Polyol composition and polyurethane hard foam plastic prepared therefrom

A polyol composition and a rigid plastic technology, applied in the field of polyurethane foam plastics, can solve the problems of large cells of polyurethane rigid foam, poor storage stability of polyols, and high cost of epoxy reaction, and reduce the cell size of the foam and improve the Storage stability, easy-to-obtain results

Active Publication Date: 2018-12-07
HAIER SMART HOME CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cyclopentane is a non-polar substance, and has poor compatibility with polyols. Cyclopentane is easy to phase-separate from the foaming material, and polyols have poor storage stability and easy delamination. At the same time, the prepared polyurethane is hard. The quality foam has large cells and uneven cell size, which leads to the disadvantages of high thermal conductivity and general comprehensive performance.
[0005] Therefore, there are various means for modifying polyols, such as patent CN105992784A, which discloses that a cardanol-modified epoxy polyol can be used to form a polyurethane resin system; the polyurethane A resin system comprising a first cardanol component and an isocyanate-reactive component of the cardanol-modified epoxy polyol, and an isocyanate component comprising at least one polyisocyanate; the cardanol-modified Epoxy polyols are the reaction products of epoxy components and epoxy reactive components at a ratio of epoxy groups to epoxy reactive groups of 1:0.95 to 1:5, but the epoxy reaction cost is high, Complex process

Method used

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  • Polyol composition and polyurethane hard foam plastic prepared therefrom
  • Polyol composition and polyurethane hard foam plastic prepared therefrom
  • Polyol composition and polyurethane hard foam plastic prepared therefrom

Examples

Experimental program
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Effect test

Embodiment 1

[0067] This embodiment discloses a polyol I and a preparation method thereof. The polyol I is prepared by reacting cardanol glycidyl ether, diethanolamine, and oxyalkylene. The specific preparation process is as follows:

[0068] Add 120g of diethanolamine to the reaction kettle, raise the temperature to 70°C, then add 360g of cardanol glycidyl ether dropwise, after the dropwise addition is completed, keep warm for 3 hours, replace the gas in the reaction kettle with nitrogen, and then add 2000g of epoxy Butane, and add 2g KOH catalyst, raise the temperature to 130°C, keep the temperature for 5 hours, then cool down to 50°C and discharge;

[0069] The typical characteristic viscosity of the prepared polyol I is 1600-2100 mPa·s, and the hydroxyl value is 320-360 mg KOH / g.

[0070] In order to verify the compatibility between this polyol and cyclopentane, add 100g of this polyol into a glass bottle at room temperature of 20°C, then add 20g of cyclopentane, and stir at a high spe...

Embodiment 2

[0072] This embodiment discloses a polyol I and a preparation method thereof. The polyol I is prepared by reacting cardanol glycidyl ether, butylamine, and oxyalkylene. The specific preparation process is as follows:

[0073] Add 80g of butylamine into the reaction kettle, raise the temperature to 80°C, then add 800g of cardanol glycidyl ether dropwise, after the dropwise addition is completed, keep warm for 2 hours, replace the gas in the reaction kettle with nitrogen, and then add 800g of epoxy ethane, and 1g of KOH catalyst was added, the temperature was raised to 130°C, and after 6 hours of heat preservation reaction, the temperature was lowered to 40°C and the material was discharged.

[0074] The typical characteristic viscosity of the prepared polyol I is 1500-1800 mPa·s, and the hydroxyl value is 300-340 mg KOH / g.

[0075] In order to verify the compatibility between this polyol and cyclopentane, add 100g of this polyol into a glass bottle at room temperature 25°C, the...

Embodiment 3

[0077] This embodiment discloses a polyol I and a preparation method thereof. The polyol I is prepared by reacting cardanol glycidyl ether, laurylamine, and oxyalkylene. The specific preparation process is as follows:

[0078] Add 200g of dodecylamine into the reaction kettle, raise the temperature to 75°C, then add 800g of cardanol glycidyl ether dropwise, after the dropwise addition is completed, keep warm for 3 hours, replace the gas in the reaction kettle with nitrogen, and then add 800g of ring Oxyethane, and 2g KOH catalyst was added, the temperature was raised to 130°C, and after 6 hours of heat preservation reaction, the temperature was lowered to 40°C and the material was discharged.

[0079] The typical characteristic viscosity of the prepared polyol I is 1700-1900 mPa·s, and the hydroxyl value is 310-340 mg KOH / g.

[0080] In order to verify the compatibility between this polyol and cyclopentane, add 100g of this polyol into a glass bottle at room temperature 25°C, ...

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Abstract

The invention discloses a polyol composition composed of a plurality of polyether polyols and a polyol I, wherein the polyol I is prepared through an addition reaction with an olefin oxide by using areaction product, generated through a reaction of cardanol glycidyl ether with a plurality of amines, as an initiator, wherein the typical characteristic viscosity of the polyol I is 1500-3000 mPa*s,and hydroxyl value is 300-450 mg(KOH) / g. The invention also discloses an application of the polyol composition in polyurethane hard foam plastic and a preparation method thereof. In the invention, thepolyol I, prepared with the cardanol derivative being an initiator, has a long alkane structure, so that the polyol I has excellent compatibility with a component in which cyclopentane or a composition serves as a foamer. The polyurethane hard foam prepared from the polyol is reduced in foam density difference, is high in closed-pore ratio, is reduced in comprehensive heat-conductive coefficient,and is improved in compression strength and dimensional stability.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam plastics, and in particular provides a polyol composition and polyurethane rigid foam plastics prepared therefrom. Background technique [0002] Polyurethane is a kind of polymer whose main chain contains -NHCOO- repeating structural units, and is mainly polymerized by isocyanate, polyester polyol, chain extender and other raw materials. Since polyurethane contains strong polar carbamate groups, it is insoluble in non-polar groups, and has good oil resistance, toughness, wear resistance, aging resistance and adhesion, and can be prepared with a wide temperature range. Materials such as elastomers, thermoplastic resins, and thermosetting resins. Polyurethane, as an organic polymer material with high cost performance, is widely used in various fields in real life at present, and its output and consumption are also increasing year by year. [0003] As one of the main components, polyols g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08G18/48C08G18/50C08G18/76C08G18/79C08G65/26
CPCC08G18/482C08G18/5024C08G18/5027C08G18/5033C08G18/7671C08G18/794C08G65/2621C08G65/2624C08G65/2627C08J9/0061C08J9/141C08J9/144C08J9/146C08J9/149C08J2483/04C08J2205/10C08J2205/052C08J2203/182C08J2203/142C08J2203/14C08J2375/08
Inventor 刘站站李鹏
Owner HAIER SMART HOME CO LTD
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