Use of high alkali alcoholysis products

Main use

1.100-27H is mainly used for the manufacture of fabric sizing, coatings, adhesives, acetal derivatives, widely used in paper processing, emulsifiers, protective colloids and dispersants, can also be used as raw materials for the production of film, soil modifier, polyvinyl alcohol fiber, especially suitable for textile sizing.

2.100-40H, 100-50H, 100-55H are suitable for the manufacture of coatings and adhesives, especially for architectural coatings.

3. Especially suitable for the production of urea-formaldehyde resin.

Dissolved

Dissolution equipment:A stirred dissolving tank or a container that can be warmed.

Dissolution method:Add quantitative water into the equipment, then add quantitative flocculent products, soak for 30 minutes, fully swell, heat up to 88-95 ℃ under stirring, keep warm for 30-60 minutes, sample the liquid to the glass, observe the solution, if there are impurities and keep the temperature for 30 minutes, then enter the next step without impurities. Or add 1~2 drops of iodine solution to the sample solution taken out. If blue granular transparent body appears, it is not completely dissolved, and then measure it after 30 minutes of constant temperature. Otherwise, it indicates that it is completely dissolved and can enter the next process.

Solution storage

• Anti-corrosion: if stored for more than a week, the water in the aqueous solution of instant glue will be corrupt, but does not affect the performance, can add 0.01-0.05%(based on instant glue) of salicylic acid or other preservatives.
• Anti-rust: trace weak alkali can be added when storing iron, and sodium nitrite of 0.02-0.05%(based on instant glue wire) should be added when using copper, preferably stainless steel and plastic containers.
• Gel: Instant glue can be dissolved in a polar solution containing hydroxyl groups, but it is easy to become a gel at low temperature. After heating and stirring, it can become a solution again without affecting its performance.
• Causes and Analysis of Common Abnormal Phenomena in Use
• Abnormal phenomenon cause analysis processing method
• Instant glue in aqueous solution
• clumps or yellowing of the solution

1, before dissolving without soaking or directly feeding in hot water;

2, mixing is not timely;

3, the heating speed is too fast;

4. The initial dissolution temperature is too high.

1. Soak in room temperature water for 30 minutes before dissolving;

2. Stir while feeding;

3, slow heating, appropriate to extend the dissolution time;

4. The temperature during dissolution shall not be lower than 90 ℃.

The concentration of instant glue yarn aqueous solution is low (or high)

1, too much water (less) or less (more) into the product;

2, the type of product specifications are not appropriate.

Add the product (or water) to the appropriate concentration;

4, switch to the right product.

Serious foaming during dissolution. The heating rate is too fast or the temperature is too high. Control the heating temperature, reduce the temperature, add an appropriate amount of defoaming agent or leave the instant glue yarn aqueous solution to defoam.

There are still insoluble particles for a long time. The instant glue yarn contains a very small amount of insoluble matter.

Filter the dissolved instant glue wire solution with a 120 mesh screen

Low alkali complete alcoholysis products use

Application Introduction

• Construction glue
• The product is suitable for the production of construction glue. It has strong adhesion, good film forming, good water resistance of the film, good stability of solution storage, low price, non-toxic and tasteless, green and environmentally friendly, and does not require special boilers and kettle type Dissolution equipment for dissolution, simple and convenient, energy saving and consumption reduction. Construction glue to water as a solvent, instant glue wire is usually used in the proportion of 4-5%.
• Textile size
• It is suitable for imitation porcelain coating, which has good weather resistance, water resistance and corrosion resistance. The coating does not swell and embrittlement when exposed to water, and has low price, simple production, convenient construction, non-toxic and tasteless, and environmental protection. When using, first dissolve the product into construction glue, and when scraping the imitation porcelain paint, mix about 1 part of instant glue glue and 2 parts of powder evenly to construct. The temperature is high in summer. When boiling glue, 1 pack of instant glue can be added with 1 pack of cellulose (about 0.5kg) or 100-150g of polyacrylamide at the same time, so that the boiled glue will be thicker and can also prevent the glue from drying too fast during coating and scraping.
• Textile size
• The 100-27(H) product is particularly suitable for use in textile pastes. It has the advantages of fast dissolution, high concentration, low viscosity, small sizing amount, good miscibility (mixed with other slurry, the mixture is relatively stable, and it is not easy to have stratification phenomenon) and excellent film-forming property. It has good adhesion to cotton, hemp, polyester, vinylon and viscose fiber. The pulp film is colorless and transparent, strong toughness, wear resistance, sun resistance, high mechanical strength, which can reduce the breakage rate of the cloth machine, and the woven cloth is smooth and smooth, the cloth surface is not rough, and can increase the number of winding, and the desizing is also very easy.
• urea-formaldehyde resin
• According to the production process and characteristics of urea-formaldehyde resin and the feedback and requirements of various urea-formaldehyde resin manufacturers, our products have good initial viscosity, good solubility and stable quality. Applicable models are 100-27(H), 100-40(H) and 100-50(H), users can choose according to their own needs.
• paper processing
• Suitable for paper processing, its adhesive force, film-forming strong, can improve the paper moisture resistance, abrasion resistance, folding resistance, tear strength, gloss, smoothness and printing applicability, can be used instead of starch and casein or.

Main use

Suitable for manufacturing coatings, water soluble films, degradable films and adhesives.

Dissolution Considerations

Dissolving device:

Dissolving tank material usually use stainless steel or glass-lined reactor, the use of black (raw) iron material is easy to rust, and the product is contaminated, should avoid the use. The true specific gravity of the product is greater than that of water, so it is easy to sink to the bottom of the reactor. The enamel reactor is usually equipped with a bottom valve to avoid blocking the pipeline. The heat source is best to make the jacket or water bath, or direct heating with steam. Direct heating with open flame is easy to make the bottom of the tank overheated and burnt, which should be avoided.

Dissolution method:

a Add the required amount of water to the dissolving kettle at room temperature (do not directly add the product to dissolve in water above 40 ℃ to avoid caking and skin dissolution.

B under the condition of starting stirring, slowly add the measured product (the dosage is determined according to the production formula) into the dissolving kettle to disperse it.

C under stirring (stirring speed is generally 60~120 r/min, depending on the stirring type and dissolution equipment) slowly heating and dissolving, heating can be jacketed, water bath and other indirect heating methods, can also be used for direct heating with water vapor, but not direct heating with open flame, in order to avoid local overheating produce paste coke phenomenon.

d After warming to 96°C -98°C, keep the temperature until the solution is completely dissolved. The dissolution temperature should not exceed 100 ℃, so as not to cause foaming and overflow of the material due to the rapid evaporation of water, but the dissolution speed of the product is slower when the dissolution temperature is lower than 95 ℃. The identification method of whether the dissolution is complete is as follows: take the dissolved liquid with a glass beaker and observe it in a bright place. The solution is clear and there are no visible transparent particles.

In the preparation of aqueous solution, the product is not easy to foam. However, when the solution concentration is high, the stirring speed is fast, or the dissolution temperature is too high, foam will also be generated. When the foam occurs, the heating should be stopped, the stirring should be suspended, and the foam should be gradually heated and stirred after it disappears. To suppress foam, defoamers: 0.01-0.05%(based on product) of n-octanol, tributyl phosphate 0.2-0.5%(based on product) or silicone emulsions may be added, if necessary.

It is suggested that the user should filter the product with 120 mesh screen (aperture 0.125m) after the product is completely dissolved, so as to achieve better use effect.

Product modification

After the product is dissolved in water is a kind of excellent performance of the adhesive, but because of the high viscosity of the product, and is completely alcoholysis products, its aqueous solution under natural conditions for long-term storage prone to gel, so in practical applications, often using modifiers for modification, the following describes the commonly used modification methods:

According to the above-mentioned matters needing attention in dissolving the product, completely dissolve it into an aqueous solution of about 10%, add hydrochloric acid at a temperature of 90-95 ℃, adjust the PH value of the system to about 2, add an appropriate amount of modifier (the addition amount is 20%-30% of the product) to react to the end point, immediately add an appropriate amount of alkali to adjust the PH value of the system to 7 to terminate the reaction, and add an appropriate amount of water as required after cooling to prepare various adhesives. The modified product aqueous solution has stronger initial viscosity, good low-temperature fluidity, excellent anti-freezing performance, and will not gel when stored at 0°C.

Application Introduction

Adhesive

The product is an excellent adhesive, especially for porous materials (such as paper, wood, etc.). The adhesive produced by the product uses water as the solvent, the product is non-flammable, non-toxic and harmless, safe and environmentally friendly. The production method is usually carried out according to the "product modification", and the ratio of the product and water can be determined according to the specific bonding process requirements.

imitation porcelain paint

The product is suitable for imitation porcelain coating, which has good weather resistance, water resistance, corrosion resistance, the coating does not swell in water, does not embrittle, and the price is low, more glue, non-toxic and tasteless, green and environmental protection, but it needs special dissolution equipment, which is more suitable for industrial production.

Construction glue

The product is very suitable for making construction glue. Its stable quality, more glue, strong adhesion, good initial viscosity, good solubility, good film-forming, good water resistance of the film, high viscosity of the aqueous solution, good storage stability, low price, non-toxic and tasteless, green and environmentally friendly.

Use of low alkali partial alcoholysis products

Main use
Suitable for manufacturing coatings, water soluble films, degradable films and adhesives.

Dissolution Considerations
Dissolving device:
Dissolving tank material usually use stainless steel or glass-lined reactor, the use of black (raw) iron material is easy to rust, and the product is contaminated, should avoid the use. The true specific gravity of this product is greater than that of water, so it is easy to sink to the bottom of the reactor. The bottom valve of the glass-lined reactor is usually used to avoid blocking the pipeline. The heat source is best to make the jacket or water bath, or direct heating with steam. Direct heating with open flame is easy to make the bottom of the tank overheated and burnt, which should be avoided.

Dissolution method:

• A at room temperature, the required amount of water is added to the dissolving kettle (do not directly add this product to dissolve in water above 40 ℃, so as to avoid caking and skin dissolving endogenous phenomenon.
• B under the condition of starting stirring, slowly add the measured product (the dosage depends on the production formula) into the dissolving kettle to disperse it.
• C under stirring (stirring speed is generally 60~120 r/min, depending on the stirring type and dissolution equipment) slowly heating and dissolving, heating can be jacketed, water bath and other indirect heating methods, can also be used for direct heating with water vapor, but not direct heating with open flame, in order to avoid local overheating produce paste coke phenomenon.
• d After warming to 80°C, keep the temperature until the solution is completely dissolved. The identification method of whether the dissolution is complete is as follows: take the dissolved liquid with a glass beaker and observe it in a bright place. The solution is clear and there are no visible transparent particles; Or take out a small amount of solution and add 1-2 drops of iodine solution. If blue granular transparent body appears, it indicates that it has not been completely dissolved. If the color can spread evenly, it indicates that it has been completely dissolved.
• In the preparation of aqueous solution, this product is not easy to bubble. However, when the solution concentration is high, the stirring speed is fast, or the dissolution temperature is too high, foam will also be generated. When the foam occurs, the heating should be stopped, the stirring should be suspended, and the foam should be gradually heated and stirred after it disappears. In order to suppress foam, if necessary, defoamer can be added: O.01-0.05 (based on this product) of n-octanol, tributyl phosphate 02-0.5% (based on this product) or silicone emulsion.
• It is suggested that users should use 120 mesh screen (aperture 0.125mm) to filter the product after it is completely dissolved, so as to achieve better use effect.

    
Application Introduction

Adhesive
This product is an excellent adhesive, especially for porous materials (such as paper, wood, etc.) bonding performance is very good. The adhesive produced by this product, with water as solvent, is non-combustible, non-toxic and harmless, safe and environmentally friendly.
dry powder mortar
This product has a good film, the formation of the film has excellent force, solvent resistance, it with cellulose ether water retention agent, they can improve the flexibility of cement mortar and gypsum building materials, water retention, improve the mortar adhesion, to a certain extent, can reduce the amount of latex powder to reduce the cost of dry mortar.
water soluble film
The film made of this product has good transparency, high tensile and crack strength, good moisture permeability and heat insulation, oil resistance, organic medicine resistance, no static electricity, and can be dissolved in water at room temperature. Practical in textile packaging, can also be used as food packaging, non-toxic, non-polluting, biodegradable.