Preparation method for flexible foam polyether polyol for low-density sponge

A polyether polyol and low-density technology is applied in the field of preparation of soft-foam polyether polyol for low-density sponges, which can solve the problems of poor performance, no obvious breakthrough, and inability to realize high molecular weight special polyether polymerization, and achieves Narrow molecular weight distribution, excellent operating latitude, low unsaturation effect

Inactive Publication Date: 2015-03-11
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-molecular-weight polyether polyols prepared by traditional KOH catalysts have poor performance due to side reactions in the polymerization process. In recent years, low-unsaturation, three-functional high-molecular-weight propylene oxide polyols prepared by bimetallic catalytic systems Polyols can meet the sponge needs of conventional customers, but there is no obvious breakthrough for low-density, high-quality, high-resilience products that require high performance in terms of operating latitude, dimensional stability, and elasticity.
[0003] Solid sorbitol is used as a high-functionality starter, and the prepared rigid polyether polyol can effectively improve the fineness of the cells and improve the dimensional stability of the foam. However, the polyether polyol suitable for sponge products must also have high molecular weight, lower molecular weight distribution, better porosity, but solid sorbitol used alone as a starter to prepare high molecular weight flexible polyether products has not been reported, while the traditional process can not achieve high molecular weight, low Polymerization of saturated specialty polyethers

Method used

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  • Preparation method for flexible foam polyether polyol for low-density sponge
  • Preparation method for flexible foam polyether polyol for low-density sponge
  • Preparation method for flexible foam polyether polyol for low-density sponge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In a 2L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 182g of solid sorbitol, 48g of 1,3-dimethylimidazoline Ketone, after stirring evenly, add 3.6g KOH, replace nitrogen 5 times, heat up to 70°C, then add 48g propylene oxide to polymerize, stir and react for 1.5h, remove the solvent 1,3-dimethyl in vacuum at -0.10MPa Imidazolinone, then continue to add 970g of propylene oxide in batches, control the reaction temperature at 105°C, and the pressure at 0.16MPa. After the reaction is completed, lower the temperature to 85°C, add 7.02g of phosphoric acid and 36g of distilled water, stir the reaction for 45min, and then add 1.2g Magnesium aluminum silicate, stirred for 30 minutes, dehydrated in vacuum at -0.10MPa for 2 hours, filtered to obtain the intermediate polyether polyol, and set aside.

[0025] Add 240g of intermediate polyether polyol and 0.1...

Embodiment 2

[0027] In a 2L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 182g of solid sorbitol, 40g of 1,3-dimethylimidazoline Ketone, 20g N, N-dimethylformamide, after stirring evenly, add 3gKOH, replace nitrogen 3 times, heat up to 80°C, then add 50g propylene oxide to polymerize, stir and react for 1.5h, then vacuum at -0.10MPa Remove the solvent 1,3-dimethylimidazolinone and N,N-dimethylformamide, then continue to add 768g of propylene oxide in batches, control the reaction temperature at 110°C, and the pressure at 0.18MPa. After the reaction is completed, cool down to 85°C, add 5.85g phosphoric acid and 30g distilled water, stir and react for 45min, then add 1g magnesium silicate and 1.0g aluminum silicate, stir for 30min, vacuum dehydrate at -0.10MPa for 2h, filter to obtain the intermediate polyether polyol, wait use.

[0028] Add 200g of intermediate poly...

Embodiment 3

[0030] In a 2L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 182g of solid sorbitol, 40g of 1,3-dimethylimidazoline Ketone, 24g dimethyl sulfoxide, after stirring evenly, add 2.4gKOH, replace with nitrogen 3 times, heat up to 90°C, then add 48g propylene oxide to polymerize, stir for 1.5h, then vacuum remove at -0.10MPa Solvent 1,3-dimethylimidazolinone, N,N-dimethylformamide, and then continue to add 570g of propylene oxide in batches, control the reaction temperature to 120°C, and the pressure to 0.20MPa. After the reaction is completed, cool down to 85°C , add 4.68g of phosphoric acid and 24g of distilled water, stir for 45min, then add 2.4g of aluminum magnesium silicate, stir for 30min, vacuum dehydrate at -0.10MPa for 2h, filter to obtain the intermediate polyether polyol, and set aside.

[0031] Add 160g of intermediate polyether polyol and 0.07g...

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Abstract

The invention belongs to the field of polyether polyol synthesis technologies, and particularly relates to a preparation method for flexible foam polyether polyol for low-density sponge. Only neosorb is used as an initiator, and the polyether polyol is prepared through the two-stage polymerization technique. The preparation method provided by the invention has the advantages that the degree of functionality of the prepared polyether polyol reaches 6, the molecular weight of the prepared polyether polyol can reach between 10,000 and 14,000, and the prepared polyether polyol has the characteristics of low degree of unsaturation and narrow molecular weight distribution, so as to solve the problem of subsequent reaction inactivation of conventional catalysts; moreover, compared with the traditional polyether polyol used for low-density sponge products, the polyether polyol prepared through the invention achieves a lower density as well as higher operation tolerance, dimensional stability, flexibility and the like, so that the application range is wider, and the application requirement for high-quality low-density sponge is met.

Description

technical field [0001] The invention belongs to the technical field of polyether polyol synthesis, and in particular relates to a preparation method of soft foam polyether polyol for low-density sponges. Background technique [0002] With the gradual growth of the national economy and the gradual improvement of people's living standards, consumers' requirements for furniture products are gradually increasing, which to a certain extent promotes the demand for sponge products prepared from special polyether polyols. The high-molecular-weight polyether polyols prepared by traditional KOH catalysts have poor performance due to side reactions in the polymerization process. In recent years, low-unsaturation, three-functional high-molecular-weight propylene oxide polyols prepared by bimetallic catalytic systems Polyols can meet the sponge needs of conventional customers, but there is no obvious breakthrough for low-density, high-quality, high-resilience products that require high p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08L75/08
Inventor 刘军马海晶孙兆任宁晓龙周玉波
Owner SHANDONG INOV NEW MATERIALS CO LTD
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