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Polyamide/phosphate glass flame-retardant material and preparation method thereof

A technology of phosphate glass and flame retardant material, which is applied in the field of polyamide/phosphate glass flame retardant material and its preparation, can solve the problems of material molding and processing, the influence of physical and mechanical properties, the large amount of inorganic flame retardant added, and the like. Good application prospect, low cost, simple implementation effect

Active Publication Date: 2013-05-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of inorganic flame retardants is large, such as the addition of magnesium hydroxide or aluminum hydroxide is usually about 40wt%, and the inorganic flame retardant powder will not melt during the polymer molding process, but exists in the form of particle aggregates , has a serious impact on the forming process and physical and mechanical properties of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 100 g SnF 2 , 40g SnO and 60g P 2 o 5 After pre-mixing for 30 minutes, melt at 450°C for 70 minutes, then pour it on a stainless steel plate to cool, then heat-treat at 90°C for 90 minutes to obtain phosphate glass, and finally obtain phosphate glass powder by ball milling.

[0024] 70% PA6 and 30% phosphate glass (percentage by weight) are melt-blended in a twin-screw to prepare a flame-retardant PA6 / phosphate glass hybrid material, and the blending temperature is 220-260°C. The limiting oxygen index of this material is 29.3%.

Embodiment 2

[0026] 90 g SnF 2 , 50 g SnO and 60 g P 2 o 5 After pre-mixing for 40 minutes, melt at 450°C for 70 minutes, then pour it on a stainless steel plate to cool, then heat-treat at 90°C for 120 minutes to obtain phosphate glass, and finally obtain phosphate glass powder by ball milling.

[0027] 77% PA6, 20% phosphate glass and 3% melamine urate (percentage by weight) are melt-blended in a twin-screw to prepare a flame-retardant PA6 / phosphate glass hybrid material, and the blending temperature is 220-260°C. The limiting oxygen index of this material is 32.1%.

Embodiment 3

[0029] 100 g SnF 2 , 40 g SnO and 95 g NH 4 h 2 PO 4 After pre-mixing for 35 minutes, melt at 450°C for 70 minutes, then pour it on a stainless steel plate to cool, then heat-treat at 90°C for 100 minutes to obtain phosphate glass, and finally obtain phosphate glass powder by ball milling.

[0030] 65% PA6, 32% phosphate glass and 3% melamine borate (percentage by weight) are melt-blended in a twin-screw to prepare a flame-retardant PA6 / phosphate glass hybrid material, and the blending temperature is 220-260°C. The limiting oxygen index of this material is 36.8%.

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Abstract

The invention relates to a polyamide / phosphate glass flame-retardant material and a preparation method thereof. The polyamide / phosphate glass flame-retardant material comprises the following components in percentage by weight: 50 to 90 percent of polyamide, 10 to 50 percent of phosphate glass and 0 to 6 percent of flame co-retardant. The preparation method comprises the following steps of: (1) premixing SnF2, SnO and NH4H2PO4 or P2O5 for 30 to 40 minutes, melting at the temperature of between 400 and 500 DEG C for 60 to 90 minutes, cooling, performing thermal treatment at the temperature of between 70 and 100 DEG C for 90 to 120 minutes, and performing ball milling to obtain phosphate glass powder; and (2) drying the polyamide, the phosphate glass and the flame co-retardant, mixing, melting at the temperature of between 220 and 270 DEG C and blending to obtain the polyamide / phosphate glass flame-retardant material. The preparation method is easy and convenient to implement and low in cost; and the prepared flame-retardant polyamide / phosphate glass organic-inorganic hybrid material can be applied in the fields of fiber, plastic and the like and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of flame-retardant polyamide and its preparation, in particular to a polyamide / phosphate glass flame-retardant material and its preparation method. Background technique [0002] Polyamide (PA) is a thermoplastic polymer with a wide range of uses. It has the advantages of high strength, wear resistance, solvent resistance, and good self-lubrication. Engineering plastics, fibers and films made of polyamide have been widely used in automobiles, electronic appliances, machinery and chemical equipment, construction and other fields. Due to the great danger of fire caused by leakage, short circuit, arc, electric spark, etc. in the live working environment of automobile electrical appliances and electric tools, the research and development of flame-retardant polyamide has attracted widespread attention. [0003] The flame retardancy of polyamide is mainly achieved in two ways: (1) using a reactive flame retardant, that is, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/00C08L77/02C08L77/06C08K13/02C08K3/40C08K5/3492C08K3/22
Inventor 马敬红徐坚
Owner DONGHUA UNIV