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Novel oxazolidine, preparation method, application, and mono-component polyurethane waterproof paint

A polyurethane waterproof and oxazolidine technology, applied in the field of polyurethane additives, can solve problems such as bubbles, achieve uniform dispersion, improve stability, and eliminate bubbles

Inactive Publication Date: 2015-11-18
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The one-component polyurethane waterproof coating containing oxazolidine latent curing agent in the prior art will be precipitated or aggregated in the waterproof coating during long-term storage, and the direct consequence is There will be a lot of bubbles after the one-component polyurethane waterproof coating is formed into a film

Method used

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  • Novel oxazolidine, preparation method, application, and mono-component polyurethane waterproof paint
  • Novel oxazolidine, preparation method, application, and mono-component polyurethane waterproof paint
  • Novel oxazolidine, preparation method, application, and mono-component polyurethane waterproof paint

Examples

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Effect test

Embodiment 1

[0048] The present embodiment provides a kind of preparation method of novel oxazolidine, comprises the following steps:

[0049] (1) 20 mass parts of 2-fluorobenzaldehyde and 50 mass parts of organic solvent N,N-dimethylformamide are mixed, then 20 mass parts of oxazolidine, 30 mass parts of the first catalyst carbonic acid Potassium, reacted at 130°C for 10 hours to obtain 2-(3-oxazolidinyl)benzaldehyde;

[0050] (2) 2-(3-oxazolidinyl) benzaldehyde of 20 mass parts, the second catalyst scandium trifluoromethanesulfonate of 5 mass parts, the first organic solvent dichloroethane of 400 mass parts are mixed, in Reaction at 80°C for 10 hours to obtain benzoxazinooxazolidine;

[0051] (3) The benzoxazinoxazolidine of 10 mass parts, the second organic solvent dichloroethane of 100 mass parts are mixed, add methyl Grignard reagent, Grignard reaction takes place, the temperature of Grignard reaction is- At 5°C, a saturated ammonium chloride solution was added to quench the reactio...

Embodiment 2

[0074] The present embodiment provides a kind of preparation method of novel oxazolidine, comprises the following steps:

[0075] (1) Mix 22 parts by mass of 2-fluorobenzaldehyde with 20 parts by mass of organic solvent N,N-dimethylformamide (DMF), then add 18 parts by mass of oxazolidine, 28 parts by mass of A catalyst, potassium carbonate, was reacted at 150°C for 6 hours to obtain 2-(3-oxazolidinyl)benzaldehyde;

[0076]

[0077] (2) 10 mass parts of 2-(3-oxazolidinyl) benzaldehyde, the second catalyst scandium trifluoromethanesulfonate of 7 mass parts, the first organic solvent dichloroethane (DCE) of 500 mass parts Mix and react at 90°C for 2 hours to obtain benzoxazinoxazolidine;

[0078]

[0079] (3) 12 mass parts of benzoxazinoxazolidine and 50 mass parts of the second organic solvent dichloroethane (DCE) are mixed, and methyl Grignard reagent (methylmagnesium bromide) is added to generate a lattice Grignard reaction, the temperature of the Grignard reaction wa...

Embodiment 3

[0118] The present embodiment provides a kind of preparation method of novel oxazolidine, comprises the following steps:

[0119] (1) 30 mass parts of 2-fluorobenzaldehyde and 10 mass parts of organic solvent N,N-dimethylformamide are mixed, then 12 mass parts of oxazolidine, 25 mass parts of the first catalyst carbonic acid Potassium, reacted at 140°C for 1 hour to obtain 2-(3-oxazolidinyl)benzaldehyde;

[0120] (2) 12 mass parts of 2-(3-oxazolidinyl) benzaldehyde, 6 mass parts of the second catalyst scandium trifluoromethanesulfonate, and 300 mass parts of the first organic solvent benzene are mixed at 100° C. React for 6 hours to obtain benzoxazinoxazolidine;

[0121] (3) The benzoxazinoxazolidine of 15 mass parts, the second organic solvent benzene of 30 mass parts are mixed, add methyl Grignard reagent, Grignard reaction takes place, the temperature of Grignard reaction is 5 ℃, then The reaction was quenched by adding a saturated solution of ammonium chloride to give 4-...

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Abstract

The invention discloses novel oxazolidine, a preparation method, application, and mono-component polyurethane waterproof paint. The novel oxazolidine is named as 4-mehtyl-3-(2-phenylcarbinol)-1,3-oxazolidine. The novel oxazolidine is used as a latent curing agent of the mono-component polyurethane waterproof paint. During the production process of the waterproof paint, the novel oxazolidine is added into the raw materials, one naked hydroxy group of the novel oxazolidine will react with the polyurethane prepolymer formed by the raw materials, thus the novel oxazolidine is grafted to the polyurethane prepolymer, and the novel oxazolidine (latent curing agent) can be more evenly dispersed in the waterproof paint. If the waterproof paint is stored for a long time, the grafted novel oxazolidine will be dissolved out continuously, the stability of the waterproof paint is improved, the latent curing effect is improved, and avoided is the phenomenon that the latent curing agent is precipitated from the mono-component polyurethane waterproof paint or the latent curing agent aggregates in the waterproof paint. After the waterproof paint is used, the quality of the film formed by the waterproof paint is improved.

Description

technical field [0001] The invention belongs to the technical field of polyurethane additives, and specifically relates to a novel oxazolidine, a preparation method, an application, and a single-component polyurethane waterproof coating. Background technique [0002] Polyurethane material is one of the most widely used materials with the best performance. It is divided into one-component polyurethane products and two-component polyurethane products in terms of composition. At present, the main application products of one-component polyurethane include one-component polyurethane adhesive, one-component polyurethane sealant, one-component polyurethane waterproof coating, etc. Compared with two-component polyurethane products, one-component polyurethane products eliminate the need for stirring steps, are easier to operate and construct, and do not need to add chain extenders such as Mocha, which are more environmentally friendly and in line with modern development concepts. ...

Claims

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Application Information

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IPC IPC(8): C07D263/04C08G18/28C09D175/08
CPCC07D263/04C08G18/2875
Inventor 李海章李红英段鹏飞韩海军
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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