CN107326123A - A kind of leather retanning agent and preparation method thereof - Google Patents
A kind of leather retanning agent and preparation method thereof Download PDFInfo
- Publication number
- CN107326123A CN107326123A CN201710510212.8A CN201710510212A CN107326123A CN 107326123 A CN107326123 A CN 107326123A CN 201710510212 A CN201710510212 A CN 201710510212A CN 107326123 A CN107326123 A CN 107326123A
- Authority
- CN
- China
- Prior art keywords
- leather
- retanning agent
- parts
- leather retanning
- polyether glycols
- 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.)
- Granted
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
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a kind of leather retanning agent and preparation method thereof, belong to leather processing technique field.A kind of leather retanning agent of the present invention includes the component of following parts by weight：30~40 parts of polyether Glycols side chain acrylic resins, 15~20 parts of modified graphene oxides, 3~5 parts of aluminium citrates, 1~3 part of calgon and 50~60 parts of water.Leather retanning agent of the present invention, combined using specific components, especially polyether Glycols side chain acrylic resin, the Selective filling performance of acrylic resin is improved by introducing the flexible side chain of PTMEG into polyacrylic acid, and then improve the talent for swimming and elasticity of leather, used cooperatively again with aluminium tanningagent, modified graphene oxide etc., it can also make its grain fine and smooth while leather suppleness is improved, and can be improved the shrinkage temperature of leather, suitable for the tanning of a variety of leathers, with good application prospect.
Description
Technical field
The present invention relates to a kind of leather retanning agent and preparation method thereof, belong to leather processing technique field.
Background technology
Leather retanning agent is one of most important chemicals in leather industry production, and conventional has chrome tanning agent, aluminium tanningagent, plant
Tanning agent, aldehyde tanning agent and syntans etc..
Chrome tanning agent is the best tanning agent of current tanning effect, and chrome tanning matter can be by making with the amino on collagenous fibres and carboxyl
With, stronger crosslinking mating reaction is formed, the hydrothermal stability and anti-tensile, tearing toughness of leather is improved, but in chrome tanning
During can produce the pollution problems such as a large amount of chromate waste waters, chromium-bearing sludge, scrap containing chromium for being difficult to administer, three in leather in addition
Valency chromium may be converted under certain condition endangers bigger Cr VI so that the content of 6-valence Cr ions in leather and fur products is made that
Strict regulation；Aluminium tanningagent is low into the flat thin and strong degree of brother；Vegetable tanning agent finished leather color relatively deep, flexibility is poor, in light leather production
It is restricted；Syntans is generally to contain aldehyde tanning agent or acrylic resin retanning agent, the although soft, grain of finished leather containing aldehyde tanning agent
Face is fine and smooth, but leather body it is flat it is thin, be long placed in easy jaundice, and water pollution and environmental pollution can be produced；Acrylic resin retanning agent has
There is good select operator, the thickness and richness of leather can be increased, but because its polymer glass temperature is higher so that
Finished leather leather body is hard, grain is coarse.
Therefore, need badly and develop a kind of leather retanning agent that finished leather leather body softness, grain can be made fine and smooth.
The content of the invention
The technical problems to be solved by the invention：Exist for the leather retanning agent for preparing at present remove from office finished leather body is hard, grain
There is provided a kind of leather retanning agent and preparation method thereof for the coarse defect in face.
In order to solve the above technical problems, the present invention is using technical scheme as described below：
A kind of leather retanning agent, includes the raw material of following parts by weight：
30~40 parts of polyether Glycols side chain acrylic resins, 3~5 parts of aluminium citrates, 1~3 part of calgon and 50~60
Part water；
Described polyether Glycols side chain acrylic resin is obtained by following steps：By 20~30g polyether Glycols, 300
After~400mL toluene and the mixing of 50~60g acrylic acid, 0.1~0.3mL mass fractions are added for 96% sulfuric acid solution, 120
React after 3~4h, concentrated by rotary evaporation obtains concentrate, after concentrate and 200~300mL water are mixed, add at~130 DEG C
50~60g methacrylic acids and 0.1~0.3g initiators, react 60~90min at 60~70 DEG C.
The molecular weight of described polyether Glycols is 1000.
Described initiator is the one or more in sodium peroxydisulfate, lauroyl peroxide, potassium peroxydisulfate.
Described raw materials by weight portion also includes 15~20 parts of modified graphene oxides.
Described modified graphite is prepared by following steps：By 20~30g modified graphenes, 8~12g rhamnetins, 100
~200mL water and 0.1~0.3g ammonium persulfates, react after 60~90min at 80~90 DEG C and filter.
Described modified graphene is obtained by following steps：By 35~45g graphene oxide powders, 30~40g tongues
Moss and 400~500mL are added in fermentation tank, and stirring is mixed to get fermentation substrate, adds bacillus subtilis bacteria suspension,
Sealing and fermenting 15~20 days at 30~40 DEG C, high-temperature sterilization, centrifugation, obtain sediment, BSW are mixed after fermentation ends
Ultrasonic disperse, filtering, obtain graphene oxide after conjunction.
The concentration of described bacillus subtilis bacteria suspension is 105Cfu/mL, addition is the 8% of fermentation substrate quality.
A kind of preparation method of leather retanning agent, specific preparation process is：By polyether Glycols side chain acrylic resin, lemon
Sour aluminium, calgon and water are added in mixer, and stirring 30~40min of mixing, charging produces leather retanning agent.
The present invention is compared with other method, and advantageous effects are：
（1）The present invention carries out copolyreaction with methacrylic acid again with the product obtained after PTMEG and acroleic acid esterification, this
Invention improves the Selective filling performance of acrylic resin, Jin Erti by introducing the flexible side chain of PTMEG into polyacrylic acid
The talent for swimming and elasticity of high leather, then used cooperatively with aluminium tanningagent, it can also make its grain fine and smooth while leather suppleness is improved；
（2）By being fermented after graphite oxide is mixed with liver moss, microorganism in the present invention, the work on graphite oxide surface can be made
Property group increases, then by ultrasonic disperse, obtains graphene oxide, and graphene oxide is grafted with rhamnetin, graphite oxide
Alkene can be penetrated into leather fiber, acted on the active group formation chemical bonding on materials with hide glue fibril, and rhamnetin
In phenolic hydroxyl group can be acted on the basic group stroke chemical bondings of collagenous fibres, simultaneous oxidation graphene nano lamella is in fiber
Between produce nanometer size effect, the synergy of chemical bonding effect and nano effect can improve the shrinkage temperature of leather,
Filling capacity is improved, and then makes the soft plentiful of leather.
Embodiment
Polyether Glycols and 300~400mL toluene that 20~30g molecular weight is 1000 are taken to be added to thermometer and return
In the three-necked flask for flowing device, 50~60g acrylic acid is added, and three-necked flask immigration digital display is tested the speed constant temperature blender with magnetic force
In, it is 120~130 DEG C in temperature, rotating speed is under conditions of 300~400r/min, stirring is mixed after 3~5min, adds 0.1
~0.3mL mass fractions are 96% sulfuric acid solution, and insulated and stirred reacts 3~4h, after question response terminates, and product is placed in into rotation steams
Send out in instrument, 30~40min of concentrated by rotary evaporation obtains concentrate, concentrate and 200~300mL water are added to thermometer and
In the three-necked flask of reflux, flask is placed in water-bath, it is 60~70 DEG C to control bath temperature, then into three-necked flask
50~60g methacrylic acids and 0.1~0.3g initiators are added, insulated and stirred reacts 60~90min, obtains polyether Glycols branch
Chain acrylic resin, graphite oxide is added in freezing crusher and crushed, and crosses 80~100 mesh sieves, obtains graphite oxide powder
End, takes 35~45g graphite oxides powder, 30~40g liver mosses and 400~500mL water to be added in fermentation tank, and stirring mixing 3~
5min, obtains fermentation substrate, then it is 10 to add the concentration of fermentation substrate quality 8% into fermentation tank5Cfu/mL bacillus subtilises
Bacteria suspension, sealing and fermenting 15~20 days at 30~40 DEG C, after fermentation ends, tunning is placed in high-temperature sterilization box,
25~30min of high-temperature sterilization at 125~135 DEG C, obtains the material that sterilizes, and sterilizing material is placed in a centrifuge, with 4000~
5000r/min rotating speed centrifuges 5~10min, obtains sediment, sediment and 200~300mL water are added into beaker
In, beaker is placed in ultrasonic wave separating apparatus, disperses after 30~40min to filter with 45~50KHz frequency ultrasound, is aoxidized
Graphene, 20~30g modified graphene oxides, 8~12g rhamnetins and 100~200mL water are added to thermometer and returned
In the three-necked flask for flowing device, flask is placed in water-bath, it is 80~90 DEG C to control bath temperature, adds 0.1~0.3g
Ammonium persulfate, insulated and stirred is reacted to be filtered after 60~90min, is obtained modified graphene oxide, is finally counted by weight, takes 30
~40 parts of polyether Glycols side chain acrylic resins, 15~20 parts of modified graphene oxides, 3~5 parts of aluminium citrates, 1~3 part six
Sodium metaphosphate and 50~60 parts of water are added in mixer, and after 30~40min of stirring mixing, charging obtains leather retanning agent.It is described
Initiator be sodium peroxydisulfate, lauroyl peroxide, potassium peroxydisulfate in one or more.
Example 1
The polyether Glycols and 300mL toluene that 20g molecular weight is 1000 are taken to be added to three mouthfuls with thermometer and reflux
In flask, add 50g acrylic acid, and three-necked flask immigration digital display tested the speed in constant temperature blender with magnetic force, in temperature be 120
DEG C, rotating speed is under conditions of 300r/min, after stirring mixing 3min, it is 96% sulfuric acid solution to add 0.1mL mass fractions, is protected
Warm stirring reaction 3h, after question response terminates, product is placed in Rotary Evaporators, and concentrated by rotary evaporation 30min obtains concentrate, will
Concentrate and 200mL water are added in the three-necked flask with thermometer and reflux, and flask is placed in water-bath, control
Bath temperature is 60 DEG C, then addition 50g methacrylic acids and 0.1g sodium peroxydisulfates into three-necked flask, insulated and stirred reaction
60min, obtains polyether Glycols side chain acrylic resin, finally counts by weight, takes 30 parts of polyether Glycols side chain propylene
Acid resin, 3 parts of aluminium citrates, 1 part of calgon and 50 parts of water are added in mixer, after stirring mixing 30min, charging,
Obtain leather retanning agent.
Example 2
The polyether Glycols and 300mL toluene that 20g molecular weight is 1000 are taken to be added to three mouthfuls with thermometer and reflux
In flask, add 50g acrylic acid, and three-necked flask immigration digital display tested the speed in constant temperature blender with magnetic force, in temperature be 120
DEG C, rotating speed is under conditions of 300r/min, after stirring mixing 3min, it is 96% sulfuric acid solution to add 0.1mL mass fractions, is protected
Warm stirring reaction 3h, after question response terminates, product is placed in Rotary Evaporators, and concentrated by rotary evaporation 30min obtains concentrate, will
Concentrate and 200mL water are added in the three-necked flask with thermometer and reflux, and flask is placed in water-bath, control
Bath temperature is 60 DEG C, then addition 50g methacrylic acids and 0.1g lauroyl peroxides into three-necked flask, insulated and stirred reaction
60min, obtains polyether Glycols side chain acrylic resin, and graphite oxide is added in freezing crusher and crushed, and crosses 80 mesh
Sieve, obtains graphite oxide powder, takes 35g graphite oxides powder, 30g liver mosses and 400mL water to be added in fermentation tank, stirring mixing
3min, obtains fermentation substrate, then it is 10 to add the concentration of fermentation substrate quality 8% into fermentation tank5Cfu/mL bacillus subtilises
Bacteria suspension, sealing and fermenting 15 days at 30 DEG C, after fermentation ends, tunning is placed in high-temperature sterilization box, high at 125 DEG C
Temperature sterilizing 25min, obtains the material that sterilizes, and sterilizing material is placed in a centrifuge, centrifuged with 4000r/min rotating speed
5min, obtains sediment, and sediment and 200mL water are added in beaker, beaker is placed in ultrasonic wave separating apparatus, with
45KHz frequency ultrasound disperses after 30min to filter, and obtains graphene oxide, by 20g modified graphene oxides, 8g rhamnetins and
100mL water is added in the three-necked flask with thermometer and reflux, and flask is placed in water-bath, controls bath temperature
For 80 DEG C, filtered after adding 0.1g ammonium persulfates, insulated and stirred reaction 60min, modified graphene oxide is obtained, finally by weight
Measure number meter, take 30 parts of polyether Glycols side chain acrylic resins, 15 parts of modified graphene oxides, 3 parts of aluminium citrates, 1 part six
Sodium metaphosphate and 50 parts of water are added in mixer, and after stirring mixing 30min, charging obtains leather retanning agent.
Example 3
The polyether Glycols and 400mL toluene that 30g molecular weight is 1000 are taken to be added to three mouthfuls with thermometer and reflux
In flask, add 60g acrylic acid, and three-necked flask immigration digital display tested the speed in constant temperature blender with magnetic force, in temperature be 130
DEG C, rotating speed is under conditions of 400r/min, after stirring mixing 5min, it is 96% sulfuric acid solution to add 0.3mL mass fractions, is protected
Warm stirring reaction 4h, after question response terminates, product is placed in Rotary Evaporators, and concentrated by rotary evaporation 40min obtains concentrate, will
Concentrate and 300mL water are added in the three-necked flask with thermometer and reflux, and flask is placed in water-bath, control
Bath temperature is 70 DEG C, then addition 60g methacrylic acids and 0.3g potassium peroxydisulfates into three-necked flask, insulated and stirred reaction
90min, obtains polyether Glycols side chain acrylic resin, and graphite oxide is added in freezing crusher and crushed, and crosses 100 mesh
Sieve, obtains graphite oxide powder, takes 45g graphite oxides powder, 40g liver mosses and 500mL water to be added in fermentation tank, stirring mixing
5min, obtains fermentation substrate, then it is 10 to add the concentration of fermentation substrate quality 8% into fermentation tank5Cfu/mL bacillus subtilises
Bacteria suspension, sealing and fermenting 20 days at 40 DEG C, after fermentation ends, tunning is placed in high-temperature sterilization box, high at 135 DEG C
Temperature sterilizing 30min, obtains the material that sterilizes, and sterilizing material is placed in a centrifuge, centrifuged with 5000r/min rotating speed
10min, obtains sediment, and sediment and 300mL water are added in beaker, beaker is placed in ultrasonic wave separating apparatus, with
50KHz frequency ultrasound disperses after 40min to filter, and obtains graphene oxide, by 30g modified graphene oxides, 12g rhamnetins and
200mL water is added in the three-necked flask with thermometer and reflux, and flask is placed in water-bath, controls bath temperature
For 90 DEG C, filtered after adding 0.3g ammonium persulfates, insulated and stirred reaction 90min, modified graphene oxide is obtained, finally by weight
Measure number meter, take 40 parts of polyether Glycols side chain acrylic resins, 20 parts of modified graphene oxides, 5 parts of aluminium citrates, 3 part six
Sodium metaphosphate and 60 parts of water are added in mixer, and after stirring mixing 40min, charging obtains leather retanning agent.
Leather retanning agent application experiment：
Take the goat upper wet blue leather after a shaving to be tested, it be uniformly split into five pieces, label be respectively 1#, 2#,
3#、4#、5#.3#, 4#, 5# are used as tanning agent, 1# Sichuan DESAY thatizations with leather retanning agent made from present example 1~3 respectively
The acrylic resin retanning agent DESOTAN SV of work Industrial Co., Ltd. production are as tanning agent, and the auspicious chemical industry in 2# Tianjin Anji has
The chrome tanning agent of limit company production is used as tanning agent.
Above-mentioned leather and correspondence tanning agent are tested by following implementing process respectively：
Leather, degreasing（40℃、30min）, wash（40℃、10min）, tanning（40℃、120min）, neutralize（60min）, stuffing
（50℃、60min）, solid oil（50 DEG C, 30~40min）, washing（Current wash 10min, take horse and stand overnight）；
Tanning effect detection：By the leather shrinking temperature respectively to above-mentioned PROCESS FOR TREATMENT of detection method in GB4689.5-1984, anti-
Zhang Qiangdu and elongation, collapse brokenly intensity and collapse brokenly height detected；
Finished leather organoleptic properties are evaluated：The method touched with hand is evaluated its flexibility and richness.
Testing result is as shown in table 1 below：
The leather retanning agent tannin effect of table 1
In summary, leather retanning agent produced by the present invention can be improved the shrinkage temperature of leather, while the leather of tanning
Tensile strength and elongation at break have reached the standard that uses, and soft plentiful, and grain is fine and smooth, it is adaptable to a variety of leathers
Tanning, with good application prospect.
Claims (8)
1. a kind of leather retanning agent, it is characterised in that include the raw material of following parts by weight：
30~40 parts of polyether Glycols side chain acrylic resins, 3~5 parts of aluminium citrates, 1~3 part of calgon and 50~60
Part water；
Described polyether Glycols side chain acrylic resin is obtained by following steps：By 20~30g polyether Glycols, 300
After~400mL toluene and the mixing of 50~60g acrylic acid, 0.1~0.3mL mass fractions are added for 96% sulfuric acid solution, 120
React after 3~4h, concentrated by rotary evaporation obtains concentrate, after concentrate and 200~300mL water are mixed, add at~130 DEG C
50~60g methacrylic acids and 0.1~0.3g initiators, react 60~90min at 60~70 DEG C.
2. a kind of leather retanning agent according to claim 1, it is characterised in that the molecular weight of described polyether Glycols is
1000。
3. a kind of leather retanning agent according to claim 1, it is characterised in that described initiator is sodium peroxydisulfate, mistake
Aoxidize the one or more in lauroyl, potassium peroxydisulfate.
4. a kind of leather retanning agent according to claim 1, it is characterised in that described raw materials by weight portion also includes
15~20 parts of modified graphene oxides.
5. a kind of leather retanning agent according to claim 4, it is characterised in that described modified graphite is by following steps
Prepare：By 20~30g modified graphenes, 8~12g rhamnetins, 100~200mL water and 0.1~0.3g ammonium persulfates, 80
React after 60~90min and filter at~90 DEG C.
6. a kind of leather retanning agent according to claim 5, it is characterised in that described modified graphene is by following step
Suddenly obtain：35~45g graphene oxide powders, 30~40g liver mosses and 400~500mL are added in fermentation tank, stirring is mixed
Conjunction obtains fermentation substrate, adds bacillus subtilis bacteria suspension, sealing and fermenting 15~20 days, fermentation ends at 30~40 DEG C
High-temperature sterilization, centrifugation, obtain sediment afterwards, and ultrasonic disperse, filtering, obtain graphene oxide after BSW is mixed.
7. a kind of leather retanning agent according to claim 6, it is characterised in that described bacillus subtilis bacteria suspension
Concentration is 105Cfu/mL, addition is the 8% of fermentation substrate quality.
8. a kind of preparation method of leather retanning agent as described in claim 1, it is characterised in that specifically preparation process is：Will
Polyether Glycols side chain acrylic resin, aluminium citrate, calgon and water are added in mixer, and stirring mixing 30~
40min, charging, obtains leather retanning agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710510212.8A CN107326123B (en) | 2017-06-28 | 2017-06-28 | A kind of leather retanning agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710510212.8A CN107326123B (en) | 2017-06-28 | 2017-06-28 | A kind of leather retanning agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107326123A true CN107326123A (en) | 2017-11-07 |
| CN107326123B CN107326123B (en) | 2019-08-30 |
Family
ID=60199017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710510212.8A Active CN107326123B (en) | 2017-06-28 | 2017-06-28 | A kind of leather retanning agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107326123B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331237A (en) * | 2019-06-21 | 2019-10-15 | 李新根 | A kind of preparation method of leather fat |
| WO2020002979A1 (en) * | 2018-06-28 | 2020-01-02 | Gruppo Mastrotto S.P.A. | Thermally dispersing and electrically conductive processed leather |
| CN112694740A (en) * | 2020-12-10 | 2021-04-23 | 常州迪声声学科技有限公司 | Shock-resistant automobile front baffle shock pad and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506198A (en) * | 2015-12-01 | 2016-04-20 | 陕西科技大学 | Preparation method of green and environmental protection tanning agent |
| CN106148586A (en) * | 2015-04-06 | 2016-11-23 | 王金山 | Leather two-property retanning agent technology |
| CN106478884A (en) * | 2016-09-30 | 2017-03-08 | 陕西科技大学 | A kind of starch conversion 2-(Acryloyloxy)ethanol and the preparation method of aluminum complex tanning agent |
-
2017
- 2017-06-28 CN CN201710510212.8A patent/CN107326123B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148586A (en) * | 2015-04-06 | 2016-11-23 | 王金山 | Leather two-property retanning agent technology |
| CN105506198A (en) * | 2015-12-01 | 2016-04-20 | 陕西科技大学 | Preparation method of green and environmental protection tanning agent |
| CN106478884A (en) * | 2016-09-30 | 2017-03-08 | 陕西科技大学 | A kind of starch conversion 2-(Acryloyloxy)ethanol and the preparation method of aluminum complex tanning agent |
Non-Patent Citations (1)
| Title |
|---|
| 苏秀霞: "丙烯酸树脂与铝配合物鞣剂的合成及其应用", 《西北轻工业学院学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020002979A1 (en) * | 2018-06-28 | 2020-01-02 | Gruppo Mastrotto S.P.A. | Thermally dispersing and electrically conductive processed leather |
| CN110331237A (en) * | 2019-06-21 | 2019-10-15 | 李新根 | A kind of preparation method of leather fat |
| CN112694740A (en) * | 2020-12-10 | 2021-04-23 | 常州迪声声学科技有限公司 | Shock-resistant automobile front baffle shock pad and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107326123B (en) | 2019-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107326123A (en) | A kind of leather retanning agent and preparation method thereof | |
| JP4919136B2 (en) | Modified microfibrillated cellulose and resin composite material containing the same | |
| CN1142253A (en) | Stirring processes for preparing biodegrable fibrils, nonwoven fabrics comprising the biodegrable fibrils and articles comprising the non-woven fabrics | |
| CN106191337B (en) | A kind of leather retanning agent and preparation method thereof | |
| CN101410419A (en) | Water-absorbing resin partilce agglomerates and process for produciton thereof | |
| CN110003629A (en) | A kind of biology base high-ductility poly (lactic acid) composition and preparation method thereof | |
| CN108841169A (en) | A kind of High-performance graphene nylon 6 composite material preparation method | |
| CN107474343A (en) | The method that one kettle way prepares ascidian nano micro crystal cellulose/rubber nano composite material | |
| KR100499010B1 (en) | Bacterial Cellulose Concentrates and Methods of Treatment of These Concentrates | |
| CN102199257B (en) | Preparation method of modified polylactic acid | |
| CN101473887B (en) | Method for separating and recycling protein in bean curd yellow pulp water using membrane | |
| CN103450643B (en) | Cellulose nanocrystal and the method for aliphatic polyester compatibility is improved with phthalic anhydride | |
| CN108797224A (en) | A kind of preparation method of disposable paper cup | |
| Pan et al. | Leather wastes into high-value chemicals: Keratin-based retanning agents via UV-initiated polymerization | |
| CN107723390A (en) | A kind of renovation process of Leather Waste | |
| CN113845721A (en) | Preparation method and application of anti-sticking modified polypropylene food packaging film | |
| CN109054561A (en) | A kind of preparation method of polyacrylate coatings glue | |
| CN108559806A (en) | A kind of Animal Skin processing method for tanning | |
| Riyapan et al. | “Green synthesis” and characterization of a maleated epoxidized natural rubber latex | |
| CN107050217A (en) | A kind of preparation method of aloe gel | |
| CN1298954A (en) | Process for extracting collagenic polypeptide from chrome leather dregs to prepare coating agent and retanning agent | |
| CN113980090B (en) | Method for recycling biological source protein by using biological medicine fermentation fungus dreg | |
| CN106833431B (en) | A kind of adhesive and its preparation method and application | |
| CN105031720B (en) | A kind of nanometer hydroxyapatite polyamide medical composite material and preparation method thereof | |
| CN107164587A (en) | A kind of leather fat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190805 Address after: 251800 Yangxin County, Binzhou City, Shandong Province Applicant after: Yangxin Huayang Group Co., Ltd. Address before: 213102 No. 32 Labor West Road, Tianning District, Changzhou City, Jiangsu Province Applicant before: Changzhou Jie Xuan Textile Technology Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Leather tanning agent and its preparation method Effective date of registration: 20210319 Granted publication date: 20190830 Pledgee: Shandong Yangxin rural commercial bank Limited by Share Ltd. Pledgor: Yangxin Huayang Group Co.,Ltd. Registration number: Y2021980001873 |