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Novel method and special device for removing solvents from chlorosulfonated polyethylene adhesive liquid

A technology of chlorosulfonated polyethylene and special equipment, which is applied in the direction of reagents, educts, products, etc., can solve the problems of large investment in equipment, and achieve the effects of high drying efficiency, simple equipment, and high solvent recovery rate

Inactive Publication Date: 2017-05-10
江西虹润化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires two steps to complete the thorough drying, and the investment in equipment is large.

Method used

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  • Novel method and special device for removing solvents from chlorosulfonated polyethylene adhesive liquid
  • Novel method and special device for removing solvents from chlorosulfonated polyethylene adhesive liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] After raising the surface temperature of the open stainless steel twin rolls to 160°C, put 8% CSM / CCl 4 The glue solution is introduced into the V-shaped groove formed by the above-mentioned double rollers, and the gap between the two rollers is adjusted to 0.1 mm. The rotating speed of the two rollers is 2r / min. After the surface of the steel roller forms a dry film-like coating, the film is obliquely cut with a knife, and quickly coated on the counter-rotating cooling roller, collected and drawn to the traction wheel. The traction rate is 3.7m / min, you can get a white CSM finished product.

[0042] The CSM finished product is refined into rubber compound with the basic formula components, and the formula components are as follows:

[0043] name Specification Formula (g) CSM 40 100 magnesium oxide 150 4 Antiaging agent NBC 1 carbon black 550 40 Accelerator pentaerythritol 3 Accelerator TRA 2

Embodiment 2

[0045] The equipment and operation method used are the same as in Example 1, only the surface temperature of the double rollers is changed to 130°C.

Embodiment 3

[0047] The equipment used and the operation method are the same as Example 1, but the rotating speed of the twin rollers is changed to 4r / min.

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Abstract

The invention relates to a novel method and a special device for removing solvents from chlorosulfonated polyethylene (CSM) adhesive liquid. Adhesive liquid films can be obtained by means of open type normal-pressure flash evaporation drying (instant solvent flash evaporation) and can be quickly cooled (for preventing yellowing). The novel method includes directly leading the adhesive liquid into the surfaces of open type metal double rolls after CSM is completely synthesized by the aid of solution processes; carrying out flash evaporation on the solvents by the aid of the instant high temperature and the normal pressure; quickly cooking the films by the aid of cooling rolls to obtain film-shaped CSM products. The novel method and the special device have the advantages that technical difficult problems in the aspect of sealing and technical difficult problems of easiness in local adhesive burning, adhesive twining, adhesive sticking and the like can be solved by the normal-pressure open type double-roll device, vacuum can be omitted, equipment is simple, the solvents are high in recycling rate, the novel method and the special device are high in drying efficiency and can be widely applied to drying heat-sensitive and high-adhesiveness substances such as chloroprene rubber, chlorinated natural rubber and CSM rubber, and the like.

Description

technical field [0001] The invention relates to the technical field of solvent removal from polymer solutions, in particular to a new method for removing solvent from chlorosulfonated polyethylene (CSM) glue—open type, normal pressure flash drying glue film (solvent instant flash evaporation) ), the resulting film is rapidly cooled (anti-yellowing); and the structure and parameters of the special device (open, atmospheric pressure metal double-roller flash dryer) are described. Background technique [0002] After the solution synthesis of chlorosulfonated polyethylene (CSM), the solvent needs to be removed to obtain a dry product. At present, the post-treatment methods of glue desolventization and drying are mainly divided into the following three types: [0003] (1) wet steam stripping [0004] This method is to disperse the glue solution in hot water, blow into water vapor to strip away the solvent (such as CCl 4 ), the glue is coagulated in a single or multiple kettles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/38C08F110/02
CPCC08F8/38C08F110/02Y02P20/141
Inventor 李铁斌秦晓春
Owner 江西虹润化工有限公司