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Preparation method and polyvinyl chloride composition of modified nanometer sio2

A technology of polyvinyl chloride and composition, applied in the field of industrial polymer materials, can solve the problems of the influence of resin mechanical properties, consumption, poor resin compatibility, etc., to achieve the improvement of flame retardant and anti-aging effect, and increase high temperature resistance. Anti-aging properties, the effect of improving strength

Inactive Publication Date: 2015-07-29
广州云森玩具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to SiO 2 The surface has strong polarity and hydrophilicity, poor compatibility with the resin, and the surface is slightly acidic, which will consume the peroxide used as a stabilizer and anti-aging agent, which greatly affects the mechanical properties of the resin

Method used

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  • Preparation method and polyvinyl chloride composition of modified nanometer sio2
  • Preparation method and polyvinyl chloride composition of modified nanometer sio2

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preparation example Construction

[0052] The present invention has no special limitation on the preparation method of the above-mentioned polyvinyl chloride composition, which can be prepared by methods well known to those skilled in the art. At the same time, the implementation steps of the present invention can use traditional plastic processing mixers and extruders, specifically: adding polyvinyl chloride, plasticizer and stabilizer according to the formula amount into the mixer and mixing at high speed for 30 minutes. Then the remaining components are put into the mixer according to the corresponding feeding ratio and mixed at a high speed, and then discharged into the twin-screw extruder to extrude and granulate to obtain a polyvinyl chloride resin with flame-retardant, smoke-suppressing and anti-aging properties.

[0053] The present invention utilizes "one pot method" to prepare modified nano-SiO 2 , so that the surface contains basic amino groups, which can neutralize the HCl produced by the degradatio...

Embodiment 1

[0061] At room temperature, ultrasonically dissolve 8 grams of P123 in 300 mL of 2.0 M HCl aqueous solution (61 g of concentrated hydrochloric acid is slowly dropped into water, and finally add water to 300 mL). Gram TEOS was slowly dropped from a constant pressure dropping funnel, and after the dropping was completed, it was placed in an oil bath at 40° C. for mechanical stirring and hydrolyzed for 1 hour, and then 5 g of KH550 was slowly added to another constant pressure dropping funnel solution. The resulting mixture solution was stirred in an oil bath at 40°C for 20 hours, then the stirring was stopped, aged at 90°C for 24 hours, and the obtained solid was filtered and dried in vacuum at 100°C for 12 hours. The collected solid was heated to reflux in 95% ethanol for 20 hours, and washed to prepare P123 as a template. Finally, filter, wash with water and ethanol until the pH is about 7, and dry in vacuum at 50°C for 6 hours to obtain the modified nano-SiO 2 , the resultin...

Embodiment 2

[0063] At room temperature, ultrasonically dissolve 8 grams of P123 in 300 mL of 2.0 M HCl aqueous solution (61 g of concentrated hydrochloric acid is slowly dropped into water, and finally add water to 300 mL). Grams of TEOS were slowly dropped from a constant pressure dropping funnel, and after the dropping was completed, placed in an oil bath at 40°C with mechanical stirring for 1 hour for hydrolysis, and then 10 grams of KH550 was slowly added to the solution in another constant pressure dropping funnel. The resulting mixture solution was stirred in an oil bath at 40°C for 20 hours, then the stirring was stopped, aged at 90°C for 24 hours, and the obtained solid was filtered and dried in vacuum at 100°C for 12 hours. The collected solid was heated to reflux in 95% ethanol for 20 hours, and washed to prepare P123 as a template. Finally, filter, wash with water and ethanol until the pH is about 7, and dry in vacuum at 50°C for 6 hours to obtain the modified nano-SiO 2 , the...

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Abstract

The invention provides a preparation method of modified nano SiO2 and a polyvinyl chloride (PVC) composition. The PVC composition comprises the following components in parts by weight: 100 parts of PVC, 10-40 parts of a first flame retardant, 10-30 parts of a second flame retardant, 10-50 parts of a plasticizer, and 1-5 parts of a stabilizer, wherein the second flame retardant is one or more of a boron-containing flame retardant, aluminum hydroxide and magnesium hydroxide. According to the invention, in the process of preparing the first flame retardant, a silane coupling agent is added for modifying, so that alkaline amino on the surface of the first flame retardant and HCl produced by neutralizing PVC degradation are used with the second flame retardant, therefore, the anti-flaming and anti-aging effects of the PVC composition are significantly increased; and on the other hand, by means of surface modification and dispersion, nano SiO2 aggregates are fully and uniformly dispersed in a material, and all combined with polymer chains so as to form a three-dimensional mesh, thereby improving the mechanical properties, high temperature resistance and aging resistance of the material.

Description

technical field [0001] The invention relates to the technical field of industrial polymer materials, in particular to a modified nano-SiO 2 Preparation method and polyvinyl chloride composition. Background technique [0002] Soft polyvinyl chloride (PVC) plastics have been widely used as insulation and sheath materials for low-voltage wires and cables because of their good physical, mechanical and electrical properties. In many applications, such as automotive cables, factory buildings, computer rooms, etc., wires and cables are required to have high flame retardant, low smoke and anti-aging properties. Polyvinyl chloride itself has high flame retardancy, and its oxygen index can reach 45. In order to improve the softness of the resin, a large amount of plasticizer is added to the soft PVC for wire and cable, which greatly reduces the flame retardancy of the resin. If caught fire, polyvinyl chloride will produce a lot of thick smoke, endangering the safety of life and prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/36C09C1/28C09C3/12C09C3/10C08K9/06C08K9/04C08L27/06C08K13/06
Inventor 魏亮翁挺吴晓伟
Owner 广州云森玩具有限公司
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