Polyurethane catalyst, preparation method thereof, polyurethane spraying rigid foam and polyurethane flexible foam

A polyurethane catalyst and polyurethane technology, applied in the field of polyurethane, can solve the problems of the influence of the physical properties of the polyurethane products, the increase of the steric hindrance of the N atom of the tertiary amine, the decrease of the molecular movement ability, etc., to achieve low odor mechanical properties, the method is simple and easy to implement, and the The effect of applying cost

Active Publication Date: 2020-02-14
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reactive catalyst with active hydrogen groups will be linked to the polyurethane molecular chain during the polyurethane reaction process, which will reduce the molecular movement ability and increase the steric hindrance of the N atom of the tertiary amine, resulting in a gradual decline in the catalytic efficiency of the reactive catalyst.

Method used

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  • Polyurethane catalyst, preparation method thereof, polyurethane spraying rigid foam and polyurethane flexible foam
  • Polyurethane catalyst, preparation method thereof, polyurethane spraying rigid foam and polyurethane flexible foam
  • Polyurethane catalyst, preparation method thereof, polyurethane spraying rigid foam and polyurethane flexible foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] N,N,N’,N”-tetramethyl-N”-1,2-dicyanoethyldiethylenetriamine:

[0087] Put 300g of N,N,N',N"-tetramethyldiethylenetriamine into a three-necked round-bottomed flask, heat to 50°C, add 265g of 50wt% fumaronitrile solution in benzene dropwise, Control dropwise time is 2 hours.After dropwise finishes, make reaction carry out 6 hours again.The product that obtains carries out normal pressure 85 ℃ of distillations and removes benzene.The reaction solution is carried out rectification under vacuum again, under absolute pressure 1KPa, The number of theoretical plates in the rectification column is 35, the reflux ratio is 5:1, the temperature at the top of the collection column is 65-67°C, and the unreacted N,N,N',N"-tetramethyldiethylenetri Amine; collect fraction 2 at the top temperature of 182-184°C to obtain N,N,N',N"-tetramethyl-N"-1,2-dicyanoethyldiethylenetriamine. Bruker AVANCEⅢ400Hz nuclear magnetic resonance spectrometer was used for carbon spectrum analysis, and the s...

Embodiment 2、3

[0096] Embodiment 2,3 and comparative example 1-3

[0097] 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), except for the foaming catalyst, the composition of the combined material is shown in the table below 2.

[0098] Table 2 Composition of the composite material except the foaming catalyst

[0099] components factory parts by mass Polyether 4110 Jiangsu Zhongshan Chemical Industry 65 Polyester PS-3152 Nanjing Stepan 35 Hard foam silicone oil AK8801 Mester 2.7 water self made 1.2 HCFC-141b Honeywell 45 Triethanolamine Longxi Chemical Industry 5.3 TCPP Jiangsu Changyu Chemical Industry 26 Niax-A33 Momentum 3.1 LCM-1 Jiangdian Chemical 0.55 Niax-D22 Momentum 0.25

[0100] The types an...

Embodiment 4、5

[0108] Embodiment 4,5 and comparative example 4-6

[0109] 50Kg / m 3 In the left and right modified MDI-based automotive high-resilience seat systems, the composition of the materials except for the foam catalyst is shown in Table 5 below.

[0110] Table 5 Except for the foaming catalyst, the formula of high resilience foam combination

[0111] components factory parts by mass F3135 Wanhua Chemical 85 POP2140 Wanhua Chemical 15 B8715 Evonik Chemicals 0.8 Diethanolamine DEOA Longxi Chemical Industry 0.7 water 4.3 Niax-A33 Momentum 0.45 Isocyanate Index 90

[0112] Adjust the dosage of the foaming catalyst in the following 5 groups of experiments, so that the starting time of each group is about 8s;

[0113] The types and amounts of the foaming catalysts of Examples 4, 5 and Comparative Examples 4-6 are shown in Table 6.

[0114] The foaming type catalyst kind and consumption of table 6 embodiment 4,5 and ...

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PUM

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Abstract

The invention discloses a polyurethane catalyst, a preparation method of the polyurethane catalyst, polyurethane spraying rigid foam and polyurethane flexible foam. The structural formula of the polyurethane catalyst is shown in the specification, wherein R1 is selected from -NH2,-N(CH3)2 and-NHCH3; and R2 is selected from -NH2,-N(CH3)2 and -NHCH3. The polyurethane catalyst can be used to preparepolyurethane foam plastics, including reacting an organic polyisocyanate and a polyol in the presence of a blowing agent, a foam stabilizer, and the catalyst. The catalyst has a diethylenetriamine skeleton, has high catalytic activity and selectivity, and especially has a strong catalytic effect on the reaction of isocyanate and water.

Description

technical field [0001] The invention relates to the field of polyurethane, in particular to a polyurethane catalyst and polyurethane sprayed 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] At present, most of the bulk tertiary amine catalysts on the market are small molecule products that are easy to emit, have a nasty amine odor, and will continue to migrate out during the construction process or from the foam product, causing harm to human health, such as A1( Dipropylene glycol solution containing 70% wt of bis(dimethylaminoethyl) ether), A33 (dipropylene glycol solution containing 33% wt...

Claims

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Application Information

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IPC IPC(8): C08G18/18C07C209/48C07C211/14C07C209/60C08G18/48C08G18/42C08G18/63C08J9/14C08J9/08C08G101/00
CPCC07C209/48C07C209/60C07C253/30C08G18/1808C08G18/4018C08G18/4072C08G18/42C08G18/48C08G18/632C08J9/08C08J9/144C08J2203/02C08J2203/142C08J2203/184C08G2110/0008C08G2110/0025C08G2110/005C08G2110/0083C07C255/24C07C211/14
Inventor 滕向刘赵兴张聪颖陈杰魏运恒高杭
Owner WANHUA CHEM GRP CO LTD
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