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Beta-polyether amine, synthesis method thereof and aliphatic polyurea coating containing beta-polyether amine

A synthesis method and polyetheramine technology, which are applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of inability to use manual work, high input cost, and high input cost of raw materials, and ensure the opening time and construction. Simple process, good leveling effect

Pending Publication Date: 2022-03-22
JIANGSU ZHAOHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In actual production and application, polyetheramine reacts with isocyanate compounds to produce polyurea coatings. However, due to the high chemical activity of terminal amino groups in traditional polyetheramines, the pot life is short, usually only a few dozen seconds (at 25°C), so manual or conventional spraying equipment cannot be used during construction, and special spraying equipment is required for spraying. The equipment investment cost is high, which greatly limits the application of polyurea coating
[0004] For example, in the Chinese invention patent application CN103131002A (a polyether amine and its preparation method), ketone, aldehyde or acid anhydride is used as reactant to react with primary amine to generate amine compound, and then primary amine, active hydroxyl and alkylene oxide The monomer is anionic polymerized, and finally the polyetheramine containing the primary amino group is obtained. The primary amino group in the polyetheramine is located at the end of the molecular chain and belongs to the terminal amino group. Inconvenient to operate
[0005] In the prior art, aspartic acid compounds can also be used as raw materials to synthesize polyetheramines with aspartic acid structure, and the amino group is located on the secondary carbon atom. The steric hindrance effect can greatly reduce the reactivity of the amino group, and the pot life of the polyurea coating can reach 2 hours (at 25°C). At this time, conventional spraying equipment or even manual spraying can be used to achieve diversified construction. technology, but the price of aspartic acid compounds is expensive, the input cost of raw materials is high, and the synthesis process is complicated

Method used

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  • Beta-polyether amine, synthesis method thereof and aliphatic polyurea coating containing beta-polyether amine
  • Beta-polyether amine, synthesis method thereof and aliphatic polyurea coating containing beta-polyether amine
  • Beta-polyether amine, synthesis method thereof and aliphatic polyurea coating containing beta-polyether amine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preparation of β-polyetheramine:

[0046] (1) Etherification

[0047] Choose butanone alcohol as the raw material, add butanone alcohol and concentrated sulfuric acid into the reaction kettle, and use concentrated sulfuric acid as the catalyst in a sufficient amount. After mixing evenly, let it rest for more than 48 hours, and then heat it to 140-150°C, preferably 140°C. In the actual operation, the temperature is controlled to fluctuate within the range of ±2°C. After the reaction is completed, the reaction product is sequentially purified by alkali washing, water washing and distillation;

[0048] Among them, in the alkali washing step, sodium carbonate or sodium hydroxide is used to react at room temperature, and neutralize the acid substances in the reaction product until the pH of the reaction product=7; in the water washing step, the aforementioned alkali washing step The generated salts and other impurities are removed; the water in the washed reaction product i...

Embodiment 2

[0055] Aliphatic polyurea coating S1 was prepared.

[0056] (1) Component A, in parts by mass, includes the following components:

[0057] 467 parts of diphenylmethane diisocyanate (MDI 50, purchased from Yantai Wanhua)

[0058] 452 parts of polyether polyols (Tdiol 2000, purchased from Tianjin Petrochemical);

[0059] Mix MDI50 and Tdiol 2000 uniformly at first, carry out pre-polymerization, and react for 4 hours at 85°C.

[0060] (2) B component, in parts by mass, includes the following components:

[0061]

[0062] Put the above components into the reaction kettle, vacuumize, mix evenly, heat to 90-100°C, and react for 2 hours to obtain component B.

[0063] (3) Preparation of aliphatic polyurea coating

[0064] Mix the above-mentioned components A and B according to the mass ratio of 1:1 to obtain the aliphatic polyurea coating, which is marked as S1.

[0065] At 25°C, the aliphatic polyurea coating S1 was tested for performance. The pot life was 20 minutes, the vi...

Embodiment 3

[0068] Aliphatic polyurea coating S2 was prepared.

[0069] (1) Component A, in parts by mass, includes the following components:

[0070] Diphenylmethane diisocyanate (MDI 100) 220 parts

[0071] Diphenylmethane diisocyanate (MDI 50) 220 parts

[0072] 426 parts of polyether polyol (Tdiol 2000);

[0073] The above-mentioned components were firstly mixed uniformly, pre-polymerized, and reacted at 85°C for 4 hours.

[0074] (2) B component, in parts by mass, includes the following components:

[0075]

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Abstract

The invention discloses beta-polyetheramine and a synthesis method thereof and an aliphatic polyurea coating containing the beta-polyetheramine, and belongs to the technical field of chemical product production, beta-polyetheramine is prepared through a ketone alcohol compound, oxygen atoms and secondary carbon atoms in the ketone alcohol compound jointly form carbonyl, the carbonyl forms oxime through a chemical reaction, the oxime is reduced to form amine, and the amine is converted into beta-polyetheramine. In the finally obtained beta-polyether amine, the amino group is primary amine and is located on a beta carbon atom, the activity of the amino group is influenced by an adjacent methyl group, and the activity is weakened, so that the finally obtained aliphatic polyurea coating is relatively long in working life, diversified construction processes can be realized, and the construction process is simple.

Description

technical field [0001] The invention belongs to the technical field of chemical product production, and in particular relates to a β-polyether amine, a synthesis method thereof and an aliphatic polyurea coating containing the same. Background technique [0002] The traditional polyether amine is a type of polymer with a polyether structure as the main chain and an active functional group amino group at the end of the main chain, that is, the amino group is located on the primary carbon atom, and is widely used in the field of chemical coatings. [0003] In actual production and application, polyetheramine reacts with isocyanate compounds to produce polyurea coatings. However, due to the high chemical activity of terminal amino groups in traditional polyetheramines, the pot life is short, usually only a few dozen seconds (at 25°C), so manual or conventional spraying equipment cannot be used during construction, and special spraying equipment is required for spraying. The high...

Claims

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Application Information

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IPC IPC(8): C07C217/08C07C213/02C07C249/08C07C251/38C07C45/64C07C49/175C08G18/66C08G18/48C08G18/58C08G18/32
CPCC07C217/08C07C213/02C07C249/08C07C45/64C08G18/6685C08G18/4045C08G18/48C08G18/58C08G18/3228C07C49/175C07C251/38
Inventor 王宏辉王若愚
Owner JIANGSU ZHAOHUI CHEM
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