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Glue and preparation method thereof

A glue, S12 technology, applied in adhesives, adhesive types, amide/imide polymer adhesives, etc., can solve problems such as pungent taste, formaldehyde volatilization, harmful to human health, etc., to improve stability, Improve the strength, the effect of high glue quality

Inactive Publication Date: 2020-03-24
厦门锦德兴工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above existing technical solutions have the following defects: due to the addition of formaldehyde during preparation, the finished product will contain unreacted formaldehyde, and the residual formaldehyde will volatilize, produce a pungent taste and be harmful to human health if inhaled by the human body. room for improvement

Method used

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  • Glue and preparation method thereof
  • Glue and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] refer to figure 1 , is a kind of glue preparation method disclosed by the present invention, comprises the following steps:

[0052] S1. Preparation of intermediates, including:

[0053] S11. Add 100kg of polyvinyl alcohol into the first stirred tank, heat the polyvinyl alcohol to 100°C, keep it warm for 40min, then add 5kg of hydrochloric acid and 12kg of formaldehyde in turn, keep the temperature at 70°C, keep it for 45min, then add 7kg of caustic soda and 380kg of water in turn , stirring evenly to form the first intermediate, and naturally cooling to room temperature;

[0054] S12. Add 5kg of adipic acid dihydrazide, 23kg of acrylamide, and 290kg of water into the second stirred tank, stir and dissolve, then leave to react for 20h to form the second intermediate;

[0055] S2. Add the first intermediate and the second intermediate to the third stirred tank, the mass ratio of the first intermediate and the second intermediate is 1:1, the rotation speed is 15r / min, a...

Embodiment 2

[0057] refer to figure 1 , is a kind of glue preparation method disclosed by the present invention, comprises the following steps:

[0058] S1. Preparation of intermediates, including:

[0059] S11. Add 100kg of polyvinyl alcohol into the first stirred tank, heat the polyvinyl alcohol to 110°C, keep it warm for 30min, then add 5kg of hydrochloric acid and 12kg of formaldehyde in turn, keep the temperature at 80°C, keep it for 35min, then add 7kg of caustic soda and 380kg of water in turn , stirring evenly to form the first intermediate, and naturally cooling to room temperature;

[0060] S12. Add 5kg of adipic acid dihydrazide, 23kg of acrylamide, and 290kg of water into the second stirred tank, stir and dissolve, then leave to react for 30h to form the second intermediate;

[0061] S2. Add the first intermediate and the second intermediate to the third stirred tank, the mass ratio of the first intermediate and the second intermediate is 1:1, the rotation speed is 15r / min, a...

Embodiment 3

[0063] refer to figure 1 , is a kind of glue preparation method disclosed by the present invention, comprises the following steps:

[0064] S1. Preparation of intermediates, including:

[0065] S11. Add 100kg of polyvinyl alcohol into the first stirred tank, heat the polyvinyl alcohol to 105°C, keep it warm for 35min, then add 5kg of hydrochloric acid and 12kg of formaldehyde in turn, keep the temperature at 75°C, keep it for 40min, then add 7kg of caustic soda and 380kg of water in turn , stirring evenly to form the first intermediate, and naturally cooling to room temperature;

[0066] S12. Add 5kg of adipic acid dihydrazide, 23kg of acrylamide, and 290kg of water into the second stirred tank, stir and dissolve, then leave to react for 25h to form the second intermediate;

[0067] S2. Add the first intermediate and the second intermediate to the third stirred tank, the mass ratio of the first intermediate and the second intermediate is 1:1, the rotation speed is 15r / min, a...

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Abstract

The invention relates to the technical field of glue preparation, particularly to glue and a preparation method thereof. The preparation method of the glue includes: S1, preparing intermediates: S11.heating 100 parts of polyvinyl alcohol to 100-110DEG C, conducting heat preservation for 30-40min, sequentially adding 5-6 parts of hydrochloric acid and 12-14 parts of formaldehyde, keeping a constant temperature at 70-80DEG C for 35-45min, then sequentially adding 7-9 parts of caustic soda flakes and 380-420 parts of water, and stirring the substances uniformly to form a first intermediate; S12.mixing 5-7 parts of adipic dihydrazide, 23-26 parts of acrylamide and 290-310 parts of water, performing stirring for dissolving, and carrying out standing reaction for 20-30h to form a second intermediate; and S2, mixing the first intermediate and the second intermediate uniformly according to a mass ratio of 1:1-2 to form the glue. The glue is prepared by the above glue preparation method. Themethod provided by the invention utilizes adipic dihydrazide to adsorb formaldehyde, so that unreacted free formaldehyde is adsorbed by the adipic dihydrazide to limit the movement of formaldehyde molecules, and the situation that the formaldehyde molecules volatilize into the air to affect the human body health is reduced.

Description

technical field [0001] The invention relates to the technical field of glue preparation, in particular to a glue and a preparation method thereof. Background technique [0002] At present, in construction engineering, glue is widely used and is an indispensable material in construction engineering. [0003] Most of the existing glues add formaldehyde to polyvinyl alcohol to form polyvinyl formal, in order to improve the water resistance of the glue, so that the glue is not easy to whiten and fall off when it rains. [0004] The above existing technical solutions have the following defects: due to the addition of formaldehyde during preparation, the finished product will contain unreacted formaldehyde, and the residual formaldehyde will volatilize, produce a pungent taste and be harmful to human health if inhaled by the human body. There is room for improvement. Contents of the invention [0005] In view of the deficiencies in the prior art, one of the purposes of the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/14C09J133/26C09J11/06
CPCC09J11/06C09J129/14C09J133/26C08L33/26C08K5/20C08L29/14
Inventor 苏开锦
Owner 厦门锦德兴工贸有限公司
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