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4,4-diaminodiphenyl methane polyether and preparation method thereof

A technology of diaminodiphenylmethane and polyether, which is applied in the field of 4,4-diaminodiphenylmethane polyether and its preparation, can solve the problems of complex preparation process, short validity period and high chroma, and achieve the preparation method Simple, good follow-up application, highly reactive effect

Inactive Publication Date: 2017-12-01
于天荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the polyurethane products in the related art have high thermal conductivity, poor thermal insulation performance, poor moisture-proof and waterproof performance, low density, large cells, poor deformation resistance, easy to crack, and cannot be kept stable for a long time; 4,4- in the related art Diaminodiphenylmethane polyether product has too high viscosity, which is not suitable for mixing with other materials in subsequent use, and the preparation process is complicated, the production efficiency is low, and there are many side reactions, resulting in the obtained 4,4-diaminodiphenyl Methane polyether products have high hydroxyl value and high chroma, which will affect the subsequent use effect
In addition, 4,4-diaminodiphenylmethane polyether products in the related art are prone to aging and denaturation, have a short validity period, and cannot maintain performance stably for a long time

Method used

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  • 4,4-diaminodiphenyl methane polyether and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] A preparation method of 4,4-diaminodiphenylmethane polyether, comprising:

[0084] 1. The dosage of each raw material is shown in Table 1:

[0085] Table 1 The amount of each raw material used in the preparation method of 4,4-diaminodiphenylmethane polyether in Example 1 of the present invention

[0086]

[0087]

[0088] 2. Process flow:

[0089] 1. Check:

[0090] The kettle is clean, the reaction kettle, external circulation pump and all valves and pipelines of the system have no leakage, the vacuum pump is running normally, and the vacuum degree is above -0.098MPa, such as -0.099MPa, the lower the better. There is no pure material produced in the previous batch in the reactor and pipeline.

[0091] 2. Feeding:

[0092] Throw in MDA.

[0093] 3. Add KOH and antioxidant:

[0094] Add KOH and antioxidant T501 according to the amount of feed, which can be pumped or poured directly. After adding KOH, install the blind plate and replace it with negative pressu...

Embodiment 2

[0106] A preparation method of 4,4-diaminodiphenylmethane polyether, comprising:

[0107] 1. The dosage of each raw material is shown in Table 2:

[0108] Table 2 The amount of each raw material used in the preparation method of 4,4-diaminodiphenylmethane polyether in Example 2 of the present invention

[0109]

[0110]

[0111] 2. Process flow:

[0112] 1. Check:

[0113] The kettle is clean, the reaction kettle, external circulation pump and all valves and pipelines of the system have no leakage, the vacuum pump is running normally, and the vacuum degree is above -0.098MPa, such as -0.099MPa, the lower the better. There is no pure material produced in the previous batch in the reactor and pipeline.

[0114] 2. Feeding:

[0115] Throw in MDA.

[0116] 3. Add KOH and antioxidant:

[0117] Add KOH and antioxidant T501 according to the amount of feed, which can be pumped or poured directly. After adding KOH, install the blind plate and replace it with negative pressure...

Embodiment 3

[0129] A preparation method of 4,4-diaminodiphenylmethane polyether, comprising:

[0130] 1. The dosage of each raw material is shown in Table 3:

[0131] Table 3 The amount of each raw material used in the preparation method of 4,4-diaminodiphenylmethane polyether in Example 3 of the present invention

[0132]

[0133]

[0134] 2. Process flow:

[0135] 1. Check:

[0136] The kettle is clean, the reaction kettle, external circulation pump and all valves and pipelines of the system have no leakage, the vacuum pump is running normally, and the vacuum degree is above -0.098MPa, such as -0.099MPa, the lower the better. There is no pure material produced in the previous batch in the reactor and pipeline.

[0137] 2. Feeding:

[0138] Throw in MDA.

[0139] 3. Add KOH and antioxidant:

[0140] Add KOH and antioxidant T501 according to the amount of feed, which can be pumped or poured directly. After adding KOH, install the blind plate and replace it with negative pressu...

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Abstract

The invention provides 4,4-diaminodiphenyl methane polyether and a preparation method thereof. The preparation method of 4,4-diaminodiphenyl methane polyether is simple in process and spends a short time. The preparation method comprises the steps of enabling 4,4-diaminodiphenyl methane to react with alkyleneoxide, adding an antioxidant, and carrying out ripening, degassing and neutralization, so as to obtain the 4,4-diaminodiphenyl methane polyether product. The 4,4-diaminodiphenyl methane polyether product synthesized by virtue of a specific process is low in hydroxyl value, viscosity and chromaticity and high in reaction activity, does not contain water, can remain uniform and stable for a long time, can be well applied to subsequent use and can be well mixed with other materials.

Description

technical field [0001] The invention relates to the technical field of functional polymers, in particular to a 4,4-diaminodiphenylmethane polyether and a preparation method thereof. Background technique [0002] Polyether products are mainly used to prepare rigid polyurethane materials, which are widely used in refrigerators, freezers, refrigerated trucks, heat insulation boards, pipe insulation and other fields. The prepared product has low thermal conductivity and good dimensional stability, and is also an important raw material for preparing composite polyether. [0003] However, the polyurethane products in the related art have high thermal conductivity, poor thermal insulation performance, poor moisture-proof and waterproof performance, low density, large cells, poor deformation resistance, easy to crack, and cannot be kept stable for a long time; 4,4- in the related art The product viscosity of diaminodiphenylmethane polyether is too high, which is not suitable for mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26
CPCC08G65/2627C08G2650/50
Inventor 于天荣张海菊
Owner 于天荣
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