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Polyol composition and its prepared polyurethane rigid foam

A polyol composition and a rigid plastic technology are applied in the field of polyurethane foam, which can solve the problems of large cells of polyurethane rigid foam, poor storage stability of polyol, uneven cell size, etc. The effect of improving storage stability and increasing the number of cells

Active Publication Date: 2022-03-25
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 its prepared polyurethane rigid foam
  • Polyol composition and its prepared polyurethane rigid foam
  • Polyol composition and its prepared polyurethane rigid foam

Examples

Experimental program
Comparison scheme
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 olefin oxide. The specific preparation process is as follows:

[0068] 120g of diethanolamine was added to the reaction kettle, the temperature was raised to 70°C, and then 360g of cardanol glycidyl ether was added dropwise. After the completion of the dropwise addition, the insulation reaction was performed for 3 hours, and the gas in the reaction kettle was replaced with nitrogen, and then 2000g of epoxy resin was added. Butane, and add 2g KOH catalyst, heat up to 130 ℃, after holding the reaction for 5 hours, the temperature is all 50 ℃ and discharging;

[0069] The typical intrinsic 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 of this polyol with cyclopentane, add 100g of this polyol to a glass bottle at room temperatu...

Embodiment 2

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

[0073] 80g of butylamine was added to the reactor, the temperature was raised to 80°C, and then 800g of cardanol glycidyl ether was added dropwise. After the dropwise addition was completed, the reaction was incubated for 2 hours, and the gas in the reactor was replaced with nitrogen, and then 800g of epoxy resin was added. Ethane was added, and 1 g of KOH catalyst was added, and the temperature was raised to 130 °C.

[0074] The typical intrinsic 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 of this polyol with cyclopentane, add 100g of this polyol and 20g of cyclopentane to a glass bottle at room temperature of 25°C, and stir at high speed. The bubbles ...

Embodiment 3

[0077] The present embodiment discloses a polyol I and a preparation method thereof. The polyol I is prepared by reacting cardanol glycidyl ether, dodecylamine and alkylene oxide. The specific preparation process is as follows:

[0078] 200g of dodecylamine was added to the reactor, the temperature was raised to 75°C, and then 800g of cardanol glycidyl ether was added dropwise. After the dropwise addition was completed, the reaction was incubated for 3 hours, and the gas in the reactor was replaced with nitrogen, and then 800g of ring was added. 2g KOH catalyst was added, the temperature was raised to 130°C, and the temperature was lowered to 40°C after 6 hours of reaction.

[0079] The typical intrinsic 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 of this polyol with cyclopentane, add 100g of this polyol and 20g of cyclopentane to a glass bottle at room temperature of 25°C, and...

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Abstract

The invention discloses a polyol composition, which is composed of various polyether polyols and polyol I, wherein the polyol I is a reactant formed by reacting cardanol glycidyl ether with various amines The initiator and oxyalkylene are prepared by addition reaction; the typical characteristic viscosity of polyol I is 1500-3000mPa·s, and the hydroxyl value is 300-450mg KOH / g. The invention also discloses the application of the above-mentioned polyol composition in polyurethane rigid foam plastics and its preparation method. In the present invention, polyol I is prepared with cardanol derivatives as a starting agent due to the longer alkane structure, and has good compatibility with cyclopentanes or compositions as components of blowing agent; by this polyol The foam density difference of the prepared polyurethane rigid foam is reduced, the closed cell rate is high, the comprehensive thermal conductivity is reduced, and the compressive strength and dimensional stability are all improved.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam plastics, and particularly provides a polyol composition and a polyurethane rigid foam plastic prepared therefrom. Background technique [0002] Polyurethane is a class of polymers containing -NHCOO- repeating structural units in the main chain. It is mainly polymerized from isocyanates, polyester polyols, chain extenders and other raw materials. Since polyurethane contains strong polar urethane group, it is insoluble in non-polar group, and has good oil resistance, toughness, abrasion resistance, aging resistance and adhesion, and can be produced with a wide temperature range. Materials such as elastomers, thermoplastic resins, and thermosetting resins. Polyurethane, as a cost-effective organic polymer material, is currently widely used in various fields in real life, and its output and consumption are also increasing year by year. [0003] Polyols as one of the main components genera...

Claims

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Application Information

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Patent Type & Authority Patents(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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