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Self-emulsifying aqueous nitrocellulose emulsion and preparation thereof

A nitrocellulose and self-emulsifying technology, applied in the field of nitrocellulose coatings, can solve the problems of insufficient film-forming properties, poor adhesion of pure nitrocellulose, and low consumption of nitrocellulose, and achieves the possibility of reducing environmental pollution, Solve the effect of poor adhesion performance and fast film forming speed

Inactive Publication Date: 2009-07-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to provide a preparation method of self-emulsifying water-based nitrocellulose emulsion, which can solve the problem of poor adhesion after pure nitrocellulose film is formed; solve the problem that the existing preparation method needs to add an emulsifier and the emulsion has poor stability ; Solve the problem that the existing preparation method cannot fully reflect its excellent film-forming performance due to the small amount of nitrocellulose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Weigh raw materials:

[0053] 144g (6.96%) 1 / 2a S nitrocellulose

[0054] 40g (1.93%) dimethylolpropionic acid (DMPA)

[0055] 66g (3.19%) N-methylpyrrolidone (NMP)

[0056] 89g (4.30%) isophordione diisocyanate (IPDI)

[0057] 0.4g (0.02%) dibutyltin dilaurate (DBTDL)

[0058] 500g (24.16%) butanone

[0059] 30g (1.45%) triethylamine

[0060] 1200g (57.99%) water

[0061] (2) in N 2 Under air protection, dissolve dimethylolpropionic acid (DMPA) in N-methylpyrrolidone (NMP), add it to the reactor after forming a homogeneous transparent solution, and stir; then add isophordione diisocyanate (IPDI ) and dibutyltin dilaurate (DBTDL), reacted for 0.9 hours under 42 ℃ of water bath heating conditions;

[0062] (3) Dissolve the nitrocellulose in methyl ethyl ketone after removing water, add it dropwise to the reactor, raise the temperature of the reactor to 68°C at the same time, add the time for 20 minutes, and the reaction time for 2 hours; reduce the temperatur...

Embodiment 2

[0065] (1) Weigh raw materials:

[0066] 144g (6.95%) 1 / 2a S nitrocellulose

[0067] 38g (1.84%) dimethylolpropionic acid (DMPA)

[0068] 66g (3.20%) N-methylpyrrolidone (NMP)

[0069] 89g (4.30%) isophordione diisocyanate (IPDI)

[0070] 0.2g (0.01%) dibutyltin dilaurate (DBTDL)

[0071] 500g (24.00%) butanone

[0072] 30.49g (1.60%) triethylamine

[0073] 1200g (58.10%) water

[0074] (2) in N 2 Under air protection, dissolve dimethylolpropionic acid (DMPA) in N-methylpyrrolidone (NMP), add it to the reactor after forming a homogeneous transparent solution, and stir; then add isophordione diisocyanate (IPDI ) and dibutyltin dilaurate (DBTDL), reacted for 1.2 hours at 35°C under water bath heating conditions;

[0075] (3) Dissolve the nitrocellulose in methyl ethyl ketone after removing water, and add it dropwise to the reactor, while increasing the temperature of the reactor to 75° C., the dropping time is 20 minutes, and the reaction time is 1.8 hours; the temperatu...

Embodiment 3

[0078] (1) Weigh raw materials:

[0079] 144g (6.95%) 1 / 2a S nitrocellulose

[0080] 41g (1.98%) dimethylolpropionic acid (DMPA)

[0081] 66g (3.18%) N-methylpyrrolidone (NMP)

[0082] 88.8g (4.28%) isophordione diisocyanate (IPDI)

[0083] 0.4g (0.02%) dibutyltin dilaurate (DBTDL)

[0084] 500g (24.12%) butanone

[0085] 33g (1.59%) triethylamine

[0086] 1200g (57.88%) water

[0087] (2) in N 2 Under air protection, dissolve dimethylolpropionic acid (DMPA) in N-methylpyrrolidone (NMP), add it to the reactor after forming a homogeneous transparent solution, and stir; then add isophordione diisocyanate (IPDI ) and dibutyltin dilaurate (DBTDL), reacted 1 hour under 40 ℃ of water bath heating conditions;

[0088] (3) Dissolve the nitrocellulose in methyl ethyl ketone after removing water, add it dropwise to the reactor, raise the temperature of the reactor to 72°C at the same time, add the time for 20 minutes, and the reaction time for 2 hours; reduce the temperature of ...

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PUM

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Abstract

The invention relates to the nitro coating field, in particular to a self-emulsifying water-based nitrocellulose emulsion and a preparation method thereof; and the raw materials of the invention comprise the following components by weight percentage: 0.89%-8.60% of nitrocellulose or nitro coating paint film, 1.80%-2.00% of dimethylolpropionic acid, 2.90%-3.25% of N-methyl pyrrolidone, 4.15%-4.40% of isophorone diisocyanate, 0.01%-0.03% of dibutyl tin dilaurate, 23.80%-26.90% of butanone, 1.40%-1.60% of triethylamine and 57.00%-62.00% of water.

Description

technical field [0001] The invention relates to the field of nitrocellulose coatings, in particular to a self-emulsifying water-based nitrocellulose emulsion and a preparation method thereof. Background technique [0002] With the improvement of environmental protection requirements, the high volatile organic compound (VOC) content of solvent-based nitrocellulose coatings seriously restricts its application and development; however, if no other resin nitrocellulose is added, the adhesion after film formation is poor, and it is difficult to It is easy to peel or tear off, and it is difficult to use alone as a base material for paint. Therefore, how to reduce its VOC content and improve film adhesion is of great significance. The most effective solution is to introduce other resins or functional groups into nitrocellulose and disperse it in water to form an emulsion. [0003] At present, the preparation methods of nitrocellulose emulsion include external emulsification method...

Claims

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Application Information

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IPC IPC(8): C08J3/07C08G18/08C08G18/64C09D101/18C09D175/06
Inventor 郭焱张仁旭陶铁托赵利兵董晓飞马素德
Owner XI AN JIAOTONG UNIV
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