CN106478957A - The preparation method of keratin grafting water-based polyurethane polymer leather retanning packing material - Google Patents
The preparation method of keratin grafting water-based polyurethane polymer leather retanning packing material Download PDFInfo
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- CN106478957A CN106478957A CN201610889560.6A CN201610889560A CN106478957A CN 106478957 A CN106478957 A CN 106478957A CN 201610889560 A CN201610889560 A CN 201610889560A CN 106478957 A CN106478957 A CN 106478957A
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- water
- keratin
- hair
- packing material
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
-
- 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
The invention discloses a kind of keratin is grafted the preparation method of water-based polyurethane polymer leather retanning packing material, with aqueous polyurethane acrylate solution as the first component, at a certain temperature, add organic base and form base catalysis system, with ox hair keratin powder as the second component, by the first component and the second component through catalysis graft reaction, then through cooling and organic acid for adjusting pH value, keratin grafting water-based polyurethane polymer leather retanning packing material is prepared.This is used for the retanning filler solution of invention, and with good stability, water dispersible is good.The pH value range for using is wide.When filling for leather retanning, according to wet blue leather weight, 2 3% being added according to mass percent, can penetrate into leather collagen fiber and deposit combination, play filling and retanning effect, plentiful, soft, high resilience is removed from office in retanning filling.
Description
Technical field
The invention belongs to leather chemical industry technical field, more particularly to a kind of keratin grafting water-based polyurethane polymer skin
The preparation method of leather retanning packing material, the aqueous polyurethane grafted keratin leather retanning filler are used for leather processing procedure
Use retanning packing material.
Background technology
Tanning production is the higher light industry of a biomass waste output capacity.There is data to suggest that, often process 1 ton of original
Material skin（Wet salted hide）Only resultant Leather of the output less than 300Kg, remaining is discarded object, wherein discards hair and is up to 100Kg or so.?
In traditional tanning production, pigskin and sheepskin mainly adopt hair saving process, and hair shaft part is completely collected and preserved, has
Certain directly utilizes stuffing.Ox-hide then mainly carries out ruining hair depilation using grey alkaline process, and ox hair is directly degraded to soluble keratin
Albumen or polypeptide, finally with discharge of wastewater, though do not produce solid waste, can cause leather-making waste water COD and BOD numerical value higher
And serious environment pollution.
In recent years, as environmental requirement is increasingly strict, tanning production cleans level and steps up, whether pigskin, sheep
Skin or ox-hide, tannery all adopt hair saving process.From unlike traditional process hides, except producing substantial amounts of pig hair and wool
Solid waste beyond the region of objective existence, leather industry also produce substantial amounts of ox hair solid waste.Pig hair and wool is compared, the utilization of ox hair itself
Value is just very low, along with, in epilation process, hair shaft has suffered a certain degree of breaking-up again, has not had directly profit completely
Value, is pure solid waste for tannery.These discarded objects cannot be processed at all, outer defeated, burn or
Bury all inadvisable.
To sum up, animal hair is the important biomass waste of leather industry, either from the angle of environmental protection, or energy
The angle of source and development of resources, be required for for its find fully, the approach of effectively utilizes and means.
By leather-making waste hair be degraded into through various methods after water-soluble keratin or even polypeptide for leather retanning fill or
Person covers with paint, lacquer, colour wash, etc., and is leather-making waste hair resource utilization method earlier.The method is simple, low cost, but products obtained therefrom is to improving finished product
Leather performance effect is not projected, and has been caused and has been difficult to put it over application in tannery.
Adopting some vinyl monomers in recent years people more, such as acrylic acid, methacrylic acid or（Methyl）Methyl acrylate
Deng based on the thinking of " grafting from (grafting from) ", keratin carries out graft modification, in the hope of improving its application performance.
The method is simple, low cost, also obtain some performances preferably product.Because based on " grafting from（grafting
from）" principle, using conventional free radical polymerization, the control to product structure and molecular size range etc. is very limited,
Properties of product do not show advantage and outstanding feature compared with the retanning packing material of other main flows.In addition, big more options
Vinyl monomer is modified, and product structure and product category are also not enough enriched.
Content of the invention
The invention aims to overcoming the shortcoming and defect that prior art is present, and a kind of keratin is provided and is connect
The preparation method of branch water-based polyurethane polymer leather retanning packing material.The program widens modified monomer（Or compound）Choosing
Scope is selected, jumps out the narrow range of vinyl monomer, and break through " grafting from（grafting from）" modified thinking restriction,
Using the chemical reaction for more enriching and chemical modification means, so as to strengthen the controllability of modifying process, product structure and property is made
More can become more meticulous.
For achieving the above object, the technical scheme is that a kind of keratin grafting water-based polyurethane polymer leather is multiple
The preparation method of tan packing material, it is characterised in that：With aqueous polyurethane acrylate solution as the first component, in uniform temperature
Under, add organic base and base catalysis system is formed, with ox hair keratin powder as the second component, by the first component and the second component
Through graft reaction is catalyzed, then through cooling and organic acid for adjusting pH value, keratin grafting water-based polyurethane polymer leather is prepared multiple
Tan packing material.
It is that the first described component is obtained by following steps to arrange further：At 110-120 DEG C, under polyalcohol vacuum
Eliminating water 1-2 hour, is cooled to 45-50 DEG C, input isocyanate-monomer, and insulated and stirred 10-30min is warming up to 50-70 DEG C,
Stirring 90-180min, hydrophilic group reagent is divided 2-3 input, per minor tick 5-10min, continues stirring 90-180min, once
Property put into end-capping reagent, insulated and stirred 90-180min, be cooled to 35-40 DEG C, add organic base neutralization, pH value 6.0-6.5, plus go
Ionized water dispersed with stirring, through decompression except acetone, outward appearance are colourless transparent solution, pH value is with 10% aqueous solution as 6-7 for room temperature.
It is that the first described component is obtained by following steps to arrange further：At 110-120 DEG C, under polyalcohol vacuum
Eliminating water 1-2 hour, is cooled to 45-50 DEG C, input isocyanate-monomer, and insulated and stirred 20-30min is warming up to 55-65 DEG C,
Stirring 120-150min, hydrophilic group reagent is divided 2-3 input, per minor tick 5-10min, continuation stirring 120-150min, and one
Secondary property puts into end-capping reagent, and insulated and stirred is preferably 120-150min, is cooled to 35-40 DEG C, adds organic base neutralization, pH value
6.0-6.5, plus deionized water dispersed with stirring 30min, through decompression except acetone, to 20%, outward appearance is the regulation solid content that adds water room temperature
Colourless transparent solution, pH value is with 10% aqueous solution as 6-7.
It is that described polyalcohol refers to polyester diol or polyether Glycols, or the mixture of the two to arrange further；Poly-
Ester dihydroxylic alcohols is poly- hexylene glycol adipic acid dihydroxylic alcohols, and polyether Glycols are polyethylene glycol and polypropylene glycol, Relative average molecular weight
Between 400-2000, described hydrophilic reagent is dihydromethyl propionic acid, trimethylolpropane list maleate, and described is different
Cyanate ester monomer is IPDI, toluene di-isocyanate(TDI), methyl diphenylene diisocyanate or hexa-methylene
Diisocyanate, described end-capping reagent are hydroxy-ethyl acrylate, hydroxypropyl acrylate, trimethylolpropane diacrylate.
It is that the second described component is obtained by following steps to arrange further：Leather-making waste ox hair is through degreasing and washing process
Afterwards, put into the deionized water that 2-5 times is added in reaction bulb, be warming up to 60-95 DEG C, put into and account for ox hair mass percent 3-
15% inorganic salts are pre-processed, and mixing time is 30-100min, are put into by several times afterwards and are accounted for ox hair mass percent 10-
40% inorganic base, adjusts pH value to 10-14, and insulated and stirred 3-8h carries out alkaline degradation, is cooled to 45-70 DEG C afterwards, puts into
Account for ox hair mass percent for 10-30% hydrogen peroxide solution, insulated and stirred 30-90min, be warming up to 50-90 DEG C and continue to stir
30-90min is mixed, and room temperature is down to, the light yellow keratin aqueous solution is obtained after stirring 5-30min, obtains the second component.
It is that the second described component is obtained by following steps to arrange further：Leather-making waste ox hair is through degreasing and washing process
Afterwards, put into the deionized water that 2-3 times is added in reaction bulb, be warming up to 75-88 DEG C, put into and account for ox hair mass percent 5-10%'s
Inorganic salts are pre-processed, and mixing time is 60-90min, are put into by several times afterwards and are accounted for the inorganic of ox hair mass percent 10-25%
Alkali, adjusts pH value to 10-12, and insulated and stirred 4-6h carries out alkaline degradation, is cooled to 55-65 DEG C afterwards, puts into and accounts for ox hair quality hundred
Fraction is the hydrogen peroxide solution of 15-25%, after insulated and stirred 45-75min, is warming up to 60-88 DEG C and continues stirring 60-90min, drop
To room temperature, after stirring 15-30min, the light yellow keratin aqueous solution is obtained, obtain second component of the solid content for 25-30%
It is described discarded ox hair to arrange further, from ox-hide leather-making enterprises, loses hair or feathers operation in ox-hide, protect after hair depilation through
Filter, clean, pressing dry rear obtained hair slag；
The described inorganic salts for pretreatment are ammonium persulfate, sodium pyrosulfite, sodium sulfite or sodium hydrogensulfite；
The described inorganic base for adjusting pH value is potassium hydroxide, NaOH, sodium carbonate, calcium hydroxide or magnesia.
Arrange further be formed when the first component and the second component react base catalysis system organic base be monoethanolamine,
Diethanol amine or triethanolamine, two kinds of component graft reaction temperature controls are at 70-95 DEG C, described for adjusting the organic of pH value
Acid is formic acid, acetic acid, propionic acid, lactic acid or citric acid.
It is an advantage of the invention that：
This is used for the retanning filler solution of invention, and with good stability, water dispersible is good.The pH value range for using is wide.
When filling for leather retanning, according to wet blue leather weight, 2-3% is added according to mass percent, can penetrate into leather collagen fiber
And combination is deposited, and filling and retanning effect is played, plentiful, soft, high resilience is removed from office in retanning filling.
The chemical composition that the retanning filler of the present invention is limited the use of without European Union or disabled, production process not three waste discharge, category
In clearer production technology category.
The present invention is described further with reference to specific embodiment.
Specific embodiment
The present invention is specifically described below by embodiment, is served only for the present invention is further described, no
It is understood that for limiting the scope of the present invention, the technician in the field can be according to the content of foregoing invention to the present invention
Make some nonessential modifications and adaptations.
Embodiment 1：
Equipped with agitator, the there-necked flask of condenser pipe, adding 30 grams ox hair is dry, 60g deionized water is added, is warming up to 82
DEG C, putting into 2.4g sodium sulfite and pre-processed, mixing time is 60min.It is 50% to add 6.4g mass percentage concentration in three times
NaOH, adjust pH value to 12-13, insulated and stirred 4-6h, be cooled to 65 DEG C, put into 6g hydrogen peroxide solution, insulated and stirred
After 45min, it is warming up to 75 DEG C and continues stirring 75min.Room temperature, plus 17.5g deionized water is down to, is obtained after stirring 30min light yellow
The keratin aqueous solution.Discharging, stand-by as the first component.
True at 600,110-120 DEG C of 14.7g polypropylene glycol equipped with, in agitator, the there-necked flask of condenser pipe, adding
Empty eliminating water 90min.45 DEG C are cooled to, 17.27gTDI is put into, 15min is stirred, 60 DEG C are warming up to, insulation reaction 120min, will
2.46g dihydromethyl propionic acid is put in three times, stirring reaction 150min.Disposable input 10.10g hydroxy-ethyl acrylate, insulation
Stirring 2h, after being cooled to 40 DEG C, 14.4g triethylamine is neutralized, pH value 6.5-7.0.Add 138.4g deionized water, dispersed with stirring
30min, used as the second component.
Second component adds 8.52g triethanolamine under agitation, adjusts pH value to 8.5-9.0.Second component is put into, is protected
Temperature stirring 30min, is warming up to 70 DEG C, stirs 8h.Less than 35 DEG C are cooled to, 5.2g lactic acid are added, pH value is adjusted to 6.5 or so,
Retanning filler is obtained, outward appearance is the yellow transparent aqueous solution, solid content 30% ± 0.5.
Embodiment 2：
Equipped with agitator, the there-necked flask of condenser pipe, adding 32.5 grams ox hair is dry, 75g deionized water is added, is warming up to
82 DEG C, put into 2.4g sodium pyrosulfite and pre-processed, mixing time is 80min.6.4g mass percentage concentration is added in three times
For 50% NaOH, pH value is adjusted to 12-13, insulated and stirred 4-6h, is cooled to 65 DEG C, put into 7.5g hydrogen peroxide solution,
After insulated and stirred 45min, it is warming up to 75 DEG C and continues stirring 75min.Room temperature is down to, after stirring 30min, obtains light yellow keratin water
Solution.Discharging, stand-by as the first component.
Equipped with agitator, the there-necked flask of condenser pipe, 22.05g PEG400 is added, true at 110-120 DEG C
Empty eliminating water 90min.45 DEG C are cooled to, 18.45gTDI is put into, 15min is stirred, 60 DEG C are warming up to, insulation reaction 120min, will
2.88g dihydromethyl propionic acid is put in three times, stirring reaction 150min.Disposable input 9.95g hydroxy-ethyl acrylate, insulation are stirred
2h is mixed, after being cooled to 40 DEG C, 17.28g triethylamine is neutralized, pH value 6.5-7.0.Add 164.75g deionized water, dispersed with stirring
30min, used as the second component.
Second component adds 9.48g triethanolamine under agitation, adjusts pH value to 8.5-9.0.Second component is put into, is protected
Temperature stirring 30min, is warming up to 70 DEG C, stirs 8h.Less than 35 DEG C are cooled to, 5.76g lactic acid are added, pH value is adjusted to 6.5 or so,
Retanning filler is obtained, outward appearance is the yellow transparent aqueous solution, solid content 30% ± 0.5.
Claims (7)
1. a kind of keratin is grafted the preparation method of water-based polyurethane polymer leather retanning packing material, it is characterised in that：With
Aqueous polyurethane acrylate solution is the first component, at a certain temperature, adds organic base and forms base catalysis system, with ox
Feather keratin powder is the second component, by the first component and the second component through catalysis graft reaction, then adjusts through cooling and organic acid
Section pH value, prepares keratin grafting water-based polyurethane polymer leather retanning packing material.
2. a kind of keratin according to claim 1 is grafted the preparation of water-based polyurethane polymer leather retanning packing material
Method, it is characterised in that the first described component is obtained by following steps：
At 110-120 DEG C, eliminating water 1-2 hour under polyalcohol vacuum, 45-50 DEG C is cooled to, isocyanate-monomer is put into,
Insulated and stirred 10-30min, is warming up to 50-70 DEG C, stirs 90-180min, hydrophilic group reagent is divided 2-3 input, per minor tick
5-10min, continues stirring 90-180min, and disposably input end-capping reagent, insulated and stirred 90-180min, are cooled to 35-40 DEG C,
Organic base is added to neutralize, pH value 6.0-6.5, plus deionized water dispersed with stirring, through decompression except acetone, outward appearance is water white transparency to room temperature
Solution, pH value is with 10% aqueous solution as 6-7.
3. a kind of keratin according to claim 2 is grafted the preparation of water-based polyurethane polymer leather retanning packing material
Method, it is characterised in that the first described component is obtained by following steps：
At 110-120 DEG C, eliminating water 1-2 hour under polyalcohol vacuum, 45-50 DEG C is cooled to, isocyanate-monomer is put into,
Insulated and stirred 20-30min, is warming up to 55-65 DEG C, stirs 120-150min, hydrophilic group reagent is divided 2-3 input, each between
Every 5-10min, continue stirring 120-150min, end-capping reagent is disposably put into, insulated and stirred is preferably 120-150min, is cooled to
35-40 DEG C, add organic base neutralization, pH value 6.0-6.5, plus deionized water dispersed with stirring 30min, room temperature through decompression except acetone,
Regulation solid content add water to 20%, outward appearance is colourless transparent solution, and pH value is with 10% aqueous solution as 6-7.
4. a kind of keratin according to Claims 2 or 3 is grafted water-based polyurethane polymer leather retanning packing material
Preparation method, it is characterised in that：Described polyalcohol refers to polyester diol or polyether Glycols, or the mixture of the two；Poly-
Ester dihydroxylic alcohols is poly- hexylene glycol adipic acid dihydroxylic alcohols, and polyether Glycols are polyethylene glycol and polypropylene glycol, Relative average molecular weight
Between 400-2000, described hydrophilic reagent dihydromethyl propionic acid, trimethylolpropane list maleate, described isocyanide
Acid ester monomer is IPDI, toluene di-isocyanate(TDI), methyl diphenylene diisocyanate or hexa-methylene two
Isocyanates, described end-capping reagent are hydroxy-ethyl acrylate, hydroxypropyl acrylate, trimethylolpropane diacrylate.
5. a kind of keratin according to claim 1 is grafted the preparation of water-based polyurethane polymer leather retanning packing material
Method, it is characterised in that the second described component is obtained by following steps：
Leather-making waste ox hair is put into the deionized water for adding 2-5 times in reaction bulb, is warming up to after degreasing and washing process
60-95 DEG C, input accounts for the inorganic salts of ox hair mass percent 3-15% and is pre-processed, and mixing time is 30-100min,
Putting into the inorganic base for accounting for ox hair mass percent 10-40% afterwards by several times, pH value being adjusted to 10-14, insulated and stirred 3-8h is entered
Row alkaline degradation, is cooled to 45-70 DEG C afterwards, puts into the hydrogen peroxide solution for accounting for ox hair mass percent for 10-30%, and insulation is stirred
30-90min is mixed, is warming up to 50-90 DEG C and continues stirring 30-90min, room temperature is down to, after stirring 5-30min, obtains light yellow angle
Protein solution, obtains the second component.
6. a kind of keratin according to claim 5 is grafted the preparation of water-based polyurethane polymer leather retanning packing material
Method, it is characterised in that the second described component is obtained by following steps：
Leather-making waste ox hair is put into the deionized water for adding 2-3 times in reaction bulb, is warming up to 75- after degreasing and washing process
88 DEG C, input accounts for the inorganic salts of ox hair mass percent 5-10% and is pre-processed, and mixing time is 60-90min, afterwards by several times
The inorganic base for accounting for ox hair mass percent 10-25% being put into, pH value being adjusted to 10-12, insulated and stirred 4-6h carries out alkaline degradation, it
After be cooled to 55-65 DEG C, put into account for ox hair mass percent for 15-25% hydrogen peroxide solution, after insulated and stirred 45-75min,
Be warming up to 60-88 DEG C and continue stirring 60-90min, room temperature is down to, the light yellow keratin aqueous solution is obtained after stirring 15-30min, obtains
Solid content is second component of 25-30%
A kind of system of keratin grafting water-based polyurethane polymer leather retanning packing material according to claim 5 or 6
Preparation Method, it is characterised in that：
Described discarded ox hair, from ox-hide leather-making enterprises, in ox-hide depilation operation, protects after hair loses hair or feathers through filtering, cleaning, press dry
Hair slag obtained afterwards；
The described inorganic salts for pretreatment are ammonium persulfate, sodium pyrosulfite, sodium sulfite or sodium hydrogensulfite；
The described inorganic base for adjusting pH value is potassium hydroxide, NaOH, sodium carbonate, calcium hydroxide or magnesia.
7. a kind of keratin according to claim 1 is grafted the preparation of water-based polyurethane polymer leather retanning packing material
Method, it is characterised in that：First component and the second component form the organic base of base catalysis system when reacting be monoethanolamine, diethyl
Hydramine or triethanolamine, two kinds of component graft reaction temperature controls at 70-95 DEG C described for adjusting the organic acid of pH value are
Formic acid, acetic acid, propionic acid, lactic acid or citric acid.
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| CN201610889560.6A CN106478957A (en) | 2016-10-12 | 2016-10-12 | The preparation method of keratin grafting water-based polyurethane polymer leather retanning packing material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107190349A (en) * | 2017-05-10 | 2017-09-22 | 天津中智科技发展有限公司 | A kind of method that utilization yak hair prepares nanofiber |
| CN107828031A (en) * | 2017-11-03 | 2018-03-23 | 温州大学 | A kind of aqueous polyurethane acrylate grafting keratin hydrogel and preparation method thereof |
| CN108360269A (en) * | 2018-04-20 | 2018-08-03 | 齐鲁工业大学 | A kind of preparation method of ox hair powder filler modified water-soluble dry method polyurethane bass |
| CN116083660A (en) * | 2023-03-15 | 2023-05-09 | 史密特(南京)皮革化学品有限公司 | Light-resistant bio-based polyurethane composite retanning agent and application thereof |
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| CN107190349A (en) * | 2017-05-10 | 2017-09-22 | 天津中智科技发展有限公司 | A kind of method that utilization yak hair prepares nanofiber |
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| CN107828031A (en) * | 2017-11-03 | 2018-03-23 | 温州大学 | A kind of aqueous polyurethane acrylate grafting keratin hydrogel and preparation method thereof |
| CN107828031B (en) * | 2017-11-03 | 2019-12-03 | 温州大学 | A kind of aqueous polyurethane acrylate grafting keratin hydrogel and preparation method thereof |
| CN108360269A (en) * | 2018-04-20 | 2018-08-03 | 齐鲁工业大学 | A kind of preparation method of ox hair powder filler modified water-soluble dry method polyurethane bass |
| CN108360269B (en) * | 2018-04-20 | 2020-05-12 | 齐鲁工业大学 | Preparation method of cow hair powder filler modified aqueous dry-method polyurethane base |
| CN116083660A (en) * | 2023-03-15 | 2023-05-09 | 史密特(南京)皮革化学品有限公司 | Light-resistant bio-based polyurethane composite retanning agent and application thereof |
| CN116083660B (en) * | 2023-03-15 | 2023-11-03 | 史密特(南京)皮革化学品有限公司 | Light-resistant bio-based polyurethane composite retanning agent and application thereof |
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