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Low-diffusion reactive-type tertiary amine catalyst, and preparation method and application of same

A catalyst and reaction-type technology, which is applied in the field of preparation of low-emission reaction-type tertiary amine catalysts, can solve the problems of weak catalytic gel reaction, small amount of tertiary amine N, high activity of active hydrogen, etc., and achieve good foaming and coagulation Effects of gel balance, viscosity reduction, and catalytic ability enhancement

Active Publication Date: 2018-04-27
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This type of product has certain limitations: first, due to the existence of urea groups, there is a strong hydrogen bond between the urea groups, which makes the product highly viscous and inconvenient to use; second, the amount of tertiary amine N is relatively high less, the ability to catalyze the gel reaction is weak; three, the active hydrogen activity on the urea group is high, and it is easy to react with the isocyanate group in the early stage of the reaction, so that the catalytic activity decreases rapidly; four, it is not suitable for the modified MDI mold Used as a gel-type catalyst in plastic high resilience systems

Method used

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  • Low-diffusion reactive-type tertiary amine catalyst, and preparation method and application of same
  • Low-diffusion reactive-type tertiary amine catalyst, and preparation method and application of same
  • Low-diffusion reactive-type tertiary amine catalyst, and preparation method and application of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of 3-dimethylaminopropylurea and N,N'-bis(3-dimethylaminopropylurea):

[0034] First, dissolve 60g of urea in 180g of methanol, add it to a 1L reaction kettle, seal the reaction kettle, replace it with nitrogen three times, then increase the pressure to 1MPa, start stirring at 500 rpm, wait for the temperature to rise to 120°C, and start the reaction In the still, add N, N-dimethylaminopropylamine dropwise with a pump, and the flow rate of the pump is 1g / min. When the feed amount of N, N-dimethylaminopropylamine is 107.1g, stop feeding, and after 10min, the temperature will be reduced. Lower the temperature to 50°C, release the ammonia and nitrogen generated by the reaction, add fresh nitrogen at 2MPa, raise the reaction temperature to 120°C and continue the reaction for 2h, then stop the reaction. The temperature of the reaction liquid was lowered to 30°C, the ammonia in the reaction liquid was removed by a vacuum pump, and then filtered, and the compositio...

Embodiment 2

[0036] Preparation of 2,4,8-trimethyl-2,4,8-triazanonan-3-ol and 2,6,8,12-tetramethyl-2,6,8,12-tetraazadeca Trialkan-7-ol:

[0037] The resulting 3-dimethylaminopropyl urea and N,N'-bis(3-dimethylaminopropyl urea) reaction solution was directly transferred to a 1.5L reactor, and a commercial 5% palladium carbon catalyst (Johnson Wanfeng, model: 5ZA503023) 1.5g, seal the reaction kettle, replace it with nitrogen and hydrogen three times respectively, the initial hydrogen pressure is 2 MPa, start stirring at 700 rpm, wait for the reaction temperature to rise to 120 ° C, adjust the hydrogen pressure To 5MPa and continue to flow hydrogen, start to pass 388g of 37% formaldehyde solution into the reactor at a speed of 2g / min with a convection pump, wait until the instantaneous flow rate of the flow meter is lower than 50sccm, close the hydrogen valve, and continue to react for half an hour to stop the reaction . Afterwards, the temperature was lowered, the pressure was released, r...

Embodiment 3

[0039] Prepare polyurethane foam:

[0040] Catalyst composition of the present invention is applied to conventional polyurethane flexible foam flexible foam material, and its basic formula is as follows

[0041]

[0042]

[0043] The amount of polyisocyanate used in the polyurethane formulations of the present invention is not limited, but is typically within the range known to those skilled in the art.

[0044] In the following 50Kg / m3 modified MDI-based automotive high-resilience seat system, 3-dimethylaminopropyl urea and its methylated product 2,4,8-trimethyl-2,4,8 -Triazanonan-3-ol for foaming performance comparison.

[0045]

[0046] One-step manual free foam operation: add polyol, water, cross-linking agent, surfactant and catalyst to the container in proportion and disperse at high speed for 5 minutes to prepare composite material; put composite material and isocyanate into constant temperature culture The box is subjected to constant temperature treatment a...

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Abstract

The invention provides a low-diffusion reactive-type tertiary amine catalyst, and a preparation method and an application of same. The catalyst is composed of the compound I or the compound II, or isa mixture of the two compounds. The catalyst is mainly used for producing water-foaming soft polyurethane foam materials. The prepared polyurethane foam is excellent in physical performance and low inVOC and odor.

Description

technical field [0001] The invention relates to a preparation and application method of a low emission reaction type tertiary amine catalyst. Specifically, the preparation of 2,4,8-trimethyl-2,4,8-triazanonan-3-ol and / or 2,6,8,12-tetramethyl-2,6,8 , A method for 12-tetraazatridecane-7-ol and its use. Background technique [0002] The polyurethane foam system mainly includes polyisocyanate, polyol, foaming agent, surfactant, crosslinking agent, catalyst, etc. Among them, the catalyst is mostly a tertiary amine catalyst, which has a certain catalytic effect on the foaming reaction (reaction of water and isocyanate to generate carbon dioxide) and gel reaction (reaction of polyol and isocyanate). [0003] During the foaming process, the combination of tertiary amine catalysts in the system needs to achieve a certain balance between the foaming reaction and the gelling reaction. If the catalyst as a whole tends to promote the foaming reaction, when the foaming reaction is comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/18C08J9/08C08G101/00
CPCC08G18/1825C08G2110/0008C08G2110/005C08G2110/0083
Inventor 滕向刘振国张聪颖丁宗雷陈杰曹善健
Owner WANHUA CHEM GRP CO LTD
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