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Preparation and application of zinc hydroxystannate-palygorskite-trithiocyanuric acid compound smoke-suppressed fire retardant

A technology of zinc hydroxystannate and thiocyanate, which is applied in the field of composite flame retardants, can solve the problem of no contribution to the flame retardancy of composite materials, and achieve the effect of good flame retardancy and good flame retardancy

Active Publication Date: 2014-10-29
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among numerous triazine compounds, thiocyanic acid (chemically named as 1,3,5-triazine-2,4,6-(1H. 3H. 5H) trithiol) is non-toxic and easy to disperse It is widely used in polymer modification due to its small dosage and safe process operation, but its single use does not contribute to the flame retardancy of composite materials. Therefore, there is no literature about thiocyanate. Report on the Research of Flame Retardant Properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of zinc hydroxystannate-palygorskite complex: 10 g of ZnCl 2 ·3H 2 O was dissolved in 100 ml of distilled water, 50 g of palygorskite clay (attapulgite) was added, heated to 80 °C, and stirred for 20 min. Use HCl to adjust the system pH = 5.0; add 20 g SnCl 4 ·5H 2 O, stirred vigorously for 10 min, adjusted the final pH=9.0 of the reaction system with NaOH, crystallized at room temperature for 3 h, filtered the precipitate, washed, then put it into an oven for drying, and ground it through a 300m sieve to obtain zinc hydroxystannate- palygorskite complex;

[0021] (2) Preparation of composite flame retardant: compound zinc hydroxystannate-palygorskite composite with thiocyanic acid at a mass ratio of 1:1;

[0022] (3) Preparation of modified polypropylene: Add the above-mentioned hydroxyl composite flame retardant to the polypropylene matrix (the amount added is 20% of the polypropylene mass), and the flame retardant is prepared by the conventional p...

Embodiment 2

[0025] (1) Preparation of zinc hydroxystannate-palygorskite composite: same as Example 1;

[0026] (2) Preparation of composite flame retardant: compound zinc hydroxystannate-palygorskite composite with thiocyanic acid at a mass ratio of 5:1;

[0027] (3) Preparation of modified polypropylene: add the above-mentioned hydroxyl composite flame retardant to the polypropylene matrix (the amount added is 30% of the polypropylene mass), and obtain the flame retardant through the conventional process of melt mixing and additives. Combustible polypropylene material;

[0028] (4) Performance indicators of flame-retardant polypropylene: oxygen index is 37, horizontal combustion reaches HB-a level, vertical combustion reaches UL94V-0 level, smoke density is 105 under flameless conditions, tensile strength is 12.3MPa, fracture The elongation is 141%.

Embodiment 3

[0030] (1) Preparation of zinc hydroxystannate-palygorskite composite: same as Example 1;

[0031] (2) Preparation of composite flame retardant: compound zinc hydroxystannate-palygorskite composite with thiocyanuric acid at a mass ratio of 10:1;

[0032] (3) Preparation of modified polypropylene: add the hydroxyl composite flame retardant prepared above to the polypropylene matrix (the amount added is 40% of the polypropylene mass), and obtain the flame retardant through the conventional process of melt mixing and additives. Combustible polypropylene material;

[0033] (4) Performance indicators of flame-retardant polypropylene: oxygen index is 39, horizontal combustion reaches HB-a level, vertical combustion reaches UL94V-0 level, smoke density is 98 under flameless conditions, tensile strength is 12 MPa, fracture The elongation is 135%.

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Abstract

The invention provides a zinc hydroxystannate-palygorskite-trithiocyanuric acid compound smoke-suppressed fire retardant having good smoke-suppressed fire-retardant performance. The zinc hydroxystannate-palygorskite-trithiocyanuric acid compound smoke-suppressed fire retardant is prepared by compounding a zinc hydroxystannate-palygorskite clay composite (the structure and the performance refer to CN102515185A) with trithiocyanuric acid according to the mass ratio of 20:1 to 1:1. Experiments show that the compound of trithiocyanuric acid and the zinc hydroxystannate-palygorskite clay composite has a good synergetic effect; the fire retardant prepared by taking the compound as the additive has a good carbon forming effect, and therefore, the zinc hydroxystannate-palygorskite-trithiocyanuric acid compound smoke-suppressed fire retardant provided by the invention can be widely used for modifying plastics and various kinds of rubbers.

Description

technical field [0001] The invention relates to a composite flame retardant, in particular to a preparation method of a zinc hydroxystannate-palygorskite-trimeric thiocyanate composite smoke-suppressing flame retardant; the present invention also relates to the composite smoke-suppressing flame retardant The application in the preparation of flame-retardant polymer materials. Background technique [0002] In recent decades, plastics, rubber, synthetic fibers and other polymer materials and their products have been vigorously developed. They are rapidly replacing traditional steel, metal products, cement and natural polymers such as wood and cotton, and are widely used in industries. , agriculture, military and other sectors of the national economy. In 2013, the production of plastic alone reached 299 million tons, and its volume was much larger than the volume of steel produced in the same year, which has become necessary for people's daily life. However, since most polyme...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K13/02C08K3/34C08K5/37
CPCC08K3/24C08K3/346C08K5/37C08L2201/02C08L23/12
Inventor 雷自强罗鑫圣张哲武广瑞赵睿蔡文婧雷蕾周鹏鑫
Owner NORTHWEST NORMAL UNIVERSITY
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