CN106589420A - Preparation method for low-chloropropanol PAE papermaking wet strength agent - Google Patents
Preparation method for low-chloropropanol PAE papermaking wet strength agent Download PDFInfo
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- CN106589420A CN106589420A CN201510928193.1A CN201510928193A CN106589420A CN 106589420 A CN106589420 A CN 106589420A CN 201510928193 A CN201510928193 A CN 201510928193A CN 106589420 A CN106589420 A CN 106589420A
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- low
- wet strength
- strength agent
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- epoxychloropropane
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/246—Intercrosslinking of at least two polymers
-
- 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
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/48—Polymers modified by chemical after-treatment
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/56—Polyamines; Polyimines; Polyester-imides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
- D21H21/20—Wet strength agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
Abstract
The invention discloses a preparation method for a low-chloropropanol PAE papermaking wet strength agent. Firstly, epoxy chloropropane is slowly added into intermediate polyamides synthesized by diacid and polyamines through condensation polymerization under the low temperature condition, and a sodium hydroxide solution is continuously dripped for maintaining the pH of a system to be 10-12; secondly, after heat preservation is conducted for certain time, sulfuric acid is added, the pH of the reaction system is adjusted to 5.5-6.5, the temperature is increased to 40-60 DEG C, and then heat preservation is conducted; and thirdly, after the viscosity is increased to the preset viscosity, sulfuric acid and water are added, and the low-chloropropanol PAE papermaking wet strength agent is obtained. According to the method, by controlling the pH of the system, the activity of the polyamines is improved, hydrolyzing of the epoxy chloropropane is restrained, and the low-chloropropanol envinronment-friendly papermaking wet strength agent with the high conversion rate is prepared.
Description
Technical field
This explanation designs a kind of PAE wet strength agent for papermaking, especially designs a kind of preparation side of low chloropropyl alcohol PAE wet strength agent for papermaking
Method.
Background technology
The sixties in 20th century, PAE wet strength agent for papermaking starts to be applied to paper industry, and because it does not have free formaldehyde,
Low feature is required to the pH value of slurry, becomes current most widely used wet strength agent for papermaking.
PAE wet strength agent for papermaking is a kind of water-soluble cationic thermosetting resin, and its preparation method is generally by more
First acid and polyamine polycondensation generate polyamide, then form alkylatable secondary amine group with epoxychloropropane, and further convert
For 3- hydroxy azetidine groups.But, PAE wet strength agent for papermaking equally exists a drawback, i.e. epoxychloropropane hydrolysis is produced
Raw chloropropyl alcohol, based on the chloro- 2- propyl alcohol of 1,3- bis-.Certified to be, chloropropyl alcohol is a kind of carcinogenic substance of medium poison class,
The generation of male sex hormone can be suppressed, spermatozoon activity is reduced, and the liver to human body, kidney, nervous system, blood circulation system can
Cause toxic action.
At present, in the wet strength agent for papermaking product of the solid content 12.5% of domestic production, chloropropyl alcohol residual quantity typically in 1%-6%,
Be higher by more than even two orders of magnitude than the residual quantity of International Paper's wet strength agent chloropropyl alcohol, such as US5614597 and
The residual quantity of the chloro- 2- propyl alcohol of product 1,3- bis- is respectively 0.1298% and below 5ppm in US6342580B1.And, most of chlorine
The removal of propyl alcohol focuses mostly on and is processed in the later stage, i.e., chloropropyl alcohol is removed after the completion of production, easily causes product defects so as to promote
Using being restricted.Such as, US6429267B1 adopts product later stage alkali process, easily plays the acid of stability action with resin
Salt is generated, is unfavorable for that product is promoted in some fields.
This patent by optimize course of reaction process conditions, without any later stage process, so as to realize product in chloropropyl alcohol
Reduction.Topmost mode is reaction system pH=10-12 during control early stage low temperature long-time heat preservation, improves polyamide
Reactivity, suppresses the hydrolysis of epoxychloropropane, improves the conversion ratio of epoxychloropropane.Meanwhile, the present invention is using the viscous reaction of liter
Front addition sulfuric acid, reaches the viscous speed of liter controllable, it is to avoid product gel.
The content of the invention
Present invention aims to chloropropyl alcohol too high levels problem in current PAE wet strength agent for papermaking, discloses a kind of low chlorine third
The preparation method of alcohol PAE wet strength agent for papermaking.
The method of the present invention comprises the steps:
（1）It is 1 by the mol ratio of polyamide and epoxychloropropane:0.5-1：0.8, using dropping funel by epoxychloropropane dropwise
High solids content is added in the polyamide of 50%-60%, time for adding is controlled in 45min-90min, and dropwise addition process utilizes cold bath
By temperature control at 10-25 DEG C；
（2）After being added dropwise to complete at a temperature of 10-25 DEG C insulation reaction 60min-480min, due in insulating process pH value gradually under
Drop, is maintained pH value between 10-12 using the mode of uninterrupted addition NaOH；
（3）After insulation terminates, moderate amount of sulfuric acid is added, pH value of reaction system is adjusted to into 5.5-7；Heating is opened, 40-60 DEG C is warming up to
After be incubated, insulating process viscosity is raised, and adds sulfuric acid when question response reaches viscosity immediately, pH is adjusted to 2-3, terminating reaction,
Solid content 20-30% is diluted with water to, low chloropropyl alcohol PAE wet strength agent for papermaking is obtained final product.
Step（1）In, adding materials stage and holding stage in cold bath, temperature control reduces epoxy chlorine at 10-25 DEG C
The hydrolysis of propane；Simultaneously polyamide and epoxychloropropane are exothermic reaction, control low temperature, are conducive to improving reaction conversion ratio.
Step（2）In, adding materials stage and holding stage in cold bath, pH value is controlled between 10-12, and high ph-values are anti-
Under the conditions of answering, be conducive to improving the reactivity of polyamide, lift conversion ratio；Meanwhile, suppress the hydrolysis of epoxychloropropane, and its
The transformation of chloropropyl alcohol molecular structure, reduces chloropropyl alcohol content.
Step（3）In, after cold bath insulation terminates, moderate amount of sulfuric acid is added, pH value of reaction system is adjusted to into 5.5-6.5,
Under low ph value state, cross-linking reaction speed slows down, and reduces rising viscous speed, it is to avoid production process gel.
Polyamide is synthesized by adipic acid and diethylenetriamine, and reaction equation refers to Figure of description 1.
For the ease of writing, spy writes a Chinese character in simplified form polyamide such as Figure of description 2.
Step（1）Middle polyamide refers to Figure of description 3 with the building-up process of epoxychloropropane.
Polyamide and epichlorohydrin reaction, may generate four kinds of structures, as above scheme（a）、（b）、（c）、（d）, wherein, with（a）
With（b）Based on.
In course of reaction, epoxychloropropane hydrolysis that may be present refers to Figure of description 4.
Step（2）In, NaOH is added, pH is between 10～12 for control, improves the reactivity of polyamide, suppresses epoxy chlorine
The hydrolysis of propane, possible reaction equation refers to Figure of description 5.
Step（3）In crosslink reaction, the structure after crosslinking may be Figure of description 6.
Of the invention maximum the characteristics of is by sides such as the highly concentrated long-time reaction of early stage low temperature and stable reaction systems pH=10-12
Formula, improves conversion rate of products, reduces the hydrolysis of epoxychloropropane.Additionally, another characteristic of the present invention is to be added by mid-term
Enter acid to realize rising the controllability of viscous reaction.And, the low chloropropyl alcohol PAE wet strength agent for papermaking for being produced is 6 months under normal temperature preservation
Interior viscosity is unchanged.
Fig. 1 is polyamide by adipic acid and diethylenetriamine synthetic reaction formula,
Fig. 2 writes a Chinese character in simplified form for polyamide,
Fig. 3 is step（1）The building-up process of middle polyamide and epoxychloropropane,
Fig. 4 is epoxychloropropane hydrolysis that may be present,
Fig. 5 is step（2）The possible reaction equation of hydrolysis of middle suppression epoxychloropropane,
Fig. 6 is step（3）In crosslink reacted structure.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention not limited to this.
Embodiment 1
By 102.30g（0.70mol）Adipic acid and 79.44g（0.77mol）Diethylenetriamine is placed in equipped with electric mixer, temperature
Degree meter, the 500ml there-necked flasks of condenser.In the presence of 170 DEG C and catalyst methanesulfonic acid, after reacting 6 hours, add water
The solid content of 175.00g adjustment polyamide is 52%.
The polyamide that 100.00g solid contents are 52% is placed in equipped with electric mixer, thermometer, pH meter, dropping funel
In 500ml four-neck flasks, and using water-bath mode.Electric mixer is first opened, setting rotating speed is 200rpm, recycles dropping liquid leakage
Bucket is added dropwise over 13.55g epoxychloropropane, and it is 50min or so to control time for adding, and dropping temperature is less than 25 DEG C.Ring chlorine drips
Plus after finishing, at such a temperature 2 hours are incubated, and add the sodium hydroxide solution of 0.1g/ml at any time, maintain pH value of reaction system
In 11.0-11.5.
After insulation terminates, appropriate 30% sulfuric acid is added, pH value is adjusted to into 6.0；The heating power supply of water bath is opened, temperature is treated
It is incubated after rising to 60 DEG C.When question response reaches viscosity, 10% sulfuric acid 23.52g and water 205.01g is added, solid content is adjusted to into 20%,
PH value is adjusted to 2.98, obtains final product low chloropropyl alcohol PAE wet strength agent for papermaking.According to standard method JY/T 003-1996, surveyed using GC/MS
The content of chloropropyl alcohol in its product, by copy paper experiment its wet epistasis energy is surveyed, and is placed in 45 DEG C of drying boxes, observes it
Gelatin phenomenon.
Embodiment 2
The synthesis of polyamide is placed in the polyamide that 100.10g solid contents are 52% equipped with electric mixer, temperature with reference to embodiment 1
In degree meter, pH meter, the 500ml four-neck flasks of dropping funel, and using water-bath mode.Electric mixer is first opened, rotating speed is set
For 200rpm, recycle dropping funel to be added dropwise over 13.55g epoxychloropropane, control time for adding for 50min or so, drop
Plus temperature is less than 25 DEG C.After ring chlorine completion of dropping, at such a temperature 4 hours are incubated, and add the NaOH of 0.1g/ml at any time
Solution, maintains pH value of reaction system in 11.0-11.5.
After insulation terminates, appropriate 30% sulfuric acid is added, pH value is adjusted to into 6.2；The heating power supply of water bath is opened, temperature is treated
Rise to 60 DEG C of follow-up continuation of insurance temperature.When question response reaches viscosity, 10% sulfuric acid 23.54g and water 205.05g is added, solid content is adjusted to
20%, pH value is adjusted to 2.91, obtains final product low chloropropyl alcohol PAE wet strength agent for papermaking.According to standard method JY/T 003-1996, using GC/
MS surveys the content of chloropropyl alcohol in its product, and by copy paper experiment its wet epistasis energy is surveyed, and is placed in 45 DEG C of drying boxes, sees
Examine its gelatin phenomenon.
Embodiment 3
The synthesis of polyamide is placed in the polyamide that 100.04g solid contents are 52% equipped with electric mixer, temperature with reference to embodiment 1
In degree meter, pH meter, the 500ml four-neck flasks of dropping funel, and using water-bath mode.Electric mixer is first opened, rotating speed is set
For 200rpm, recycle dropping funel to be added dropwise over 13.60g epoxychloropropane, control time for adding for 50min or so, drop
Plus temperature is less than 25 DEG C.After ring chlorine completion of dropping, at such a temperature 2 hours are incubated, and add the NaOH of 0.1g/ml at any time
Solution, maintains pH value of reaction system in 12.0-12.5.
After insulation terminates, appropriate 30% sulfuric acid is added, pH value is adjusted to into 5.5；The heating power supply of water bath is opened, temperature is treated
Rise to 60 DEG C of follow-up continuation of insurance temperature.When question response reaches viscosity, 10% sulfuric acid 23.50g and water 205.01g is added, solid content is adjusted to
20%, pH value is adjusted to 2.81, obtains final product low chloropropyl alcohol PAE wet strength agent for papermaking.According to standard method JY/T 003-1996, using GC/
MS surveys the content of chloropropyl alcohol in its product, and by copy paper experiment its wet epistasis energy is surveyed, and is placed in 45 DEG C of drying boxes, sees
Examine its gelatin phenomenon.
Embodiment 4
The synthesis of polyamide is placed in the polyamide that 100.08g solid contents are 52% equipped with electric mixer, temperature with reference to embodiment 1
In degree meter, pH meter, the 500ml four-neck flasks of dropping funel, and using water-bath mode.Electric mixer is first opened, rotating speed is set
For 200rpm, recycle dropping funel to be added dropwise over 18.07g epoxychloropropane, control time for adding for 50min or so, drop
Plus temperature is less than 25 DEG C.After ring chlorine completion of dropping, at such a temperature 4 hours are incubated, and add the NaOH of 0.1g/ml at any time
Solution, maintains pH value of reaction system in 11.0-11.5.
After insulation terminates, appropriate 30% sulfuric acid is added, pH value is adjusted to into 6.1；The heating power supply of water bath is opened, temperature is treated
Rise to 60 DEG C of follow-up continuation of insurance temperature.When question response reaches viscosity, 10% sulfuric acid 23.58g and water 205.04g is added, solid content is adjusted to
20%, pH value is adjusted to 2.94, obtains final product low chloropropyl alcohol PAE wet strength agent for papermaking.According to standard method JY/T 003-1996, using GC/
MS surveys the content of chloropropyl alcohol in its product, and by copy paper experiment its wet epistasis energy is surveyed, and is placed in 45 DEG C of drying boxes, sees
Examine its gelatin phenomenon.
Comparative example 1
Comparative example 1 does not simply adopt NaOH regulation system pH with reference to the experimental procedure of embodiment 1, comprises the following steps that：
The polyamide that 100.01g solid contents are 52% is placed in equipped with electric mixer, thermometer, pH meter, dropping funel
In 500ml four-neck flasks, and using water-bath mode.Electric mixer is first opened, setting rotating speed is 200rpm, recycles dropping liquid leakage
Bucket is added dropwise over 13.54g epoxychloropropane, and it is 50min or so to control time for adding, and dropping temperature is less than 25 DEG C.Ring chlorine drips
Plus after finishing, it is incubated 2 hours at such a temperature.
After insulation terminates, appropriate 30% sulfuric acid is added, pH value is adjusted to into 6.0；The heating power supply of water bath is opened, temperature is treated
Rise to 60 DEG C of follow-up continuation of insurance temperature.When question response reaches viscosity, 10% sulfuric acid 23.52g and water 205.08g is added, solid content is adjusted to
20%, pH value is adjusted to 3.01, you can obtain PAE wet strength agent for papermaking.According to standard method JY/T 003-1996, it is surveyed using GC/MS
The content of chloropropyl alcohol in product, by copy paper experiment its wet epistasis energy is surveyed, and is placed in 45 DEG C of drying boxes, is observed it and is coagulated
Glue phenomenon.
Comparative example 2
The synthesis of polyamide is placed in the polyamide polyamine that 100.02g solid contents are 52% equipped with electric stirring with reference to embodiment 1
In device, thermometer, pH meter, the 500ml four-neck flasks of dropping funel, and using water-bath mode.Electric mixer is first opened, is arranged
Rotating speed is 200rpm, recycles dropping funel to be added dropwise over 13.56g epoxychloropropane, and it is that 50min is left to control time for adding
The right side, dropping temperature is less than 25 DEG C.After ring chlorine completion of dropping, at such a temperature 2 hours are incubated, and add the hydrogen of 0.1g/ml at any time
Sodium hydroxide solution, maintains pH value of reaction system in 11.0-11.5.
After insulation terminates, the heating power supply of water bath is opened, after temperature rises to 60 DEG C, close power supply and be incubated.Open
Begin to rise viscous rear rapid gel.
Comparative example 3
The synthesis of polyamide is placed in the polyamide that 100.05g solid contents are 52% equipped with electric mixer, temperature with reference to embodiment 1
In degree meter, pH meter, the 500ml four-neck flasks of dropping funel, and using water-bath mode.Electric mixer is first opened, rotating speed is set
For 200rpm, recycle dropping funel to be added dropwise over 13.58g epoxychloropropane, control time for adding for 50min or so, drop
Plus temperature is less than 25 DEG C.After ring chlorine completion of dropping, 4 hours are incubated at such a temperature.
After insulation terminates, the heating power supply of water bath is opened, treat that temperature rises to 60 DEG C of follow-up continuation of insurance temperature.Question response reaches viscous
When spending, 10% sulfuric acid 28.90g and water 200.11g is added, solid content is adjusted to into 20%, pH value is adjusted to 3.18, obtains final product PAE papermaking wet
Strong agent.According to standard method JY/T 003-1996, the content of chloropropyl alcohol in its product is surveyed using GC/MS, surveyed by copy paper experiment
Its wet epistasis energy, and be placed in 45 DEG C of drying boxes, observe its gelatin phenomenon.
The experiment of the wet epistasis energy of product
Slurry adopts Guangning " Ding Feng " wooden oar plate, and slurry concentration is 1.53%, the SR of beating degree 35.Wet strength agent product dilutes 200
Times, addition is calculated by solid content 12.5% and is 20kg liquid/t paper, quantification of 40 g/m of paper target2, sample is through 105
DEG C cooked at constant 20min, impregnates 30S process.After handsheet, test by national standard method.
The measure of the wet epistasis energy of the product of table 1
| Numbering | Quantitatively（g/m2） | Wet tensile strength（N） |
| Commercially available prod | 40.14 | 3.03 |
| Embodiment 1 | 40.34 | 3.11 |
| Embodiment 2 | 40.02 | 3.05 |
| Embodiment 3 | 39.70 | 3.16 |
| Embodiment 4 | 39.28 | 3.02 |
| Comparative example 1 | 39.38 | 3.07 |
| Comparative example 3 | 40.01 | 2.96 |
The measure of the product chloropropyl alcohol content of table 2
| Numbering | Solid content（%） | The chloro- 2- propyl alcohol of 1,3- bis-（%） | The chloro- 1,2- propane diols of 3-（%） |
| Commercially available prod | 12.48 | 1.42 | 0.44 |
| Embodiment 1 | 20.23 | 0.24 | 0.051 |
| Embodiment 2 | 20.98 | 0.19 | 0.046 |
| Embodiment 3 | 19.87 | 0.11 | 0.030 |
| Embodiment 4 | 20.07 | 0.31 | 0.062 |
| Comparative example 1 | 19.79 | 1.36 | 0.75 |
| Comparative example 3 | 21.06 | 1.20 | 0.68 |
The product stability of table 3 is determined
| Numbering | Product stability |
| Embodiment 1 | Not gel in 6 months |
| Embodiment 2 | Not gel in 6 months |
| Embodiment 3 | Not gel in 6 months |
| Embodiment 4 | Not gel in 6 months |
| Comparative example 1 | Not gel in 6 months |
| Comparative example 2 | Course of reaction gel |
| Comparative example 3 | Gel after 15 days |
Claims (4)
1. a kind of preparation method of low chloropropyl alcohol PAE wet strength agent for papermaking, it is characterised in that it is comprised the following steps：
It is 1 by the mol ratio of polyamide and epoxychloropropane:0.5-1：0.8, epoxychloropropane is dropwise added using dropping funel
In entering the polyamide that high solids content is 50%-60%, in 45min-90min, process is added dropwise will using cold bath for time for adding control
Temperature control is at 10-25 DEG C；After being added dropwise to complete at a temperature of 10-25 DEG C insulation reaction 60min-480min, due to insulating process
Middle pH value is gradually reduced, and pH value is maintained between 10-12 using the mode of uninterrupted addition NaOH；After insulation terminates,
Moderate amount of sulfuric acid is added, pH value of reaction system is adjusted to into 5.5-6.5；Heating is opened, is incubated after being warming up to 40-60 DEG C, insulating process
Viscosity is raised, and adds sulfuric acid immediately when predetermined viscosity is reached, and pH is adjusted to 2-3, terminating reaction, is diluted with water to solid content
20-30%, obtains final product low chloropropyl alcohol PAE wet strength agent for papermaking.
2. the preparation method of a kind of low chloropropyl alcohol PAE wet strength agent for papermaking according to claim 1, it is characterised in that cold water
Add materials stage and holding stage are bathed, temperature control reduces the hydrolysis of epoxychloropropane at 10-25 DEG C；Simultaneously polyamide with
Epoxychloropropane is exothermic reaction, controls low temperature, is conducive to lifting reaction conversion ratio.
3. the preparation method of a kind of low chloropropyl alcohol PAE wet strength agent for papermaking according to claim 1, it is characterised in that cold water
Add materials stage and holding stage are bathed, pH value is controlled between 10-12, under high ph-values reaction condition, be conducive to improving polyamides
The reactivity of amine, lifts conversion ratio；Meanwhile, suppress the hydrolysis of epoxychloropropane, and its transformation of chloropropyl alcohol molecular structure, drop
Low chloropropyl alcohol content.
4. the preparation method of a kind of low chloropropyl alcohol PAE wet strength agent for papermaking according to claim 1, it is characterised in that cold water
Bath insulation adds moderate amount of sulfuric acid after terminating, and pH value of reaction system is adjusted to into 5.5-6.5, under low ph value state, cross-linking reaction speed
Slow down, reduce rising viscous speed, it is to avoid course of reaction gel.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109369909A (en) * | 2018-12-08 | 2019-02-22 | 浙江百斯特化工有限公司 | A kind of cation wet strength agent and preparation method thereof |
| CN112796158A (en) * | 2021-01-20 | 2021-05-14 | 上海东升新材料有限公司 | High-solid low-chlorine water repellent agent and preparation method thereof |
| CN113024806A (en) * | 2021-03-10 | 2021-06-25 | 浙江理工大学 | Low-chlorine environment-friendly PAE wet strength agent and synthesis method thereof |
| CN113150271A (en) * | 2021-04-13 | 2021-07-23 | 浙江理工大学 | Preparation method of low-chlorine composite PAE wet strength agent |
| CN113832770A (en) * | 2021-10-29 | 2021-12-24 | 杭州绿邦科技有限公司 | Preparation method of efficient wet strength agent for paper |
| CN114213654A (en) * | 2021-12-31 | 2022-03-22 | 浙江百斯特化工有限公司 | Preparation method of cationic polyamide wet strength agent, product and application thereof |
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| CN109369909A (en) * | 2018-12-08 | 2019-02-22 | 浙江百斯特化工有限公司 | A kind of cation wet strength agent and preparation method thereof |
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| CN113024806A (en) * | 2021-03-10 | 2021-06-25 | 浙江理工大学 | Low-chlorine environment-friendly PAE wet strength agent and synthesis method thereof |
| CN113150271A (en) * | 2021-04-13 | 2021-07-23 | 浙江理工大学 | Preparation method of low-chlorine composite PAE wet strength agent |
| CN113832770A (en) * | 2021-10-29 | 2021-12-24 | 杭州绿邦科技有限公司 | Preparation method of efficient wet strength agent for paper |
| CN114213654A (en) * | 2021-12-31 | 2022-03-22 | 浙江百斯特化工有限公司 | Preparation method of cationic polyamide wet strength agent, product and application thereof |
| CN114213654B (en) * | 2021-12-31 | 2023-10-20 | 浙江百斯特化工有限公司 | Preparation method of cationic polyamide wet strength agent, product and application thereof |
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