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Method for producing high-viscosity adhesive from polyvinyl alcohol high-strength high-modulus waste fiber

A high-strength, high-modulus, polyvinyl alcohol technology, applied in the direction of adhesives, etc., can solve the problems of low selling price, inability to add a large amount to the recycling system, poor flexibility, etc.

Inactive Publication Date: 2011-12-28
国能英力特能源化工集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because polyvinyl alcohol high-strength and high-modulus waste silk contains additives of different components, it cannot be added to the recycling system in large quantities, and it is not shaped, smooth in surface, poor in softness, and has no good use value in other fields, so it is sold Low price leads to high production cost of high-strength and high-modulus fiber products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add appropriate amount of water to polyvinyl alcohol high-strength and high-modulus waste silk and dissolve it with steam to form a stock solution. The steam pressure is 0.2-0.3MPa, and it usually takes 8-12 hours. Then directly add 5 to 15 times the amount of water to the original solution to dilute, add concentrated hydrochloric acid to adjust the pH to 3 to 4, keep the temperature of the original solution at 90°C to 93°C, add ethylene glycol at a ratio of 10 kg / ton of waste silk, and add ethylene glycol at a ratio of 25 kg / ton of the original solution Proportionally add acetaldehyde, carry out acetalization reaction for 1 to 2 hours, then adjust the pH to 6 to 7, lower the temperature to 35°C to 40°C, and filter.

Embodiment 2

[0017] Add appropriate amount of water to polyvinyl alcohol high-strength and high-modulus waste silk and dissolve it with steam to form a stock solution. The steam pressure is 0.2-0.3MPa, and it usually takes 8-12 hours. Then directly add 5 to 15 times of water to the original solution to dilute, add concentrated hydrochloric acid to adjust the pH to 3 to 4, keep the temperature of the original solution at 90°C to 93°C, add glycerol according to the ratio of 30 kg / ton of waste silk, and add glycerol according to the ratio of 10 kg / ton of the original solution Proportionally add formaldehyde, carry out acetalization reaction for 1-2 hours, then adjust the pH to 6-7, lower the temperature to 35°C-40°C, and filter.

Embodiment 3

[0019] Add appropriate amount of water to polyvinyl alcohol high-strength and high-modulus waste silk and dissolve it with steam to form a stock solution. The steam pressure is 0.2-0.3MPa, and it usually takes 8-12 hours. Then directly add 5 to 15 times of water to the original solution to dilute, add concentrated hydrochloric acid to adjust the pH to 3 to 4, keep the temperature of the original solution at 90°C to 93°C, add sorbic acid at a ratio of 50 kg / ton of waste silk, and add sorbic acid at a ratio of 50 kg / ton of the original solution Proportionally add acetaldehyde, carry out acetalization reaction for 1 to 2 hours, then adjust the pH to 6 to 7, lower the temperature to 35°C to 40°C, and filter.

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PUM

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Abstract

The invention relates to a method for producing a high-viscosity adhesive from polyvinyl alcohol high-strength high-modulus waste fiber. The process comprises the following steps of: first, dissolving the polyvinyl alcohol high-strength high-modulus waste fiber into raw solution with steam; then adding water into the raw solution to dilute the raw solution and adjusting the pH to be 3 to 4; next,keeping the temperature of the raw solution at 90 to 93 DEG C and adding a modifier into the solution for modification at the temperature; and later on, performing acetalation, adjusting the pH to be6 to 7, reducing the temperature and filtering the solution. By the method, the polyvinyl alcohol high-strength high-modulus waste fiber is subjected to modification and acetalation to produce the high-viscosity adhesive with viscosity of between 2,000 and 20,000mpa.s, so a new utilization way is provided for the polyvinyl alcohol high-strength high-modulus waste fiber; and thus the waste material is made profitable and the aim of reducing the production cost of high-strength high-modulus fiber products is fulfilled.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering, and in particular relates to a method for producing high-viscosity adhesive by using polyvinyl alcohol high-strength and high-modulus waste silk. Background technique [0002] Polyvinyl alcohol high-strength and high-modulus waste silk is waste silk produced from high-strength and high-modulus vinylon and other fiber products produced from polyvinyl alcohol. Generally, 10% to 20% of this waste will be produced during its production process. waste silk. Since polyvinyl alcohol high-strength and high-modulus waste silk contains additives of different components, it cannot be added to the recycling system in large quantities. Moreover, it is not shaped, has a smooth surface and poor flexibility, and has no good use value in other fields. Therefore, it is sold The low price leads to high production cost of high-strength and high-modulus fiber products. Contents of the invention [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J129/14
Inventor 韵明生刘远大关永举
Owner 国能英力特能源化工集团股份有限公司