Preparation method of polyacrylamide for incense making adhesive

A technology of polyacrylamide and acrylamide, which is applied in the direction of gasification substances, can solve the problems of high price, unfavorable environmental protection, and difficult to obtain plant adhesives, and achieves the effects of strong adhesion and low moisture absorption rate.

Active Publication Date: 2019-10-15
ANHUI TIANRUN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the adhesives used for making incense include traditional chemical adhesives and plant adhesives. Plant adhesives are not easy to obtain and the price is relatively high. However, traditional chemical adhesives contain a large amount of harmful substances such as formaldehyde, which is not conducive to environmental protection.

Method used

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  • Preparation method of polyacrylamide for incense making adhesive
  • Preparation method of polyacrylamide for incense making adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of polyacrylamide for making fragrance adhesives, comprising the following steps:

[0032] S1: Mix acrylamide, acrylic acid, chitosan and deionized water at a mass ratio of 1:0.2:0.3:3 to obtain monomer solution A for later use;

[0033] S2: Mix methyl methacrylate, styrene, monomethyl fumarate and ethanol at a mass ratio of 1:1:0.1:3 to obtain a monomer solution B for later use;

[0034] S3: Mix the monomer solutions A and B at a mass ratio of 2:1 to obtain a mixed monomer solution, add polyvinyl alcohol with a mass fraction of 1% acrylamide to it, and then add urea with a mass fraction of 1% acrylamide to adjust PH to 5.5;

[0035] S4: After the S3 reaction system solution was stirred evenly, the temperature was lowered to 0°C, nitrogen gas with a purity greater than 99.9% was introduced to drive off the oxygen in the system, and then 0.02% of the mass of the mixed monomer solution in S3 was added. DMAP catalyst, the mixed monomer solution in S3 ...

Embodiment 2

[0039] A preparation method of polyacrylamide for making fragrance adhesives, comprising the following steps:

[0040] S1: Mix acrylamide, acrylic acid, chitosan and deionized water at a mass ratio of 1:0.3:0.4:3.5 to obtain monomer solution A for later use;

[0041] S2: Mix methyl methacrylate, styrene, monomethyl fumarate and ethanol at a mass ratio of 1:1.1:0.2:3.5 to obtain a monomer solution B for later use;

[0042] S3: Mix the monomer solutions A and B at a mass ratio of 2:1 to obtain a mixed monomer solution, add polyvinyl alcohol with a mass fraction of 1.5% of acrylamide to it, and then add urea with a mass fraction of 2% of acrylamide to adjust PH to 5.5;

[0043] S4: After the S3 reaction system solution was stirred evenly, the temperature was lowered to 1°C, nitrogen gas with a purity greater than 99.9% was introduced to drive off the oxygen in the system, and 0.03% of the mass of the mixed monomer solution in S3 was added. DMAP catalyst, the mixed monomer soluti...

Embodiment 3

[0047] A preparation method of polyacrylamide for making fragrance adhesives, comprising the following steps:

[0048] S1: Mix acrylamide, acrylic acid, chitosan and deionized water at a mass ratio of 1:0.4:0.5:4 to obtain monomer solution A for later use;

[0049] S2: Mix methyl methacrylate, styrene, monomethyl fumarate and ethanol at a mass ratio of 1:1.2:0.3:4 to obtain a monomer solution B for later use;

[0050] S3: Mix the monomer solutions A and B at a mass ratio of 2:1 to obtain a mixed monomer solution, add polyvinyl alcohol with a mass fraction of 2% of acrylamide to it, and then add urea with a mass fraction of 3% of acrylamide to adjust pH to 6.0;

[0051] S4: After the S3 reaction system solution was stirred evenly, the temperature was lowered to 2°C, nitrogen gas with a purity greater than 99.9% was introduced to drive off the oxygen in the system, and then 0.04% of the mass of the mixed monomer solution in S3 was added. DMAP catalyst, the mixed monomer solutio...

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Abstract

The invention provides a preparation method of polyacrylamide for an incense making adhesive. The preparation method comprises the following steps: S1, mixing acrylamide, acrylic acid, chitosan and deionized water to obtain a monomer solution A; S2, mixing methyl methacrylate, styrene, monomethyl fumarate and ethanol to obtain a monomer solution B; S3, mixing the monomer solution A and the monomersolution B, adding polyethylene and urea, and adjusting pH to be 5.5-6.5; S4, cooling to the temperature of 0-4 DEG C, introducing nitrogen and displacing oxygen, and then adding a DMAP catalyst anda chain extender; S5, heating to the temperature of 10-15 DEG C, and adding a cross-linking agent, a chain transfer agent, a reducing agent and an oxidizing agent into the mixture every 3 min; S6, heating to the temperature of 75-85 DEG C, carrying out heat-insulation reaction for 1-1.5 h, taking out an adhesive, adding caustic soda, hydrolyzing at the temperature of 80-90 DEG C for 1-2 h, and drying, crushing, granulating and carrying out secondary drying to obtain the final product. The polyacrylamide prepared by the invention has certain hydrophobic and water-resistant performance, the molecular weight reaches 30,000,000, and the polyacrylamide has the advantages of strong adhesive force, low moisture absorption rate, corrosion resistance and antibiosis, environmental protection and nopollution after combustion, and the like.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a preparation method of polyacrylamide for making fragrance adhesives. Background technique [0002] In my country, the use of incense not only originated very early, but also has a close and profound connection with religion, so the demand for incense is very high. Once the incense absorbs water and gets wet, it is easy to break and break, mildew occurs, it is difficult to ignite, and the quality is affected. The raw materials of incense mainly include spices (such as sandalwood powder, agarwood powder, wormwood powder), wood powder, adhesives, etc. , The types of spices and wood powder are relatively fixed, so their physical properties are also relatively fixed. If you want to improve the moisture-proof, water-resistant, and anti-corrosion properties of incense, you mainly start with adhesives. [0003] At present, the adhesives used for making incense i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C08F4/40A61L9/02
CPCA61L9/02C08F4/40C08F251/00C08F220/56
Inventor 刘彭城汪艳陈建波张传银乔磊磊张弓
Owner ANHUI TIANRUN CHEM CO LTD
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