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Preparation process of polyurethane curing agent

A polyurethane curing agent and preparation technology, applied in packaging, packaging sterilization, etc., can solve the problems of high oxidation rate, many impurities, unfavorable perfect fusion, etc., and achieve the effect of improving the qualified rate

Inactive Publication Date: 2020-04-28
常德艾利特新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a preparation process of a polyurethane curing agent, which solves the problem that during the production and preparation of ordinary polyurethane curing agents, the staff often start the machine directly for production, which leads to more impurities in the initial stage of production. , and no oxygen-free environment was used for preheating during production. The oxidation rate was too high during the production process, which seriously affected the production quality of the product. In addition, when the product was mixed, it was often mixed at a high speed at the initial stage of mixing. The materials are still in a relatively independent state, which is not conducive to the perfect integration in the later stage and affects the quality of the product

Method used

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  • Preparation process of polyurethane curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1: Prepare operating materials: select various raw materials for preparing polyurethane curing agent (1 part of diaminodiphenylmethane, 2 parts of phosphite; 10 parts of ethyl acetate; 20 parts of polyester polyol; 2 parts of antioxidant; 3 parts of diisocyanic acid; 2 parts of methyl borate), and carry out the detection of surface color, state of matter and water content, transfer and sterilize the qualified raw material for standby;

[0031] Step 2: Preheat the equipment: turn on the power switch of the equipment step by step, preheat the equipment in the cold state for 3 minutes, and then fill the equipment with inert gas;

[0032] Step 3: Mix the materials comprehensively: turn on the low speed mode of the stirring motor, and the materials in the stirring tank are first stirred and mixed at a low speed for 2 minutes, then turn on the high speed mode of the stirring motor for 10 minutes, after the materials in the stirring tank are stirred and mixed evenly, turn ...

Embodiment 2

[0038] Step 1: Prepare operating materials: select various raw materials for preparing polyurethane curing agent (25 parts of diaminodiphenylmethane, 3.5 parts of phosphite; 15 parts of ethyl acetate; 60 parts of polyester polyol; 2.5 parts of antioxidant; 5 parts of diisocyanic acid; 3.5 parts of methyl borate), and carry out the detection of surface color, state of matter and water content, transfer and sterilize the qualified raw material for standby;

[0039] Step 2: Preheat the equipment: turn on the power switch of the equipment step by step, preheat the equipment in the cold state for 6 minutes, and then fill the equipment with inert gas;

[0040] Step 3: Mix the materials comprehensively: turn on the low speed mode of the stirring motor, and the materials in the stirring tank are first stirred and mixed at a low speed for 3 minutes, then turn on the high speed mode of the stirring motor for 20 minutes, after the materials in the stirring tank are stirred and mixed evenl...

Embodiment 3

[0046] Step 1: Prepare operating materials: select various raw materials for preparing polyurethane curing agent (50 parts of diaminodiphenylmethane, 5 parts of phosphite; 20 parts of ethyl acetate; 100 parts of polyester polyol; 3 parts of antioxidant; 7 parts of diisocyanic acid; 5 parts of methyl borate), and carry out the detection of surface color, state of matter and water content, transfer and sterilize the qualified raw material for standby;

[0047] Step 2: Preheat the equipment: turn on the power switch of the equipment step by step, preheat the equipment in the cold state for 10 minutes, and then fill the equipment with inert gas;

[0048] Step 3: Mix the materials comprehensively: turn on the low speed mode of the stirring motor, and the materials in the stirring tank are first stirred and mixed at a low speed for 5 minutes, then turn on the high speed mode of the stirring motor for 30 minutes, after the materials in the stirring tank are stirred and mixed evenly, t...

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Abstract

The invention discloses a preparation process of a polyurethane curing agent. The preparation process specifically comprises the following steps: step 1, preparing operation materials, step 2, preheating preparation equipment, step 3, comprehensively mixing the materials, and step 4, temporarily sampling and inspecting. The invention relates to the technical field of polyurethane curing agents. According to the preparation process of the polyurethane curing agent, the step 1 and the step 2 are combined, the worker can perform sufficient disinfection detection of materials before starting the machine to directly produce and preheat the machine for sufficient time, and thus the performances of the production machine in all aspects are optimal and the rejection rate of products is reduced tothe minimum; and the device is filled with inert gas during preheating so that the materials are effectively prevented from reacting with oxygen during preheating of the equipment, the quality of finished products is improved, the materials can be effectively prevented from being effectively isolated from the outside in the packaging and bagging process through sterile packaging in the step 6, andthe percent of pass of the products is increased.

Description

technical field [0001] The invention relates to the technical field of polyurethane curing agents, in particular to a preparation process of polyurethane curing agents. Background technique [0002] The full name of polyurethane is polyurethane, a polymer compound. Polyurethane has two types: polyester type and polyether type. They can be made into polyurethane plastics (mainly foamed plastics), polyurethane fibers (called spandex in China), polyurethane rubber and elastomers. Soft polyurethane mainly has a thermoplastic linear structure, which has better stability, chemical resistance, resilience and mechanical properties than PVC foam materials, and has smaller compression set. Good heat insulation, sound insulation, shock resistance and anti-virus performance. Therefore, it is used as packaging, sound insulation, and filter materials. Rigid PU plastic is light in weight, excellent in sound insulation and heat insulation performance, chemical resistance, good electrical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32C08G18/08B65B55/12B65B61/26
CPCB65B55/12B65B61/26C08G18/08C08G18/3243C08G18/42C08G18/6651
Inventor 袁长林彭勇刘云飞
Owner 常德艾利特新材料科技有限公司