CN114456362A - Modifier for preparing multi-branched polymer biological latex and preparation method thereof - Google Patents
Modifier for preparing multi-branched polymer biological latex and preparation method thereof Download PDFInfo
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- CN114456362A CN114456362A CN202210147979.XA CN202210147979A CN114456362A CN 114456362 A CN114456362 A CN 114456362A CN 202210147979 A CN202210147979 A CN 202210147979A CN 114456362 A CN114456362 A CN 114456362A
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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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/685—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen
- C08G63/6854—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen derived from polycarboxylic acids and polyhydroxy compounds
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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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/91—Polymers modified by chemical after-treatment
- C08G63/914—Polymers modified by chemical after-treatment derived from polycarboxylic acids and polyhydroxy compounds
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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
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/44—Polyester-amides
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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
- 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
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- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/28—Polyesters
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- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/30—Polyamides; Polyimides
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Epoxy Resins (AREA)
Abstract
The invention discloses a modifier for preparing multi-branched polymer biological latex and a preparation method thereof, wherein the modifier is prepared from polyalcohol, polyamine, polybasic acid, an esterification catalyst, a polycondensation catalyst, trimethyl phosphate and epoxy chloropropane, and the preparation method comprises the following steps: (1) mixing polybasic acid, polyol and polyamine, adding an esterification catalyst to perform esterification reaction, then adding a polycondensation catalyst and trimethyl phosphate to perform polycondensation reaction, and cooling to obtain a water-soluble polycondensate; (2) diluting the water-soluble polycondensate by adding a certain amount of water, heating to 30-60 ℃, dropwise adding epoxy chloropropane, reacting for 3-6h, keeping the temperature for reacting for 1-2h, cooling to below 30 ℃, adjusting the pH value to 6-8, and filtering to obtain the modifier. The invention can effectively improve the film forming and bonding strength of the biological latex, improve the aging performance of the biological latex and improve the application effect of the biological latex in preparing the coating.
Description
Technical Field
The invention relates to the technical field of papermaking coatings, in particular to a modifier for preparing multi-branched polymer biological latex and a preparation method thereof.
Background
The biological latex is an adhesive prepared by modifying starch serving as a main raw material, is derived from renewable resources, and is an environment-friendly product. In the papermaking coating, the biological latex is used for replacing styrene-butadiene latex, so that the water retention of the coating and the air permeability of finished paper can be improved. However, as the specific gravity of the biological latex replacing the styrene-butadiene latex is gradually increased, the viscosity of the coating is gradually reduced, the water loss value is gradually increased, and indexes such as the strength of the coated paper and the like are gradually reduced.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a modifier for preparing multi-branched polymer biological latex and a preparation method thereof, which can effectively improve the film forming and bonding strength of the biological latex, improve the aging performance of the biological latex and improve the application effect of the biological latex in preparing a coating.
In order to achieve the above purpose, one of the technical schemes adopted by the invention is as follows: a modifier for preparing multi-branched polymer biological latex is prepared by adopting polyalcohol, polyamine, polybasic acid, an esterification catalyst, a polycondensation catalyst, trimethyl phosphate and epoxy chloropropane, and the preparation method comprises the following steps:
(1) mixing polybasic acid, polyhydric alcohol and polyamine, adding an esterification catalyst for esterification, then adding a polycondensation catalyst and trimethyl phosphate for polycondensation, and cooling to obtain a water-soluble polycondensate;
(2) diluting the water-soluble condensation polymer by adding a certain amount of water, heating to 30-60 ℃, dropwise adding epoxy chloropropane, reacting for 3-6h, continuing to react for 1-2h while keeping the temperature, cooling to below 30 ℃, adjusting the pH to 6-8, and filtering to obtain the modifier.
Further, the polybasic acid is prepared by compounding low molecular acid and low molecular weight itaconic acid-acrylic acid polymer resin.
The itaconic acid-acrylic acid polymer resin with low molecular weight is introduced into the polybasic acid, so that the molecular chain structure of the product can be enriched, the branched chain quantity of the whole product can be increased, and meanwhile, the introduction of the itaconic acid-acrylic acid polymer can also increase the dispersing performance of the product on starch, and improve the problems of product aging and excessive rise of low-temperature crystallization viscosity.
In the polybasic acid, the molar mass ratio of the low molecular acid to the low molecular weight itaconic acid-acrylic acid polymer resin is 1: 0.1-0.4.
Further, the low molecular acid comprises at least one of adipic acid, oxalic acid, tartaric acid and citric acid.
Further, the polyhydric alcohol includes at least one of glycerin, propylene glycol, sorbitol, polypropylene glycol, and polyethylene glycol.
Further, the polyamine includes at least one of diethylenetriamine and triethylenetetramine.
Further, the molar mass ratio of the polybasic acid, the polyhydric alcohol, the polyamine, the esterification catalyst, the polycondensation catalyst and the trimethyl phosphate is as follows: 1:1.4-1.7:0.2-0.4:0.0002-0.0004:0.00003-0.00006:0.0003-0.0005.
Further, the charging amount of the epichlorohydrin is 30-60% of that of the polyamine by the molar mass.
Further, the molecular weight of the water-soluble polycondensate was 2000-10000.
The second technical scheme adopted by the invention is as follows: a preparation method of a modifier for preparing multi-branched polymer biological latex comprises the following steps:
(1) mixing polybasic acid, polyhydric alcohol and polyamine, adding an esterification catalyst, heating to 180 ℃ for 220 ℃ within 2-4h, carrying out esterification reaction for 1.5-2.5h, adding a polycondensation catalyst and trimethyl phosphate, heating to 210 ℃ for 230 ℃, carrying out polycondensation reaction for 1-2h, and cooling to obtain a water-soluble polycondensate;
(2) adding a certain amount of water into the water-soluble polycondensate to dilute the water-soluble polycondensate to a concentration of 40-60%, then heating to 30-60 ℃, dropwise adding a certain amount of epichlorohydrin, reacting for 3-6h dropwise, continuing to perform heat preservation reaction for 1-2h, cooling to below 30 ℃, adjusting the pH to 6-8, and filtering to obtain the modifier.
The invention has the beneficial effects that:
introducing polyamine in esterification reaction of polybasic acid and polyalcohol to form esterified substance with amino group, then polycondensing under the action of polycondensation catalyst and stabilizer trimethyl phosphate to form water-soluble polycondensate, introducing epichlorohydrin and amino group to make cross-linking reaction and produce cationic epichlorohydrin reaction group, in which the structural formula of said cationic epichlorohydrin reaction group is as follows:
when the modifier is used for modifying starch to prepare biological latex, the structure of the multi-branched polyol and the polyacid and the action of the epichlorohydrin reaction group can improve the dispersing performance of the starch, effectively improve the plasticity of the starch, improve the film forming and bonding strength of the prepared biological latex, improve the aging performance and the storage stability of the biological latex and further improve the application effect of the biological latex in subsequent coating.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.
The invention relates to a modifier for preparing multi-branched polymer biological latex, which is prepared from polyalcohol, polyamine, polybasic acid, zinc acetate, antimony acetate, trimethyl phosphate and epichlorohydrin, and the preparation method comprises the following steps:
(1) mixing polybasic acid, polyhydric alcohol and polyamine, adding zinc acetate, heating to 180 ℃ for 220 ℃ within 2-4h, carrying out esterification reaction for 1.5-2.5h, adding antimony acetate and trimethyl phosphate, heating to 210 ℃ for 230 ℃ for polycondensation reaction for 1-2h, and cooling to obtain a water-soluble polycondensate;
(2) adding a certain amount of water into the water-soluble polycondensate to dilute the water-soluble polycondensate to a concentration of 40-60%, then heating to 30-60 ℃, dropwise adding epoxy chloropropane, reacting for 3-6h, continuing to perform heat preservation reaction for 1-2h, cooling to below 30 ℃, adjusting the pH to 6-8, and filtering by a 200-mesh sieve to obtain the modifier.
Wherein the molar mass ratio of the polybasic acid to the polyhydric alcohol to the polyamine to the zinc acetate to the antimony acetate to the trimethyl phosphate is as follows: 1:1.4-1.7:0.2-0.4:0.0002-0.0004:0.00003-0.00006:0.0003-0.0005.
Specifically, the polybasic acid is prepared by compounding low molecular acid and low molecular weight itaconic acid-acrylic acid polymer resin. The low molecular acid comprises at least one of adipic acid, oxalic acid, tartaric acid and citric acid. The polyhydric alcohol comprises at least one of glycerol, propylene glycol, sorbitol, polypropylene glycol, and polyethylene glycol. The polyamine comprises at least one of diethylenetriamine and triethylene tetramine.
The itaconic acid-acrylic acid polymer resin with low molecular weight is introduced into the polybasic acid, so that the molecular chain structure of the product can be enriched, the branched chain quantity of the whole product can be increased, meanwhile, the itaconic acid-acrylic acid polymer resin with low molecular weight can also increase the dispersing performance of the product on starch, and the problems of product aging and excessive rise of low-temperature crystallization viscosity can be solved.
Further, in the polybasic acid, the molar ratio of the low molecular acid to the low molecular weight itaconic acid-acrylic acid polymer resin is 1: 0.1-0.4.
In the step (1), the molecular weight of the water-soluble polycondensate is 2000-10000, and in the step (2), the charging amount of the epichlorohydrin is 30-60% of the charging amount of the polyamine.
The invention relates to a preparation method of a modifier for preparing multi-branched polymer biological latex, which comprises the following steps:
(1) mixing polybasic acid, polyhydric alcohol and polyamine, adding zinc acetate, heating to 180 ℃ for 220 ℃ within 2-4h, carrying out esterification reaction for 1.5-2.5h, adding antimony acetate and trimethyl phosphate, heating to 210 ℃ for 230 ℃, carrying out polycondensation reaction for 1-2h, and cooling to obtain a water-soluble polycondensate;
(2) adding a certain amount of water into the water-soluble polycondensate to dilute the water-soluble polycondensate to a concentration of 40-60%, then heating to 30-60 ℃, dropwise adding a certain amount of epichlorohydrin, reacting for 3-6h dropwise, continuing to perform heat preservation reaction for 1-2h, cooling to below 30 ℃, adjusting the pH to 6-8, and filtering by a 200-mesh sieve to obtain the modifier.
In the step (1), zinc acetate is used as an esterification catalyst, polyamine is introduced in the esterification reaction of polybasic acid and polyalcohol to form an esterified substance with amino, and then the esterified substance is polycondensed under the action of a polycondensation catalyst antimony acetate and a stabilizer trimethyl phosphate to form a water-soluble polycondensate; in the step (2), epichlorohydrin is introduced to perform a crosslinking reaction with an amino group, and a cationic epichlorohydrin-reactive group is generated, and the cationic epichlorohydrin-reactive group has the following structural formula:
when the modifier is used for modifying starch to prepare biological latex, the structure of the multi-branched polyol and the polyacid and the action of the epichlorohydrin reaction group can improve the dispersing performance of the starch, effectively improve the plasticity of the starch, improve the film forming and bonding strength of the prepared biological latex, improve the aging performance and the storage stability of the biological latex and further improve the application effect of the biological latex in subsequent coating.
Example 1: preparation of sample 1
(1) Adding 0.5mol of polybasic acid (calculated according to the content of carboxyl, comprising 0.21mol of adipic acid, 0.06mol of oxalic acid, 0.1mol of tartaric acid and 0.13mol of low molecular weight itaconic acid-acrylic acid polymer resin) and 0.8mol of polyol (calculated according to the content of hydroxyl, comprising 0.42mol of glycerol, 0.28mol of polyethylene glycol and 0.1mol of sorbitol) and 0.2mol of polyamine (calculated according to the content of amino, comprising 0.2mol of diethylenetriamine), adding 0.0001mol of zinc acetate, heating to 220 ℃ within 2h, carrying out esterification reaction for 1.5h, then adding 0.00002mol of antimony acetate as a polycondensation catalyst and 0.0002mol of trimethyl phosphate as a stabilizer, adjusting the temperature to 210 ℃, carrying out reaction for 1.5h, and cooling to obtain a water-soluble polycondensate;
(2) adding a certain amount of water into the water-soluble polycondensate to dilute the polycondensate to a concentration of 50%, then heating to 30 ℃, dropwise adding 0.06mol of epoxy chloropropane, dropwise adding the epoxy chloropropane for reacting for 6 hours, continuing to perform heat preservation reaction for 2 hours, cooling to below 30 ℃, adjusting the pH value to 6.3, and filtering by a 200-mesh sieve to obtain a sample 1.
Example 2: preparation of sample 2
(1) Adding 0.5mol of polybasic acid (calculated according to carboxyl content, comprising 0.24mol of oxalic acid, 0.07mol of tartaric acid, 0.13mol of citric acid and 0.06mol of low molecular weight itaconic acid-acrylic acid polymer resin) and 0.7mol of polyol (calculated according to hydroxyl content, comprising 0.18mol of glycerol, 0.33mol of propylene glycol and 0.19mol of polypropylene glycol) and 0.1mol of polyamine (calculated according to amino content, comprising 0.1mol of diethylenetriamine), adding 0.0002mol of zinc acetate, heating to 210 ℃ within 4h, carrying out esterification reaction for 2.5h, then adding 0.000015mol of antimony acetate as a polycondensation catalyst and 0.00025mol of trimethyl phosphate as a stabilizer, adjusting the temperature to 220 ℃, carrying out reaction for 1h, and cooling to obtain a water-soluble polycondensate;
(2) adding a certain amount of water into the water-soluble polycondensate to dilute the polycondensate to a concentration of 50%, then heating to 60 ℃, dropwise adding 0.05mol of epoxy chloropropane, dropwise adding the epoxy chloropropane for reacting for 4 hours, continuing to perform heat preservation reaction for 1.5 hours, cooling to below 30 ℃, adjusting the pH value to 7.1, and filtering by a 200-mesh sieve to obtain a sample 2.
Example 3: preparation of sample 3
(1) Adding 0.5mol of polybasic acid (calculated according to carboxyl content, including 0.19mol of adipic acid, 0.08mol of oxalic acid, 0.065mol of citric acid, 0.075mol of tartaric acid and 0.09mol of low molecular weight itaconic acid-acrylic acid polymer resin) and 0.85mol of polyol (calculated according to hydroxyl content, including 0.17mol of glycerol, 0.35mol of propylene glycol, 0.27mol of sorbitol, 0.06mol of polyethylene glycol) and 0.15mol of polyamine (calculated according to amino content, including 0.15mol of diethylenetriamine), adding 0.00015mol of zinc acetate, heating to 180 ℃ within 3h, carrying out esterification for 2h, then adding 0.00003mol of antimony acetate as a polycondensation catalyst and 0.00015mol of trimethyl phosphate as a stabilizer, adjusting the temperature to 230 ℃, carrying out reaction for 2h, and cooling to obtain a water-soluble polycondensate;
(2) adding a certain amount of water into the water-soluble polycondensate to dilute the polycondensate to a concentration of 50%, then heating to 45 ℃, dropwise adding 0.09mol of epoxy chloropropane, dropwise adding the epoxy chloropropane for reacting for 3 hours, continuing to perform heat preservation reaction for 1 hour, cooling to below 30 ℃, adjusting the pH value to 7.9, and filtering by a 200-mesh sieve to obtain a sample 3.
Application example
Biological latexes were prepared using sample 1, sample 2, and sample 3, respectively, by the following method: adding 274.6g of tap water into a reaction vessel, starting stirring, adding 225.4g of cassava native starch, and continuously adding 0.029g of medium-temperature amylase which is about 150ppm relative to the absolutely dry starch to prepare a starch aqueous solution; heating, wherein in the temperature rising process, if the viscosity of the starch solution rises rapidly, the stirring speed can be properly increased, and the temperature rises to 70-80 ℃ and then the enzymolysis reaction is carried out for 20-40min under the condition of heat preservation; after the enzymolysis reaction is finished, heating to more than 95 ℃, and preserving the heat for 20-30min to finish the medium-temperature amylase inactivation; after inactivation is finished, cooling to below 80 ℃; adding 39g of sample 1 (or sample 2 or sample 3), stirring and reacting at 60-80 ℃ for 30min to obtain a biological latex product, preparing a coating, coating paper, and testing the paper forming performance. The components and the parts of the coating are shown in table 1, and the paper performance test result is shown in table 2.
TABLE 1 coating formulation Components and amounts
Table 2 paper property test results
As can be seen from table 2:
1. comparing the test results of C1, C2, C4, and C6, it can be seen that the biological latex (C2, C4, and C6) prepared by using the samples 1, 2, and 3 has slightly improved water retention property of the prepared coating, and the IGT strength, RI wet strength, water resistance, and breaking grade of the finished paper are all significantly improved when replacing the same portion of styrene-butadiene latex as the conventional biological latex (C1) on the market;
2. the test results of comparing C1, C3, C5 and C7 show that the biological latex prepared by using sample 1, sample 2 and sample 3 (C2, C4 and C6) has significantly improved water retention performance of the prepared coating and improved IGT strength, RI wet strength, water resistance and broken powder grade of the finished paper compared with the conventional biological latex (C1) on the market under the condition of replacing a higher part of styrene-butadiene latex.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A modifier for preparing multi-branched polymer biological latex is characterized in that: the modifier is prepared from polyalcohol, polyamine, polybasic acid, an esterification catalyst, a polycondensation catalyst, trimethyl phosphate and epoxy chloropropane, and the preparation method comprises the following steps:
(1) mixing polybasic acid, polyhydric alcohol and polyamine, adding an esterification catalyst for esterification, then adding a polycondensation catalyst and trimethyl phosphate for polycondensation, and cooling to obtain a water-soluble polycondensate;
(2) diluting the water-soluble polycondensate by adding a certain amount of water, heating to 30-60 ℃, dropwise adding epoxy chloropropane, reacting for 3-6h, continuing to react for 1-2h while keeping the temperature, cooling to below 30 ℃, adjusting the pH value to 6-8, and filtering to obtain the modifier.
2. The modifier according to claim 1, characterized in that: the polybasic acid is compounded by low molecular acid and itaconic acid-acrylic acid polymer resin with low molecular weight.
3. The modifier according to claim 2, characterized in that: in the polybasic acid, the molar mass ratio of the low molecular acid to the low molecular weight itaconic acid-acrylic acid polymer resin is 1: 0.1-0.4.
4. The modifier according to claim 2, characterized in that: the low molecular acid comprises at least one of adipic acid, oxalic acid, tartaric acid and citric acid.
5. The modifier according to claim 1, characterized in that: the polyalcohol comprises at least one of glycerol, propylene glycol, sorbitol, polypropylene glycol and polyethylene glycol.
6. The modifier according to claim 1, characterized in that: the polyamine comprises at least one of diethylenetriamine and triethylene tetramine.
7. The modifier according to claim 1, characterized in that: the molar mass ratio of the polybasic acid to the polyhydric alcohol to the polyamine to the esterification catalyst to the polycondensation catalyst to the trimethyl phosphate is as follows: 1:1.4-1.7:0.2-0.4:0.0002-0.0004:0.00003-0.00006:0.0003-0.0005.
8. The modifier according to claim 1, characterized in that: the charging amount of the epichlorohydrin is 30-60% of that of the polyamine by the molar mass.
9. The modifier according to claim 1, characterized in that: the molecular weight of the water-soluble condensation polymer is 2000-10000.
10. A preparation method of a modifier for preparing multi-branched polymer biological latex is characterized by comprising the following steps: the method comprises the following steps:
(1) mixing polybasic acid, polyhydric alcohol and polyamine, adding an esterification catalyst, heating to 180 ℃ for 220 ℃ within 2-4h, carrying out esterification reaction for 1.5-2.5h, adding a polycondensation catalyst and trimethyl phosphate, heating to 210 ℃ for 230 ℃, carrying out polycondensation reaction for 1-2h, and cooling to obtain a water-soluble polycondensate;
(2) adding a certain amount of water into the water-soluble polycondensate to dilute the water-soluble polycondensate to a concentration of 40-60%, then heating to 30-60 ℃, dropwise adding a certain amount of epichlorohydrin, reacting for 3-6h, continuing to perform heat preservation reaction for 1-2h, cooling to below 30 ℃, adjusting the pH value to 6-8, and filtering to obtain the modifier.
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| US2926116A (en) * | 1957-09-05 | 1960-02-23 | Hercules Powder Co Ltd | Wet-strength paper and method of making same |
| JP2011256342A (en) * | 2010-06-11 | 2011-12-22 | Taoka Chem Co Ltd | Method for producing polycondensation product of aliphatic dicarboxylic acid, polyalkylene polyamine and 2,3-epoxy sulfonate |
| CN104710579A (en) * | 2015-03-19 | 2015-06-17 | 九洲生物技术（苏州）有限公司 | Wet strength agent, and preparation method and application of wet strength agent |
| CN111100289A (en) * | 2019-12-30 | 2020-05-05 | 上海东升新材料有限公司 | Branched-chain type wet strength agent and synthesis method thereof |
-
2022
- 2022-02-17 CN CN202210147979.XA patent/CN114456362A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2926116A (en) * | 1957-09-05 | 1960-02-23 | Hercules Powder Co Ltd | Wet-strength paper and method of making same |
| JP2011256342A (en) * | 2010-06-11 | 2011-12-22 | Taoka Chem Co Ltd | Method for producing polycondensation product of aliphatic dicarboxylic acid, polyalkylene polyamine and 2,3-epoxy sulfonate |
| CN104710579A (en) * | 2015-03-19 | 2015-06-17 | 九洲生物技术（苏州）有限公司 | Wet strength agent, and preparation method and application of wet strength agent |
| CN111100289A (en) * | 2019-12-30 | 2020-05-05 | 上海东升新材料有限公司 | Branched-chain type wet strength agent and synthesis method thereof |
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