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Preparation method of polyether modified polysiloxane foam stabilizer

A polysiloxane and polyether modification technology, which is applied to a preparation field of polyether modified polysiloxane, can solve the problem that the foam-stabilizing performance of the foam-stabilizing agent is unstable, and the foam-stabilizing effect of the foam-stabilizing agent is affected. The problem of high viscosity of foaming agent products can achieve the effects of easy control of the production process, stable structure and composition, and good foam uniformity.

Active Publication Date: 2013-10-09
扬州晨化新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The disadvantages of the above two technical solutions are: the presence of hydroxyl groups in the unblocked modified polyether will affect the foam stabilization effect of the foam stabilizer in the flexible foam polyurethane; the molecular weight distribution of the modified polyether is too wide, resulting in the The composition of the foam stabilizer is unstable, and it will cause incomplete capping of polyether, which will affect the unstable foam stabilizer performance of the foam stabilizer; the final foam stabilizer product has too high viscosity, which is extremely inconvenient during the use of polyurethane foam stabilizer

Method used

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  • Preparation method of polyether modified polysiloxane foam stabilizer
  • Preparation method of polyether modified polysiloxane foam stabilizer
  • Preparation method of polyether modified polysiloxane foam stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] 1. Prepare allyl oxide ethylene oxide propylene oxide methyl ethers with different molecular weights respectively:

[0073] 1) Put 260kg of allyl alcohol and 4kg of sodium hydroxide into the reaction kettle, vacuumize at room temperature, and when the pressure reaches -0.095MPa, turn off the vacuum, start stirring, raise the temperature to 80°C, and slowly introduce 750kg of ethylene oxide and 990kg Propylene oxide, the temperature is controlled at 100-160 °C, after the feeding is completed, the aging reaction is performed until the pressure in the kettle is negative, and the reaction is stopped. Transfer the obtained allyl polyoxyethylene polyoxypropylene ether into the end-capped kettle, add 270kg of sodium hydroxide, and heat the reaction kettle to 60-80°C. After stirring for half an hour, replace it with nitrogen and then vacuumize it. The vacuum reaches - 0.095MPa, close the vacuum valve, slowly feed 270kg of methyl chloride, keep the temperature of the kettle betw...

Embodiment 2

[0082] 1. Prepare allyl oxide ethylene oxide propylene oxide methyl ethers with different molecular weights.

[0083] 1) Put 230kg of allyl alcohol and 6kg of sodium hydroxide into the reaction kettle quickly, vacuumize at room temperature, and when the pressure reaches -0.095MPa, turn off the vacuum, start stirring, raise the temperature to 80°C, and slowly introduce 760kg of ethylene oxide and 1010kg of propylene oxide, the temperature is controlled at 100-160°C, after the feeding is completed, the aging reaction is performed until the pressure in the kettle is negative, and the reaction is stopped, and the obtained allyl polyoxyethylene polyoxypropylene ether is transferred to the end-capping kettle, and 238kg of sodium hydroxide, the temperature of the reaction kettle is raised to 60-80°C, after stirring for half an hour, the vacuum is pumped after nitrogen replacement, the vacuum reaches -0.095MPa, the vacuum valve is closed, and 240kg of methyl chloride is slowly introduc...

Embodiment 3

[0093] 1. Prepare allyl oxide ethylene oxide propylene oxide methyl ethers with different molecular weights.

[0094] 1) Put 190kg of allyl alcohol and 6kg of sodium hydroxide into the reaction kettle quickly, vacuumize at room temperature, and when the pressure reaches -0.095MPa, turn off the vacuum, start stirring, raise the temperature to 80°C, and slowly introduce 780kg of ethylene oxide and 1030kg of propylene oxide, the temperature is controlled at 100-160 °C, after the feeding is completed, the aging reaction is until the pressure in the kettle is negative, and the reaction is stopped, and the obtained allyl polyoxyethylene polyoxypropylene ether is transferred to the end-capping kettle, adding 262kg of sodium hydroxide, the temperature of the reaction kettle is raised to 60-80°C, after stirring for half an hour, the vacuum is pumped after nitrogen replacement, the vacuum reaches -0.095MPa, the vacuum valve is closed, and 200kg of methyl chloride is slowly introduced, an...

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Abstract

The invention discloses a preparation method of a polyether modified polysiloxane foam stabilizer and relates to a preparation method of a foam stabilizer for flexible polyurethane foam. The polyether modified polysiloxane foam stabilizer is generated through reaction between allyl epoxyethane and methyloxirane methyl ethers with different molecular weights and silicone oil with low hydrogen content under the conditions that methylbenzene as a solvent and chloroplatinic acid as a catalyst. Through controlling the degree of polymerization of a hydrophilic polyether chain segment and a hydrophobic polysiloxane chain segment of polyether modified polysiloxane, the foam stabilizer has precise hydrophilic-lipophilic balance property, better emulsifying property and a favorable foam stabilizing effect, so that a flexible polyurethane foam mixture has enough stability in a coring stage, a form hole growing stage, a punching stage and an early-stage crosslinking stage, and foam collapse cannot be caused.

Description

technical field [0001] The invention relates to a preparation method of a foam stabilizer for polyurethane flexible foam, in particular to a preparation method of polyether modified polysiloxane. Background technique [0002] Polyurethane foam plastics are chemically reacted by a variety of raw materials in a very short period of time, and change from liquid to colloid and then to high polymer, during which they undergo complex processes such as foaming and consolidation. It acts as a central adjustment to make the foaming uniform and stable. Polyether-modified polysiloxane enables the foam stabilizer to have a precise hydrophilic-lipophilic balance by controlling the type, quantity and position of the hydrophilic polyether segment and the hydrophobic polysiloxane segment. The agent has better emulsifying properties and good foam stabilization, so that the polyurethane flexible foam mixture has sufficient stability during the nucleation stage, cell growth, "punching" and ea...

Claims

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Application Information

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IPC IPC(8): C08G77/46C08G65/28C08G77/12C08J9/00C08L75/04
Inventor 董晓红房连顺郝静琳江迎秋杨建
Owner 扬州晨化新材料股份有限公司
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