Toughened POM and production process thereof

Abstract

The invention relates to an organic macromolecular composite material, in particular to a polyformaldehyde with improved toughness and a preparation method thereof. The polyformaldehyde is formed by the following components in percentage by weight: 60-80 percent of polyformaldehyde, 10-15 percent of glass fiber, 5-15 percent of impact modifier, 0.3-1.0 percent of antioxidant 1010, 0.3-1.0 percent of antioxidant 168, 0.4-1.0 percent of formaldehyde absorbent, 0.1-0.5 percent of coupling agent and 0.1-0.5 percent of other additives. In the toughened POM and the production process thereof of the invention, the raw materials for production are convenient to purchase; the production and the usage are convenient; the cost performance of the products is high; therefore, the condition that the toughened polyformaldehyde is limited to use for a variety of reasons is changed and the competitiveness of the toughened POM is fully enhanced.

Description

technical field [0001] The invention relates to an organic polymer composite material, in particular to a toughened polyoxymethylene and a preparation method thereof. Background technique [0002] Research on the toughening of polyoxymethylene (POM) is a difficult point in the research of POM modification. At present, many institutions and enterprises have conducted research on the toughening of polyoxymethylene (POM), but there are always obvious defects in certain aspects of performance or low cost performance. high and cannot be mass-produced. At present, more research directions on the market are: some blending systems of melt alloyed toughened polyoxymethylene (POM), such as POM / PUR-T, POM / PP, POM / NBR, POM / PA and inorganic particle toughened POM system; [0003] The toughening of POM is most effective and easy to toughen with elastomer. In recent years, research on elastomer toughening POM has four kinds of elastomers, thermoplastic polyurethane elastomer (TPU), nitr...

AI Technical Summary

Problems solved by technology

[0004] 1. Although the impact strength of polyoxymethylene can be greatly improved by combining with elastomers, the tensile strength and rigidity of polyoxymethylene decrease greatly, and it is difficult to obtain polyoxymethylene with a balance of rigidity and toughness; although polymers such as nano-rubber can improve polyoxymethylene The toughness of formaldehyde, but the increase is not large, and it is difficult to make high-toughness polyoxymethylene blends; elastomers and nano-rubbers are expensive, and the cost of high-toughness polyoxymethylene produced is relatively high;

[0005] 2. The ultrafine composite powder of elastomer and inorganic ultrafine powder with coating, peeling, intercalation and other structures is blended with polyoxymethylene to realize the complementary performance advantages of elastomer and ultrafine inorganic powder. Reducing the amount of expensive elastomers can prepare high-toughness polyoxymethylene blends with excellent rigidity and toughness and low raw material cost. However, although the raw material cost is low, it is inconvenient to mass-produce on a large scale, and the product quality is difficult to control and stabilize. Shortcomings