A kind of devolatilization method and equipment of thermoplastic elastomer

A thermoplastic elastomer, a first-class technology, applied in the field of post-treatment devolatilization of thermoplastic elastomers, can solve the problems of large equipment occupation, small bulk density, unstable volatile index control, etc., to prevent loss and smooth feeding Effect

CN104339469BActive Publication Date: 2016-08-10PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-08-10

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Abstract

The invention relates to a devolatilization method and equipment of thermoplastic elastomers. Water colloidal particles after the vibration dehydration are directly fed in a conical centrifugal dryer of a primary drying station for devolatilizing; dry colloidal particles after the devolatilization are fed in a pelletizing station, are pelletized by a screw extruder, and are fed in a conical centrifugal dryer of a secondary drying station for further drying; the drying hot wind temperature is 40-120 DEG C, and the wind volume is 10-600 L / s; the extruding temperature of the screw extruder is 100-200 DEG C, and the extruding pressure is 1-10 MPa; screen holes are formed in the screen surface of the conical centrifugal dryer for drying; small screen ports are connected with a driving bearing, and large screen ports are connected with a driven bearing; the driving bearing is driven through power equipment to rotate; and the conical centrifugal dryers are additionally provided with hot wind pipes, exhaust ports, cleaning ports and liquid level tanks. The method has such advantages as short technological process, less equipment floor, thorough devolatilization, stable index control, low content of product gels and large bulk density.
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Description

technical field

[0001] The invention relates to a post-treatment devolatilization method and equipment for thermoplastic elastomers, mainly including vibration dehydration, primary drying, granulation, secondary drying and other processes. Background technique

[0002] Thermoplastic elastomer (TPE) is a polymer material between rubber and resin. It can not only replace part of rubber, but also modify plastic. The dual properties and broad characteristics of rubber and plastics possessed by thermoplastic elastomers make them widely used in the rubber industry to manufacture daily-use products such as rubber shoes, rubber cloths, rubber hoses, tapes, rubber strips, rubber plates, rubber parts and adhesives, etc. Various industrial supplies. At the same time, thermoplastic elastomers can also be used in large quantities instead of rubber in the modification of general thermoplastic resins such as PVC, PE, PP, PS, and even engineering plastics such as PU, PA, and CA.

[0003] ...

Examples

Embodiment 1

[0058] Take the horizontal conical centrifugal sieve as an example to describe it in detail.

[0059] A star-shaped SBS glue with a weight average molecular weight of 300,000, a block ratio of 30 / 70, and a vinyl content of 16% (m / m) was obtained by polymerization. The glue contained 82% (m / m) of cyclopentane and 18% (m / m) polymer molecule. The glue passes through the water precipitation coagulation section A, and after the cyclopentane is cooked and removed, very fluffy colloidal particles are obtained, and these colloidal particles contain 85% (m / m) of water and a small amount of solvent. The colloidal particles are first sent to the vibration dewatering section B for preliminary water removal, so that the volatile content is reduced to about 51% (m / m).

[0060] The hydrocolloid particles 10 sent from the vibration dewatering section B are sent to the primary drying section C at a delivery rate of 55kg / min, the pressure balancer 9 is activated, and the air is blown to the le...

Embodiment 2

[0064] Take the vertical conical centrifugal sieve as an example to describe in detail.

[0065] The polymerization reaction obtained a syndiotactic 1,2-polybutadiene glue solution with a weight average molecular weight of 410,000, a syndiotactic degree of 72%, and a 1,2-structure content of 83%. The glue solution contained 84% (m / m) Cyclohexane and 16% (m / m) polymer molecules. The glue passes through the water precipitation coagulation section A, and after the cyclohexane is cooked and removed, very fluffy colloidal particles are obtained, which contain 75% (m / m) of water and a small amount of solvent. The colloidal particles are first sent to the vibration dewatering section B for preliminary water removal, so that the volatile matter content is reduced to about 45% (m / m), and the water colloidal particles sent by the vibration dewatering section B are sent to the primary drying section Dry in a vertical conical centrifugal dryer in C.

[0066]Vertical conical centrifugal...