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

Abstract

The invention provides a wood-plastic material containing a graft polymer and a preparation method thereof. First, a graft polymer is obtained by grafting a polyolefin resin in the presence of an organosilane, and then the graft polymer is used as a All or part of the base material is blended with wood powder filler in the presence of a catalyst, extruded and plasticized to form a wood-plastic material. Using this technology can make the moisture content of the filled wood flour more relaxed, and does not require specific special extrusion molding equipment. The material produced has excellent performance, has dual characteristics of wood and plastic, and can replace pure wood packaging. , cargo pallets, building materials, pipes, etc. At the same time, it has the properties of plastics such as corrosion resistance, non-absorbent, recyclable, etc. The product is completely flame retardant and is a new type of environmentally friendly material.

Description

technical field [0001] The invention relates to a wood-plastic material containing a graft polymer and a preparation method thereof, in particular to a wood-plastic material obtained by grafting and modifying a thermoplastic resin, adding plant fiber powder, proportioning, mixing, and extruding and plasticizing. A composite material with dual properties of wood and plastic. 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 stability, reusa...

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

Images