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Combined polyether polyol comprising active group-containing polyurethane catalyst and preparation method thereof

A technology of polyurethane catalyst and polyether polyol, which is applied in the field of catalyst and polyurethane, can solve the problems that the storage stability of combined polyether polyol cannot be stored for a long time, and cannot be popularized and used on a large scale.

Active Publication Date: 2020-09-22
上海墨梵新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned foaming agent and tertiary amine catalyst exist simultaneously in the combined polyether polyol, which leads to the defect that the storage stability of the combined polyether polyol cannot be stored for a long time, resulting in the inability to be widely used

Method used

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  • Combined polyether polyol comprising active group-containing polyurethane catalyst and preparation method thereof
  • Combined polyether polyol comprising active group-containing polyurethane catalyst and preparation method thereof
  • Combined polyether polyol comprising active group-containing polyurethane catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Add 125 grams of glycerin and 180 grams of sucrose into a 2000 ml stainless steel test kettle with stirring, heating and temperature control devices, and add 2.5 grams of potassium hydroxide. After nitrogen replacement, start stirring and raise the temperature to 100°C, slowly add 700 grams of propylene oxide dropwise, after the epoxide addition is complete, keep the reaction at 115°C for 1 hour, vacuum degas for 1 hour, and then add adipic acid neutralizer 6.6 Gram, stirring for 40 minutes, discharging and bottling to obtain 985 grams of polyether polyol according to Example 1, with a detected hydroxyl value of 447 mgKOH / g.

example 2

[0060] Put pre-melted 285 g of o-toluenediamine into a 2000 ml stainless steel test kettle with stirring, heating and temperature control devices, and add 2.5 g of potassium hydroxide. After nitrogen replacement, start stirring and raise the temperature to 100°C, slowly add 713 grams of propylene oxide dropwise. After the epoxide addition is completed, keep the reaction at 115°C for 1 hour, vacuum degas for 1 hour, and then add adipic acid neutralizer 6.6 Gram, stirring for 40 minutes, discharging and bottling to obtain 978 grams of polyether polyol according to Example 2 with a detected hydroxyl value of 399 mgKOH / g.

Embodiment 3

[0063] The above polyether polyol according to Example 1, the polyether polyol according to Example 2 and the polyether polyol processed by traditional refining methods obtained in the market were respectively formulated into a combined polyether for rigid polyurethane foam, and the storage test and Foam detection. The test results are shown in Table 1 below.

[0064] In Table 1, the start time and gel time

[0065] Measure according to the method specified in the standard "HG / T 4574-2014 Method for Measuring the Foaming Reaction Characteristics of Polyurethane Raw Materials".

[0066] Table 1: The combined polyether polyol formula and reaction parameters of Example 3 and Comparative Example 1.

[0067]

[0068]

[0069] It can be seen from Table 1 above that the starting time of the combined polyether polyol according to the present invention after 14 days of storage differs from the starting time of 1 day by 2 seconds, which is almost within the allowable measurement error range. ...

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Abstract

The invention relates to a combined polyether polyol comprising an active group-containing polyurethane catalyst and a preparation method of the combined polyether polyol. The present application alsorelates to polyurethane foams formed by the reaction of the combined polyether polyol as described above and isocyanates. The combined polyether polyol described herein includes a polyurethane catalyst containing an active group and a polyether polyol containing a carboxylate catalyst, such that the combined polyether polyol can be stably stored for a long period of time. After storage for 14 days, the change of the starting time and the gelation time of the combined polyether polyol, which is measured according to the <HG / T 4574-2014 polyurethane material-determination of foam reaction characteristic>, is within a permitted error range.

Description

Technical field [0001] This application relates to the technical field of catalysts and polyurethanes. Specifically, this application relates to a combined polyether polyol including a polyurethane catalyst containing an active group and a preparation method thereof. This application also relates to a polyurethane foam formed by the reaction of a combined polyether polyol and an isocyanate as described above. Background technique [0002] Rigid polyurethane foam is prepared by reacting isocyanate and combined polyether polyol. In addition to polyether polyols, combined polyether polyols also contain other ingredients such as water, flame retardants, blowing agents, foam stabilizing surfactants, and catalysts. To promote the reaction of isocyanate and polyol to form carbamate, form carbon dioxide and urea-based compound with water and form isocyanurate (trimer) with excess isocyanate. The blowing agent in the combined polyether polyol is usually a liquid or gas whose boiling po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/50C08G18/48C08G18/18C08J9/14C08G101/00
CPCC08G18/482C08G18/5027C08G18/4883C08G18/1875C08G18/1808C08G18/1825C08J9/144C08J2203/142
Inventor 傅东海
Owner 上海墨梵新材料科技有限公司
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