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Composition capable of reacting with isocyanate and polyurethane material prepared from composition

An isocyanate and composition technology, applied in the field of polymer materials, can solve problems such as poor solubility, uneven density distribution, and unsmooth flow, and achieve the effects of good dimensional stability, accelerated curing speed, and improved production efficiency.

Pending Publication Date: 2021-06-25
HONGBAOLI GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the contrary, if the fluidity is poor, the polyurethane foaming stock solution is prone to blockage and unsmooth flow, which will eventually cause problems such as hollowing, debonding, uneven density distribution, and increased perfusion volume, which directly affect production efficiency, cost and product quality.
[0004] In addition to the control of process costs, the requirements of environmental protection policies are becoming increasingly stringent, and it is urgent to develop alternative technologies for foaming agents. Among them, alkane foaming agents are one of the main technical solutions for environmentally friendly polyurethane foaming systems. The potential value is zero, the greenhouse effect is small, non-toxic, and has minimal impact on the environment, but its solubility in polyether is poor, which has a negative impact on density, foaming efficiency, dimensional stability, etc., thereby limiting The scope of use of alkane blowing agent
[0005] To sum up, the prior art still has the technical problem of incompatibility between rapid mold release and excellent fluidity, and for alkane foaming systems, there is also the problem of poor compatibility between foaming agents and polyether polyols

Method used

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  • Composition capable of reacting with isocyanate and polyurethane material prepared from composition
  • Composition capable of reacting with isocyanate and polyurethane material prepared from composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 181g of 2-aminocyclohexanol and 6.0g of sodium hydroxide into a dry reactor and replace it with nitrogen, raise the temperature and stir, degas under reduced pressure at 100°C and 9kPa for 1 hour, slowly add 1833g of propylene oxide in batches, and carry out For ring polymerization, the feed rate is 10 g / min, the reaction temperature is 100-140° C., and the reaction pressure is 0.3-0.8 MPa. After the reaction is completed, a crude product is obtained. In crude product, add 60g pure water, 1.2g phosphoric acid and 80g sodium carbonate, stir, filter after carrying out vacuum dehydration, obtain 1-1# polyether polyol I, hydroxyl value 150mgKOH / g, 100mPa·s<viscosity (25 °C)<1000mPa·s, the yield is 99.7%.

Embodiment 2

[0029] Add 221g of 2-aminocyclopentanol and 6.0g of sodium hydroxide into a dry reaction kettle and replace it with nitrogen, raise the temperature and stir, degas under reduced pressure at 100°C and 9kPa for 2h, slowly add 321g of ethylene oxide in batches, and then Then slowly add 1464g of propylene oxide in batches for ring-opening polymerization reaction, the feeding rate is 10g / min, the reaction temperature is 100-140°C, the reaction pressure is 0.3-0.8MPa, and the crude product is obtained after the reaction. In crude product, add 60g pure water, 1.2g phosphoric acid and 80g sodium carbonate, stir, filter after carrying out vacuum dehydration, obtain 1-2# polyether polyol I, hydroxyl value 210mgKOH / g, 150mPa·s<viscosity (25 °C)<2000mPa·s, the yield is 99.6%.

Embodiment 3

[0031] Add 270g of 2-aminocyclohexanol and 6.0g of sodium hydroxide into a dry reactor and replace it with nitrogen, raise the temperature and stir, degas under reduced pressure at 100°C and 9kPa for 2 hours, slowly add 1741g of propylene oxide in batches, and carry out For ring polymerization, the feed rate is 10 g / min, the reaction temperature is 100-140° C., and the reaction pressure is 0.3-0.8 MPa. After the reaction is completed, a crude product is obtained. In crude product, add 60g pure water, 1.2g phosphoric acid and 80g sodium carbonate, stir, filter after carrying out vacuum dehydration, obtain 1-3# polyether polyol I, hydroxyl value is 300mgKOH / g, 500mPa·s<viscosity (25 °C) <7000mPa·s, the yield is 99.8%.

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Abstract

The invention firstly discloses a composition capable of reacting with isocyanate, the composition contains polyether polyol I, and the polyether polyol I is prepared by carrying out ring-opening polymerization reaction on 2-amino naphthenic alcohol and oxyalkylene. The invention further discloses a polyurethane material prepared from the composition. The polyether polyol I is polyol containing an aliphatic ring and a tertiary amine structure, the tertiary amine structure enables the polyether polyol to have an autocatalysis function, and rapid curing of the polyurethane foaming stock solution is facilitated. The initial viscosity of the polyether polyol I is low, so that the flowing of the polyurethane foaming stock solution in a complex mold cavity is improved, meanwhile, the adiabaticity, the dimensional stability and the specific strength of the polyurethane foam are further improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a composition capable of reacting with isocyanate and a polyurethane material prepared therefrom. Background technique [0002] Rigid polyurethane foam is an excellent thermal insulation material, which plays an important role in ensuring the energy saving and consumption reduction of refrigerators. As raw material prices and manufacturing costs continue to rise, manufacturers are looking for technical solutions to reduce costs and increase efficiency, and the same is true for refrigerators. At present, the industry usually uses the method of reducing demoulding time to improve production efficiency and reduce cost expenditure. The raw material composition of polyurethane is one of the main factors affecting the demoulding time. Polyurethane is usually prepared by chemical reaction of isocyanate component and polyol component. In order to obtain a faster demoulding...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G18/48C08G18/42C08J9/14C08J9/08C08L75/08
CPCC08G65/2621C08G18/4804C08G18/42C08G18/4018C08J9/141C08J9/146C08J9/144C08J9/08C08J2375/08C08J2203/20C08J2205/10
Inventor 邢益辉芮强傅振华张蒙蒙
Owner HONGBAOLI GRP CO LTD