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Organosilicon-modified PVC composite material

A composite material and silicone technology, applied in the field of silicone modified PVC composite materials, can solve the problems of poor controllability of the graft rate and crosslinking density of PVC materials, difficulty in obtaining silicone modified PVC materials, and poor compatibility. , to achieve the effect of excellent low temperature resistance, long service life and stable performance

Active Publication Date: 2017-02-08
河北厚丰有机硅制品股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silicone materials have poor compatibility with PVC, and are easy to separate phases, making it difficult to obtain silicone-modified PVC materials with stable performance.
In order to overcome this problem, some researchers use organosiloxanes such as vinyl siloxane, amino siloxane and mercapto siloxane to graft PVC first, and then hydrolyze and crosslink to improve the thermal stability and tensile properties of PVC. Performance and other properties [Lewis J.T., Collins D., Malani C., rosslinkable silane-malified PVC, British Patent: 139248, 1969; Saam J. C., Thomas B., Crosslinkable organosilane-vinyl chloride copolymer, British Patent: 1485263, 1973; Kelnar I, Schatz M. Silane Cross-linking of PVC.Ⅱ. Influence of Silane Type and Conditions on Crosslinking by water, J. Appl. Polym. Sci..1993, 48:669-676], but the grafting rate and cross-linking Joint density controllability is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Add 1000 g of trimethylbenzene, 400 g of deionized water and 58.8 g of 0.1 mol / L trifluoromethanesulfonic acid into a 3 L clean three-necked flask, add dropwise from 39.5 g acryloyloxytrimethylsilane, 208 g ethyl orthosilicate, 240 g dimethyldiethoxysilane, 100 g methyltrimethoxysilane and 16.2 g hexamethyldisiloxane, dropwise After completion, the temperature was raised to 40 °C for 4 h, and the layers were separated. After the oil phase was washed to neutrality, the organic solvent and low molecular weight were removed under reduced pressure at 180 °C / 20 mm Hg to obtain 260 g of acryloyloxy-containing Silicone polymer material.

[0022] (2) Take 100g of the vinyl-terminated, acryloyloxy-containing silicone polymer material obtained in (1), 1000g of PVC and 11g of azobisisobutyronitrile, and react at 80°C for 12 hours to obtain the silicone polymer Modified PVC.

[0023] (3) 60 g of silicone polymer modified PVC obtained in step (2), 5 g of nano-calcium carbonate...

Embodiment 2

[0026] (1) Add 500 g of toluene, 250 g of deionized water and 50 g of 1 mol / L H in a 3 L clean three-neck flask 2 SO 4 Aqueous solution, under stirring at 40 ℃, began to drop 24.8g of methacryloxypropyltrimethoxysilane, 208g of methyl orthosilicate, 240g of dimethyldiethoxysilane, 360g of methylbenzene Dimethoxysilane, 204 g methyltrimethoxysilane, and 8.6 g tetramethyldivinyldisiloxane were added dropwise within 0.5 to 1 h, and the temperature was raised to 78 °C for 0.5 h. After washing the oil phase to neutrality and removing the solvent and low molecules under reduced pressure at 180°C / 20 mm Hg, 460 g of vinyl-terminated, methacryloxypropyl-containing organosilicon polymers were obtained Material.

[0027](2) Take 20 g of the vinyl-terminated, methacryloxypropyl-containing organosilicon polymer material obtained in (1), 1000 g of PVC and 0.51 g of azobisisoheptanonitrile, and react at 100°C for 8 h, obtain organosilicon polymer modified PVC.

[0028] (3) 80 g of organi...

Embodiment 3

[0031] (1) Add 1000 g of xylene, 400 g of deionized water and 58.8 g of 0.1 mol / L p-toluenesulfonic acid into a 3 L clean three-necked flask. 39.5g acryloxytrimethylsilane, 10g acryloxydisiloxane, 208g ethyl orthosilicate, 240g dimethyldiethoxysilane, 380g diphenyldimethoxysilane, 248 g of methyltriethoxysilane and 53.8g of dimethylvinylethoxysilane were dropped within 0.5 to 1 h, then reacted at 60 °C for 24 h, stood and separated, and the oil phase was washed until After neutralization, the solvent and low molecules were removed under reduced pressure at 180° C. / 20 mm Hg to obtain 460 g of acryloyloxy group-containing organosilicon polymer material.

[0032] (2) Take 100g of the acryloyloxy group-containing silicone polymer material obtained in (1), 1000g of PVC and 1.1 g of dimethyl azobisisobutyrate, and react at 120°C for 4 hours to obtain the silicone polymer Modified PVC.

[0033] (3) Mix 70 g of organosilicon polymer modified PVC obtained in step (2), 5 g of nano-cal...

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Abstract

The invention relates to the field of organosilicon materials and provides an organosilicon-modified PVC composite material to overcome problems of PVC materials. The organosilicon-modified PVC composite material is prepared by mixing and granulating the following components by weight: 40 to 80 parts of PVC, 0.5 to 10 parts of nanometer calcium carbonate, 0.5 to 50 parts of white carbon black, 0.05 to 5 parts of carbon black, 0.5 to 10 parts of paraffin, 0.1 to 10 parts of lithopone, 0.5 to 10 parts of titanium dioxide, 0.5 to 2 parts of triethyl citrate, 0.1 to 5 parts of pentaerythritol and 0.1 to 5 parts of calcium stearate. The organosilicon-modified PVC composite material has stable performance, excellent low temperature resistance, high tensile strength, good flexibility and long service life.

Description

technical field [0001] The invention relates to the field of organic silicon materials, in particular to an organic silicon modified PVC composite material. Background technique [0002] Polyvinyl chloride (PVC) is a cheap plastic material with the advantages of acid resistance, alkali resistance and corrosion resistance. , bottles, foaming materials, sealing materials, fibers, etc. are widely used. However, PVC has poor thermal stability and starts to decompose hydrogen chloride at 150°C. At the same time, the stability of PVC to light is also poor. When it is above 100°C or exposed to sunlight for a long time, it will decompose to produce hydrogen chloride, and further autocatalyze the decomposition, causing discoloration and rapid decline in physical and mechanical properties. In addition, PVC materials also have disadvantages such as poor surface hardness, tensile strength, impact resistance and wear resistance, becoming brittle at low temperatures, sticky at high temp...

Claims

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Application Information

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IPC IPC(8): C08L27/22C08L91/06C08K13/02C08K3/26C08K3/36C08K3/04C08K5/11C08G77/20C08G77/06
CPCC08G77/06C08G77/20C08K2201/011C08L27/22C08L91/06C08K13/02C08K2003/265C08K3/36C08K3/04C08K5/11
Inventor 杨雄发陈琼申艳平来国桥罗蒙贤李泽
Owner 河北厚丰有机硅制品股份有限公司
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