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A kind of preparation method of environment-friendly cold-resistant polyvinyl chloride elastomer composition

A polyvinyl chloride and elastomer technology, applied in the field of materials, can solve the problems of high raw material cost of diethylene glycol dibenzoate plasticizer, the influence of elastomer normal temperature toughness and low temperature toughness, and unsatisfactory low temperature resistance, etc. , achieve excellent plasticizing effect, good heat aging resistance, and improve room temperature toughness

Active Publication Date: 2019-03-26
JIANGSU XINGHUA RUBBER BELT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the toughening agent used in the patent application number CN201310473887.1 is silicone rubber, which has poor compatibility with the polyvinyl chloride matrix, which affects the normal temperature toughness and low temperature toughness of the elastomer, and the low temperature resistance is not ideal.
The application number is CN201210161975.3, which discloses a cold-resistant and environment-friendly polyvinyl chloride-based special cable material. The diethylene glycol dibenzoate plasticizer used is high in raw material cost, which limits its application in the civil range.

Method used

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  • A kind of preparation method of environment-friendly cold-resistant polyvinyl chloride elastomer composition
  • A kind of preparation method of environment-friendly cold-resistant polyvinyl chloride elastomer composition

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preparation example Construction

[0029] The present invention also provides a preparation method of the above-mentioned environment-friendly and cold-resistant polyvinyl chloride elastomer composition, comprising the following steps:

[0030] Step 1: Stir and mix each component in a kneader evenly, and use the friction heat generated by stirring to raise the temperature of the mixture;

[0031] Step 2: After the temperature of the mixture of the components in the kneader rises to 90-100°C, the material is discharged, and then sent to the cooling agitator to cool to below 45°C;

[0032] Step 3: Put the cooled mixture on a two-stage screw extruder to extrude the material. The two-stage screw extruder includes a twin-screw extruder and a single-screw extruder. The twin-screw extruder four The temperatures of each heating zone and the extrusion die are respectively: T1=85~100°C, T2=100~120°C, T3=120~140°C, T4=130~150°C, T die=130~150°C; The temperatures of the heating zone and the extrusion die of the single-scr...

Embodiment 1

[0034]With the polyvinyl chloride resin of 100 weight parts, the dioctyl terephthalate of 75 weight parts, the epoxy soybean oil of 25 weight parts, the polyurethane rubber of 10 weight parts, the nano active calcium carbonate of 15 weight parts, 5 weight parts Calcium-zinc composite stabilizer, 1.5 parts by weight of zinc stearate, 0.6 parts by weight of four [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and 1 part by weight of The high-pigment carbon black is stirred and mixed at high speed in the kneader. The frictional heat generated by the stirring makes the temperature of the mixed material rise to 90-100°C, and then the material is discharged. The material is extruded and granulated on a twin-screw extruder, wherein the temperatures of the four heating zones of the twin-screw extruder and the extrusion die are respectively: T 1 =85~100℃, T 2 =100~120℃, T 3 =120~140℃, T 4 =130~150℃, T 模 =130-150°C; the temperatures of the heating zone and e...

Embodiment 2

[0036] With the polyvinyl chloride resin of 100 weight parts, the diheptyl terephthalate of 90 weight parts, the epoxy group esterified linseed oil of 10 weight parts, the ethylene-vinyl acetate copolymer of 20 weight parts (vinyl acetate weight percent 40%), 5 parts by weight of nano-active calcium carbonate, 8 parts by weight of calcium-zinc composite stabilizer, 1 part by weight of polyethylene wax, 0.2 parts by weight of tetrakis [β-(3,5-di-tert-butyl- 4-hydroxyphenyl) propionic acid] pentaerythritol ester and 3 parts by weight of rutile titanium dioxide are stirred and mixed at high speed in a kneader. The cooling mixer is cooled to below 45°C, and then the cooled mixture is extruded on a twin-screw extruder for granulation, where the temperatures of the four heating zones of the twin-screw extruder and the extrusion die are: T 1 =85~100℃, T 2 =100~120℃, T 3 =120~140℃, T4 =130~150℃, T 模 =130-150°C; the temperatures of the heating zone and extrusion die of the single-s...

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Abstract

The invention discloses a preparation method of an environment-friendly and cold-resistant polyvinyl chloride elastomer composition. Polyvinyl chloride resin, dialkyl terephthalate, synthetic vegetable oil ester, polar rubber, nano-active calcium carbonate, calcium-zinc Composite stabilizers, lubricants, antioxidants and pigments are mixed in a kneader, and after the temperature of the mixture reaches 90-100°C, the material is discharged and cooled, and then the cooled mixture is placed on a double-stage screw extruder to extrude and granulate The elastomer composition has a Shore hardness of less than 80 at -5°C. The beneficial effect of the present invention is that it has the advantages of excellent low-temperature toughness, high mechanical strength, good heat aging resistance, environmental protection and non-toxicity, and excellent comprehensive performance, and is especially suitable for preparing elevator balance compensation chain sheaths, door and window seals, and electric wires and cables. insulation sheath, etc.

Description

【Technical field】 [0001] The invention relates to the field of materials, in particular to a preparation method of an environment-friendly cold-resistant polyvinyl chloride elastomer composition. 【Background technique】 [0002] Polyvinyl chloride elastomer has the characteristics of low price, adjustable mechanical properties and good flame retardancy. It is suitable for many occasions such as preparing elevator balance compensation chain sheaths, insulating sheaths for wires and cables, and door and window seals. However, polyvinyl chloride elastomers have certain defects in terms of environmental protection and low-temperature toughness. [0003] So far, many patents have reported the composition and preparation methods of low-temperature-resistant or cold-resistant polyvinyl chloride elastomer materials. For example, the application numbers are CN201210569416.6, CN201410284632.5, CN200810023863.5 and other Chinese patents. Although the polyvinyl chloride elastomer mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L75/04C08L23/08C08L33/04C08K13/02C08K5/12C08K5/1515C08K3/26C08K5/098C08K5/134C08K3/04B29C48/92
CPCC08K3/26C08K5/098C08K13/02C08L27/06C08L31/04C08L33/08C08L75/04
Inventor 王庚超魏伟黄近都毛亮
Owner JIANGSU XINGHUA RUBBER BELT
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