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A kind of method of coagulation of polyolefin glue

A polyolefin glue and polyolefin technology, applied in the field of polyolefin glue coagulation, can solve the problems of poor glue coagulation effect and large amount of dispersant, and achieve the effects of preventing caking and foaming

Active Publication Date: 2017-06-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the defects in the prior art that the amount of dispersant used in the coagulation process of polyolefin glue is too large and the coagulation effect of the glue is poor, so as to provide a coagulation method of polyolefin glue

Method used

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  • A kind of method of coagulation of polyolefin glue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This example is used to illustrate the polyolefin glue coagulation method of the present invention.

[0058] (1) Preparation of polyisoprene glue

[0059] The polymerization device includes 3 stainless steel reaction kettles with a volume of 120L connected in series. Under stirring, continuously add isoprene, neodymium-based catalyst and hexane into the first kettle, the molar ratio of isoprene to neodymium-based catalyst is 1:0.00015, and the concentration of isoprene monomer is 17% by weight , the temperature is 30°C, and the pressure is 0.4MPa; add 20°C of hexane in the second kettle and the third kettle respectively, so that the concentration of isoprene monomer in the two kettles is respectively 15% by weight and 13% by weight, and the reaction materials are in The residence time in the first kettle was 50 minutes to obtain polyisoprene glue. After analysis, the content of polyisoprene in the glue solution was 13% by weight.

[0060] (2) Coagulation of polyisopr...

Embodiment 2

[0065] This example is used to illustrate the polyolefin glue coagulation method of the present invention.

[0066] (1) Preparation of polyisoprene glue

[0067] The same method as in Example 1 was used to prepare polyisoprene glue. The difference is that the residence time of the glue solution in the first kettle is 52 minutes. After analysis, the content of polyisoprene in the glue solution is 13.2% by weight.

[0068] (2) Coagulation of polyisoprene glue

[0069] The polyisoprene glue is sent to the termination tank, and the antioxidant 264 (0.6% by weight of the dry rubber mass) and the water emulsion with the dispersant B content of 10% by weight are added to the termination tank under stirring, and the addition amount of the water emulsion is 2.5kg / h, and the dispersant B is sorbitan fatty acid (0.3% by weight of the dry glue mass), and after mixing evenly, the mixed glue solution obtained is sent to the coagulation system.

[0070] The coagulation of mixed glue adopt...

Embodiment 3

[0073] This example is used to illustrate the coagulation method of the polyisoprene glue of the present invention.

[0074] The polymerization device includes 3 reactors with a volume of 120 L connected in series. Under stirring, continuously add isoprene, neodymium-based catalyst and hexane into the first kettle, the molar ratio of isoprene to neodymium-based catalyst is 1:0.00017, and the concentration of isoprene monomer is 17% by weight , the temperature is 35° C., and the pressure is 0.5 MPa; respectively add 25° C. of hexane in the second kettle and the third kettle, so that the concentration of isoprene monomer in the two kettles is respectively 15% by weight and 13% by weight, and the reaction materials are in The residence time in the first kettle was 45 minutes to obtain polyisoprene glue. After analysis, the content of polyisoprene in the glue solution was 12.9% by weight.

[0075] (2) Coagulation of polyisoprene glue

[0076] The polyisoprene glue is sent to th...

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Abstract

The invention discloses a polyolefin glue solution agglomeration method. The method comprises the following steps: 1, contacting a polyolefin glue solution from a polymerization kettle with a water-insoluble dispersant in a termination kettle to obtain a mixed glue solution; and 2, contacting the mixed glue solution obtained in step 1 with a water-soluble dispersant in an agglomeration kettle, wherein the dosage of the water-insoluble dispersant is 0.1-1wt% of the mass of the dry glue of the polyolefin glue solution, and the dosage of the water-soluble dispersant is 0.002-0.02wt% of the mass of the dry glue of the polyolefin glue solution. A small amount of dispersants used in the polyolefin glue solution agglomeration method have an agglomerated glue solution foaming effect and also have a glue solution dispersing effect. Finished rubber (raw rubber) prepared after the agglomeration has the advantages of small content of volatile compounds and high storage stability.

Description

technical field [0001] The invention relates to a method for agglomerating polyolefin glue. Background technique [0002] Industrialized commodity isoprene rubber is similar to natural rubber in structure, has excellent raw rubber strength and vulcanized rubber properties, and meets the development needs of high-performance tires in terms of high speed, energy saving, safety, and environmental protection. The production process of isoprene rubber includes: after the polymerization of isoprene is completed, various additives are added to the glue, mixed evenly, and then transported to the coagulation system for coagulation. The glue is condensed into water colloidal particles, and then after post-processing and briquetting, it becomes commercially available rubber. However, many synthetic rubbers have large molecular weight, low degree of branching, and very high viscosity of the glue solution, which brings difficulties to the coagulation process. [0003] The addition of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C1/15
Inventor 辛益双孙伟徐林谭金枚赵姜维张杰程实董江舟
Owner CHINA PETROLEUM & CHEM CORP