Flame-retardant polyolefin composition and preparation method thereof

Abstract

The invention discloses a flame-retardant polyolefin composition which comprises the following components in parts by weight: 100 parts of polyolefin resins, 0.5-10 parts of tris(tribromoneopenthyl) phosphate, 0.5-10 parts of a phosphorus based flame retardant and 0.1-2 parts of a flame retardant synergist. The phosphorus based flame retardant is selected from at least one of hypophosphite, phosphate and polyphosphates. The flame-retardant polyolefin composition disclosed by the invention has the advantages of excellent flame-retardant property, surface gloss, transparency and the like, and particularly under the condition that the tris(tribromoneopenthyl) phosphate is compounded with the phosphate and the flame retardant synergist, the surface gloss and the transparency are excellent.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a flame-retardant polyolefin composition and a preparation method thereof. Background technique [0002] Polyolefin resins include polyethylene, polypropylene, polyvinyl acetate and various olefin copolymers, among which polypropylene has become one of the most widely used general-purpose plastics due to its excellent comprehensive performance, good cost performance, and wide processing and molding conditions. one. Most polyolefin resins are flammable materials. For example, the limiting oxygen index of polypropylene is 17-18%. Flame retardant modification must be carried out. [0003] The flame retardants used for polyolefins are mainly divided into brominated flame retardants and halogen-free flame retardants. In the existing flame-retardant modified polyolefins, in order to meet the requirements of halogen-free, it is necessary to choose to add phosphorus, nitrogen or other...

AI Technical Summary

Problems solved by technology

However, compared with the traditional bromine-antimony compound flame retardant system, these flame retardant systems have disadvantages such as large amount of addition and poor physical properties, and there are still great limitations in wide application.

[0004] Chinese patent 201010154587.3 discloses a flame retardant composition with phosphinate and melamine hydrobromide as the main components, which can make polypropylene reach the UL94 V-2 flame retardant level, but the flame retardant in its components The synergist contains antimony, bismuth and other elements, which will reduce the transparency of the material

At the same time, antimony and its compounds, as typical heavy metal non-renewable mineral resources, are expensive, and are likely to cause environmental pollution and health damage during processing. The antimony-free flame retardant formula system effectively solves these problems

Chinese patent 200980131213.5 discloses a polypropylene composition using a mixture of tris(tribromoneopentyl) phosphate and a carbon-carbon initiator as a flame retardant component, does not contain antimony trioxide, and can meet UL94V-1 Or V-0 flame retardant level, but the amount of flame retardant added is higher

[0005] With the continuous improvement of application requirements in downstream industries, in addition to the requirements for conventional properties such as flame retardancy and physical properties, more and more products expect materials to have good surface gloss and transparency at the same time. The commonly used bromine - The performance of flame retardant systems such as antimony and halogen-free expansion in these aspects is unsatisfactory

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