CN109535320A - A kind of preparation method of the modified drying strengthening agent of the polysaccharose substance that performance is controllable - Google Patents
A kind of preparation method of the modified drying strengthening agent of the polysaccharose substance that performance is controllable Download PDFInfo
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- CN109535320A CN109535320A CN201811318556.XA CN201811318556A CN109535320A CN 109535320 A CN109535320 A CN 109535320A CN 201811318556 A CN201811318556 A CN 201811318556A CN 109535320 A CN109535320 A CN 109535320A
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- agent
- added
- sodium
- polysaccharose substance
- drying strengthening
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
-
- 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
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
- D21H17/45—Nitrogen-containing groups
- D21H17/455—Nitrogen-containing groups comprising tertiary amine or being at least partially quaternised
-
- 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
Abstract
The invention discloses a kind of preparation methods of the modified drying strengthening agent of polysaccharose substance that performance is controllable, include the following steps: step 1, and modifying agent is added in polysaccharose substance and cationic etherifying agent prepares MODIFIED POLYSACCHARIDE；The MODIFIED POLYSACCHARIDE is mixed progress Raolical polymerizable with acrylamide monomers, initiator, complexing agent and water and obtains the modified drying strengthening agent of the polysaccharose substance by step 2.The present invention controls the molecular weight and functional group number of final drying strengthening agent by the control to polysaccharide molecular weight and degree of oxidation and additive amount, and then preferably controls the performance of drying strengthening agent.So that drying strengthening agent is provided with certain degradability simultaneously, also reduces cost.There is apparent advantage and broader practice prospect compared to traditional drying strengthening agent.
Description
Technical field
The present invention relates to papermaking dry-strengthening agent preparation technical fields, and in particular to dry strong using the modified paper grade (stock) of MODIFIED POLYSACCHARIDE
The preparation method of agent.
Background technique
Paper is that dosage is very big in people's life and work, and a kind of indispensable material.In the production process of paper usually
A variety of fillers, dyestuff, sizing agent and reinforcing agent etc. are added, wherein reinforcing agent mainly includes drying strengthening agent and wet strength agent.It is dry strong
Agent is mainly folding index, burst index, ring crush intensity, internal bond strength, tensile strength and the retention aid and filtering aid for improving paper
Energy.In the production of paper, drying strengthening agent is a kind of critically important additive.The polyacrylamide solution of certain molecular weight is with it
Excellent performance becomes the primary article in this field.But the primary raw material acrylamide of current polyacrylamide drying strengthening agent
It is petroleum-based feedstock, petroleum has non-renewable, and pure polyacrylamide is also slow in the biodegradation rate of nature,
Therefore exploitation is cheap with renewable raw materials preparation cost and the scheme of the low novel drying strengthening agent of pollution be one significantly
Work.
Polysaccharide is a kind of natural organic polymer, pollution-free, degradation is fast, from a wealth of sources, renewable, cheap.Cause
This studies a lot of at present.It by being modified processing to polysaccharide, and is more universal at present grind with organic monomer graft copolymerization
Study carefully direction.But there is presently no use the polysaccharide-modified report for preparing drying strengthening agent.
Summary of the invention
The present invention is intended to provide a kind of preparation method of the modified drying strengthening agent of polysaccharose substance that performance is controllable, to solve background
Drawbacks described above existing for technology.
The present invention realizes by the following technical solutions:
A kind of preparation method of the modified drying strengthening agent of the polysaccharose substance that performance is controllable, includes the following steps: step 1, more
Modifying agent is added in glucide and cationic etherifying agent prepares MODIFIED POLYSACCHARIDE；Step 2, by the MODIFIED POLYSACCHARIDE and acryloyl
Amine monomers, initiator, complexing agent and water mixing carry out Raolical polymerizable and obtain the modified drying strengthening agent of the polysaccharose substance.
Polysaccharide is the sugar chain combined by glycosidic bond, by the polymerization sugar macromolecule carbon hydrate formed more than 10 monosaccharide
Object can use general formula (C6H10O5)nIt indicates.The polysaccharose substance is selected from starch, and (including but not limited to: tapioca, corn form sediment
Powder, wheaten starch, lotus root starch, potato starch, bean starch), glucose, fructose, maltose, soluble polysaccharide, dextrin, ethoxy
In chitosan, carboxymethyl chitosan, carboxymethyl cellulose, guar gum, cellulose, hemicellulose, polyxylan and its derivative
At least one.
The preparation method of the MODIFIED POLYSACCHARIDE as a preferred technical solution, includes the following steps: to match polysaccharose substance
Suspension or solution is made, modifying agent is added and is reacted, cationic etherifying agent is then added, preparation cationization denaturation is more
Sugar obtains the MODIFIED POLYSACCHARIDE mixed liquor after reaction；The modifying agent includes at least two in alkaline matter, enzyme and oxidant
Kind.
Preferably, the concentration of the suspension or solution is 15-30wt%, is heated to 30-110 DEG C instead after modifying agent is added
0.5-2h is answered, then adjusts temperature to 40-90 DEG C, cationic etherifying agent, preparation cationization MODIFIED POLYSACCHARIDE is added.
The alkaline matter can select the alkali of this field routine, for example, sodium hydroxide, potassium hydroxide, ammonium hydroxide, sodium carbonate,
Potassium carbonate, ammonium hydroxide, organic amine etc., preferably sodium hydroxide.The effect of step 1 neutral and alkali substance mainly alkalizes polysaccharide, enhances
Hydrophily reduces solution viscosity, conducive to the progress of subsequent reactions.Its dosage is the 6-10% of the polysaccharose substance weight.
The enzyme is selected from alpha-amylase, beta amylase, gamma amylase, isoamylase, cellulase, hemicellulase
It is at least one.The effect of enzyme is to carry out Partial digestion to the polysaccharose substance, to adjust the molecular weight of polysaccharose substance, thus
Adjust target product -- the molecular weight of drying strengthening agent.The dosage of the enzyme is the 0.3-0.7% of the polysaccharose substance weight.
The oxidant is selected from at least one of sodium peroxydisulfate, potassium peroxydisulfate, ammonium persulfate, hydrogen peroxide, sodium hypochlorite.
The dosage of oxidant can control the degree of oxidation of polysaccharose substance, and then control target product-drying strengthening agent functional group number, from
And preferably regulate and control the dispersion performance of drying strengthening agent.Preferably, the dosage of the oxidant is the 2- of the polysaccharose substance weight
10%.
The above three classes modifying agent can exist simultaneously, and two of them also can be used, such as make using alkaline matter and enzyme
For the modifying agent of polysaccharose substance；Use enzyme and oxidant as the modifying agent of polysaccharose substance；Use alkaline matter and oxidation
Modifying agent of the agent as polysaccharose substance.Those skilled in the art are according to the actual use field of drying strengthening agent and wanting for dispersion performance
It asks, by the change of the type and dosage of modifying agent, a series of different degrees of degradation can be prepared, the denaturation of different oxidizabilities is more
Sugar obtains target product with vinyl acids graft copolymerization again later, and then obtains a series of modified drying strengthening agent of polysaccharose substances.
The cationic etherifying agent is selected from the chloro- 2- hydroxypropyl of 3--trimethyl ammonium chloride (CTA), 2,3- glycidyl front three
Ammonium chloride (ETA), in the chloro- 2- hydroxypropyl of 3--triethyl ammonium chloride (GTA), dodecyl dimethyl glycidyl ammonium chloride
At least one, it is preferred that the cationic etherifying agent dosage is the 8-40% of the polysaccharose substance weight.
Preferably, in the preparation step of the MODIFIED POLYSACCHARIDE, the degradation temperature that enzyme is added is 50-85 DEG C, and oxidation is added
Reaction temperature after agent is 50-90 DEG C.
As a preferred technical solution, in the Raolical polymerizable of step 2, the parts by weight of each component are as follows:
Wherein the dosage of MODIFIED POLYSACCHARIDE is the oven dry weight of MODIFIED POLYSACCHARIDE in the MODIFIED POLYSACCHARIDE mixed liquor.
Preferably, the acrylamide monomers be selected from acrylamide, Methacrylamide, N- isobutyl group acrylamide,
N tert butyl acrylamide, N phenyl acrylamide, acrylonitrile, acrylic acid, fumaric acid, itaconic acid, maleic anhydride, metering system
At least one of nitrile, cation acrylamide class monomer.
The complexing agent is selected from sodium ammonium triacetate (NTA), edetate (EDETATE SODIUM or four sodium), divinyl three
Amine pentacarboxylic acid salt (DTPA), tartaric acid, heptose hydrochlorate, sodium gluconate, sodium alginate, ethylenediamine tetraacetic methene sodium phosphate
(EDTMPS), diethylene triamine pentamethylene phosphonic salt (DETPMPS), the phosphatic at least one of three methene of amine.
The initiator is initiator commonly used in the art, such as ammonium persulfate, potassium peroxydisulfate, sodium peroxydisulfate, peroxidating
Hydrogen, tert-butyl hydroperoxide, cyclohexanone peroxide, benzoyl peroxide, azo-initiator, SODIUM PERCARBONATE, potassium percarbonate etc..
The dosage of water is not particularly limited, and those skilled in the art should be able to be according to the dispersion mixing situation of each component, solution
The adequacy of polymerization and the solid content needs of final products are adjusted.Preferably, the dosage of water is 170-500 parts.
It is further preferred that the temperature of the Raolical polymerizable is 50-100 DEG C, reaction time 1-8h.
The present invention prepares different degrees of degradation, no by the change of the type and dosage etc. of adjustment, modifying agent to technique
With the MODIFIED POLYSACCHARIDE of oxidizability.Prepare drying strengthening agent again later.Pass through the control to polysaccharide molecular weight and degree of oxidation and additive amount
System further controls the molecular weight and functional group number of final drying strengthening agent, and then preferably controls the performance of drying strengthening agent.Make to do simultaneously
Strong agent is provided with certain degradability, also reduces cost.There is apparent advantage and broader compared to traditional drying strengthening agent
Application prospect.
Specific embodiment
The present invention is illustrated below by specific embodiment, but is not intended to limit the present invention.
Embodiment 1
Ensure that reaction kettle cleans, 420g deionized water is added thereto, starts stirring, addition 116g be (aqueous 7.5%)
Starch is configured to starch milk.Unlatching is heated to 50 DEG C, and the sodium hydrate aqueous solution of sodium peroxydisulfate 2.14g and 32% is added
26.8g, insulation reaction 1h.It is warming up to 55 DEG C later, the chloro- 2- hydroxypropyl of 3--trimethyl ammonium chloride (CTA) 10g is added, continues anti-
Answer 2h.It is adjusted to acidity with 50% sulfuric acid after cooling, discharging obtains modified starch solution.
50g modified starch solution, 60g water, 100g acrylamide, 1.5g methacryloxypropyl second are added into four-hole boiling flask
Base trimethyl ammonium chloride (DMC) and 1gDTPA stirring and dissolving are uniformly mixed.Bottom material is heated to 80 DEG C, is added with stirring 2g mistake
Sodium sulphate.Insulation reaction 3h terminates reaction, with sulphur acid for adjusting pH to acidity after cooling, discharges through 200 mesh net filtrations, is produced
Product.
Embodiment 2
Ensure that reaction kettle cleans, 420g deionized water is added thereto, starts stirring, addition 116g be (aqueous 7.5%)
Carboxymethyl chitosan is configured to solution.Unlatching is heated to 70 DEG C, and the sodium hydroxide of sodium peroxydisulfate 2.14g and 32% is added
Aqueous solution 31.25g, insulation reaction 2h.It is warming up to 90 DEG C later, the chloro- 2- hydroxypropyl of 3--trimethyl ammonium chloride (CTA) is added
20g, the reaction was continued 3h.It is adjusted to acidity with 50% sulfuric acid after cooling, discharging obtains modified carboxy methyl chitosan solution.
Into four-hole boiling flask be added 50g modified carboxy methyl chitosan solution, 60g water, 100g acrylamide, 1.5gDMC and
1g NTA stirring and dissolving is uniformly mixed.Bottom material is heated to 85 DEG C, is added with stirring 2g sodium peroxydisulfate.Insulation reaction 4h is terminated
Reaction discharges through 200 mesh net filtrations with sulphur acid for adjusting pH to acidity after cooling, obtains product.
Embodiment 3
Ensure that reaction kettle cleans, 420g deionized water is added thereto, start stirring, 100g hemicellulose is added, prepares
At suspension.Unlatching is heated to 60 DEG C, and the hemicellulase of 0.5g is added, and reacts 1h, is warming up to 90 DEG C, and persulfuric acid is added
The chloro- 2- hydroxypropyl of ammonium 8.58g and 3--triethyl ammonium chloride (GTA) 30g the reaction was continued 1h.It is adjusted after cooling with 50% sulfuric acid
To acidity, discharging obtains modified hemicellulose solution.
Be added the modified hemicellulose solution of 100g into four-hole boiling flask, 60g water, 100g Methacrylamide, 2gDMC and
1gEDTA stirring and dissolving is uniformly mixed.Bottom material is heated to 85 DEG C, is added with stirring 2g sodium peroxydisulfate.Insulation reaction 4h is terminated
Reaction discharges through 200 mesh net filtrations with sulphur acid for adjusting pH to acidity after cooling, obtains product.
Embodiment 4
Ensure that reaction kettle cleans, 420g deionized water is added thereto, start stirring, 50g maltodextrin is added and 50g is more
Xylan is configured to solution.Unlatching is heated to 50 DEG C, and the sodium hydrate aqueous solution of ammonium persulfate 5.35g and 32% is added
26.8g, insulation reaction 1h.It is warming up to 60 DEG C later, dodecyl dimethyl glycidyl ammonium chloride 20g is added, the reaction was continued
2h.It is adjusted to acidity with 50% sulfuric acid after cooling, discharging obtains MODIFIED POLYSACCHARIDE mixed liquor.
50g MODIFIED POLYSACCHARIDE mixed liquor is added into four-hole boiling flask, 60g water, 100g acrylamide, 1gDMC and 2gEDTA are stirred
Dissolution is mixed to be uniformly mixed.Bottom material is heated to 80 DEG C, is added with stirring 2g ammonium persulfate.Insulation reaction 3h terminates reaction, drop
Wen Houyong sulphur acid for adjusting pH discharges through 200 mesh net filtrations to acidity, obtains product.
Embodiment 5
Ensure that reaction kettle cleans, 420g deionized water is added thereto, start stirring, 30g hemicellulose and 70g hydroxyl is added
Ethyl chitosan is configured to suspension.Unlatching is heated to 60 DEG C, and the hemicellulase of 0.5g is added, and reacts 1h, is warming up to
90 DEG C, the chloro- 2- hydroxypropyl of ammonium persulfate 8.58g and 3--triethyl ammonium chloride (GTA) 30g the reaction was continued 1h is added.It is used after cooling
50% sulfuric acid is adjusted to acidity, and discharging obtains MODIFIED POLYSACCHARIDE mixed liquor.
Into four-hole boiling flask be added 100g MODIFIED POLYSACCHARIDE mixed liquor, 60g water, 100g Methacrylamide, 2gDMC and
1gEDTA stirring and dissolving is uniformly mixed.Bottom material is heated to 85 DEG C, is added with stirring 2g sodium peroxydisulfate.Insulation reaction 4h is terminated
Reaction discharges through 200 mesh net filtrations with sulphur acid for adjusting pH to acidity after cooling, obtains product.
Comparative example
By 1gEDTA, 0.5g sodium peroxydisulfate, 100g parts of acrylamide, 1.5gDMC and 200g deionized water, which is added, reacts
In kettle, unlatching is uniformly mixed, and unlatching is heated to 85 DEG C, starts to react, and thermotonus 3h is maintained to terminate reaction, cooling
Afterwards with sulphur acid for adjusting pH to acidity, discharges through 200 mesh net filtrations, obtain product.
The basic index of each embodiment and comparative example is as shown in table 1:
1 product performance index of table
| Sample number into spectrum | Solid content/% | Viscosity/mPa.s | pH | Appearance |
| Embodiment 1 | 20.02 | 9800 | 3.89 | Pale yellow transparent thick liquid |
| Embodiment 2 | 19.98 | 9600 | 4.12 | Pale yellow transparent thick liquid |
| Embodiment 3 | 19.92 | 9950 | 3.99 | Pale yellow transparent thick liquid |
| Embodiment 4 | 20.05 | 9750 | 4.05 | Pale yellow transparent thick liquid |
| Embodiment 5 | 20.09 | 9850 | 4.10 | Pale yellow transparent thick liquid |
| Comparative example | 20.01 | 10500 | 4.08 | Colorless and transparent viscous solution |
Note: measurement when viscosity is 25 DEG C.
Application Example
The drying strengthening agent of each embodiment and comparative example is taken to carry out following application experiment:
Drying strengthening agent is diluted with water spare to 1%, gets out paper pulp, the drying strengthening agent diluted is added into paper pulp, is added
Dosage 8kg/t.Paper pulp is stirred evenly, handsheet, every strength test is carried out after drying.The result is shown in shown in table 2:
Table 2 adds the handsheet pattern index of each drying strengthening agent sample
It is seen by the Comparison study result with comparative example: using drying strengthening agent prepared by the present invention when additive amount is 8kg/t,
Ring crush intensity, bursting strength, the folding number of paper are significantly better than that contrast sample, and drying strengthening agent prepared by the present invention to environment more
Add close friend, it is seen that the present invention has apparent advantage compared to traditional drying strengthening agent.
The above shows and describes the basic principle, main features and advantages of the invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The scope of protection of present invention by appended claims and
Its equivalent thereof.
Claims (10)
1. a kind of preparation method of the modified drying strengthening agent of polysaccharose substance that performance is controllable, which comprises the steps of: step
Rapid one, modifying agent is added in polysaccharose substance and cationic etherifying agent prepares MODIFIED POLYSACCHARIDE；Step 2, by the MODIFIED POLYSACCHARIDE
It is mixed with acrylamide monomers, initiator, complexing agent and water and carries out Raolical polymerizable and obtain the polysaccharose substance and change
Property drying strengthening agent.
2. the method as described in right wants 1, which is characterized in that the polysaccharose substance is selected from starch, glucose, fructose, malt
Sugar, soluble polysaccharide, dextrin, hydroxyethyl chitosan, carboxymethyl chitosan, carboxymethyl cellulose, guar gum, cellulose, half fiber
At least one of dimension element, polyxylan and its derivative.
3. the method as described in right wants 1, which is characterized in that the preparation method of the MODIFIED POLYSACCHARIDE, including the following steps: will be more
Glucide is configured to suspension or solution, and modifying agent is added and is reacted, and cationic etherifying agent, preparation cation is then added
Change MODIFIED POLYSACCHARIDE, the MODIFIED POLYSACCHARIDE mixed liquor is obtained after reaction；The modifying agent includes in alkaline matter, enzyme and oxidant
At least two.
4. the method as described in right wants 3, which is characterized in that the concentration of the suspension or solution is 15-30wt%, and addition changes
Property agent after be heated to 30-110 DEG C of reaction 0.5-2h, then adjust temperature to 40-90 DEG C, be added cationic etherifying agent, preparation sun
Ionize MODIFIED POLYSACCHARIDE.
5. the method as described in right wants 3, which is characterized in that the alkaline matter be selected from sodium hydroxide, potassium hydroxide, ammonium hydroxide,
At least one of sodium carbonate, potassium carbonate, ammonium hydroxide, organic amine；The enzyme is selected from alpha-amylase, beta amylase, gamma amylase, different
At least one of amylase, cellulase, hemicellulase；The oxidant is selected from sodium peroxydisulfate, potassium peroxydisulfate, persulfuric acid
At least one of ammonium, hydrogen peroxide, sodium hypochlorite.
6. the method as described in right wants 3, which is characterized in that the dosage of the alkaline matter is the polysaccharose substance weight
6-10%；The dosage of the enzyme is the 0.3-0.7% of the polysaccharose substance weight；The dosage of the oxidant is the polysaccharide
The 2-10% of substance weight.
7. the method as described in right wants 3, which is characterized in that in the preparation step of the MODIFIED POLYSACCHARIDE, the degradation of enzyme is added
Temperature is 50-85 DEG C, and the reaction temperature after oxidant is added is 50-90 DEG C.
8. the method as described in right wants 1, which is characterized in that the cationic etherifying agent is selected from the chloro- 2- hydroxypropyl-trimethyl of 3-
Ammonium chloride, 2,3- epoxypropyltrimethylchloride chloride, the chloro- 2- hydroxypropyl-triethyl ammonium chloride of 3-, dodecyl dimethyl epoxy
At least one of propyl ammonium chloride, dosage are the 8-40% of the polysaccharose substance weight.
9. the method as described in claim 1, which is characterized in that in the Raolical polymerizable of step 2, the weight of each component
It is as follows to measure number:
10. the method as described in claim 1, which is characterized in that the acrylamide monomers are selected from acrylamide, methyl-prop
Acrylamide, N- isobutyl group acrylamide, N tert butyl acrylamide, N phenyl acrylamide, acrylonitrile, acrylic acid, fumaric acid,
At least one of itaconic acid, maleic anhydride, methacrylonitrile, cation acrylamide class monomer；The complexing agent is selected from ammonia
Triacetic acid sodium, edetate, diethylenetriamine pentacarboxylic acid salt, tartaric acid, heptose hydrochlorate, sodium gluconate, alginic acid
Sodium, ethylenediamine tetraacetic methene sodium phosphate, diethylene triamine pentamethylene phosphonic salt, the phosphatic at least one of three methene of amine；It is described to draw
It sends out agent and is selected from ammonium persulfate, potassium peroxydisulfate, sodium peroxydisulfate, hydrogen peroxide, tert-butyl hydroperoxide, cyclohexanone peroxide, peroxide
Change at least one of benzoyl, azo-initiator, SODIUM PERCARBONATE, potassium percarbonate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112695565A (en) * | 2020-12-24 | 2021-04-23 | 上海东升新材料有限公司 | Preparation method of natural environment-friendly wet strength agent |
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| CN103408701A (en) * | 2013-07-09 | 2013-11-27 | 上海东升新材料有限公司 | Method for preparing dry strength agent by ultraviolet-initiated polymerization |
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| CN107141409A (en) * | 2017-06-01 | 2017-09-08 | 广东省造纸研究所 | A kind of preparation method of paper strengthening agent |
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| US5543459A (en) * | 1991-08-22 | 1996-08-06 | Basf Aktiengesellschaft | Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use |
| CN102558446A (en) * | 2011-12-31 | 2012-07-11 | 上海东升新材料有限公司 | Dry strength agent and preparation method and application thereof |
| CN103408701A (en) * | 2013-07-09 | 2013-11-27 | 上海东升新材料有限公司 | Method for preparing dry strength agent by ultraviolet-initiated polymerization |
| CN104672385A (en) * | 2015-02-02 | 2015-06-03 | 天津市浩宇助剂有限公司 | Preparation technology of ambipolar dry strength agent |
| CN107141409A (en) * | 2017-06-01 | 2017-09-08 | 广东省造纸研究所 | A kind of preparation method of paper strengthening agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112695565A (en) * | 2020-12-24 | 2021-04-23 | 上海东升新材料有限公司 | Preparation method of natural environment-friendly wet strength agent |
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