SAP sodium polyacrylate
Sodium polyacrylate
CAS: 9003-04-7
Molecular Formula: C3H4O2
SAP sodium polyacrylate - Names and Identifiers
| Name | Sodium polyacrylate |
| Synonyms | SAP sodium polyacrylate PAAS Sodium polyacrylate PolyacrylatesodiumAq Poly(acrylate sodium) Polyacrylatesodiumsolid Polyacrylic Acid Sodium Sodiumpolyacrylateinwater Polyacrylic acid sodium salt 2-Propenoicacid,homopolymer,sodiumsalt Poly(acrylic acid sodium salt) standard1'770 Poly(acrylic acid sodium salt) standard2'925 Poly(acrylic acid sodium salt) standard 115'000 |
| CAS | 9003-04-7 |
| EINECS | 999-999-2 |
| InChI | InChI=1/C3H4O2.Na/c1-2-3(4)5;/h2H,1H2,(H,4,5);/q;+1/p-1 |
SAP sodium polyacrylate - Physico-chemical Properties
| Molecular Formula | C3H4O2 |
| Molar Mass | 72.06 |
| Density | 1.32g/mLat 25°C |
| Appearance | White powder |
| Specific Gravity | 1.23 |
| Storage Condition | 2-8°C |
| Stability | Stable, but moisture sensitive. |
| Sensitive | 0: forms stable aqueous solutions |
| Refractive Index | n20/D 1.43 |
| Physical and Chemical Properties | White powder. Odorless and tasteless. Highly hygroscopic. High molecular compounds with hydrophilic and hydrophobic groups. Slowly dissolve in water to form a very viscous transparent liquid, the viscosity of the 0.5% solution is about Pa · s, and the viscosity is produced by water absorption swelling (such as CMC, sodium alginate), but because of the Ionic phenomenon of many anionic groups in the molecule, the molecular chain grows, and the viscosity is increased to form a highly viscous solution. Its viscosity is about 15-20 times that of CMC and sodium alginate. Heat treatment, neutral salts, organic acids have little effect on the viscosity, alkaline viscosity increases. Insoluble in ethanol, acetone and other organic solvents. Strong heat to 300 degrees does not decompose. The change of long-standing viscosity is very small, and it is not easy to be corrupted. Because of the electrolyte, it is susceptible to the influence of acid and metal ions, and the viscosity is reduced. When more than two valence metal ions (such as aluminum, lead, iron, calcium, magnesium, zinc) to form its insoluble salts, causing molecular crosslinking and gelation precipitation. Precipitation of polyacrylic acid occurred at pH 4.0 or less. |
| Use | Thickener. 1 in the food has the following effects:(1) to enhance the protein cohesion in the raw flour. (2) the starch particles are bound to each other and dispersed into the network structure of the protein. (3) the formation of a dense texture of the dough, the surface is smooth and glossy. (4) the formation of a stable dough colloid to prevent the exudation of soluble starch. (5) strong water retention, so that moisture is evenly maintained in the dough, to prevent drying |
SAP sodium polyacrylate - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R36 - Irritating to the eyes |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| RTECS | WD6826000 |
| FLUKA BRAND F CODES | 3 |
| TSCA | Yes |
| HS Code | 39069090 |
SAP sodium polyacrylate - Reference
| Reference Show more | 1. León Anchustegui, Victoria Arantza, et al. "Coencapsulation of Carbon Dots and Gold Nanoparticles over Escherichia coli for Bacterium Assay by Surface-Enhanced Raman Scattering." ACS Applied Bio Materials 4.1 (2020): 597-604.https://doi.org/10.1021/acsabm |
SAP sodium polyacrylate - Nature
Open Data Verified Data
white powder. Odorless and tasteless. Highly hygroscopic. High molecular compounds with hydrophilic and hydrophobic groups. Slowly dissolve in water to form a highly viscous, transparent liquid. Heat treatment, neutral salts and organic acids have little effect on the viscosity, and the viscosity increases when alkaline. Insoluble in ethanol, acetone and other organic solvents. Heating to 300 °c did not decompose. The change of long-standing viscosity is very small, and it is not easy to be corrupted. Susceptible to acid and metal ions, the viscosity decreased. In the case of two and more than two valence metal ions (such as aluminum, lead, iron, calcium, magnesium, zinc) to form its insoluble salt, causing molecular crosslinking and gelation precipitation.
Last Update：2024-01-02 23:10:35
SAP sodium polyacrylate - Preparation Method
Open Data Verified Data
acrylic acid or acrylic acid ester and sodium hydroxide reaction of sodium acrylate monomer, remove by-products of alcohols, after concentration, adjust the pH value, ammonium persulfate as catalyst polymerization.
Last Update：2022-01-01 09:27:45
SAP sodium polyacrylate - Use
Open Data Verified Data
It is mainly used as a viscosity reducer for drilling fluid, which is suitable for water-based drilling fluid system. It can reduce the filtration loss, improve the quality of mud cake, and has a certain ability of temperature resistance and salt resistance. Can be used directly, can also be formulated into aqueous solution for use. In addition, it is also used as a scale inhibitor and dispersant for circulating cooling water systems such as power plants, chemical plants, chemical fertilizer plants, oil refineries and air conditioning systems.
Last Update：2022-01-01 09:27:45
SAP sodium polyacrylate - Reference Information
| pH range of acid-base indicator discoloration | 6 - 9 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | sodium polyacrylate is a white powder. Odorless and tasteless. Highly hygroscopic. High molecular compounds with hydrophilic and hydrophobic groups. Slowly dissolve in water to form a very viscous transparent liquid, the viscosity of the 0.5% solution is about Pa · s, and the viscosity is one hundred due to water swelling (such as CMC, sodium alginate), but because of the Ionic phenomenon of many anionic groups in the molecule, the molecular chain grows, and the viscosity is increased to form a highly viscous solution. Its viscosity is about 15-20 times that of CMC and sodium alginate. Heat treatment, neutral salts, organic acids have little effect on the viscosity, alkaline viscosity increases. Insoluble in organic solvents such as ethanol. Strong heat to 300 degrees does not decompose. The change of long-standing viscosity is very small, and it is not easy to be corrupted. Because of the electrolyte, it is susceptible to the influence of acid and metal ions, and the viscosity is reduced. |
| Use | (I), food manufacturing: noodles: improve the taste of raw, dry and fried noodles, make it stronger. Reduce instant noodles and other fried food processing in the rate of oil absorption, saving oil. Flour products (bread, cake, wrapper, tangyuan, etc.): strengthen the adhesiveness of protein in raw flour, make the dough better extensibility, improve moisture retention, reduce cracking, improve taste. Vermicelli, vermicelli, vermicelli: vermicelli, vermicelli, vermicelli, vermicelli, vermicelli, vermicelli, vermicelli, can improve the product gluten, increase the stability. Meat balls, fish balls, Ham: in the production of fish meat convenient products, add the right amount, can make the product flavor better, taste more smooth. Fish products, canned food: meat products, aquatic products can be used as surface jelly agent, strengthen the organization, keep new used as corrosion and Scale Inhibitor, water quality stabilizer, coating thickener and water retention agent, flocculant, drilling mud treatment agent, etc. This agent is used for circulating cold water treatment of copper equipment, and its scale inhibition effect is good. When the dosage is 100 mg/L, The chelating compound can be formed with scale-forming ions in medium hardness water and flow with water, and the formation of iron oxide scale can be prevented. as thickener and stabilizer in sauce products, cream, tomato sauce. In fruit juice, wine as a dispersant. It can improve the taste of ice cream and enhance the stability. Frozen and aquatic products of the surface of the gel, play a role in preservation. Can also change the protein structure, enhance the viscoelasticity of food, improve the organization. thickener. It has the following effects in food:(1) to enhance the protein binding force in raw flour;(2) to combine starch particles and disperse into the network structure of protein;(3) form a dense dough, the surface is smooth and glossy;(4) form a stable dough colloid to prevent the exudation of soluble starch;(5) strong water retention, so that moisture is evenly maintained in the dough, prevent drying;(6) improve the extensibility of the dough;(7) The fat and oil components in the raw material are stably dispersed in the dough. As an electrolyte, it interacts with proteins, changes the structure of proteins, enhances the viscoelasticity of foods, and improves tissues. Application examples:(1) bread, cake, noodles, Tongxin, improve the utilization of raw materials, improve taste and flavor. Dosage 0.05%. (2) aquatic products, canned food, dried laver, etc., strengthen the tissue, maintain fresh taste, enhance the sense of taste. (3) sauce, tomato sauce, mayonnaise, jam, cream, soy sauce, thickener and stabilizer. (4) fruit juice, wine, etc., dispersant. (5) ice cream, caramil sugar, improve taste and stability. (6) frozen food, aquatic products, surface jelly agent (fresh). Due to the slow dissolution in water, it can be mixed with sugar, powder starch syrup, emulsifier and the like in advance to improve the dissolution rate. It is still used as a clarifier for sugar solution, brine, beverage, etc (Polymeric coagulant). Recovery of protein in wastewater and purification of wastewater by aquatic processing plant. used as fluid loss reducer in low solid drilling industry. This product is a good detergent and dispersant. It can be used in combination with other water treatment agents, for oil field water injection, cooling water, boiler water treatment, under high pH value and high concentration multiple without scaling. thickener. 1 in the food has the following effects:(1) to enhance the protein cohesion in the raw flour. (2) the starch particles are bound to each other and dispersed into the network structure of the protein. (3) the formation of a dense texture of the dough, the surface is smooth and glossy. (4) the formation of a stable dough colloid to prevent the exudation of soluble starch. (5) strong water retention, so that moisture is evenly maintained in the dough, to prevent drying. (6) the extensibility of the dough is improved. (7) the fat component in the raw material is stably dispersed in the dough. 2. As an electrolyte, it interacts with proteins, changes the structure of proteins, enhances the viscoelasticity of foods, and improves tissues. 3. Application examples: (1) bread, cake, noodles, pasta, improve the utilization of raw materials, improve taste and flavor. Dosage 0.05%. (2) aquatic products, canned food, dried laver, etc., strengthen the tissue, maintain fresh taste, enhance the sense of taste (3) seasoning sauce, tomato sauce, mayonnaise, jam, cream, soy sauce, thickeners and stabilizers. (4) fruit juice, wine, etc., dispersant. (5) ice cream, caramil sugar, improve taste and stability. (6) frozen food, aquatic products, surface jelly agent (fresh). 4. Due to the slow dissolution in water, can be pre-mixed with sugar, powder starch syrup, emulsifier, etc., in order to improve the dissolution rate. 5. As sugar solution, salt water, beverage and other clarifiers (polymer coagulant). Recovery of protein in wastewater from aquatic processing stone; And purification of wastewater thickener. Due to the slow dissolution in water, it can be mixed with sugar, powder starch syrup, emulsifier and the like in advance to improve the dissolution rate. As a clarifier for sugar, brine, beverages, etc (Polymeric coagulant). Recovery of protein in wastewater from aquatic processing stone; And purification of wastewater. |
| dispersant | sodium polyacrylate is a commonly used dispersant, also known as sodium 2-acrylate homopolymer, colorless or light yellow viscous liquid at room temperature, non-toxic, weak alkaline, insoluble in ethanol, acetone and other organic solvents, soluble in water and sodium hydroxide aqueous solution, but in calcium hydroxide, magnesium hydroxide and other aqueous solution with the increase in the number of alkaline earth metal ions, first dissolved and then precipitated. It can be operated under the conditions of alkali and medium concentration multiple without scaling, the molecular weight is about 500-3000, and the microcrystalline or sediment of calcium carbonate, calcium sulfate and other salts can be dispersed in water without precipitation, so as to achieve the purpose of scale inhibition, in addition to the use of power plants, chemical plants, fertilizer plants, oil refineries and air conditioning systems and other circulating cooling water systems in the scale and dispersant. Also widely used in paper and textile printing and dyeing, ceramics, coatings, building materials and other industries. When used as dispersant for paper coating, the relative molecular mass is 2000-4000, and the coating concentration is 65% ~ 70%, it still has good rheological property and aging stability. Molecular weight between 1000-3000, used as water stabilizer and black liquor concentration scale control agent. Molecular weight of 100000 or more, used as coating thickener and water retention agent, can make the carboxylated styrene butadiene latex, acrylate emulsion and other synthetic latex viscosity growth, to avoid the precipitation of water, to maintain the stability of the coating system. Molecular weight above 1000000, used as flocculant. It can also be used as a super absorbent resin, a soil conditioner, and a tackifier, an emulsifying dispersant, etc. in the food industry. The molecular structure of sodium polyacrylate is a water-soluble linear polymer. The small relative molecular mass is a liquid, and the large may be a solid. Commercial solids are white powders or granules, Odorless and tasteless, water swelling, soluble in aqueous caustic soda. Highly hygroscopic. High molecular compounds with hydrophilic and hydrophobic groups. Slowly dissolve in water to form a very viscous transparent liquid, the viscosity of the first solution of about 0.5% CP, its viscosity is not like CMC and sodium alginate as water swelling, but because of the Ionic phenomenon of many anionic groups in the molecule, the molecular chain grows, and the viscosity is increased to form a highly viscous solution. Its viscosity is about 15-20 times that of sodium carboxymethyl cellulose (CMC) and sodium alginate. It has good alkali resistance, little change in viscosity for a long time and is not easy to rot. Heat treatment, neutral salts, organic acids have little effect on the viscosity, alkaline viscosity increases. Strong heat to 300 degrees does not decompose. Because of the electrolyte, it is susceptible to the influence of acid and metal ions, and the viscosity is reduced. When a sufficient amount of divalent or above metal ions (such as aluminum, lead, iron, calcium, magnesium, zinc) form their insoluble salts, causing molecular crosslinking and gelation precipitation. However, when the amount of the divalent metal ion is small, it is still a solution, so it can be used as a washing aid to prevent the re-deposition of dirt. |
| Application | (1) bread, cake, noodles, pasta, improve the utilization of raw materials, improve taste and flavor. Dosage 0.05%. (2) aquatic products, canned food, dried laver, etc., strengthen the tissue, maintain fresh taste, enhance the sense of taste (3) seasoning sauce, tomato sauce, mayonnaise, jam, cream, soy sauce, thickeners and stabilizers. (4) fruit juice, wine, etc., dispersant. (5) ice cream, caramil sugar, improve taste and stability. (6) frozen food, aquatic products, surface jelly agent (fresh). |
| Food-grade sodium polyacrylate | sodium polyacrylate has been used for thickening, thickening and preservation of various foods in foreign countries since the sixties of the last century, 2000 China's Ministry of Health also formally approved as a food-grade thickener. limited use: According to China's food additive standards. The use of food-grade sodium polyacrylate is as follows: 1. The use as a thickener in food has the following effects: (1) enhancing the protein cohesion in raw flour. (2) the starch particles are bound to each other and dispersed into the network structure of the protein. (3) a compact dough is formed with a smooth and glossy surface. (4) formation of a stable dough colloid to prevent exudation of soluble starch. (5) strong water retention, uniform retention of water in the dough, and prevention of drying. (6) improved dough extensibility. (7) the fat component in the raw material is stably dispersed in the dough. 2, as the electrolyte and protein interaction, change the protein structure, enhance the viscoelasticity of food, improve the organization. 3. Application Examples: (1) Bread, Cake, noodles, open face, improve the utilization of raw materials, improve taste and flavor. Dosage 0.05%. (2) aquatic products, canned food, dried laver, etc., strengthen the tissue, maintain fresh taste, enhance the sense of taste. (3) sauce, tomato sauce, mayonnaise, jam, cream, soy sauce, thickener and stabilizer. (4) fruit juice, alcohol, etc., dispersant. (5) ice cream, caramil sugar, improve taste and stability. (6) frozen food, aquatic products, surface jelly agent (fresh). 4, due to the slow dissolution in water, can be mixed with sugar, powder starch syrup, emulsifier, etc. in advance, to improve the dissolution rate. 5. Sodium polyacrylate can be used as a clarifier (polymer coagulant) for sugar liquids, saline, beverages, and the like. |
| toxicity | LD50>10g/kg (mouse, oral). Subacute test: rats below 0.5g/kg/day, 6 months without abnormal. |
| usage limit | GB 2760-2000: food, 2.0g/kg. The maximum dosage in Japan is 0.2%(1993). |
| preparation process | add 53kg of sodium hydroxide and suitable amount of water into the reactor, slowly stir and add acrylic acid, adding relative molecular mass regulator and soda ash, stirring to disperse, control the temperature of the system is 80 deg C (acrylic acid and sodium hydroxide neutralization heat can reach this temperature), adding 2.2 Potassium persulfate, stirring evenly, after about 10min, rapid polymerization occurred, and a white foam product was finally obtained. The product was cooled and pulverized to obtain a sodium polyacrylate product. |
| production method | deionized water and 34kg of chain transfer agent isopropanol were sequentially added to the reaction kettle and heated to 80-82 °c. 14kg of ammonium persulfate and 170kg of an aqueous solution of monomeric acrylic acid (deionized water) were added dropwise. After the completion of the drip, the reaction was carried out for 3H. Cooled to 40 °c, 30% aqueous NaOH was added and neutralized to a pH of 8.0 to 9.0 by distilling off isopropanol and water to give a liquid product. Spray-drying gave a solid product. acrylic acid or acrylic ester is reacted with sodium hydroxide to obtain sodium acrylate monomer, which is obtained by removing by-product alcohols, concentrating and adjusting pH value, and polymerizing with ammonium persulfate as catalyst. sodium acrylate monomer was prepared by the reaction of acrylic acid and sodium hydroxide, and then polymerized into sodium polyacrylate under the catalysis of ammonium persulfate. sodium polyacrylate with a relative molecular mass of 1 000-3 000 is added into a reaction kettle to prepare 30% aqueous solution. |
Last Update：2024-04-10 22:41:03
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