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Preparation method for polyvinyl chloride resin used for flame-retardant cable

A polyvinyl chloride resin and flame-retardant cable technology, which is applied in the field of polyvinyl chloride resin preparation, can solve the problem of reducing the mechanical properties and flame-retardant properties of polyvinyl chloride cable materials, uneven dispersion of flame retardants, and failure to meet high flame-retardant requirements. Performance product application and other issues, to achieve the effect of good heat resistance, improved dispersion performance, and regular shape

Active Publication Date: 2012-05-02
XINJIANG TIANYE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is uneven dispersion of flame retardants in PVC resin, which reduces the mechanical properties and flame retardancy of PVC cable materials.
With the strengthening of domestic scientific research strength, the development of functional additives used in polyvinyl chloride, the technical improvement of production processes, equipment and other factors, the flame retardant performance of flame retardant cable polyvinyl chloride has been improved to a certain extent, but it cannot meet the needs of high flame retardant Applications on performance products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] With deionized water 14kg, vinyl chloride monomer 5kg, initiator cumyl peroxyneodecanoate and diethylhexyl peroxydicarbonate 5g, high degree of alcoholysis polyvinyl alcohol / hydroxypropyl methylcellulose / Low degree of alcoholysis polyvinyl alcohol ternary composite dispersant 7g, stabilizer organotin and liquid zinc 2.73g, new flame retardant 250g, ammonium bicarbonate 3.52g, chain extender triallyl cyanurate 4.5g Add 8.7g of EDTA and 8.7g of EDTA into the polymerization kettle, stir at room temperature for 30min, heat up to 58±0.5°C for polymerization, react for 6 hours, reduce the pressure by 0.1MPa, add a terminator to complete the polymerization, and obtain polyvinyl chloride resin for flame-retardant cables. suspension.

[0019] Removing unreacted monomers, discharging, filtering, and drying to obtain polyvinyl chloride resin for flame-retardant cables.

[0020] The viscosity number of the resin is 138, the apparent density is 0.54g / ml, the plasticizer absorptio...

Embodiment 2

[0022] With deionized water 14kg, vinyl chloride monomer 5kg, initiator cumyl peroxyneodecanoate and diethylhexyl peroxydicarbonate 5g, high degree of alcoholysis polyvinyl alcohol / medium alcoholysis degree polyvinyl alcohol / Low degree of alcoholysis polyvinyl alcohol ternary composite dispersant 7g, stabilizer organotin and liquid zinc 2.73g, new flame retardant 250g, ammonium bicarbonate 3.52g, chain extender triallyl cyanurate 4.5g Add 8.7g of EDTA and 8.7g of EDTA into the polymerization kettle, stir at room temperature for 30min, heat up to 58±0.5°C for polymerization, react for 6 hours, reduce the pressure by 0.1MPa, add a terminator to complete the polymerization, and obtain polyvinyl chloride resin for flame-retardant cables. suspension.

[0023] Removing unreacted monomers, discharging, filtering, and drying to obtain polyvinyl chloride resin for flame-retardant cables.

[0024] The viscosity number of the resin is 138, the apparent density is 0.52g / ml, the plastic...

Embodiment 3

[0026] With deionized water 14kg, vinyl chloride monomer 5kg, initiator cumyl peroxyneodecanoate and diethylhexyl peroxydicarbonate 5g, high degree of alcoholysis polyvinyl alcohol / hydroxypropyl methylcellulose / Low alcoholysis polyvinyl alcohol ternary composite dispersant 5g, stabilizer organotin and liquid zinc 2.73g, new flame retardant 250g, ammonium bicarbonate 3.52g, chain extender triallyl cyanurate 4.5g Add 8.7g of EDTA and 8.7g of EDTA into the polymerization kettle, stir at room temperature for 30min, heat up to 58±0.5°C for polymerization, react for 6 hours, reduce the pressure by 0.1MPa, add a terminator to complete the polymerization, and obtain polyvinyl chloride resin for flame-retardant cables. suspension.

[0027] Removing unreacted monomers, discharging, filtering, and drying to obtain polyvinyl chloride resin for flame-retardant cables.

[0028] The viscosity number of the resin is 138, the apparent density is 0.52g / ml, the plasticizer absorption rate is 2...

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Abstract

The invention relates to a formula and a production technology of polyvinyl chloride resin used for a flame-retardant cable. A suspending polymerization method is adopted and comprises the following steps: adding a vinyl chloride monomer, a stabilizing agent, a dispersing agent, a novel fire retardant, a chain extender, auxiliaries and de-ionized water into a polymerization kettle; cold stirring for 30 minutes; reacting for 5-6.5 hours at 50-60 DEG C; and after reducing pressure for 0.1 MPa, adding a terminator, thereby obtaining a water suspending solution of the polyvinyl chloride resin for the flame-retardant cable. The unreacted vinyl chloride monomer is removed, and centrifugal drying is performed, thereby obtaining an end product. The polyvinyl chloride resin used for the flame-retardant cable produced according to the production technology has the advantages that the form of grains in the product is regular, the plasticizing property is excellent, the mobility of flux is high, the additional fire retardant is unnecessary in the formula of the product, and the flame retardation of a material is obviously promoted. The product is mainly applied to the material with high demand on flame retardation, such as electric wires and cables, and the like.

Description

Technical field: [0001] The invention relates to a preparation method of polyvinyl chloride resin, in particular to a preparation method of polyvinyl chloride resin used in the production of flame-retardant cables. Background technique: [0002] Insulation layers and sheaths for wire and cable require materials with good mechanical and physical properties, excellent electrical properties, good flame retardancy, light resistance, chemical resistance, cold resistance, oil resistance, etc., especially for flexibility. At present, the general-purpose polyvinyl chloride resin used in the processing of cable materials has a large molecular weight, high requirements for plasticizing temperature, and poor resin fluidity during extrusion processing. Therefore, in the processing of cable sheaths, general-purpose resins and Various functional additives such as plasticizers and flame retardants are physically mixed, through high-speed kneading, low-speed cold stirring, extrusion and gra...

Claims

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Application Information

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IPC IPC(8): C08F214/06C08F2/44C08F2/20C08K3/22
Inventor 宋晓玲黄东贺盛喜王祖芳孙玉军沈姗姗徐晓萍魏东
Owner XINJIANG TIANYE GRP
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