Preparation methods of anti-aging wood-plastic composite and light stabilizer

Abstract

The invention discloses preparation methods of an anti-aging wood-plastic composite and a light stabilizer. The wood-plastic composite is prepared from the following raw material components in parts by weight: 100 parts of polyvinyl chloride, 20-40 parts of sisal fibers, 1-5 parts of a heat stabilizer, 1-8 parts of a lubricating agent, 0.5-2 parts of an antioxidant, 6-10 parts of a plasticizer and 0.5-5 parts of a light stabilizer shown as the short chemical formula: P(HAPBT-co-MTMP-co-AEG-cp-OA). Due to the addition of the specific light stabilizer, the ageing-resistant effect of the wood-plastic composite is favorably improved; in addition, the composite has relatively good physical and mechanical properties and processability, so that the application field of the wood-plastic composite is further widened, and the wood-plastic composite not only can be applied to some indoor wood materials, but also can be applied to outdoor materials such as architectural decoration, transportation, municipal administration and gardens.

Description

technical field [0001] The invention relates to a composite material, more specifically, the invention relates to an anti-aging wood-plastic composite material and a preparation method of a light stabilizer. Background technique [0002] Wood-plastic composite materials have been widely used because of their durability, long life, appearance similar to wood materials, low density, better dimensional stability than wood, no cracks, warping, no wood knots, twill, and easy molding. It is applied to various aspects such as construction, various indoor and outdoor planks, various pallets in logistics, some tables and chairs in the garden, and decorative products. In recent years, with the aggravation of air pollution and the increasing scarcity of petroleum resources, the use of natural plant fibers, plastic substrates and waste plastics to make wood-plastic composite materials with excellent performance has become a common concern in the industry and science circles, which has f...

AI Technical Summary

Problems solved by technology

The solution is to coat a layer of protective film on the surface of the wood-plastic composite material, but for the unavoidable problems such as peeling of the coating on the surface coating, it is necessary to choose a suitable stabilizer, modifier, UV absorber, etc. Can better inhibit the aging of wood-plastic composite materials

[0004] Because wood-plastic composite materials contain plant fibers and plastic matrix at the same time, the aging mechanism of wood-plastic composite materials is very complicated. At present, there are patents on the aging performance of wood-plastic composite materials, such as Chinese patent CN101708617A, which uses wood powder, plastic particles, maleic anhydride, hard Aging-resistant wood-plastic composite boards are prepared by combining fatty acid salts, antioxidants, and ultraviolet absorbers. The ultraviolet absorber used in the patent is 2-hydroxy-4-n-octyloxybenzophenone, which is a traditionally commonly used one. Benzophenone-like UV absorber, the excellent anti-aging performance of general materials comes from the effects of added additives, light stabilizers and antioxidants, etc. This patent does not highlight the anti-aging effect

Chinese patent CN103483846A discloses a kind of anti-aging anti-brittle cold polypropylene-based wood-plastic composite material composed of wood powder, polypropylene, maleic anhydride grafted polypropylene, anti-aging agent, toughening agent, filler, lubricant, but The anti-aging agent used is composed of antioxidant and UV-531, so the light stabilizer has the disadvantages of low molecular weight and easy decomposition during processing.

Chinese patent CN104031399 discloses a composition of wheat straw, polypropylene, mold release agent and anti-aging agent. The anti-aging agent used is UV327, which is also a commonly used light stabilizer in materials. It also has the disadvantages of low molecular weight and easy decomposition; Chinese patent CN104231430A discloses a preparation method and products of anti-fouling and aging-resistant wood-plastic materials, which are composed of PP, wood powder matrix raw materials, nano-carbon black light stabilizers and other auxiliary agents, and the nano-carbon black used has the disadvantages of being difficult to disperse.

Chinese patent CN104356545A discloses a high weather resistance PVC wood-plastic composite material and its preparation method. It uses PVC and sawdust powder as the main raw materials, and then composes with compounding additives and benzotriazole light stabilizer, which has long-term light stability. Insufficient effect is not good

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