CN110974728A

CN110974728A - Tooth care material and preparation process

Info

Publication number: CN110974728A
Application number: CN201911297116.5A
Authority: CN
Inventors: 吴有庭; 陈雷; 庄薇娜
Original assignee: Suzhou Meiruizi Biotechnology Co ltd
Current assignee: Suzhou Meiruizi Biotechnology Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-04-10

Abstract

The invention relates to a tooth care material and a preparation process thereof, which is prepared by carrying sodium polyaspartate with hydrated silicon dioxide. The hydrated silicon dioxide particles prepared by the technology are free of agglomeration, can be used independently, and can also be used as an additive ingredient to be matched with toothpaste and mouthwash, wherein the hydrated silicon dioxide has the effect of cleaning the surfaces of teeth, and the polyaspartic acid has the effect of inhibiting tooth stains and tartar.

Description

Tooth care material and preparation process

Technical Field

The invention relates to a preparation method of dental care materials, in particular to a preparation process of polyaspartic acid sodium carried by hydrated silicon dioxide.

Background

Hydrated silicon dioxide is a commonly used dental grinding material and has the characteristics of easy processing, strong cleaning power, no color, no taste and no toxicity. In the production of hydrated silica, if the process is not properly controlled, agglomeration is easy to occur, agglomerated silica particles can damage tooth enamel in use, and manufacturing non-agglomerated silica is an important subject of toothpaste quality control.

Polyaspartic Acid (PASP) is a high molecular polymer formed by condensation polymerization of L-aspartic acid, and experiments show that sodium polyaspartate can be used for reducing the formation of tartar, effectively controlling the development of dental plaque and culturing a bacterial biofilm outside teeth. Meanwhile, the cleaning of stains and artificial pigments on teeth is increased, and the staining of teeth is reduced. However, due to the lack of suitable carriers, there is currently little on the market regarding the use of polyaspartic acid for dental care.

Disclosure of Invention

The invention aims to provide a safe and sanitary tooth care material, which is a non-agglomerated silica material loaded with polyaspartic acid.

The invention relates to a tooth care material and a preparation process thereof, wherein the tooth care material is prepared by carrying sodium polyaspartate on hydrated silicon dioxide, and the preparation process comprises the following steps:

step 1) preparing a reaction solution, comprising: water glass (Na2SiO3) solution, dilute sulfuric acid, a blocking agent, a surfactant and sodium polyaspartate.

And 2) putting the water glass solution into a hydrothermal reaction container, stirring at 80 ℃, adding dilute sulfuric acid to adjust the pH value to 8-9, adding a surfactant and sodium polyaspartate, and stirring for 15 minutes.

And 3) continuously adding dilute sulfuric acid to adjust the pH value to 5, adding a blocking agent, keeping the temperature at 80 ℃ and continuously stirring, supplementing dilute sulfuric acid to keep the pH value of the system at 4.5-5 during the reaction, and reacting for 1 h.

And 4) sieving the reaction mother liquor with a 100-mesh sieve, carrying out filter pressing dehydration, washing with deionized water for three times, pulping, and drying to obtain a finished product.

Further, in the step 1), the mass percent concentration of the water glass solution is 15-20%, the mass percent concentration of the dilute sulfuric acid is 5-20%, and the mass percent concentration of the sodium polyaspartate is 20-100%.

Further, in the step 1), the blocking agent is sodium carboxymethyl cellulose, sodium hydroxypropyl cellulose, water-soluble starch or a combination thereof.

Further, in the step 1), the surfactant is a fat-based sulfonate, a fatty acid salt, a fatty alcohol ether sulfate or a combination thereof.

Further, in the step 2), the addition amount of the surfactant is 0.1-0.5% of the total amount of the reaction liquid, and the net addition amount of the sodium polyaspartate is 0.1-1% of the total amount of the reaction liquid.

Further, in the step 3), the addition amount of the blocking agent is 0.1% -1% of the total amount of the reaction liquid, and the stirring speed is 400-600 rpm.

Detailed Description

The technical scheme of the invention is as follows:

Example 1:

10L of 10 mass percent water glass solution is put into a hydrothermal reaction container, stirred at 80 ℃, added with 10 mass percent dilute sulfuric acid to adjust the pH value to 8.5, added with 20g of sodium dodecyl sulfate and 500g of 20 mass percent sodium polyaspartate solution, and stirred for 15 minutes. Dilute sulfuric acid was added to adjust pH to 5, and 20g of sodium hydroxypropylcellulose was added, the temperature was maintained at 80 ℃ and the mixture was stirred at 500rpm, during which dilute sulfuric acid was supplemented to maintain the system pH at 4.5-5, and the reaction was carried out for 1 hour. The reaction mother liquor is sieved by a 100-mesh sieve, and no residual aggregate exists. Filter pressing and dewatering, washing with deionized water for three times, pulping and drying to obtain the finished product with the yield of 83.5 percent and the average grain diameter of 5.6 mu m.

Example 2:

10L of 20 mass percent water glass solution is put into a hydrothermal reaction container, stirred at 80 ℃, added with 10 mass percent dilute sulfuric acid to adjust the pH value to 8.5, added with 20g of sodium dodecyl sulfate and 500g of 20 mass percent sodium polyaspartate solution, and stirred for 15 minutes. Dilute sulfuric acid was added to adjust pH to 5, and 20g of sodium hydroxypropylcellulose was added, the temperature was maintained at 80 ℃ and the mixture was stirred at 500rpm, during which dilute sulfuric acid was supplemented to maintain the system pH at 4.5-5, and the reaction was carried out for 1 hour. The reaction mother liquor is sieved by a 100-mesh sieve, and no residual aggregate exists. Filter pressing and dewatering, washing with deionized water for three times, pulping and drying to obtain the finished product with the yield of 77.0 percent and the average grain diameter of 8.3 mu m.

Example 3:

10L of 10 mass percent water glass solution is put into a hydrothermal reaction container, stirred at 80 ℃, added with 10 mass percent dilute sulfuric acid to adjust the pH value to 8.5, added with 30g of sodium dodecyl sulfate and 500g of 20 mass percent sodium polyaspartate solution, and stirred for 15 minutes. Dilute sulfuric acid was added to adjust pH to 5, and 30g of sodium hydroxypropylcellulose was added, the temperature was maintained at 80 ℃ and the mixture was stirred at 500rpm, during which dilute sulfuric acid was supplemented to maintain the system pH at 4.5 to 5, and the reaction was carried out for 1 hour. The reaction mother liquor is sieved by a 100-mesh sieve, and no residual aggregate exists. Filter pressing and dewatering, washing with deionized water for three times, pulping and drying to obtain the finished product with the yield of 72.2 percent and the average grain diameter of 3.8 mu m.

Example 4:

10L of 10 mass percent water glass solution is put into a hydrothermal reaction container, stirred at 80 ℃, added with 10 mass percent dilute sulfuric acid to adjust the pH value to 8.5, added with 500g of 20 mass percent sodium polyaspartate solution and stirred for 15 minutes. The pH value is adjusted to 5 by adding dilute sulfuric acid continuously, the temperature is kept at 80 ℃ and stirring is carried out at the rotating speed of 500rpm, and the pH value of the system is kept between 4.5 and 5 by supplementing the dilute sulfuric acid during the stirring, and the reaction is carried out for 1 hour. The reaction mother liquor is sieved by a 100-mesh sieve, and the residual agglomerates are generated.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention relates, several simple deductions or substitutions may be made without departing from the spirit of the invention, and all shall be considered as belonging to the scope of the invention.

Claims

1. A tooth care material and a preparation process thereof are characterized in that: the tooth care material is prepared by carrying sodium polyaspartate on hydrated silicon dioxide, and the preparation process comprises the following steps:

2. The dental care material and the preparation process according to claim 1, characterized in that: in the step 1), the mass percent concentration of the water glass solution is 15-20%, the mass percent concentration of the dilute sulfuric acid is 5-20%, and the mass percent concentration of the sodium polyaspartate is 20-100%.

3. The dental care material and the preparation process according to claim 1, characterized in that: in the step 1), the blocking agent is sodium carboxymethyl cellulose, sodium hydroxypropyl cellulose, water-soluble starch or a combination thereof.

4. The dental care material and the preparation process according to claim 1, characterized in that: in the step 1), the surfactant is a fat-based sulfonate, a fatty acid salt, a fatty alcohol ether sulfate or a composition thereof.

5. The dental care material and the preparation process according to claim 1, characterized in that: in the step 2), the addition amount of the surfactant is 0.1-0.5% of the total amount of the reaction liquid, and the net addition amount of the sodium polyaspartate is 0.1-1% of the total amount of the reaction liquid.

6. The dental care material and the preparation process according to claim 1, characterized in that:

in the step 3), the addition amount of the blocking agent is 0.1-1% of the total amount of the reaction liquid, and the stirring speed is 400-600 rpm.