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Non-bittern expanding flame-proof material and method for making same

An intumescent flame retardant and flame retardant material technology, applied in the field of flame retardant materials, can solve environmental pollution, damage and other problems, achieve good mechanical properties, small amount of flame retardant addition, and reduce the effect of heating temperature

Inactive Publication Date: 2008-03-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of ternary IFR lowers the initial decomposition temperature of PP and increases the char formation rate. However, in addition to small molecular compounds such as ammonia and water, the volatile products of thermal degradation of flame-retardant PP also release melamine, which is likely to cause damage to the human body. harm, pollute the environment

Method used

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  • Non-bittern expanding flame-proof material and method for making same
  • Non-bittern expanding flame-proof material and method for making same
  • Non-bittern expanding flame-proof material and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First add 100gPP to the double-roller heating machine with a roll temperature of 160-170°C. After melting the rolls, add 20gAPP, 10gPER and 10gMEL, and mix for 8 minutes to fully disperse the flame retardant in PP. Vulcanize on a 15MPa180°C plate Machine hot pressing for 3 minutes, and then cooling and shaping in a 15MPa cold plate vulcanizing machine for 5 minutes. The oxygen index of the halogen-free intumescent flame-retardant polypropylene prepared in this example is 33, and the tensile strength, flexural strength, and impact strength are 20.87MPa, 50.64MPa, and 4.42KJ / m respectively. 2 .

Embodiment 2～9

[0026] Each raw material and proportioning are shown in Table 1, the mixing time from embodiment 2 to 9 is respectively 8, 10, 9, 9, 15, 11, 13, 9min, and hot pressing time is respectively 2, 3, 3, 3, 5, 4, 3, 5 min, other steps and conditions are the same as in Example 1.

[0027] Table 1 Examples 2-9

[0028]

[0029] The flame retardancy and mechanical properties of the halogen-free intumescent flame retardant materials prepared in Examples 2 to 9 are as follows

[0030] Table 2:

[0031] Table 2 The flame retardancy and mechanical properties of the materials of Examples 2 to 9

[0032]

Embodiment 10

[0034] First add 100gPP to a double-roller heat-refining machine with a roll temperature of 160-170°C. After melting the rolls, add 20gAPP, 9gPER, 1g starch and 10gMEL, and knead for 9 minutes to fully disperse the flame retardant in PP. Hot press at 180°C for 3 minutes in a flat vulcanizing machine, then cool and set in a cold flat vulcanizing machine at 15MPa for 5 minutes. The oxygen index of the halogen-free intumescent flame-retardant polypropylene prepared in this example is 33, and its tensile strength, bending strength and impact strength are the same as those in Example 1.

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Abstract

The present invention relates to one kind of no-halogen expanding fire retardant material and its preparation process. The no-halogen expanding fire retardant material consists of polypropylene and expanding fire retardant in 30-50 wt% of polypropylene. It is prepared through melting and rolling polypropylene at 160-170 deg.c, adding expanding fire retardant and additive and mixing for 8-15 min, hot pressing at 15 MPa and 180 deg.c for 2-5 min and cooling to set. The no-halogen expanding fire retardant material of the present invention has excellent fire retardant effect and high mechanical performance.

Description

technical field [0001] The invention relates to a flame retardant material, in particular to a halogen-free intumescent flame retardant material and a preparation method thereof. Background technique [0002] At present, the flame retardant materials used in China are mainly brominated flame retardant materials. However, such bromine-based flame-retardant materials are prone to pollution and are difficult to meet environmental protection requirements. Therefore, it is very necessary to research and develop new halogen-free and highly efficient flame retardant materials. At present, a series of polypropylene halogen-free flame retardant materials have been developed abroad. These flame retardants are based on ammonium phosphate, added with nitrogen-containing synergists, and made by special technology. These flame retardants are too expensive to be produced. Widely used in our country. [0003] The European Patent Office EP0735119A1 publication discloses a phosphorus-nitro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/3492C09K21/14C08K3/32C08K5/053C08K3/22C08K3/34
Inventor 黄承亚赵玉平赵彦芝
Owner SOUTH CHINA UNIV OF TECH
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