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Halogen-free flame-retardant wood-plastic composite material and preparation thereof

A technology of wood-plastic composite materials and flame retardants, applied in the field of wood-plastic composite materials, can solve the problems of lack of halogen-free flame-retardant additives, mechanical properties of wood-plastic composite materials, unsatisfactory flame-retardant performance, and wood powder modification process Complicated issues

Inactive Publication Date: 2012-12-05
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that in order to achieve a better flame retardant effect, it is necessary to use a halogen-containing flame retardant; and the modification process of wood powder is more complicated
The disadvantage of existing halogen-free intumescent flame retardants is that the mechanical properties and flame retardancy of wood-plastic composites added with existing intumescent flame retardants are not satisfactory
[0006] In summary, there is a lack of a halogen-free flame retardant additive for wood-plastic composites in this field, which can obtain better mechanical properties and flame-retardant properties after being added to wood-plastic composites.

Method used

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  • Halogen-free flame-retardant wood-plastic composite material and preparation thereof
  • Halogen-free flame-retardant wood-plastic composite material and preparation thereof
  • Halogen-free flame-retardant wood-plastic composite material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] With 15 parts by weight of ammonium polyphosphate (polymerization degree is 1000) and 5 parts by weight of ammonium melamine to process 100 parts of pine wood flour (average length-to-diameter ratio is 6) with average particle diameter of 40 objects, the consumption of wetting agent water is 20 parts , mixed in a high-speed mixer for 15 minutes, then allowed to stand for 24 hours, and then dried in an oven at 100° C. for 2 hours to prepare flame-retardant wood powder. The flame retardant wood powder has self-extinguishing properties, and the char formation rate (that is, the combustion residue rate) is 51% according to the test of ASTM D2584.

[0089] 100 parts of flame retardant wood powder, 4 parts of polyethylene grafted with maleic anhydride (grafting rate 0.9mol%, melt index 6.5g / 10min) as interface compatibilizer, 100 parts of high density polyethylene (brand name is HDPE 5070, purchased from Panjin Petrochemical), 5 parts of oxidized polyethylene wax and 0.3 part...

Embodiment 2

[0099] Process 100 parts of 20-mesh pine wood flour (average aspect ratio is 8) with 30 parts of ammonium polyphosphate (polymerization degree is 1200) and 15 parts of melamine, the consumption of wetting agent water is 40 parts, mix in high-speed mixer After 15 minutes, it was left to stand for 24 hours, and then dried in an oven at 100° C. for 2 hours to obtain flame-retardant wood powder. The flame retardant wood powder has self-extinguishing property, and the char formation rate is 62%.

[0100] Mix 145 parts of flame-retardant wood powder, 8 parts of maleic anhydride grafted high-density polyethylene, 100 parts of high-density polyethylene (HDPE 5070), 15 parts of oxidized polyethylene wax and 0.3 parts of antioxidant 1010, and pass wood plastic The flame retardancy and mechanical properties of the obtained wood-plastic composite materials are shown in Table 2.

[0101] Table 2 Flame retardant properties and mechanical properties of wood-plastic composites in Example 2 ...

Embodiment example 3

[0104] Prescription is identical with implementation case 2, and difference is that method of the present invention is not adopted to carry out fire-retardant treatment to wood flour, but directly with 30 parts of ammonium polyphosphate, 15 parts of melamine process, 100 parts of 20 purpose pine wood powders ( The average aspect ratio is 8), 8 parts of maleic anhydride grafted high-density polyethylene, 100 parts of high-density polyethylene (HDPE5070), 15 parts of oxidized polyethylene wax and 0.3 part of antioxidant 1010 are mixed and directly extruded. The flame retardancy and mechanical properties of the obtained wood-plastic composites are as follows.

[0105] Table 3 Flame retardant and mechanical properties of wood-plastic composites in Example 3

[0106]

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Abstract

The invention provides a halogen free fire retardation cellulose substance composition which is used as a halogen free expansion fire retardant agent, a bulking agent and / or a reinforcing agent. The halogen free fire-retardant cellulose substance composition comprises the following components: (A) 100 weight portions of cellulose substance with the powder diameter of between 20 and 300 meshes; (B) 10 to 40 weight portions of water soluble phosphatic fire retardant capable of facilitating the dehydration of the cellulose substance and carbon formation; and (C) 0 to 20 weight portions of water soluble nitrogen-contained fire retardant. The composition can be used to prepare wood-plastic composite material with better mechanical properties and fire retardation performance.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant composite material, in particular to a halogen-free flame-retardant wood-plastic composite material. Background technique [0002] Wood-plastic composites made of wood powder-filled polymers have developed rapidly in recent years because of their good mechanical properties and low cost. However, plastics such as polyethylene and polypropylene and wood powder are hydrocarbons, which are easy to burn when exposed to open flames or heated. Therefore, wood-plastic composite materials are also easy to burn, and their flammability greatly limits their applications. For example, floors and ceilings used for interior decoration require materials to have certain flame retardancy to reduce the risk of fire. [0003] In order to overcome the above problems, the prior art is to add flame retardants to wood-plastic composite materials. At present, the most commonly used flame retardant system added to wood-p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08K5/521B29C47/40C08L101/00
Inventor 李兰杰解廷秀杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD