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Polymer polyol preparation method, polymer polyol prepared through the same, and use of polymer polyol

A polyol and polymer technology, applied in the field of slow-rebound polyurethane foam, can solve the problem of less slow-rebound polyurethane foam, and achieve the effects of excellent performance, low resilience and high loss factor

Active Publication Date: 2014-02-26
江苏钟山新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few pop literatures on slow rebound polyurethane foam, and there are few reports in China

Method used

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  • Polymer polyol preparation method, polymer polyol prepared through the same, and use of polymer polyol
  • Polymer polyol preparation method, polymer polyol prepared through the same, and use of polymer polyol
  • Polymer polyol preparation method, polymer polyol prepared through the same, and use of polymer polyol

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] Preparation of polymer polyols:

[0024] method 1.

[0025] Batch method: mix high-efficiency dispersant DP-5000, free radical initiator, basic polyether, chain transfer agent, styrene and acrylonitrile, and add dropwise to the reactor. 50-80 minutes, aging for 1 hour after feeding, degassing under reduced pressure for 1 hour, and finally cooling down and discharging to obtain the polymer polyol of the present invention.

[0026] Method 2.

[0027] Continuous method: Add a certain amount of polymer polyol with target solid content into a reaction kettle with a side outlet equipped with a stirring device, a feeder, and a thermometer, and heat the material to heat up. When the temperature is stable at 120°C, The material is added dropwise at a certain feeding speed, and the material is prepared by mixing basic polyether, styrene, acrylonitrile, chain transfer agent, free radical initiator, and self-made high-efficiency dispersant. The residence time is controlled at 5...

Embodiment 1

[0029] Embodiment 1 (prepared by method 1)

[0030] Stir and mix 52g of high-efficiency dispersant DP-50000, 5.6g of free radical initiator, 392g of basic polyether, 52g of chain transfer agent, 168g of styrene and 72g of acrylonitrile, and add dropwise to the reaction kettle. The adding time is controlled at 50-80 minutes, aging for 1 hour after the dropwise addition is completed, degassing under reduced pressure, and cooling for 1 hour to obtain the polymer polyol of the present invention.

[0031] Product indicators: Product appearance: light yellow to white liquid; hydroxyl value: 147mgKOH / g; moisture: 0.05%; acid value: 0.07mgKOH / g; viscosity: 3000mPa.s / 25℃.

Embodiment 2

[0032] Embodiment 2 (prepared by method 1)

[0033] Stir and mix 28g of high-efficiency dispersant DP-5000, 5.6g of free radical initiator, 392g of basic polyether, 52g of chain transfer agent, 168g of styrene and 72g of acrylonitrile, and add dropwise to the reaction kettle. The adding time is controlled at 50-80 minutes, aging for 1 hour after the dropwise addition is completed, degassing under reduced pressure, and cooling for 1 hour to obtain the polymer polyol of the present invention.

[0034] Product indicators: Product appearance: light yellow to white liquid; hydroxyl value: 151mgKOH / g; moisture: 0.05%; acid value: 0.07mgKOH / g; viscosity: 2770mPa.s / 25℃.

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Abstract

The invention relates to a polymer polyol for low resilience polyurethane foam, wherein a low resilience base polyether and a self-made efficient dispersant are adopted, a novel initiator dimethyl 2,2'-azobis(2-methylpropionate) is selected, and a continuous operation process is performed in the presence of the base polyether and a vinyl monomer to synthesize the low resilience polymer polyol, wherein the solid content of the low resilience polymer polyol is 10-40%, the viscosity is 400-3000 mPa.s / 25 DEG C, and the particle size is moderate and stable. According to the present invention, with application of the polymer polyol to prepare the low resilience polyurethane foam, the operations are simple, the foam hardness is significantly improved, and the mechanical properties of the low resilience foam can be significantly improved; the present invention is the extension of the invention CN1986598A; and the present invention relates to the polymer polyol prepared by using the low resilience polyether of the invention CN1986598A as the base polyether, and discloses a preparation method for the low resilience polymer polyol.

Description

technical field [0001] The invention relates to polymer polyol for polyurethane and its preparation method, which is used for preparing polyurethane foam material, especially slow rebound polyurethane foam. Background technique [0002] Slow rebound polyurethane foam means that after being deformed by external force, the foam does not immediately return to its original shape, but slowly recovers without residual deformation. It is a new type of polyurethane foam product that can be ideally and widely used in medical care, furniture and comfortable leisure products: such as Simmons mattresses, pillows, chair seat cushions and armrests; office supplies such as keyboard pads and mouse pads; Cushions such as seats, beds and wheelchairs in the medical field; seat cushions and handles of bicycles, trainers and other leisure products; slow-rebound foam earplugs; other slow-recovery, soft-touch products. Due to its excellent cushioning, sound insulation, sealing and other special p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/44C08F212/10C08G18/63C08G101/00
Inventor 申宝兵宗红亮张丽君叶丞程增会
Owner 江苏钟山新材料有限公司
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