High-retardant polyamide

A polyamide, high flame retardant technology, applied in the field of flame retardant polyamide, can solve the problems of no test data of flame retardant effect, complicated preparation process of flame retardant, and unfavorable expansion of production, etc., so as to solve the problem of wick effect, Excellent flame retardant effect, excellent flame retardancy and mechanical properties
CN102321362AActive Publication Date: 2012-01-18SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2012-01-18

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Abstract

The invention discloses high-retardant polyamide which is prepared from the following components in percentage by weight through cross blending fusion: 42-85% of polyamide, 10-25% of branched chain alkyl phosphinic acid and melamine derivatives, 0.5-3% of fire-retardant synergist, and 0-30% of alkali-free glass fiber, wherein the mass ratio in percentage of branched chain alkyl phosphinic acid tothe melamine derivatives is (2:1)-(4:1), or the mass percentage of the melamine derivatives is 0, the oxygen index of the high-retardant polyamide is 27.3-32.2%, and the vertical flame UL-94 of a test sample with the thickness of 1.6mm is V-1, and the vertical flame UL-94 of a test sample with the thickness of 0.8mm is NR-(V-0). The high-retardant polyamide provided by the invention is obtained through adding a retardant system of a novel branched chain alkyl phosphinic acid fire retardant, a nitrogen or phosphorous compound and the formulation of the synergist, not only has an excellent fireretardant effect, but also can be used for lowering the cost through reducing the additive amount of the fire retardant.
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Description

technical field

[0001] The invention belongs to the technical field of flame-retardant polyamides, in particular to a highly flame-retardant polyamide mainly based on a branched chain alkyl phosphinate compounded with a nitrogen-containing flame retardant or a glass fiber-reinforced high flame-retardant polyamide. amides. Background technique

[0002] Polyamide is commonly known as nylon (Nylon), the English name is Polyamide (PA), and polyamide 6 and polyamide 66 are two of the most important varieties. Although polyamide has become the material of choice for the electrical and electronic industry and the automotive industry due to its good mechanical properties, chemical resistance, oil resistance and good electrical insulation, but because these fields now require high flame retardancy properties of materials, The flame retardancy of polyamide and its glass fiber-reinforced polyamide products is very poor, and its oxygen index is only 22%. Even if the thickness of polyam...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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