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3-Methacryloylpropylenediamine Distillation Raffinate Modified Adhesive and Preparation Method

A technology of methacryloylpropylenediamine and adhesives, which is applied in the direction of adhesive types, polymer adhesive additives, non-polymer adhesive additives, etc., and can solve the problems of non-compliance with environmental protection requirements, air pollution, Surface environmental damage and other problems, to achieve the effect of eliminating free formaldehyde, increasing production costs, and low raw material costs

Inactive Publication Date: 2011-12-14
山东光华新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has become the main type of rubber used in the production of wood-based panels in my country, accounting for more than 90% of the glue used in wood-based panels. However, urea-formaldehyde resin produced by conventional production methods has a high content of free formaldehyde, which does not meet environmental protection requirements.
[0003] 3-methacryloylpropylenediamine distillation raffinate is 3-methacryloylpropylenediamine (CH 2 =C(CH 3 )-CO-NH-CH 2 -CH 2 -CH 2 -NH 2 ) The waste liquid distilled in the production process, its components are all polymer compounds containing amino groups, if it is directly discharged, it will cause great damage to the surface environment; the method of incineration will produce a large amount of nitrogen oxides, which will pollute the atmosphere It is very serious. The current method is microbial degradation, which requires a long treatment cycle and consumes a lot of money. It has always restricted the development of 3-methacryloylpropylenediamine production enterprises to a large extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take the finished urea-formaldehyde resin, add glacial acetic acid to adjust the pH value to 5, then add 3-methacryloylpropylenediamine distillation residue with 6% mass of urea-formaldehyde resin, stir well, heat the mixture to 35°C and stir for 30 minutes, then add The pH value is adjusted to 7.5 with 10% NaOH in mass percent concentration, and then packaged and discharged.

[0016] The distillation raffinate of 3-methacryloylpropylenediamine is the waste liquid after distillation in the production process of 3-methacryloylpropylenediamine, and its components and parts by weight are: 3-methacryloylpropylenediamine Amine 3, amine by-product 20, 3-methacrylpropylenediamine polymer 77.

Embodiment 2

[0018] Put 1000 kg of formaldehyde aqueous solution with a mass percentage concentration of 37% in a reaction vessel, add hydrochloric acid with a mass percentage concentration of 10% to adjust the pH value to 2-3, heat up to 32°C, and slowly add 300 kg of urea; heat the temperature to 40°C, add 105 kg of 3-methacryloylpropylenediamine distillation raffinate, stir and react for 35min, adjust the pH value of the system to 5-6 with hexamethylenetetramine solution, and then Add 210 kg of urea, control the reaction temperature at 45-50°C, and keep it warm for 40 minutes; then use 10% NaOH solution to adjust the pH value of the system to 8, cool down to 40°C, and discharge.

[0019] The distillation raffinate of 3-methacryloylpropylenediamine is the waste liquid after distillation in the production process of 3-methacryloylpropylenediamine, and its components and parts by weight are: 3-methacryloylpropylenediamine Amine 3, amine by-product 20, 3-methacrylpropylenediamine polymer 77...

Embodiment 3

[0021] 1000 kilograms of mass percent concentration of 37% formaldehyde solution is placed in the reaction vessel, adding 50 kilograms of ammonia water with a mass percent concentration of 25 percent, and adjusting the pH value with 10 percent of the mass percent concentration of NaOH under stirring conditions 8; Then heat up to 65-75°C, slowly add 300 kg of urea; after stirring for 40 minutes, raise the reaction temperature to 90°C; keep warm for 30 minutes, cool down to 85°C after the reaction viscosity is stable, and adjust the pH value to 4.5 with formic acid -5.5; keep the temperature at 80-90°C; add 200 kg of urea and 102 kg of 3-methacryloylpropylenediamine to distill the raffinate. When the glue drops into clear water and becomes white mist and does not disperse, adjust the pH to 8 with 10% NaOH by mass percent; continue to react for 20 minutes, cool down to 40°C, and discharge.

[0022] The distillation raffinate of 3-methacryloylpropylenediamine is the waste liquid a...

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PUM

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Abstract

The invention discloses a 3-methacryloylpropylenediamine distillation raffinate modified adhesive and a preparation method thereof, belonging to the field of polymer organic synthesis. The present invention adds 3-methacryloylpropylenediamine distillation residue in the finished product of urea-formaldehyde resin or in the production process of urea-formaldehyde resin, so that the amino group in the distillation residue of 3-methacryloylpropylenediamine and the free formaldehyde in the urea-formaldehyde resin Reaction to eliminate free formaldehyde in urea-formaldehyde resin. The invention does not change the production equipment of the urea-formaldehyde resin, slightly changes the production process, does not increase the production cost, and the content of free formaldehyde in the prepared adhesive is ≤0.015%.

Description

technical field [0001] The invention belongs to the field of polymer organic synthesis, and specifically relates to a 3-methacryloylpropylenediamine distillation raffinate modified adhesive and a preparation method thereof. Background technique [0002] Urea-formaldehyde resin is the main adhesive in the wood industry at home and abroad. It is widely used because of its advantages such as high bonding strength, fast curing, good operability, low production cost, and abundant and easy-to-obtain raw materials. It has become the main type of glue used in the production of wood-based panels in my country, accounting for more than 90% of the glue used in wood-based panels. However, urea-formaldehyde resin produced by conventional production methods has a high content of free formaldehyde, which does not meet environmental protection requirements. [0003] 3-methacryloylpropylenediamine distillation raffinate is 3-methacryloylpropylenediamine (CH 2 =C(CH 3 )-CO-NH-CH 2 -CH 2 -...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/24C09J11/06C09J11/08C08G12/12
Inventor 朱玉国
Owner 山东光华新材料股份有限公司