, for from 1 to 5 hours. 9) Method for obtaining a polymeric fatliquor according to the claim 8, characterized in that the combination of the glycol polymer occurs in a molar ratio 1 : 1 :0,7-2,5 at a temperature of 160° - 350 °C, for from 2 to 10 hours in presence of an acid catalyst.
10) Method for obtaining a polymeric fatliquor according to the claim 8 or 9, characterized in providing the following step:
- setting the compound at a pressure ranging from -0.1 to -0.997 Bar in respect with the unitary atmospheric pressure, for from 20 minutes to 4 hours.
11) Method for obtaining a polymeric fatliquor according to the claim 10, characterized in that the step of setting the compound at a pressure ranging from -0.1 to -0.997 Bar in respect with the unitary atmospheric pressure occurs up to obtaining less than 5 mg/KOH acidity.
12) Method for obtaining a polymeric fatliquor according to the claim 10, characterized in providing, after the step of setting the compound at a pressure ranging from -0.1 to -0.997 in respect with the unitary atmospheric pressure, the following step:
- Treating the compound with a water solution containing from 20 to 80% sodium metabisulfite or sodium sulfite or sodium bisulfite or ammonium bisulfite in a molar ratio 1 : 0.7-2, at a temperature of 50 to 100°C, for from 1 to 4 hours, so as to obtain a water solution or dispersion or emulsion of the polymeric fatliquor, having from 20 % to 90% of active substance.
13) Method for obtaining a polymeric fatliquor according to the claim 10, characterized in providing, after the step of setting the compound at a pressure ranging from -0.1 to -0.997 in respect with the unitary atmospheric pressure, the following steps:
- Treating the compound with sulphur dioxide gas in a molar ratio 1 : 0,7-2, at a temperature of from 50 to 100°C, preferably from 80 to 95°C, for from 1 to 4 hours, preferably from 1 to 2 hours
- neutralizing with alkalis as ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine, Triethanolamine, Monoethanolamine, so as to obtain a water solution or dispersion or emulsion of the polymeric fatliquor having from 20% to 90% of active substance, preferably from 30 to 70%. 14) Method for obtaining a polymeric fatliquor according to the claim 10 or 11 , characterized in providing, after the step of setting the compound at a pressure ranging from -0.1 to -0.997 Bar in respect with the unitary atmospheric pressure, the following steps in the order:
- Treating the compound with P205 and/or phosphoric acid in a molar ratio 1 : 0.3-1 , at a temperature ranging from 50 to 100°C, for from 1 to 6 hours,
- neutralizing in a water solution with one of the following alkalis: ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine, Triethanolamine, Monoethanolamine up to a PH between 4 and 9.
15) Method for obtaining a polymeric fatliquor according to the claim 10 or 11 , characterized in providing, after the step of setting the compound at a pressure ranging from -0.1 to -0.997 Bar in respect with the unitary atmospheric pressure, the following steps in the order:
- Treating the compound with sulphuric acid or sulphuric anhydride in a molar ratio 1 : 0.3-0.7, at a temperature ranging from 10 to 60°C, for from 1 to 4 hours,
- wash with a slightly alkaline solution of sodium chloride or sodium sulphate at a concentration ranging from 1% to 30%,
-separating by decantation the wash.
16) Method for obtaining a polymeric fatliquor according to the claim 15, characterized in providing, after the step of treating the compound with sulphuric acid or sulphuric anhydride in a molar ratio 1 : 0.3-0.7, at a temperature ranging from 10 to 60°C, for from 1 to 4 hours, the steps of:
- neutralizing in a water solution with one of the following alkalis: ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine, Triethanolamine, Monoethanolamine up to a PH between 4 and 9.
17) Polymeric fatliquor based on a combination of a glycol polymer + maleic anhydride previously reacted with at least one amongst a sorbitol ester, a natural or synthetic glycerol monoester, a natural or synthetic glycerol diester, castor oil, ethoxylated castor oil, modified lanolin, lecithin, modified lecithin + sulfitation or sulphation or phosphating. 18) Polymeric fatliquor according to the claim 17, characterized in that the glycol polymer is combined in a molar ratio 1 : 0.7-1.3, preferably 1 :1 , with a previously prepared combination of fatty alcohols C6-C28 alkyl or C6-C28 alkenyl, and with maleic anhydride in a molar ratio 1 : 0.7-1.3.
19) Polymeric fatliquor according to one of the claims 17-18, characterized in comprising ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300.
20) Polymeric fatliquor according to one of the claims 17-19 characterized in comprising a fatty carboxylic acid and/or a fatty lanolin acid previously treated with a polyglicol polymer having the general formula HO(CH2CH20)n and/or HO(C3H60)mH with n and m ranging from 3 to 300.
21) Polymeric fatliquor according to one of the claims 17-20, characterized in comprising a fatty ethoxylated amine having the general formula RN(C2H40)mH(C2H40)nH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300.
22) Polymeric fatliquor according to one of the claims 17-21 , characterized in comprising a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300.
23) Polymeric fatliquor according to one of the claims 17-22, characterized in that the glycol polymer is one of the following:
PEG having the general formula HO(C2H40)nH with n ranging from 3 to 300,
or PPG having the general formula HO(C3H60)mH with m ranging from 3 to 300,
or a copolymer of PEG/PPG having the general formula HO(C3H60)m(CH2CH20)nH with m ranging from 2 to 300 and n ranging from 2 to 300,
or an ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, or an ethoxylated castor oil, or a fatty ethoxylated carboxylic acid having the general formula RC02(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300,
or a fatty ethoxylated amine having the general formula RN(CH2CH20)mH(CH2CH2O)nH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300, or a fatty ethoxylated amine having the general formula RR'N(CH2CH20)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300.
24) Method for obtaining a polymeric fatliquor according to one of the claims 17-23, comprising the following steps:
- Providing a glycol polymer
- Combining the glycol polymer in a molar ratio 1 : 0.7-1 ,3 with a previously prepared combination of fatty alcohols C6-C28 alkyl or C6-C28 alkenyl, and/or an ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated carboxylic acid having the general formula RC02(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RN(C2H40)mH(C2H40)nH with R = C6-C28 alkyl or C6- C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300 and/or a sorbitol ester and/or a natural or synthetic glycerol monoester and/or a natural and/or synthetic glycerol diester and/or modified lanolin and/or lecithin and/or modified lecithin and/or castor oil and/or ethoxylated castor oil, with maleic anhydride in a molar ratio 1 : 0.7-1.3, characterized in providing the combination at a temperature of 50 - 150 °C, for from 1 to 5 hours.
25) Method for obtaining a polymeric fatliquor according to one of the claims 17-23, comprising the following steps:
- Providing a glycol polymer of PEG and/or of PPG and/or PEG/PPG
- Combining the glycol polymer in a molar ratio 1 : 0.7-2,5 with a previously prepared combination of fatty alcohols C6-C28 alkyl or C6-C28 alkenyl, and/or an ethoxylated fatty alcohol having the general formula R(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated carboxylic acid having the general formula RC02(C2H40)mH with R = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RN(C2H40)mH(C2H40)nH with R = C6-C28 alkyl or C6- C28 alkenyl, and m ranging from 2 to 300 and n ranging from 2 to 300, and/or a fatty ethoxylated amine having the general formula RR'N(C2H40)mH with R and R' = C6-C28 alkyl or C6-C28 alkenyl, and m ranging from 2 to 300 and/or a sorbitol ester and/or a natural or synthetic glycerol monoester and/or a natural and/or synthetic glycerol diester and/or modified lanolin and/or lecithin and/or modified lecithin and/or castor oil and/or ethoxylated castor oil, with maleic anhydride in a molar ratio 1 : 0.7-1.3, characterized in providing the combination at a temperature of 50 - 150 °C, for from 1 to 5 hours.
26) Method for obtaining a polymeric fatliquor according to the claim 24 or 25, characterized in that the combination of the glycol polymer occurs at a temperature of 160° - 350 °C, for from 2 to 10 hours.
27) Method for obtaining a polymeric fatliquor according to one of the claims 24-26, characterized in that the combination of the glycol polymer occurs in presence of an acid catalyst.
28) Method for obtaining a polymeric fatliquor according to the claim 24, 25 or 26, characterized in providing the following step:
- setting the compound at a pressure ranging from -0.1 to -0.997 Bar in respect with the unitary atmospheric pressure, for from 20 minutes to 4 hours.
29) Method for obtaining a polymeric fatliquor according to the claim 28, characterized in that the step of setting the compound at a pressure ranging from -0.1 to -0.997 Bar in respect with the unitary atmospheric pressure occurs up to obtaining less than 5 mg/KOH acidity.
30) Method for obtaining a polymeric fatliquor according to the claim 28, characterized in providing, after the step of setting the compound at a pressure ranging from -0.1 to -0.997 in respect with the unitary atmospheric pressure, the following step:
- Treating the compound with a water solution containing from 20 to 80% sodium metabisulfite or sodium sulfite or sodium bisulfite or ammonium bisulfite in a molar ratio 1 : 0.7-2.5 at a temperature of 50 to 100°C, for from 1 to 4 hours, so as to obtain a water solution or dispersion or emulsion of the polymeric fatliquor, having from 20 % to 90% of active substance.
31) Method for obtaining a polymeric fatliquor according to the claim 28, characterized in providing, after the step of setting the compound at a pressure ranging from -0.1 to -0.997 in respect with the unitary atmospheric pressure, the following steps:
- Treating the compound with sulphur dioxide gas in a molar ratio 1 : 0.7- 2.5 at a temperature of from 50 to 00°C, preferably from 80 to 95°C, for from 1 to 4 hours, preferably from 1 to 2 hours
- neutralizing with a water solution of alkalis as ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine, Triethanolamine, Monoethanolamine, so as to obtain a water solution or dispersion or emulsion of polymeric fatliquor having from 20% to 90% of active substance, preferably from 30 to 70%.
32) Method for obtaining a polymeric fatliquor according to the claim 28, characterized in providing, after the step of setting the compound at a pressure ranging from -0.1 to -0.997 Bar in respect with the unitary atmospheric pressure, the following steps in the order:
- Treating the compound with P205 and/or phosphoric acid in a molar ratio 1 : 0.3-3.0 at a temperature ranging from 50 to 100°C, for from 1 to 6 hours,
- neutralizing with a water solution of one of the following alkalis: ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine, Triethanolamine, Monoethanolamine up to a PH between 4 and 9.
33) Method for obtaining a polymeric fatliquor according to the claim 28, characterized in providing, after the step of setting the compound at a pressure ranging from -0.1 to -0.997 Bar in respect with the unitary atmospheric pressure, the following steps in the order:
- Treating the compound with sulphuric acid or sulphuric anhydride in a molar ratio 1 : 0.3-2.0, at a temperature ranging from 10 to 60°C, for from 1 to 4 hours.
34) Method for obtaining a polymeric fatliquor according to the claim 33, characterized in providing, after the step of
- Treating the compound with sulphuric acid or sulphuric anhydride in a molar ratio 1 : 0.3-2.0, at a temperature ranging from 10 to 60°C, for from 1 to 4 hours,
the step of
- wash with a slightly alkaline solution of sodium chloride or sodium sulphate at a concentration ranging from 1% to 30%.
35) Method for obtaining a polymeric fatliquor according to the claim 34, characterized in providing, after the step of
- wash with a slightly alkaline solution of sodium chloride or sodium sulphate at a concentration ranging from 1% to 30%,
the step of
- separating by decantation the wash.
36) Method for obtaining a polymeric fatliquor according to the claim 35, characterized in providing, after the step of
- separating by decantation the wash, the step of
- neutralizing with a water solution of the following alkalis: ammonia, sodium hydroxide, potassium hydroxide, Diethanolamine, Triethanolamine, Monoethanolamine up to a PH between 4 and 9.
EP16834127.9A 2015-11-09 2016-11-09 Fatliquors polymer for increasing softness of skin during the tanning Pending EP3374529A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITUB2015A005367A ITUB20155367A1 (en) 2015-11-09 2015-11-09 POLYMER GREASES FOR THE INCREASE OF THE SKIN SOFTNESS DURING THE TANNING
ITUB2016A000587A ITUB20160587A1 (en) 2015-11-09 2016-02-09 Polymer fatliquors for increasing the softness of leather during tanning
PCT/IT2016/000262 WO2017081710A1 (en) 2015-11-09 2016-11-09 Fatliquors polymer for increasing softness of skin during the tanning

Publications (1)

Publication Number Publication Date
EP3374529A1 true EP3374529A1 (en) 2018-09-19

Family

ID=57963397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16834127.9A Pending EP3374529A1 (en) 2015-11-09 2016-11-09 Fatliquors polymer for increasing softness of skin during the tanning

Country Status (2)

Country Link
EP (1) EP3374529A1 (en)
WO (1) WO2017081710A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022219064A1 (en) 2021-04-15 2022-10-20 Tfl Ledertechnik Gmbh Modified polylactones useful for fatliquoring

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB306672A (en) * 1928-01-23 1929-02-28 Hanseatische Muehlenwerke Ag Improvements in or relating to processes for dressing leather, skins and the like
DE3238180C1 (en) * 1982-10-15 1984-04-19 Schill & Seilacher GmbH & Co, 7030 Böblingen Process for greasing leather and furs
DE3437443A1 (en) * 1984-10-12 1986-04-17 Henkel KGaA, 4000 Düsseldorf METHOD FOR THE PRODUCTION OF LUBRICANT FOR LEATHER AND FUR
BR112016016198A2 (en) * 2014-01-16 2017-08-08 Corichem S R L POLYMERIC SHINE LIQUORS

Also Published As

Publication number Publication date
WO2017081710A4 (en) 2017-08-10
WO2017081710A1 (en) 2017-05-18

Similar Documents

Publication Publication Date Title
US8771374B2 (en) Method for the production of leather, copolymers that are suitable therefor, and further uses thereof
Żarłok et al. Research on application of flax and soya oil for leather fatliquoring
CN110387009A (en) A kind of amphoteric polymer surfactant and fatting agent is removed from office without chromed tanned leather containing the surfactant
EP3094755B1 (en) Polymeric fatliquors
CN102618673B (en) Preparation method of modified rapeseed oil fat-liquoring complex agent
CN101457263A (en) Amphoteric phosphate fat-liquoring agent containing silicon and preparation method thereof
EP3374529A1 (en) Fatliquors polymer for increasing softness of skin during the tanning
CN101603102B (en) Preparation method of composite water-proof leather fat-liquoring agent
Suparno Optimization of chamois leather tanning using rubber seed oil
US7749409B2 (en) Fatliquoring agents for the flame-retardant treatment of leather
JP2015127369A (en) Detergent for textile product
Kassahun Preparation of leather fatliquor cum filler from fleshing waste for retanning process in leather manufacture
PT95552A (en) PROCESS FOR MANUFACTURE OF COIROS FROM ANIMAL SKINS IN WHICH FLUORATED CHEMICALS ARE USED
CN101208439B (en) Method for producing leather
CN106435054B (en) Greasing-retanning agnt of leather and preparation method
ITUB20155367A1 (en) POLYMER GREASES FOR THE INCREASE OF THE SKIN SOFTNESS DURING THE TANNING
CN103237903B (en) Produce the method for leather and be applicable to this aqueous formulation
US2555684A (en) Compositions for treating leather and textiles
Pervez et al. Synthesis of biological based anionic fatliquor and its application on leather
KR20040096602A (en) Low-voc stuffing agents, the use thereof in the production and/or treatment of leather and skins and corresponding production or treatment method
US20060096036A1 (en) Method for hydrophobing leather and furskins
KR101898949B1 (en) Manufacturing method of flexible horse leather
EP1510554A1 (en) Process for preparing polysiloxane compositions and their use for hydrophobing or regreasing of fibrous materials
US8642185B2 (en) Leather production and aqueous formulations suitable therefor
RU2184785C1 (en) Method of manufacturing natural leathers

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20180518

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20210222

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS