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Melamine aldehyde-based bonding resin and preparation method thereof

A melamine aldehyde-based, adhesive resin technology, applied in the direction of aldehyde/ketone condensation polymer adhesives, adhesive types, adhesives, etc., can solve the problem of long curing time and the inability to achieve optimal control of 20°C Tu-4 viscosity Time, small dilution ratio, etc.

Inactive Publication Date: 2020-02-21
江苏长顺高分子材料研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is that in the prior art, the dilution ratio of melamine-aldehyde-based adhesive resin in water at normal temperature is small, the curing time is long at high temperature, and the technical problem that the optimal control time of 20°C coating-4 viscosity cannot be achieved

Method used

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  • Melamine aldehyde-based bonding resin and preparation method thereof
  • Melamine aldehyde-based bonding resin and preparation method thereof
  • Melamine aldehyde-based bonding resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Add an aqueous solution of formaldehyde with a concentration of 37% by mass to the reaction vessel A: 190.5 g, use 0.4 g of an aqueous sodium hydroxide solution with a concentration of 25% by mass, adjust the PH value of the aqueous formaldehyde solution to 8.5, and add melamine 105 G, 31.5 g of benzo-melamine, heated and stirred to 90°C, until the solution in the reaction vessel A is colorless, clear and transparent, heat preservation and stirring to obtain material I;

[0027] 2) Take out 1ml material I from reaction vessel A and add it to 100ml water at 50℃ and stir evenly. When the reaction product is insoluble in water, reduce the temperature of reaction vessel A to 85℃, add propionamide: 10g, propionamide After being completely dissolved in the reaction vessel A, the temperature is lowered to 40°C, spray-dried, and dried with a spray dryer. The inlet air temperature of the spray dryer is 140°C and the outlet air temperature is 80°C to obtain a white solid of melami...

Embodiment 2 to 5 and comparative example 1 to 2

[0029] The experiments of Example 2 to Example 5 and Comparative Examples 1 to 2 were carried out according to the steps of Example 1. The only difference is the type of reaction raw materials, the ratio of raw materials, the reaction time and temperature are different, see Table 2 for details; the prepared melamine The quality inspection data of the aldehyde-based adhesive resin is shown in Table 4.

[0030] Wherein, in Example 3, when an acrolein aqueous solution with a mass percentage concentration of 99% is used, water needs to be added to the acrolein aqueous solution to adjust the mass percentage concentration of the acrolein aqueous solution to 55%.

[0031] Wherein, in Example 4, when an aqueous solution of butyraldehyde with a concentration of 99% by mass is used, water needs to be added to the aqueous solution of butyraldehyde to adjust the concentration of the aqueous solution of butyraldehyde to 60% by mass.

[0032] Wherein, in Example 5, when an isobutyraldehyde aqueous...

Embodiment 6 to 10 and comparative example 3

[0039] The experiments of Example 6 to Example 10 and Comparative Example 3 were carried out according to the steps of Example 1. The only difference is the type of reaction raw materials, the ratio of raw materials, the reaction time and temperature are different, see Table 3 for details, the prepared melamine aldehyde group The quality inspection data of the adhesive resin is shown in Table 4.

[0040] Wherein, when an acrolein aqueous solution with a mass percentage concentration of 99% is used in Example 9, water needs to be added to the acrolein aqueous solution to adjust the mass percentage concentration of the acrolein aqueous solution to 55%.

[0041] Table 3 The raw material weight of each component in Example 6 to Example 10 and Comparative Example 3 (unit: g)

[0042]

[0043]

[0044]

[0045] Table 4 Quality inspection data of melamine aldehyde-based adhesive resins in Examples 1 to 8 and Comparative Examples 1 to 3

[0046]

[0047] Among them, the cured product in Compa...

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Abstract

The invention relates to melamine aldehyde-based bonding resin and a preparation method thereof. The invention mainly aims to solve the technical problems that conventional melamine aldehyde-based bonding resin has a small dilution ratio of in water at normal temperature, long curing time at high temperature and cannot realize optimal control time for viscosity testing with a Ford cup No. 4 at 20DEG C. The preparation method for the melamine aldehyde-based bonding resin comprises the following steps: firstly, adjusting the pH value of an aqueous solution of an aldehyde compound by adopting analkaline compound, then adding melamine, and carrying out heating while stirring until the solution is colorless, clear and transparent so as to obtain a material I; and cooling the material I, adding an amide compound, and after the amide compound is completely dissolved, carrying out spray drying to obtain the white solid powder of melamine aldehyde-based bonding resin. Thus, the above problemsare well solved, and the melamine aldehyde-based bonding resin can be applied as a bonding agent to production of automobile brake pads.

Description

Technical field [0001] The invention relates to a melamine aldehyde-based adhesive resin and a preparation method thereof. Background technique [0002] Melamine aldehyde-based adhesive resin is a complex, interconnected polymer that can be cured into a transparent, hard, chemical-resistant resin with high moisture resistance, hardness and strength. Melamine aldehyde-based adhesive resins are widely used in plywood, laminated countertops and tabletops, dishwasher safe tableware and automotive surface coatings. The three amino groups in melamine have chemical reaction independence, and the melamine aldehyde-based adhesive resin with uniform molecular weight distribution can be prepared by reacting with aldehyde compounds. [0003] In the prior art, the melamine-formaldehyde-based adhesive resin has a low dilution ratio in water at room temperature. Add a quantitative powder solid resin in a certain amount of water at 20°C, stir at this temperature to promote the dissolution of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/32C08G12/40C08G12/32
CPCC08G12/32C08G12/40C09J161/32
Inventor 闫伟李科君惠银银赵俊飞
Owner 江苏长顺高分子材料研究院有限公司
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