CN1657568A - A super-tough flame-retardant nylon alloy - Google Patents

Abstract

An ultrahigh-toughness flame-retarded nylon alloy is proportionally prepared from nylon, flame retarder, flame-retarding synergist toughening agent, optical stabilizer and antioxidizing agent through mixing them except nylon, extruding out to obtain particles, mixing with nylon, dual-screw extruding out, cooling, drying and cutting to become particles.

Description

A super-tough flame-retardant nylon alloy

Technical field:

The invention relates to a super-tough flame-retardant nylon alloy and a preparation method thereof.

Background technique:

Nylon is one of the most commonly used engineering plastics. It has strong chemical resistance, tensile strength, abrasion resistance, good fluidity, and excellent processing performance. Therefore, it has been widely used in automobiles, electronic appliances, and industrial machinery since industrialization. , packaging, household appliances and other fields, such as fuel tanks and water tanks for cars and trucks, power connectors, battery boxes, motor casings, relay casings, electric tool casings, etc. However, nylon has defects such as low impact strength and flammability, which limit its further popularization and application, especially in the automotive and electrical industries where it is used in large quantities.

Invention content:

The purpose of the present invention is to overcome the defects of the above-mentioned prior art, and provide a nylon alloy material with excellent toughness and flame retardancy, which can meet the performance requirements of the automobile and electrical industry, and its preparation method.

The purpose of the present invention can be achieved through the following technical solutions: a super-tough flame-retardant nylon alloy, characterized in that it comprises the following components and content (parts by weight):

Nylon 55-80

Flame retardant 5-20

Flame retardant synergist 2-10

Toughener 2-22

Light stabilizer 0.2-5

Antioxidant 0.1-2

The flame retardant is a brominated compound.

The flame retardant synergist is antimony trioxide, antimonate, borate, phosphite or a mixture of these compounds.

The toughening agent is ethylene and higher α-olefin copolymer, styrene-butadiene-styrene block copolymer, hydrogenated styrene-butadiene-styrene block copolymer or a mixture of these compounds.

The light stabilizer is benzophenone, benzotriazoles, hindered amines, titanium dioxide, zinc oxide, carbon black or a mixture of these compounds.

The antioxidants are phenols, phosphites, sulfuric acid esters, metal deactivators or mixtures of these compounds.

A preparation method of a super-tough flame-retardant nylon alloy, characterized in that, firstly, a flame retardant, a flame-retardant synergist, a toughening agent, a light stabilizer, and an antioxidant are blended and extruded to obtain toughened and flame-resistant nylon alloys. Combustion masterbatch, and then disperse and blend the filled toughened flame-retardant masterbatch and nylon resin, extrude through twin-screw extruder, cool, dry, and pelletize to obtain the product.

Compared with the existing traditional technology, the invention can obtain the nylon alloy material with excellent toughness and flame retardancy by selecting an efficient toughening and flame retardancy system, which can meet the use requirements of the automobile and electric appliance industries.

Detailed ways:

The present invention will be further described below by specific examples.

Embodiment 1-3:

Using nylon as the base material, the component contents (parts by weight) of the compositions are listed in Table 1.

(1) Put the flame retardant, flame retardant synergist, toughener, light stabilizer, and antioxidant in a high-speed mixer, mix for 10-15 minutes, and rotate at 600 rpm. Put the mixed material into the hopper of the single-screw extruder, the temperature of each section of the screw is 170-180, the screw speed is 300rpm, the material is pelletized, air-dried, and cooled to make toughened flame-retardant masterbatch.

(2) Disperse and blend the toughened flame-retardant masterbatch and nylon, melt, knead, extrude, cool, dry, pelletize and pack through a twin-screw extruder to obtain the product. The temperature of each section of the screw is 240-280°C, the screw speed is 300rpm, and then a standard sample is made for performance testing. The test results are listed in Table 2.

Table 1 Component content of a super-tough flame-retardant nylon alloy serial number material name Example 1 Example 2 1 nylon 60 80 2 flame retardant 10 13 3 Flame Retardant Synergist 3 4 4 Toughener 8 12 5 light stabilizer 1.2 1.5 6 antioxidant 0.15 0.2

The above-mentioned flame retardant is decabromodiphenylethane.

The above-mentioned flame retardant synergist is antimony trioxide.

The above-mentioned toughening agent is ethylene-octene copolymer.

The light stabilizer mentioned above is 2-hydroxy-4-octyloxybenzophenone.

The above-mentioned antioxidant is 2,6-di-tert-butyl-4-methylphenol.

Table 2 Physical and mechanical properties of a super-tough flame-retardant nylon alloy serial number Performance unit Example 1 Example 2 1 Tensile Strength MPa 65 69 2 Bending strength MPa 84 87 3 Notched impact strength KJ/ ^m2 16 14 4 Flammability rating / V-0 V-0

Claims (7)

1. a super tough fire-retardant nylon alloy is characterized in that, comprises following component and content (weight part):

Nylon 55-80

Fire retardant 5-20

Retardant synergist 2-10

Toughner 2-22

Photostabilizer 0.2-5

Oxidation inhibitor 0.1-2

2. a kind of super tough fire-retardant nylon alloy according to claim 1 is characterized in that described fire retardant is the bromine compounds.

3. a kind of super tough fire-retardant nylon alloy according to claim 1 is characterized in that described retardant synergist is the mixture of antimonous oxide, stibnate, borate, phosphorous acid esters or these compounds.

4. a kind of super tough fire-retardant nylon alloy according to claim 1, it is characterized in that, described toughner is ethene and senior a-olefin copolymer, styrene-butadiene-styrene block copolymer, the mixture of hydrogenated styrene-butadiene-styrene block copolymers or these compounds.

5. a kind of super tough fire-retardant nylon alloy according to claim 1 is characterized in that described photostabilizer is the mixture of benzophenone, benzotriazole category, hindered amines, titanium dioxide, zinc oxide, carbon black or these compounds.

6. a kind of super tough fire-retardant nylon alloy according to claim 1 is characterized in that described oxidation inhibitor is the mixture of phenols, phosphorous acid esters, sulfur-bearing esters of gallic acid, metal passivator or these compounds.

7. the preparation method of a super tough fire-retardant nylon alloy, it is characterized in that, at first with fire retardant, retardant synergist, toughner, photostabilizer, oxidation inhibitor blend extruding pelletization, obtain the toughening flame-proof master batch, and then with filled toughening fire-retardant master granule and nylon resin after disperseing blend, by twin screw extruder extrude, cool off, dry, pelletizing, obtain product.