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Preparation method of polyether polyol cross-coupling agent

An alcohol cross-linking agent and polyether multi-component technology, applied in ether preparation, alkylene oxide preparation ether, organic chemistry, etc., can solve the problems of low activity, complicated reaction process, unsatisfactory mechanical properties and dimensional stability, etc., to achieve High activity, simplification of the reaction process, and the effect of reducing the refining process

Active Publication Date: 2011-05-04
CHINA PETROCHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the reaction process of preparing polyether polyols in the prior art is complicated, after the polymerization reaction must be post-treated to remove metal ions, and the prepared polyether polyols have low activity when used to prepare polyurethane foams, and the finished products The mechanical properties and dimensional stability are not ideal enough, and a new preparation method of polyether polyol crosslinking agent is provided

Method used

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  • Preparation method of polyether polyol cross-coupling agent

Examples

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Comparison scheme
Effect test

Embodiment 1

[0011] Add 250 grams of urea, 250 grams of sorbitol, and 11 grams of dimethylethanolamine into the reactor, replace with nitrogen, replace the air in the kettle, heat up, and start adding 920 grams of propylene oxide when the temperature in the kettle reaches 80°C. Heat, turn on the coil cooling water to cool down, the reaction temperature is controlled at 120°C, the pressure is 0.4MPa, and the feeding time is controlled to complete within 6 hours. After the propylene oxide was added, the aging was continued for 3 hours. After degassing for 0.5 hour, the material was pressed out with nitrogen to obtain 1400 g of finished product. The hydroxyl value was 770 mgKOH / g, the viscosity was 5300 mPa·s / 25°C, and the water content was 0.02% by weight.

Embodiment 2～9

[0013] According to the method steps of [Example 1], only the reaction raw materials, catalysts, and reaction conditions are different, as shown in Table 1.

Embodiment 10

[0015] The rigid polyurethane foam was prepared by using the rigid foam crosslinking agent polyether polyol obtained in [Examples 1-9], and its physical properties were tested.

[0016] 10 grams of rigid foam crosslinking agent polyether polyols, 90 grams of rigid foam polyether GR-835G (Shanghai Gaoqiao Petrochemical Company), 2 grams of foam stabilizer B-8454 (Germany Goldschmidt Company), 0.5 gram of dimethylcyclohexylamine Polycat 8 (American Gas Company), 0.8 gram of Debaco 33-LV (American Gas Company), 2 gram of water, 25 gram of physical blowing agent HCFC-141B (Zibo Luxuan Works Trading Co., Ltd.) to prepare resin A component.

[0017] Add crude isocyanate MDI (44V20L, Bayer company) into A component, its amount is 1.05 times of active hydrogen per mole in A component. Stir vigorously for 10 seconds, then pour into cartons 25 cm wide by 25 cm long by 18 cm high. Measure the non-stick time from the foaming milky time to the beginning of the gel drawing time, and final...

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Abstract

The invention relates to a preparation method of a polyether polyol cross-coupling agent, which is mainly used for solving the problems that the reaction procedure of preparing the polyether polyol is complicated, post treatment is necessary for removing metal ions after a polymerization reaction and the prepared polyether polyol has low activity and poor mechanical property and size stability when used for preparing polyurethane foam plastics. The polyether polyol cross-coupling agent is prepared by using urea and polyol as a co-initializing agent and epoxypropane as a polymerization monomer through carrying out catalytic reaction on reaction raw materials and a catalyst under the conditions that the mol ratio of the urea to the polyol to the epoxypropane is (1-20):1:(1-40), the reaction temperature is 60-180 DEG C and the reaction pressure is less than 0.6MPa, wherein the polyol is selected from at least one of cane sugar, sorbierite, alpha-methyl glucoside or mannitol, the catalyst is selected from at least one of trimethylamine, dimethylamine, triethylamine, dimethylethanolamine, dimethylisopropanolamine or N,N'-dimethyl-1,3-propanediamine, and the consumption of the catalyst accounts for 0.1-5 percent by weight of the raw materials. The technical scheme provided by the invention better solves the problems and can be used in the industrial production of the polyether polyol cross-coupling agent.

Description

technical field [0001] The invention relates to a preparation method of a polyether polyol crosslinking agent. Background technique [0002] Polyether polyol is the main raw material for the production of rigid polyurethane foam, which is very effective in improving the mechanical performance, strength and dimensional stability of the product. It is often used as a structural crosslinking agent and co-catalyst in composite materials. Special medicine for shrinkage and spray paint flow problems. [0003] The preparation method of the polyether polyol is prepared by polymerizing the initiator and propylene oxide under the action of certain temperature, pressure and catalyst. Document CN95110005.X discloses a kind of preparation method of polyether polyol, and it is to adopt urea as starter, under the catalysis of basic catalyst KOH, carry out polymerization with propylene oxide to obtain intermediate product, then this intermediate product is mixed with sucrose or Sorbitol i...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G18/48C07C43/11C07C41/03C08G101/00
Inventor 罗宏顾良民陈凤秋孙祥蒋晓群宣理静
Owner CHINA PETROCHEMICAL CORP
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