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Polyurethane catalyst and preparation method thereof, polyurethane spraying hard foam, and polyurethane soft foam

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

Active Publication Date: 2019-03-12
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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  • Polyurethane catalyst and preparation method thereof, polyurethane spraying hard foam, and polyurethane soft foam
  • Polyurethane catalyst and preparation method thereof, polyurethane spraying hard foam, and polyurethane soft foam
  • Polyurethane catalyst and preparation method thereof, polyurethane spraying hard foam, and polyurethane soft 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, polyurethane spraying hard foam, and polyurethane soft foam. The polyurethane catalyst comprises N,N,N',N''-tetramethyl-N''-3-aminopropyl diethylenetriamine and / or bis(tetramethyldiethyltriaminopropyl)amine. The polyurethane catalyst is larger in molecular weight, and contains an active hydrogen group, so low emission or low VOC can be realized in a process of preparing polyurethane. In addition, the catalyst has high activity, especially has the stronger catalytic effect to a reaction of isocyanate and water. The reaction of the isocyanate and the water generates carbon dioxide and releases a lot of heat, so growth of a foaming system is accelerated, and flowability of the system can be also improved throughgeneration of a large number of a gas. A starting speed of a polyurethane foam system is improved and a smell and the VOC of the foam system are improved.

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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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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