Polyether polyatomic alcohol preparation for subfluoride hard foamed material

A technology of polyether polyol and rigid foam is applied in the field of preparation of polyether polyol for low-fluorine rigid foam, which can solve the problems of expensive preparation of synthetic raw materials, high production cost, complicated production process and the like, and achieve production cost Low cost, environmental protection, easy availability of raw materials

Active Publication Date: 2005-07-27
HANGJIN JINXI CHLOR-ALKALI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is complicated and the preparation of synthetic raw materials is expensive, so the production cost remains high
[0004] my country's former Ministry of Chemical Industry Science and Technology Research Institute used alkyl glucose as the initiator and surfactant as the modifier to make polyether polyols for low-fluorine rigid foams. The amount of CFC-11 was reduced by 50%, but the production process Still more complex and more expensive to produce

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of polyether polyols for low fluorine rigid foam is that 45 parts by weight of starter (sorbitol: monoethanolamine is 61.6: 38.4 by weight), and the catalyst potassium hydroxide weight is 0.3% of the total feed weight , into the high-pressure reactor, the reactor is equipped with a stirring device and an inner coil cooling device. After the feeding is completed, stir and heat up, the temperature is controlled at 90±10°C, 55 parts by weight of propylene oxide are added, and the reaction temperature is 110±10°C. React at a pressure of 0.3 MPa for 5 hours, and after aging for 3 hours, remove moisture in a vacuum. The mixture of disodium hydrogen pyrophosphate and phosphoric acid is used as the neutralizing agent, the time required for the neutralization reaction is 1.5hr, the reaction temperature is 120±10°C, the mixture of disodium hydrogen pyrophosphate and phosphoric acid is used as the neutralizing agent, magnesium hexasilicate After 0.5 hours o...

Embodiment 2

[0024] Example 2 is basically the same as Example 1, except that the starting agent (sucrose: monoethanolamine ratio is 73.7: 26.3) is 21.5 parts, propylene oxide is 78.5 parts, and the reaction pressure is controlled at 0.4Mpa.

[0025] The obtained polyether polyol has a hydroxyl value of 363mg.koh / g and a viscosity of 3800cp / 25°C.

Embodiment 3

[0027] Embodiment three is basically the same as embodiment one, except that the initiator (sucrose: diethanolamine is 53.4: 46.6) 29.7 parts, the addition of propylene oxide is 70.3 parts, and the weight of catalyst potassium hydroxide is 1 / 2 of the total charging amount. 0.4%.

[0028] The obtained polyether polyol has a hydroxyl value of 370 mg.koh / g and a viscosity of 2500 cp / 25°C.

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Abstract

Production of polyether polybasic alcohol for subfluoride hard foaming is carried out by: adding mixture of alditol and alcohol amine with weight ratio 2.03-2.77:1-1.77 into reacting pot with agitator and internal cooling coil pipe as initiator, adding alkali hydroxide 0.1-1wt% as catalyst, heating to 80-100deg.C, polymerizing, adding olefine oxide 2.55-3.65 proportions into reacting pot with reacting pressure 0.2-0.8Mpa and reacting time 3-10hrs, aging for 1.5-3.5hrs with temperature 80-130deg.C, dewatering, neutralizing, taking organic acid solution as neutralizing agent, or taking mixture of sodium hydropyrophosphate and phosphoric acid as neutralizing agent with neutralizing temperature 110-130deg.C for 1.5hrs, adsorptive dewatering, removing ion including K+ and Na+ by hexamagnesium silicate adsorbent, dewatering under vacuum, filtering and filtering impurity. It achieves simple process and material, low viscosity and no environmental protection.

Description

(1) Technical field [0001] The invention relates to a preparation method of polyurethane synthetic material, in particular to a preparation method of polyether polyol for low-fluorine rigid foam. (2) Background technology [0002] Due to its excellent performance, polyurethane rigid foam has been widely used in household refrigerators, freezers, construction industries, etc. CFC-11, a blowing agent widely used in the past, has a destructive effect on the atmospheric ozone layer and is restricted and banned by the Montreal International Convention. [0003] In view of this, in the late 1980s, polyether polyols for low-fluorine rigid foams were developed and sold in Europe, which is characterized by the compounding of various polyether polyols. The process of this method is complicated, and the preparation of synthetic raw materials is expensive, so the production cost remains high. [0004] my country's former Ministry of Chemical Industry Science and Technology Research In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G65/28
Inventor 李德徽鹿志军石锦生张志勇杨树兴葛珍祖跃秋邢德海徐素清徐明艳信洪珍杨丽杰何秀梅王雪松陈静
Owner HANGJIN JINXI CHLOR-ALKALI CHEM CO LTD
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