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A kind of preparation method and application method of foaming waterborne polyurethane

A water-based polyurethane and foaming technology, which is applied in the field of water-based polyurethane, can solve the problems of solvent pollution and solvent residue, and achieve the effects of improving stability, good foaming and foam stabilization

Active Publication Date: 2019-10-25
聊城市鑫润达塑胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] In order to overcome the problems in the prior art, the purpose of the present invention is to provide a preparation and application method of foamable water-based polyurethane. The preparation method combines the advantages of external emulsification and internal emulsification, and the resulting foamable water-based polyurethane has good The foaming effect, the synthesis process does not use any solvent, can be used for the production of products such as water-based polyurethane foam bass, water-based polyurethane coated cloth and water-based polyurethane foam film, overcomes the problems caused by the use of solvent-based polyurethane in the prior art Solvent Contamination and Solvent Carryover Issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add fatty acid, triethylamine and polymer diol into the reaction kettle, react at 80°C for 35min, then add diisocyanate after vacuum dehydration for 15min, react at 80°C for 2.5h, then add DMPA (dimethylol propionic acid) and 1,4-butanediol, react at 80°C for 1.5h, cool down to 40°C; finally, add deionized aqueous solution containing chain extender and emulsifier, and react at 40°C for 1.5h to obtain synthetic leather Use foaming water-based polyurethane. Among them, the deionized aqueous solution containing chain extender and emulsifier is prepared by adding chain extender and emulsifier to deionized water; fatty acid, triethylamine, polymer diol, diisocyanate, DMPA, 1,4 - The molar ratio of butylene glycol, chain extender, emulsifier, and deionized water is 10:10:8:40:6:7:9:0.1:2500.

[0033] Described fatty acid is stearic acid.

[0034] The polymer diol polyadipate-1,4-butylene glycol ester diol (PBA).

[0035] The diisocyanate isophorone diisocyanate (IPDI).

...

Embodiment 2

[0039] Add fatty acid, triethylamine and polymer diol into the reaction kettle, react at 95°C for 30min, then add diisocyanate after vacuum dehydration for 20min, react at 85°C for 2h, then add DMPA (dimethylol Propionic acid) and 1,4-butanediol, react at 85°C for 1h, cool down to 45°C; finally, add deionized aqueous solution containing chain extender and emulsifier, and react at 45°C for 1h to obtain foam for synthetic leather Type water-based polyurethane. Among them, the deionized aqueous solution containing chain extender and emulsifier is prepared by adding chain extender and emulsifier to deionized water; fatty acid, triethylamine, polymer diol, diisocyanate, DMPA, 1,4 - The molar ratio of butylene glycol, chain extender, emulsifier, and deionized water is 10:15:10:35:4:8:11:0.1:3500.

[0040] The fatty acid is lauric acid.

[0041] The polymer glycol polytetrahydrofuran ether glycol (PTMEG).

[0042]The diisocyanate hexamethylene diisocyanate (HDI).

[0043] The cha...

Embodiment 3

[0046] Add fatty acid, triethylamine and polymer diol into the reaction kettle, react at 85°C for 30min, then add diisocyanate after vacuum dehydration for 17min, react at 82°C for 2h, then add DMPA (dimethylol propionic acid) and 1,4-butanediol, react at 83°C for 1.3h, cool down to 42°C; finally, add deionized aqueous solution containing chain extender and emulsifier, and react at 42°C for 1.2h to obtain synthetic leather Foaming water-based polyurethane. Among them, the deionized aqueous solution containing chain extender and emulsifier is prepared by adding chain extender and emulsifier to deionized water; fatty acid, triethylamine, polymer diol, diisocyanate, DMPA, 1,4 - The molar ratio of butylene glycol, chain extender, emulsifier, and deionized water is 10:12:9:45:5:4:10:0.2:3000.

[0047] The fatty acid is palmitic acid.

[0048] The polymer diol PPG (polyoxypropylene glycol).

[0049] The 4,4'-dicyclohexylmethane diisocyanate (H12MDI).

[0050] The chain extender ...

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PUM

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Abstract

The invention discloses a preparation method and an application method of foaming type waterborne polyurethane. The preparation method comprises the following steps: adding fatty acid, triethylamine and polymer glycol into a reaction kettle, performing reaction for 30-35 minutes at 80-95 DEG C, dehydrating, adding diisocyanate, performing reaction for 2-2.5 hours at 80-85 DEG C, further adding DMPA (Dimethylol Propionic Acid) and 1,4-butanediol, performing reaction for 1.5-2 hours at 80-85 DEG C, and cooling to 40-45 DEG C; and finally, adding a deionized water solution containing a chain expanding agent and an emulsifier, and performing reaction for 1-1.5 hours at 40-45 DEG C, thereby obtaining foaming type waterborne polyurethane. The foamed type waterborne polyurethane disclosed by the invention has a good foaming function, is free of solvent in the synthesis process, and can be applied to production of products such as waterborne polyurethane synthetic leather foamed bases, waterborne polyurethane coating cloth and waterborne polyurethane foamed films, and the problems of solvent pollution and solvent residues caused by application of solvent type polyurethane in production can be solved.

Description

technical field [0001] The invention relates to the technical field of water-based polyurethane, in particular to a preparation and application method of foamed water-based polyurethane. Background technique [0002] With the country and people's high attention to environmental protection and the continuous improvement of requirements, solvent-based polyurethane is gradually replaced by non-polluting polyurethane due to its serious solvent pollution. Among them, water-based polyurethane (WPU) is due to its environmental protection and good comprehensive performance. It has very broad prospects in the field of polyurethane. Among them, the development of some waterborne polyurethanes with special properties has gradually become a research hotspot in this field. [0003] At present, waterborne polyurethane can be prepared by external emulsification method and internal emulsification method. The external emulsification method is to rely on high shear force to emulsify polyure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/66C08G18/42C08G18/48C08G18/32C08G18/34C08G18/12C08J9/30C08G101/00
CPCC08G18/12C08G18/4238C08G18/4825C08G18/4854C08G18/664C08G18/6659C08G18/6674C08G18/6692C08G18/73C08G18/755C08G18/758C08G2101/00C08J9/30C08J2375/06C08J2375/08C08G18/3228C08G18/3231
Inventor 马兴元赵昭张铭芮丁博
Owner 聊城市鑫润达塑胶制品有限公司
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