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Colloidal nano sulfur and sulfur colloidal nano encapsulation modification method

A nano-sulfur and colloidal technology, applied in the direction of microcapsule preparation, microsphere preparation, etc., can solve the problems of low powder sulfur fineness, easy electrostatic self-agglomeration, limited dispersion ability, etc., to reduce the powder fineness And the surface energy, the feeding method is flexible, and the effect of not being easy to early scorch

Active Publication Date: 2014-04-09
WUXI NO 2 RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fineness of powdered sulfur itself is not high, and its dispersing ability is limited in mixing; when the temperature of the rolling roll is high, the powdered sulfur is softened and agglomerated by heating; the chemical groups on the surface of powdered sulfur are easy to Astringent self-agglomeration, friction during processing in low temperature and humidity weather is likely to cause static self-agglomeration; processing methods are only suitable for kneading and mixing, low efficiency, and uneven dispersion. When black spots occur directly, it often causes the product to be scrapped

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a, with 80 parts by weight and particle size of sulfur powder of 48 ~ 75 μm, 8 parts by weight of liquid nitrile rubber, 5 parts by weight of triglyceride fatty acid ester, 4 parts by weight of monoglyceride fatty acid ester and 3 parts by weight of Zinc stearate is dropped into homogenizer and stirred evenly, obtains mixed raw material;

[0027] b. Put the mixed raw material obtained in step a into the reactor, control the temperature in the reactor at 75°C, control the pressure in the reactor at 0.1Mpa, and react for 25 to 30 minutes to obtain the mixed colloid;

[0028] c. Take out the mixed colloid obtained in step b and immediately grind it (i.e. carry out nano-encapsulation) to obtain a colloidal nano-sulfur semi-finished product;

[0029] d. Cooling the colloidal nano-sulfur semi-finished product obtained in step c to room temperature to obtain the colloidal nano-sulfur finished product.

[0030] The colloidal fineness of the colloidal nano-sulfur finished produ...

Embodiment 2

[0032] a, 75 parts by weight of sulfur powder with a particle size of 48 to 75 μm, 9 parts by weight of liquid nitrile rubber, 6 parts by weight of triglyceride fatty acid ester, 6 parts by weight of monoglyceride fatty acid ester and 4 parts by weight of Zinc stearate is dropped into homogenizer and stirred evenly, obtains mixed raw material;

[0033] b. Put the mixed raw materials obtained in step a into the reactor, control the temperature in the reactor at 100°C, control the pressure in the reactor at 0.3Mpa, and react for 20 to 25 minutes to obtain the mixed colloid;

[0034] c. Take out the mixed colloid obtained in step b and immediately grind it (i.e. carry out nano-encapsulation) to obtain a colloidal nano-sulfur semi-finished product;

[0035] d. Cooling the colloidal nano-sulfur semi-finished product obtained in step c to room temperature to obtain the colloidal nano-sulfur finished product.

[0036] The colloidal fineness of the colloidal nano-sulfur finished prod...

Embodiment 3

[0038] a, 70 parts by weight and particle size of sulfur powder of 48 ~ 75 μm, 10 parts by weight of liquid nitrile rubber, 7 parts by weight of triglyceride fatty acid ester, 8 parts by weight of monoglyceride fatty acid ester and 5 parts by weight of Zinc stearate is dropped into homogenizer and stirred evenly, obtains mixed raw material;

[0039] b. Put the mixed raw material obtained in step a into the reactor, control the temperature in the reactor at 150°C, control the pressure in the reactor at 0.4 Mpa, and react for 15 to 20 minutes to obtain the mixed colloid;

[0040] c. Take out the mixed colloid obtained in step b and immediately grind it (i.e. carry out nano-encapsulation) to obtain a colloidal nano-sulfur semi-finished product;

[0041] d. Cooling the colloidal nano-sulfur semi-finished product obtained in step c to room temperature to obtain the colloidal nano-sulfur finished product.

[0042] The colloidal fineness of the colloidal nano-sulfur finished product...

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Abstract

The invention discloses a colloidal nano sulfur and a sulfur colloidal nano encapsulation modification method. The colloidal nano sulfur comprises the following components: 70 to 80 parts by weight of sulfur, 8 to 10 parts by weight of liquid nitrile rubber, 5 to 7 parts by weight of triglycerin fatty acid ester, 4 to 8 parts by weight of fatty acid monoglyceride and 3 to 5 parts by weight of zinc stearate. The sulfur colloid nano encapsulation modification method comprises steps of mixing, reaction, grinding and cooling. The powder sulfur modified capsule nano colloid provided by the invention can comprehensively improve the dispersion of mixing rubber material and ensure product molding sulfuration to form a homogeneous three-dimensional cross-linked structure elastomer. The feeding mode is flexible and suitable for production processes of different product rubber compounds; and the colloidal nano sulfur is an indispensable crosslinking auxiliary agent for modern rubber formula and efficient production process.

Description

technical field [0001] The invention discloses a colloidal nano-sulfur, and also discloses a sulfur colloidal nano-encapsulation modification method. Background technique [0002] Powdered sulfur is the most widely used traditional cross-linking agent in rubber formulations. The appearance of domestic powdered sulfur is light yellow powder with a fineness of 200-300 mesh (48-75μm) and a melting point of 112.8°C. There are other chemical groups. The fineness of powdered sulfur itself is not high, and its dispersing ability is limited in mixing; when the temperature of the rolling roll is high, the powdered sulfur is softened and agglomerated by heating; the chemical groups on the surface of powdered sulfur are easy to Astringent self-agglomeration, friction during processing in low temperature and humidity weather is likely to cause static self-agglomeration; processing methods are only suitable for kneading and mixing, low efficiency, and uneven dispersion. When black spot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08K13/02C08K3/06C08K5/103C08K5/098B01J13/02
Inventor 赵德平孙晓明
Owner WUXI NO 2 RUBBER
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