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Process for preparing polyolefine non-halogen fire-retardant master granule

A flame retardant masterbatch, polyolefin technology, applied in the field of chemistry, can solve the problems of poor dispersion and durability of flame retardants, easy foaming and degradation, and flame retardant materials are sensitive to moisture, etc., to overcome poor compatibility, The effect of improving compatibility

Inactive Publication Date: 2004-07-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the compound system has good flame retardant properties, most of the formed salts are low molecular weight, and ammonium polyphosphate has strong hygroscopicity, low thermal stability, poor compatibility with polyolefins and Intrinsic factors such as the high addition of flame retardants (about 30%) lead to flame retardant materials being sensitive to moisture, easy to foam and degrade, poor dispersion and persistence of flame retardants in polyolefin resins, and To a certain extent, damage the processing performance and physical and mechanical properties of the material, etc.
[0009] From the advantages and disadvantages of the above types of flame retardants, it can be seen that their common disadvantages are that the compatibility of flame retardants with polyolefin resins is not good and the addition of flame retardants is large, which will damage the processing properties of materials to a certain extent. and physical and mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Flame retardant masterbatch formula:

[0038] Polypropylene (CF-501): 300 grams

[0039] Initiator (BPO): 1.5 grams

[0040] Methacrylic acid: 30 grams

[0041] γ-Methacryloylpropyltrimethoxysilane (KH-570): 90g

[0042] Melamine: 30 grams

[0043] Magnesium hydroxide: 150 grams

[0044] Aluminum hydroxide: 300 grams

[0045] After mixing the various substances in the above formula evenly with a kneader, kneading in a twin-roller mill for 40 minutes in a molten state at 160-185° C., the polyolefin non-halogen flame-retardant masterbatch is obtained.

[0046] Get this flame-retardant masterbatch 100 grams to add in the polypropylene (CF-501) of 200 grams, the flame-retardant polypropylene oxygen index that makes is 25, and the content of flame-retardant in the flame-retardant material is 17.8% now; Adding 80 parts of the flame retardant masterbatch to 100 parts of polypropylene (CF-501), the oxygen index of the prepared flame retardant polypropylene reaches 27.7, w...

Embodiment 2

[0048] Flame retardant masterbatch formula:

[0049] Polypropylene (CF-501): 300 grams

[0050] Initiator (BPO): 2.4 grams

[0051] Methacrylic acid: 90 grams

[0052]Styrene: 30 grams

[0053] Low-density polyethylene (LDPE): 15 grams

[0054] Ammonium polyphosphate: 255 grams

[0055] Melamine: 60 grams

[0056] Zinc borate: 75 grams

[0057] Pentaerythritol: 30 grams

[0058] Mix the various substances in the above formula evenly with a kneader, and then knead in a twin-roller mill for 20 minutes in a molten state at 160-185° C. to prepare polyolefin non-halogen flame-retardant master batches.

[0059] Get 100 grams of this flame-retardant masterbatch and add it in 200 grams of polypropylene (CF-501), and the oxygen index of the prepared flame-retardant polypropylene is 31, and the content of the flame retardant in the flame-retardant material is now 16.7%. The above-mentioned flame retardant is directly added by the traditional method. When the content of the flame...

Embodiment 3

[0061] Flame retardant masterbatch formula:

[0062] Low-density polyethylene: 300 grams

[0063] Initiator (BPO): 2.4 grams

[0064] Acrylic: 60 grams

[0065] Maleic anhydride: 60 grams

[0066] Ammonium polyphosphate: 240 grams

[0067] Melamine: 75 grams

[0068] Silica: 15 grams

[0069] Magnesium hydroxide: 90 grams

[0070] Mix the various substances in the above formula evenly with a kneader, and then knead them in a twin-roller mill for 50 minutes in a molten state at 160-185° C. to prepare polyolefin non-halogen flame-retardant master batches.

[0071] Get 80 grams of this flame-retardant masterbatch and add in the polypropylene (CF-501) of 200 grams, the flame-retardant polypropylene oxygen index of making is 29.5, and the content of flame-retardant in the flame-retardant material is 13.3% now; 100 grams of the flame retardant masterbatch is added to 200 grams of polypropylene (CF-501), and the oxygen index of the prepared flame retardant polypropylene is as ...

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PUM

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Abstract

The present invention method of polyolefine non-halogen fire-resisting mother granules includes the following steps: uniformly mixing polyolefine, initiating agent, vinyl monomer containing polar group and non-polar group and non-halogen fire-resisting system, melting the above-mentioned mixture at 150-200 deg.C and mixing for 10-188 min. so as to obtain the invented product. It can structurally improved compatibility of the fire-resisting agent and polyolefine resin, and over comes the defect of bad compatibility of existent fire-resisting agent and polyolefine resin.

Description

technical field [0001] The invention relates to a preparation method of a polyolefin non-halogen flame-retardant masterbatch in the field of chemistry. Background technique [0002] Existing flame retardant technologies generally impart flame retardant properties to polyolefins by directly adding flame retardants. At present, the commonly used non-halogen flame retardants mainly include inorganic non-halogen flame retardants and phosphorus-nitrogen intumescent flame retardants, and their respective advantages and disadvantages are as follows: [0003] 1. Inorganic non-halogen flame retardants [0004] Inorganic non-halogenated flame retardants are commonly used aluminum hydroxide, magnesium hydroxide, antimony trioxide, etc., and their outstanding advantages are good thermal stability, non-toxic, non-volatile, long-lasting effect, and good smoke suppression performance , The price is cheap, and it will not produce toxic and corrosive gases when ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/00C08F10/00C08F255/00C08K3/32
Inventor 刘芳贾德民吴小华帅丹蓉
Owner SOUTH CHINA UNIV OF TECH