Rosin polyether glycol used for flame-retardant hard polyurethane foaming plastic and preparation method thereof

A technology of rigid polyurethane and foam plastics, applied in the chemical modification of natural resins, etc., can solve the problems of foaming equipment such as corrosion, instability, and high price, and achieve the effects of wide application prospects, good compressive strength, and high thermal stability

Active Publication Date: 2010-04-14
江苏真的旺节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the homopolymer and the copolymer of polyethylene, vinylidene chloride are unstable, emit poisonous HCl gas in foaming process, have corrosivity to foaming equipment; Acrylonitrile mixed monomers are copolymerized to prepare flame-retardant polyols. The polyurethane foams produced by it have certain flame-retardant properties, but tribromostyrene is difficult to synthesize, expensive, and contains halogens.
Patent 200710021640.0 discloses rosin polyether polyol for rigid polyurethane foam and its preparation method, including the structure of rosin polyether polyol and the preparation method of rosin-based rigid polyurethane foam; but this polyol does not contain flame retardant Nitrogen, the oxygen index of the rigid polyurethane foam made is not high, and the flame retardant effect is relatively general

Method used

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  • Rosin polyether glycol used for flame-retardant hard polyurethane foaming plastic and preparation method thereof
  • Rosin polyether glycol used for flame-retardant hard polyurethane foaming plastic and preparation method thereof
  • Rosin polyether glycol used for flame-retardant hard polyurethane foaming plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 400 parts of maleopimaric acid, 150 parts of ethylenediamine, and 5 parts of p-toluenesulfonic acid into a pressure-resistant reactor, mix and heat up and stir, at 180°C, keep the pressure at 0.4Mpa, react for 6 hours, cool down to 100°C, add 1 part KOH, evacuated N 2 The gas is replaced 3 times, the temperature is raised to 150°C, and 500 parts of ethylene oxide and 500 parts of propylene oxide are alternately circulated in equal amounts, that is, a part of ethylene oxide is first passed in for a period of time, and then the same amount of ethylene oxide is passed in. The quality of propylene oxide is passed in alternately like this until all the reactions are completed. React at a reaction temperature of 150°C and a reaction pressure of 1.0 MPa. When ethylene oxide and propylene oxide are circulated in an equal amount, after passing through the epoxide each time, the reaction is constant for 60 minutes. After passing through the epoxide, the reaction ends, stop ...

Embodiment 2

[0038] Add 450 parts of maleopimaric acid, 200 parts of ethylenediamine, and 2 parts of sulfuric acid into a pressure-resistant reactor, mix and heat up and stir, at 170°C, keep the pressure at 0.8Mpa, react for 4 hours, cool down to 110°C, and add 1 part of KOH , vacuum N 2 The gas was replaced 3 times, the temperature was raised to 150°C, and 300 parts of ethylene oxide and 400 parts of propylene oxide were circulated in equal amounts. React at a reaction temperature of 140°C and a reaction pressure of 0.8MP. When ethylene oxide and propylene oxide are circulated in an equal amount, after passing through the epoxide each time, the reaction is constant for 60 minutes. After passing through the epoxide, the reaction ends. Stop responding. emptying. At 120° C. / 10 mm Hg, depressurize and evacuate for 30 minutes to obtain a flame-retardant rosin polyether polyol. Then obtain combined polyol according to the preparation formula of rigid polyurethane foam in Table 1, stir at h...

Embodiment 3

[0040] Add 480 parts of maleopimaric anhydride, 250 parts of urea, and 4 parts of phosphoric acid into a pressure-resistant reactor, mix and heat up and stir, at 160°C, keep the pressure at 0.3Mpa, react for 7 hours, cool down to 120°C, and add 3 parts of potassium methylate, Vacuum N 2 The gas was replaced three times, the temperature was raised to 140°C, and 100 parts of ethylene oxide and 300 parts of propylene oxide were circulated in equal amounts. React at a reaction temperature of 140°C and a reaction pressure of 0.5MP. When ethylene oxide and propylene oxide are circulated in an equal amount, after passing through the epoxide each time, the reaction is constant for 60 minutes. After passing through the epoxide, the reaction ends. Stop responding. emptying. At 120° C. / 10 mm Hg, depressurize and evacuate for 30 minutes to obtain a flame-retardant rosin polyether polyol. Then obtain combined polyol according to the preparation formula of rigid polyurethane foam in Ta...

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Abstract

The invention discloses a rosin polyether glycol used for flame-retardant hard polyurethane foaming plastic, with the structural formula that: R is n which equals to 1 to 10. A preparation method of the rosin polyether glycol comprises the following steps: adding rosin dibasic acid or tribasic acid, alkane diamine and acid catalyst in a pressure-resistant reaction kettle, mixing and stirring with temperature raised, reacting for 3 to 8 hours, reducing the temperature to 100 to 120 DEG C, adding base catalyst, keeping the temperature at 130 to 150 DEG C under the vacuumization and anaerobic condition, dividing oxirane and epoxypropane into a plurality of times, conducting alternate circular reaction according to the sequence of firstly introducing the oxirane and then introducing the epoxypropane, and conducting reduced pressure distillation after that to obtain a flame-retardant rosin polyether glycol. As the rosin polyether glycol contains rosin phenanthrene ring rigid structure, and contains a certain amount of flame-retardant nitrogen elements, when being used in hard polyurethane foaming plastic, the rosin polyether glycol has higher thermal stability and flame retardance, and good compression strength, with 28 to 30 percent the oxygen index, thus being used in building, heat insulation and a plurality of special fields.

Description

technical field [0001] The invention relates to raw materials for rosin-based flame-retardant rigid polyurethane foam plastics and its preparation process, in particular to the structure and preparation method of a rosin polyether polyol, and the use of flame-retardant rosin polyether polyol for preparing rigid polyurethane foam plastic method. Background technique [0002] Polyurethane foam is currently the best thermal insulation material in the world. Because developed countries such as Europe and the United States attach great importance to building energy conservation, polyurethane rigid foam has been widely used in roofs, walls, ceilings, floors, doors and windows of buildings in these countries. Wait. However, polyurethane foam has a low density and a large specific surface area, which makes it easier to burn than non-foam materials, and produces a lot of toxic fumes when burned and decomposed. It will burn and decompose in case of fire. When burning, it releases a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26C09F1/04C08G18/50C08G101/00
Inventor 周永红张猛胡立红李书龙刘红军
Owner 江苏真的旺节能科技有限公司
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