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A kind of environment-friendly liquid polyurethane curing agent and application method thereof

A technology of liquid polyurethane and its application method, which is applied in the environment-friendly liquid polyurethane curing agent and its application field, can solve the problems of excessive smoke and generation of toxic and irritating gas, and achieve the effect of reducing the pressure on the environment and being convenient to use

Active Publication Date: 2022-02-11
江苏湘园化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the benzene ring and nitrogen-containing residue or other by-products are disposed of by incineration to generate heat, not only will there be a lot of smoke but also toxic and irritating gases will be produced, which is not a good method

Method used

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  • A kind of environment-friendly liquid polyurethane curing agent and application method thereof

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Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: A kind of environment-friendly liquid polyurethane curing agent and its application method

[0020] A method for recycling 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA) by-products, the 3,3'-dichloro-4,4'-diaminodiphenylmethane The by-products are dissolved in polyols to obtain an environmentally friendly liquid curing agent, which is used to cure one component of a solvent-free two-component polyurethane system at room temperature.

[0021] 3,3'-dichloro-4,4'-diaminodiphenylmethane by-product (MOCA by-product) mainly comes from polymers formed during the production process, free of mechanical impurities and liquid by-products. And it does not contain harmful ingredients such as free o-chloroaniline (that is, free amine), and it is odorless. The mass fraction ranges from 20% to 70%, preferably 30% to 60%. This embodiment is specifically 45%.

[0022] Polyols are polyether polyols and small molecule polyols with a functionality of 2 to 3, of which pol...

Embodiment 2

[0049] Embodiment 2: A kind of environment-friendly liquid polyurethane curing agent and its application method

[0050] The formula of the liquid polyurethane curing agent is: 120g of MOCA waste (amine value 414 mgKOH / g), 120g of MOCA by-product (amine value 393 mgKOH / g), 160g of polyoxypropylene glycol PPG-600, and 83 g of catalyst Valikat ZB.

[0051] The solid raw materials were dissolved according to the process conditions of Example 1 to obtain a liquid polyurethane curing agent, the measured moisture content was 0.06%, and the total calculated equivalent weight of amino groups and hydroxyl groups was 176.

Embodiment 3

[0052] Embodiment 3: A kind of environment-friendly liquid polyurethane curing agent and its application method

[0053] The formula of liquid polyurethane curing agent is: MOCA by-product (amine value 416 mgKOH / g) 160 g, polyoxypropylene diol PPG-1000 160 g, polyoxypropylene triol N-303 80 g, catalyst BX-EM23 4 g.

[0054] The solid raw materials were dissolved according to the process conditions of Example 1, and additives were added to obtain a liquid polyurethane curing agent, and the measured moisture content was 0.075%. The total calculated equivalent weight of amino group and hydroxyl group is 173.

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Abstract

An environment-friendly liquid polyurethane curing agent and its application method, the by-products produced in the production process of 3,3'-dichloro-4,4'-diaminodiphenylmethane are dissolved in a polyol solvent system to prepare liquid polyurethane curing agent; the mass fraction of by-products produced in the production process of the 3,3'-dichloro-4,4'-diaminodiphenylmethane is 20-70%; the polyol solvent system has a functionality of 2 to 3 Composed of polyether polyol and small molecule polyol, the mass fraction of polyether polyol in the liquid polyurethane curing agent is 30-80%, and the mass fraction of small molecule polyol is 0-15%. The curing agent prepared by the invention is easy to use, not only reduces the pressure of solid waste on the environment, but also can be used as a curing component of an environment-friendly room temperature curing solvent-free two-component polyurethane material, and the cured polyurethane can meet the requirements of specific use conditions. The requirements for physical properties are in line with today's development concept of green environmental protection and comprehensive utilization.

Description

technical field [0001] The invention belongs to the technical field of special chemicals and fine chemicals, relates to an environment-friendly liquid polyurethane curing agent and its application method, in particular to a method using 3,3'-dichloro-4,4'-diaminodiphenylmethane ( The environment-friendly liquid polyurethane curing agent prepared by MOCA) by-product and its application method. Background technique [0002] At present, environmental protection is more and more valued by the society, and environmental protection is beneficial to people's health and sustainable development of society. my country's monitoring and management of the site selection of chemical companies and the treatment of three wastes is becoming more and more stringent. Not only the development of renewable biological resources has become a research hotspot, but also the recycling of by-products and defective products in the petrochemical industry is also one of the hotspots that enterprises pay...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/10C08G18/66C08G18/48C08G18/32C08L75/08C09D175/08C09J175/08C09J11/04
CPCC08G18/10C08G18/6674C08G18/6685C08G18/6677C08L75/08C09D175/08C09J175/08C09J11/04C08K2201/011C08K2003/265C08G18/3814C08G18/4854C08G18/3206C08G18/4812C08G18/4825C08G18/4829C08G18/4837C08K3/26
Inventor 周建刘益军王静怡
Owner 江苏湘园化工有限公司
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