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Stearic acid modified PVC wood plastic and preparation method thereof

A stearic acid and modification technology, which is applied in the field of stearic acid modified PVC wood plastic and its preparation, can solve the problems of mismatching processing temperature and low performance of wood plastic products, and achieve high bending strength, good economic benefits and high efficiency. Social effect, good practical effect

Inactive Publication Date: 2016-08-17
NANJING XUHUA SUNDI NEW BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of general-purpose plastics such as PE, PVC, and PP as base materials, the performance of the obtained wood-plastic products is not high, and can only be used in low-end places.
[0003] The flexural strength and flexural elastic modulus of engineering plastic PVC composite stabilizers are much higher than general plastics, and have broad application prospects in wood-plastic products, but because the melting point of PVC composite stabilizers generally exceeds 220 ° C, and wood fibers except Contains high-temperature-resistant cellulose (the thermal degradation initiation temperature exceeds 250°C), and also contains hemicellulose and lignin whose thermal degradation initiation temperature is lower than 200°C, and the processing temperature mismatch is difficult to solve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Modified PVC composite stabilizer: Dry the PVC composite stabilizer and lithium chloride in an oven until the water content is below 0.1%, mill the lithium chloride in a ball mill, pass through a 80-mesh screen, and separate the components by Weigh the following parts by weight: 50 parts of PVC composite stabilizer, 10 parts of lithium chloride, 35 parts of PE, 5 parts of maleic anhydride grafted PE, mix in an internal mixer for 5 minutes, set the temperature at 240°C, and knead The final stearic acid modified PVC alloy is crushed in the crusher.

[0021] Wood-plastic preparation: the weight fractions of the following components are respectively: 50 parts of stearic acid-modified PVC alloy, 40 parts of wood fiber, 5 parts of zinc stearate, and 5 parts of iron oxide red. The above materials are mixed in a mixer and granulated by a granulator, and the granulated material is extruded into shape.

Embodiment 2

[0023] Modified PVC composite stabilizer: Dry the PVC composite stabilizer and lithium chloride in an oven until the moisture content is below 0.1%, mill the lithium chloride in a ball mill, pass through a 100-mesh screen, and separate the components by Weigh the following parts by weight: 70 parts of PVC composite stabilizer, 15 parts of lithium chloride, 10 parts of PP, 5 parts of maleic anhydride grafted PP, mix in a mixer for 8 minutes, and then granulate. The temperature of each zone of the granulator is set at 180-280°C.

[0024] Wood-plastic preparation: the weight fractions of the following components are respectively: 80 parts of stearic acid modified PVC alloy, 10 parts of wood fiber, 5 parts of calcium stearate, and 5 parts of iron oxide yellow. The above materials are mixed in a mixer and granulated by a granulator, and the granulated material is injection molded.

Embodiment 3

[0026] Modified PVC composite stabilizer: Dry the PVC composite stabilizer and calcium chloride in an oven until the moisture content is below 0.1%. After the calcium chloride is ball-milled in a ball mill, pass through a 100-mesh sieve and separate the components into The following parts by weight are weighed: 60 parts of PVC composite stabilizer, 10 parts of calcium chloride, 10 parts of PE, 10 parts of PP, 5 parts of GMA grafted PE, 5 parts of maleic anhydride grafted PP, mixed in the internal mixer For 5 minutes, the temperature was set at 240° C., and the kneaded stearic acid-modified PVC alloy was crushed in a crusher.

[0027] Wood-plastic preparation: the weight fractions of the following components are respectively: 25 parts of stearic acid-modified PVC alloy, 70 parts of wood fiber, 3 parts of stearic acid, and 2 parts of titanium dioxide. The above materials are mixed in a mixer and granulated by a granulator, and the granulated material is extruded into shape.

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Abstract

The invention discloses a stearic acid modified PVC wood-plastic, which belongs to the technical field of wood-plastic materials, and comprises the following components in parts by weight: 25-50 parts of stearic acid-modified PVC, 5-80 parts of wood fiber, PE 1-8 parts of wax and 1-6 parts of pigment. The invention also discloses a preparation method of the wood plastic. A stearic acid-modified PVC wood plastic of the present invention, by adding a stearic acid-modified PVC composite stabilizer, reduces fire and moisture resistance to below 200°C, and at the same time adds PE and PP to improve the impact resistance of the PVC composite stabilizer, so that Wood-plastic products have higher flexural strength, flexural modulus and unnotched impact strength, and can partially replace structural materials; the preparation method of stearic acid-modified PVC wood-plastic of the present invention has good practicability and can Produce better economic and social effects.

Description

technical field [0001] The invention belongs to the technical field of wood-plastic materials, and in particular relates to a stearic acid-modified PVC wood-plastic and a preparation method thereof. Background technique [0002] In recent years, due to the advantages of environmental protection, recyclability, and non-toxicity, wood-plastic has been gradually applied to outdoor landscape garden materials. However, due to the use of general-purpose plastics such as PE, PVC, and PP as base materials, the performance of the obtained wood-plastic products is not high, and can only be used in low-end places. [0003] The flexural strength and flexural elastic modulus of engineering plastic PVC composite stabilizers are much higher than general plastics, and have broad application prospects in wood-plastic products, but because the melting point of PVC composite stabilizers generally exceeds 220 ° C, and wood fibers except Contains high-temperature-resistant cellulose (the therma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L23/06C08L23/12C08L51/06C08K3/16C08K5/09C08K3/22C08K5/098
CPCC08L97/02C08K2201/014C08L2201/02C08L2205/03C08L2205/035C08L2205/08
Inventor 马长城许世华何军李靖
Owner NANJING XUHUA SUNDI NEW BUILDING MATERIALS
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