Gaft polymer, wood-plastic material containing same and its preparing method

Abstract

The present invention provides a graft polymer, a wood-plastic material containing said graft polymer and their preparation method. Its preparation method includes the following steps: firstly, in the presence of organic silane grafting polyolefine to obtain a graft polymer, then using said graft polymer as total or partial base material, and in the presence of catalyst mixing it with wood powderfilling material, then making them undergo the processes of extruding, plasticizing and forming to obtain the invented wood-plastic material with double characteristics of wood and plastics. Said wood-plastic material can be made into package, tray, building material and pipe material, etc. instead of pure wood.

Description

technical field [0001] The invention relates to a graft polymer, wood-plastic material containing the graft polymer and a preparation method thereof, in particular to adding plant fiber powder after graft modification of a thermoplastic resin, and then mixing, mixing, and extruding to form a plastic material. A composite material with dual characteristics of wood and plastic is obtained. Background technique [0002] Wood-plastic material is a new type of environmentally friendly material that has only emerged in the world in recent years. This material mixes thermoplastics or thermosetting plastics with wood fibers in a certain proportion, and then adds corresponding additives to make structural profiles under high temperature and high pressure. Assembled into products such as packaging pallets, packing boxes and building components. The product has the characteristics of wide source of raw materials, low cost, good mechanical properties, good structural and dimensional st...

AI Technical Summary

Problems solved by technology

Although these methods have achieved certain effects, the material performance is poor because the coupling agent and the plastic can only be connected by weak bonds, and this method requires one more production process, and the cost is also relatively large; the other is to increase the cost. The compatibilizer method uses maleic anhydride-grafted polyolefin resin as a compatibilizer to improve compatibility. Since the compatibilizer contains carboxyl groups, it can undergo esterification with the hydroxyl groups in wood flour, thereby reducing the absorption of wood flour. Moisture and polarity to improve compatibility with plastics

However, the compatibilizer of this method needs to select the base material of the compatibilizer according to the base material of the final product, which limits the versatility of the product, and the preparation of the compatibilizer in advance also lengthens the production process

In addition, after the formulation is improved, the requirements for wood powder, especially the water content, are very strict (usually less than 5%), and a large amount of additional drying equipment is required, and the production process can only be intermittent, and continuous production cannot be formed

[0006] JP57192466 discloses a preparation technology, which is to graft unsaturated silane onto polyolefin resin under the action of initiator peroxide, and then blend it with wood flour filler. The coupling agent cannot effectively bond with the wood flour fibers, which will affect the properties of the resulting material