CN113174035B - Multifunctional water-soluble polyester slurry - Google Patents
Multifunctional water-soluble polyester slurry Download PDFInfo
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- CN113174035B CN113174035B CN202110500316.7A CN202110500316A CN113174035B CN 113174035 B CN113174035 B CN 113174035B CN 202110500316 A CN202110500316 A CN 202110500316A CN 113174035 B CN113174035 B CN 113174035B
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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
- C08G63/688—Polyesters containing atoms other than carbon, hydrogen and oxygen containing sulfur
- C08G63/6884—Polyesters containing atoms other than carbon, hydrogen and oxygen containing sulfur derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/6886—Dicarboxylic acids and dihydroxy 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
- C08G63/78—Preparation processes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
- D06M13/248—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing sulfur
- D06M13/252—Mercaptans, thiophenols, sulfides or polysulfides, e.g. mercapto acetic acid; Sulfonium compounds
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
- D06M13/282—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing phosphorus
- D06M13/292—Mono-, di- or triesters of phosphoric or phosphorous acids; Salts thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/507—Polyesters
- D06M15/5075—Polyesters containing sulfonic groups
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/40—Reduced friction resistance, lubricant properties; Sizing compositions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
The invention relates to the technical field of polyester slurry, and discloses multifunctional water-soluble polyester slurry which is prepared from the following raw materials in parts by weight, wherein 100 parts of recycled polyester are contained; 6-8 parts of 2-methyl-1, 3-propanediol or 2, 2-dimethyl-1, 3-propanediol; 12-18 parts of isophthalic acid-5-sulfonate or a derivative thereof; 4-6 parts of isophthalic acid; 0.05-0.10 part of catalyst; 0.1-0.5 part of an ether inhibitor; 1.0-3.0 parts of adipic acid or polyester polyol; 4.0-6.0 parts of polyethylene glycol 600 or polyether glycol 400; 2.0-5.0 parts of diethylene glycol or ethylene glycol; 2.5-5.0 parts of multifunctional auxiliary agent. The invention has the following advantages and effects: by optimizing the formula and the proportion of the polyester raw materials and adding the assistants such as the ether inhibitor, adipic acid or polyester polyol, polyethylene glycol 600 or polyether glycol 400, diethylene glycol or ethylene glycol, multifunctional assistant and the like, the water solubility of the polyester slurry can be improved, and the effects of quick desizing and high temperature resistance can be achieved.
Description
Technical Field
The invention relates to the technical field of polyester slurry, in particular to multifunctional water-soluble polyester slurry.
Background
The technical performance of the water jet loom brings better economy, and the water jet loom as a high-speed shuttleless loom shows vigorous vitality in the modern textile industry. Meanwhile, the development of the size of the water-jet loom is promoted, and the size of the water-jet loom is different from the conventional size and meets the following characteristics: the size mixing is easy to dissolve in water, the size film is waterproof during weaving, and the size is easy to remove during desizing.
At present, the water-soluble polyester slurry is prepared by two process routes of direct esterification (PTA, PTA refers to fine terephthalic acid) or ester exchange (DMT refers to dimethyl terephthalate) by taking terephthalic acid and ethylene glycol as two main components, taking isophthalic acid-5-sulfonate or dihydroxy ethyl isophthalate-5-sulfonate as a third component and polyethylene glycol (PEG) as a fourth component.
The existing water-soluble polyester slurry has the following defects: 1) The polyester slurry is thickened by ammonia water, the weaving requirement of water resistance can be made by utilizing the characteristic that ammonia is volatile at high temperature, when desizing is carried out, alkali liquor is used for boiling and refining, a size film is changed into water-soluble acrylate, so that desizing is completed, but the size film is difficult to completely dissolve, and the generated desizing waste is difficult to biodegrade; 2) The polymerization process of the polyester slurry is usually accompanied with etherification reaction, and the generated by-products can cause the glass temperature of the polyester slurry to be reduced, improve the moisture absorption, not only be unfavorable for the manufacture of short fibers, but also reduce the high temperature resistance of products. Therefore, the formula of the water-soluble polyester slurry needs to be improved urgently, and the effects of quick desizing and high temperature resistance are realized on the premise of ensuring the water solubility of the polyester slurry.
Disclosure of Invention
The invention aims to provide multifunctional water-soluble polyester slurry which has the effects of quick desizing and high temperature resistance.
The technical purpose of the invention is realized by the following technical scheme:
the multifunctional water-soluble polyester slurry is prepared from the following raw materials in parts by weight, wherein 100 parts of recycled polyester; 6-8 parts of 2-methyl-1, 3-propanediol or 2, 2-dimethyl-1, 3-propanediol; 12-18 parts of isophthalic acid-5-sulfonate or a derivative thereof; 4-6 parts of isophthalic acid; 0.05-0.10 part of catalyst; 0.1-0.5 part of an ether inhibitor; 1.0-3.0 parts of adipic acid or polyester polyol; 4.0-6.0 parts of polyethylene glycol 600 or polyether glycol 400; 2.0-5.0 parts of diethylene glycol or ethylene glycol; 2.5-5.0 parts of multifunctional additive.
By adopting the technical scheme, in the actual production process, polyester, 2-methyl-1, 3-propanediol or 2, 2-dimethyl-1, 3-propanediol, isophthalic acid-5-sulfonate or derivatives thereof, isophthalic acid and a catalyst are recycled as raw materials for producing polyester, and the main components of polyester slurry are generated by a chemical method; wherein, the 2-methyl-1, 3-propanediol or 2, 2-dimethyl-1, 3-propanediol is used as a comonomer to participate in the reaction and is also used as an organic solvent to promote the mixing of the raw materials, thereby preliminarily improving the solubility of the polyester slurry; on the basis, the etherification reaction in the preparation process is inhibited by adding the ether inhibitor, and the generation of byproducts is reduced, so that the glass transition temperature of the polyester slurry is increased, the moisture absorption is reduced, and the high temperature resistance of the polyester slurry is improved; meanwhile, isophthalic acid-5-sulfonate or derivatives thereof, adipic acid or polyester polyol, polyethylene glycol 600 or polyether glycol 400 can increase the water solubility of the polyester slurry, and the proportion of diethylene glycol or ethylene glycol is controlled in the polymerization process, so that the hydrophilicity of the polyester slurry is enhanced, and the physical and chemical properties of the polyester slurry are improved by the aid of a multifunctional auxiliary agent, so that the aim of rapid desizing is fulfilled; in the process, the water solubility of the polyester slurry can be improved by optimizing the formula ratio of the polyester raw materials and adding the ether inhibitor, adipic acid or polyester polyol, polyethylene glycol 600 or polyether glycol 400, diethylene glycol or ethylene glycol, multifunctional auxiliary agent and other auxiliary agents, and the effects of quick desizing and high temperature resistance are achieved.
Further, the isophthalic acid-5-sulfonate or the derivative thereof is one of isophthalic acid-5-sodium sulfonate, dimethyl isophthalate-5-lithium sulfonate and isophthalic acid-5-lithium ethylene glycol sulfonate.
Further, the catalyst is one of antimony acetate, ethylene glycol antimony, zinc acetate and calcium acetate. By adopting the catalyst, the yield of the polyester can reach more than 95 percent.
Further, the ether inhibitor is one of anhydrous sodium acetate, sodium acetate trihydrate, potassium acetate and lithium acetate. Because the 5-sulfoisophthalate or the derivative thereof is acidic, the addition of the 5-sulfoisophthalate or the derivative thereof can aggravate the self dehydration reaction of polyethylene glycol 600 and the like, and the dehydration reaction in the production can be well inhibited through the ether-preventing agents, so that the content of the diglycol in the polyester slurry can be effectively controlled.
Further, the multifunctional additive comprises the following raw materials in parts by weight, 0.1-1.0 part of antioxidant; 1.0-2.0 parts of cosolvent; 0.8-1.0 part of emulsifier; 0.6-1.0 part of dispersant.
Further, the antioxidant is one of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], tris [2, 4-di-tert-butylphenyl ] phosphite, 2-thiobis (4-methyl-6-tert-butylphenol), and octadecanol [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]. The water-soluble polyester resin has low hardness requirement, and the color of the water-soluble polyester resin is required to be yellowish and transparent or colorless and transparent, but the color of the product is greatly influenced by the polymerization reaction time, so that the components are used as the antioxidant, the polyester slurry can be effectively prevented from being oxidized and yellowed, and the product quality is improved.
Further, the cosolvent is N, N-dimethylacetamide or acetone. The cosolvent can promote the dissolution and mixing of components in the raw materials of the polyester slurry, improve the water solubility of the raw materials and further realize the purpose of quick desizing.
Further, the emulsifier is one of nonylphenol polyether-9, nonylphenol polyether-12, nonylphenol polyoxyethylene ether-10 and nonylphenol polyoxyethylene ether-15. The emulsifying agent can help the polyester sizing agent to emulsify, improve the hydrophilicity and the water solubility, and improve the adhesiveness of the polyester sizing agent so as to adapt to the production of short fibers.
Further, the dispersing agent is one of polyethylene wax, aluminum stearate, calcium stearate and paraffin wax. The components are used as a dispersing agent for practical use, so that the components in the raw materials of the polyester slurry can be uniformly dispersed, and the physical and chemical properties of the polyester slurry are improved.
Further, the concrete implementation mode of preparing the polyester slurry is that,
s1, pulping and mixing the recycled polyester, the dihydric alcohol polymerized monomer, the isophthalic acid or the derivative thereof, the isophthalic acid and the ether inhibitor for 30min at normal temperature and normal pressure to obtain an alcohol hydrolyzed solution;
s2, preheating the alcoholysis liquid obtained in the step S1 to 150 ℃ in advance, adding a catalyst, adipic acid or polyester polyol, polyethylene glycol 600 or polyether glycol 400, and diethylene glycol or ethylene glycol under the stirring condition, statically heating to 255 +/-2 ℃ under normal pressure, and carrying out esterification reaction for 3 hours to obtain an esterification liquid;
s3, heating the esterified liquid obtained in the step S2 to 270 ℃, simultaneously improving the vacuum degree to reach the absolute pressure of below 80Pa, carrying out polymerization reaction for 3 hours, then adding the multifunctional auxiliary agent, and continuously stirring for 10min to obtain a polymer melt;
and S4, stopping stirring and vacuumizing the polymerized melt obtained in the step S3, relieving vacuum of the polymerized melt by using high-purity nitrogen, pressurizing to 0.2MPa, discharging the polymerized melt to cold water with the temperature of less than or equal to 25 ℃, and granulating to obtain the polyester slurry with the particle size of 2.5mm +/-0.5 mm.
The invention has the beneficial effects that: by optimizing the formula ratio of the polyester raw materials and adding the ether inhibitor, adipic acid or polyester polyol, polyethylene glycol 600 or polyether glycol 400, diethylene glycol or ethylene glycol, multifunctional auxiliary agent and other auxiliary agents, the water solubility of the polyester slurry can be improved, and the effects of quick desizing and high temperature resistance can be achieved.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Examples
Example 1: the invention discloses multifunctional water-soluble polyester slurry which is prepared by the following steps,
s1, pulping and mixing the recycled polyester, the dihydric alcohol polymerized monomer, the isophthalic acid or the derivative thereof, the isophthalic acid and the ether inhibitor for 30min at normal temperature and normal pressure to obtain an alcohol hydrolyzed solution;
s2, preheating the alcoholysis liquid obtained in the step S1 to 150 ℃ in advance, adding a catalyst, adipic acid or polyester polyol, polyethylene glycol 600 or polyether glycol 400, and diethylene glycol or ethylene glycol under the stirring condition, statically heating to 255 +/-2 ℃ under normal pressure, and carrying out esterification reaction for 3 hours to obtain an esterification liquid;
s3, heating the esterified liquid obtained in the step S2 to 270 ℃, simultaneously improving the vacuum degree to reach the absolute pressure of below 80Pa, carrying out polymerization reaction for 3 hours, then adding the multifunctional auxiliary agent, and continuously stirring for 10min to obtain a polymer melt;
s4, stopping stirring and vacuumizing operation of the polymerized melt obtained in the step S3, relieving vacuum of the polymerized melt by using high-purity nitrogen, pressurizing to 0.2MPa, discharging the polymerized melt to cold water with the temperature of less than or equal to 25 ℃, and pelletizing to obtain polyester slurry with the particle size of 2.5mm +/-0.5 mm.
In S1, the isophthalic acid-5-sulfonate or the derivative thereof is isophthalic acid-5-sodium sulfonate; the ether inhibitor is anhydrous sodium acetate.
In S2, the catalyst is antimony acetate, and adipic acid, polyethylene glycol 600 and diethylene glycol are preferably used for the esterification reaction.
In S3, the multifunctional auxiliary agent is composed of raw materials containing an antioxidant, a cosolvent, an emulsifier and a dispersant. Wherein the antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester; the cosolvent is N, N-dimethylacetamide; the emulsifier is nonylphenol polyether-9; the dispersing agent is polyethylene wax.
Example 2: the multifunctional water-soluble polyester slurry disclosed by the invention is different from the multifunctional water-soluble polyester slurry disclosed by the embodiment 1 in that the components and the parts by weight thereof in the raw materials are shown in the table 1.
Example 3: the multifunctional water-soluble polyester slurry disclosed by the invention is different from the multifunctional water-soluble polyester slurry disclosed by the embodiment 1 in that the components and the parts by weight thereof in the raw materials are shown in the table 1.
Example 4: the multifunctional water-soluble polyester slurry disclosed by the invention is different from the multifunctional water-soluble polyester slurry disclosed by the embodiment 1 in that the components and the parts by weight thereof in the raw materials are shown in the table 1.
Example 5: the multifunctional water-soluble polyester slurry disclosed by the invention is different from the multifunctional water-soluble polyester slurry disclosed by the embodiment 1 in that the components and the parts by weight thereof in the raw materials are shown in the table 1.
Example 6: the multifunctional water-soluble polyester slurry disclosed by the invention is different from the multifunctional water-soluble polyester slurry disclosed by the embodiment 1 in that the components and the parts by weight thereof in the raw materials are shown in the table 1.
Example 7: the multifunctional water-soluble polyester slurry disclosed by the invention is different from the multifunctional water-soluble polyester slurry disclosed by the embodiment 1 in that the components and the parts by weight thereof in the raw materials are shown in the table 1.
Example 8: the multifunctional water-soluble polyester slurry disclosed by the invention is different from the multifunctional water-soluble polyester slurry disclosed by the embodiment 1 in that the components and the parts by weight thereof in the raw materials are shown in the table 1.
Example 9: the multifunctional water-soluble polyester slurry disclosed by the invention is different from the multifunctional water-soluble polyester slurry disclosed by the embodiment 1 in that the components and the parts by weight thereof in the raw materials are shown in the table 1.
Example 10: the multifunctional water-soluble polyester slurry disclosed by the invention is different from the multifunctional water-soluble polyester slurry disclosed by the embodiment 1 in that the components and the parts by weight thereof in the raw materials are shown in the table 1.
TABLE 1
TABLE 1 continuation
Performance test
The polyester pastes obtained in the examples were divided into 4 groups on average. After supporting the slurry film with the 1 st to 3 rd groups of polyester slurry, dissolving the slurry film in 0.5% sodium hydroxide solution, pure water at 25 ℃ and pure water at 95 ℃ respectively, testing and recording the time T of complete dissolution 1 、T 2 、T 3 . Placing the 4 th group of polyester slurry inAnd (5) steaming and baking the mixture for 2 hours in an oven at the temperature of 60 ℃, and then taking out the mixture and observing the adhesion condition of the product. The test results of the above-described detection tests are shown in table 2.
TABLE 2
As can be seen from table 2, by optimizing the formula ratio of the polyester raw materials and adding the ether inhibitor, adipic acid or polyester polyol, polyethylene glycol 600 or polyether glycol 400, diethylene glycol or ethylene glycol, multifunctional auxiliary agent and other auxiliary agents, the polyester slurry prepared by the formula of the present invention has good water solubility and high temperature resistance, and can achieve the effect of rapid desizing.
Claims (8)
1. The multifunctional water-soluble polyester slurry is characterized in that: is prepared from the following raw materials in part by weight,
recycling 100 parts of polyester;
6-8 parts of 2-methyl-1, 3-propanediol or 2, 2-dimethyl-1, 3-propanediol;
12-18 parts of m-phthalic acid-5-sulfonate or derivative thereof
4-6 parts of isophthalic acid;
0.05-0.10 part of catalyst;
0.1-0.5 part of an ether inhibitor;
1.0-3.0 parts of adipic acid or polyester polyol;
4.0-6.0 parts of polyethylene glycol 600 or polyether glycol;
2.0-5.0 parts of diethylene glycol or ethylene glycol;
2.5-5.0 parts of multifunctional auxiliary agent;
the isophthalic acid-5-sulfonate or the derivative thereof is one of isophthalic acid-5-sodium sulfonate, dimethyl isophthalate-5-lithium sulfonate and isophthalic acid-5-lithium ethylene glycol sulfonate;
the concrete implementation mode is that,
s1, pulping and mixing recycled polyester, a dihydric alcohol polymerization monomer, isophthalic acid or a derivative thereof, isophthalic acid and an ether inhibitor for 30min at normal temperature and normal pressure to obtain an alcohol hydrolyzed solution, wherein the dihydric alcohol aggregate monomer is 2-methyl-1, 3 propanediol or 2, 2-dimethyl-1, 3 propanediol;
s2, preheating the alcoholysis liquid obtained in the step S1 to 150 ℃ in advance, adding a catalyst, adipic acid or polyester polyol, polyethylene glycol 600 or polyether glycol 400, and diethylene glycol or ethylene glycol under the stirring condition, statically heating to 255 +/-2 ℃ under normal pressure, and carrying out esterification reaction for 3 hours to obtain an esterification liquid;
s3, heating the esterified liquid obtained in the step S2 to 270 ℃, simultaneously improving the vacuum degree to reach the absolute pressure of below 80Pa, carrying out polymerization reaction for 3 hours, then adding the multifunctional auxiliary agent, and continuously stirring for 10min to obtain a polymer melt;
and S4, stopping stirring and vacuumizing the polymerized melt obtained in the step S3, relieving vacuum of the polymerized melt by using high-purity nitrogen, pressurizing to 0.2MPa, discharging the polymerized melt to cold water with the temperature of less than or equal to 25 ℃, and granulating to obtain the polyester slurry with the particle size of 2.5mm +/-0.5 mm.
2. The multifunctional water-soluble polyester paste according to claim 1, wherein: the catalyst is one of antimony acetate, ethylene glycol antimony, zinc acetate and calcium acetate.
3. The multifunctional water-soluble polyester slurry according to claim 1, wherein: the ether inhibitor is one of anhydrous sodium acetate, sodium acetate trihydrate, potassium acetate and lithium acetate.
4. The multifunctional water-soluble polyester paste according to claim 1, wherein: the multifunctional auxiliary agent comprises the following raw materials in parts by weight,
0.1-1.0 part of antioxidant;
1.0-2.0 parts of cosolvent;
0.8-1.0 part of emulsifier;
0.6-1.0 part of dispersant.
5. The multifunctional water-soluble polyester slurry according to claim 4, wherein: the antioxidant is one of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], tris [2, 4-di-tert-butylphenyl ] phosphite, 2-thiobis (4-methyl-6-tert-butylphenol) and octadecanol [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].
6. The multifunctional water-soluble polyester paste according to claim 4, wherein: the cosolvent is N, N-dimethylacetamide or acetone.
7. The multifunctional water-soluble polyester slurry according to claim 4, wherein: the emulsifier is one of nonylphenol polyether-9, nonylphenol polyether-12, nonylphenol polyoxyethylene ether-10 and nonylphenol polyoxyethylene ether-15.
8. The multifunctional water-soluble polyester paste according to claim 4, wherein: the dispersing agent is one of polyethylene wax, aluminum stearate, calcium stearate and paraffin.
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