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A kind of polyurethane catalyst and its preparation method, and a kind of polyurethane spray rigid foam, a kind of polyurethane flexible foam

A rigid foam and catalyst technology, applied in the direction of polyurea/polyurethane coatings, coatings, fire-retardant coatings, etc., can solve the problems of by-product heteropoly, poor reaction selectivity, low yield, etc., to reduce odor and high selectivity , the effect of low emission

Active Publication Date: 2021-02-02
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of diethylenetriamine in the patent to prepare the important intermediate product N,N,N',N"-tetramethyldiethylenetriamine has poor reaction selectivity, many by-products and low yield

Method used

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  • A kind of polyurethane catalyst and its preparation method, and a kind of polyurethane spray rigid foam, a kind of polyurethane flexible foam
  • A kind of polyurethane catalyst and its preparation method, and a kind of polyurethane spray rigid foam, a kind of polyurethane flexible foam
  • A kind of polyurethane catalyst and its preparation method, and a kind of polyurethane spray rigid foam, a kind of polyurethane flexible foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] N,N,N’,N”-tetramethyl-N”-3-aminopropyldiethylenetriamine:

[0079] 500g (3.42mol) N,N,N'-trimethyl-N'-hydroxyethylethylenediamine and 40gCu / ZnO / Al 2 o 3 (JL-2 of Suzhou Jinlong Catalyst Co., Ltd.) was added to a 2L stainless steel autoclave. After purging the reactor with nitrogen and hydrogen, the catalyst was reduced at 195°C for 10 hours under a hydrogen pressure of 5.6 MPa, then the reactor was cooled to 25°C and vented to ambient pressure. Then 180 g (5.80 mol) of monomethylamine were added. After pressurizing to 1.5MPa with hydrogen, the reactor was heated to 200°C, reacted for 24 hours and cooled to 25°C, and the catalyst particles were filtered off to recover the product. Distill the reaction product to obtain N,N,N'-trimethyl-N'-hydroxyethylethylenediamine, N,N,N',N"-tetramethyldiethylenetriamine and other amines mixture.

[0080] Put 300g (containing about 1.20mol of N,N,N',N"-tetramethyldiethylenetriamine) of the above distillate into a three-necked roun...

Embodiment 2

[0088] In the following B3 formula system for exterior wall spraying (B3 classification of high-rise building decoration materials for combustion performance, the fire rating of polyurethane materials added with flame retardants in this formula is B3), the N, N, N', N"-tetramethyl -N"-3-aminopropyldiethylenetriamine and bis(tetramethyldiethylenetriaminopropyl)amine for application evaluation. The mixing mass ratio of the catalyst composition is N,N,N',N"-tetramethyl-N"-3-aminopropyldiethylenetriamine:bis(tetramethyldiethylenetriaminopropyl base) amine=8:2. The formulation composition is shown in Table 2.

[0089] Table 2 Composition of Embodiment 2

[0090]

[0091]

[0092] Configure the combined material according to the above formula, and use one-step method for manual free foaming operation: add the components of the prepared combined material into the container for high-speed dispersion for 5 minutes to obtain the combined material; put the combined material and P...

Embodiment 3

[0097] 50Kg / m 3 In the left and right modified MDI-based automotive high-resilience seat systems, the foaming performance of bis(tetramethyldiethylenetriaminopropyl)amine was tested.

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Abstract

The invention discloses a polyurethane catalyst and a preparation method thereof, a polyurethane spraying rigid foam and a polyurethane soft foam. The polyurethane catalyst comprises N, N, N', N "-tetramethyl-N"-3-aminopropyl diethylenetriamine and / or bis(tetramethyldiethylenetriaminopropyl )amine. The polyurethane catalyst has relatively large molecular weight and contains active hydrogen groups, which can realize low emission or low VOC in the process of preparing polyurethane. At the same time, the catalyst has high activity, especially has a strong catalytic effect on the reaction between isocyanate and water. The reaction of isocyanate and water generates carbon dioxide and releases a lot of heat, thereby accelerating the growth of the foaming system, and the generation of a large amount of gas can also improve the fluidity of the system. Improve the rise speed of the polyurethane foam system and improve the odor and VOC of the foam system.

Description

technical field [0001] The invention relates to a polyurethane catalyst, in particular to a method for preparing the catalyst, and using the catalyst to prepare polyurethane spray-coated rigid foam and flexible foam. 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 completed, the strength of the foam network skeleton resin is sufficient to trap small air ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/18C08G18/76C08G18/79C08G18/42C08G18/48C08G18/32C08J9/14C09D175/06C09D175/08C09D5/18C09D7/65
CPCC08G18/1808C08G18/1825C08G18/3275C08G18/3281C08G18/42C08G18/48C08G18/7671C08G18/794C08J9/144C08J2203/142C08J2375/06C08J2375/08C08J2483/04C09D5/185C09D175/06C09D175/08C09D7/65C08G2110/0008C08G2110/0025C08L83/04
Inventor 滕向丁宗雷陈杰刘赵兴张聪颖曹善健
Owner WANHUA CHEM GRP CO LTD
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