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Viscosity reducer for chlorinated natural rubber water-based paint and preparation method thereof

A technology of chlorinated natural rubber and water-based coatings, applied in the direction of rubber derivative coatings, coatings, etc., can solve the problems of uniform dispersion, inability to break emulsion particles, not a kind of stability, etc., and achieve the effect of high-efficiency viscosity reduction

Active Publication Date: 2021-01-19
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It should be noted that in the chlorinated natural rubber emulsion described in documents CN106459595A and CN107474637A, chlorinated natural rubber exists in the form of emulsion, and the emulsion is not in a stable state in thermodynamics, that is, adding auxiliary agent to the chlorinated natural rubber emulsion , easy to cause demulsification behavior (that is, the chlorinated natural rubber emulsion particles cannot be uniformly dispersed in water, resulting in phase separation), resulting in the failure of the preparation of chlorinated natural rubber water-based coatings

Method used

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  • Viscosity reducer for chlorinated natural rubber water-based paint and preparation method thereof
  • Viscosity reducer for chlorinated natural rubber water-based paint and preparation method thereof
  • Viscosity reducer for chlorinated natural rubber water-based paint and preparation method thereof

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Embodiment 1

[0028] Present embodiment is used for the preparation method of the viscosity reducer of chlorinated natural rubber water-based paint, and concrete steps are as follows:

[0029] (1) Take a certain amount of Mg(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 9H 2 O dissolves in the removed CO 2 Solution A was prepared in deionized water, Mg(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 9H 2 The ratio of O and deionized water is 2:1:13;

[0030] (2) Add sodium lignosulfonate to the solution A prepared in step (1), stir for 5 minutes at 22°C, and the stirring speed is 1000rpm, then add 1.0mol / L NaOH solution dropwise to the mixed solution while stirring to adjust Mixed solution pH to 8.0, obtain mixed solution B, wherein sodium lignosulfonate and Fe(NO in mixed solution B 3 ) 3 9H 2 O The ratio of the amount of both substances is 3.5:1;

[0031] (3) Nitrogen was passed through the mixture B obtained in step (2) for 5 minutes, then the mixture was placed in a closed container, and the closed...

Embodiment 2

[0033] Present embodiment is used for the preparation method of the viscosity reducer of chlorinated natural rubber water-based paint, and concrete steps are as follows:

[0034] (1) Take a certain amount of Mg(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 9H 2 O dissolves in the removed CO 2 Solution A was prepared in deionized water, Mg(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 9H 2 The ratio of O and deionized water is 2.5:1:20;

[0035] (2) Add sodium lignosulfonate to the solution A prepared in step (1), stir for 20 minutes at 23°C, and the stirring speed is 2000rpm, then add 2.0mol / L NaOH solution dropwise to the mixed solution while stirring to adjust Mixed solution pH to 8.5, obtain mixed solution B, wherein the sodium lignosulfonate and Fe(NO in mixed solution B 3 ) 3 9H 2 O The ratio of the amount of both substances is 3:1;

[0036] (3) Nitrogen was passed through the mixed solution B obtained in step (2) for 8 minutes, then the mixed solution was placed in a closed contai...

Embodiment 3

[0038] Present embodiment is used for the preparation method of the viscosity reducer of chlorinated natural rubber water-based paint, and concrete steps are as follows:

[0039] (1) Take a certain amount of Mg(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 9H 2 O dissolves in the removed CO 2 Solution A was prepared in deionized water, Mg(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 9H 2 The ratio of O and deionized water is 3.5:1:25;

[0040] (2) Add sodium lignosulfonate to the solution A prepared in step (1), stir for 40 minutes at 24°C, and the stirring speed is 3000rpm, then add 3.0mol / L NaOH solution dropwise to the mixed solution while stirring to adjust Mixed solution pH to 9.0, obtain mixed solution B, wherein the sodium lignosulfonate and Fe(NO in mixed solution B 3 ) 3 9H 2 O The ratio of the amount of both substances is 3.2:1;

[0041] (3) Nitrogen was passed through the mixed solution B obtained in step (2) for 10 minutes, then the mixed solution was placed in a closed con...

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Abstract

The invention provides a viscosity reducer for chlorinated natural rubber waterborne paint. The viscosity reducer is obtained by taking Mg(NO3)2.6H2O, Fe(NO3)3.9H2O and sodium lignosulfonate as the raw materials, and under pH of 8.0-10.5 and a temperature of 90-110DEG C, carrying out reaction for 6-36h. The viscosity reducer is a lignosulfonate radical-magnesium iron hydrotalcite compound, and thelignosulfonate radical anions in the compound are embedded into the magnesium iron hydrotalcite inorganic laminates. The lignosulfonate radical-magnesium iron hydrotalcite compound can destroy a hydrogen bond network system between chlorinated natural rubber and inorganic filler so as to effectively reduce the viscosity of chlorinated natural rubber waterborne paint, and at the same time does notcause demulsification and phase separation of chlorinated natural rubber waterborne paint.

Description

Technical field: [0001] The invention provides a viscosity reducer for chlorinated natural rubber water-based paint and a preparation method of the viscosity reducer, which belongs to the technical field of viscosity reducer. Background technique: [0002] Due to the outstanding advantages of water-based coatings in terms of environmental protection, the application of water-based coatings in the field of coatings has been expanding in the past ten years, and has replaced many commonly used solvent-based coatings. Waterborne coatings are composed of film formers, pigments and fillers and additives. Chlorinated natural rubber is one of the main film-forming agents for the manufacture of anti-corrosion coatings. The chlorinated natural rubber film-forming material has extremely low permeability to water and oxygen, resistance to general acid and alkali corrosion, high hardness, and good flame retardancy, etc. features. Because chlorinated natural rubber is insoluble in water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/61C09D7/65C09D115/02
CPCC09D115/02C09D7/61C09D7/65
Inventor 李文卓范容莉罗睿轶刘泽瑜黄帅宇张昱超李仙
Owner NANJING FORESTRY UNIV
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