Preparation method of flame-resistant polypropylene board

A polypropylene board and raw material technology, applied in the field of polypropylene board, can solve the problems of poor flame retardancy, toughness, poor low temperature and aging resistance, large molding shrinkage, etc., to achieve improved flame retardancy and heat resistance, good Heat resistance and flame retardant performance, the effect of improving the overall stability

Inactive Publication Date: 2019-06-14
江苏宏佳华新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems in the prior art, the present invention provides a method for preparing a flame-retardant polypropylene board, which solves the problems of poor toughness, low-temperature resistance, and aging resistance of the existing polypropylene board, as well as large molding shrinkage and poor flame retardancy. Problem, through the combined modification of silicone resin and aluminum silicate, the overall flame retardancy and heat resistance are improved

Method used

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  • Preparation method of flame-resistant polypropylene board
  • Preparation method of flame-resistant polypropylene board
  • Preparation method of flame-resistant polypropylene board

Examples

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Effect test

Embodiment 1

[0032] A preparation method of a flame-retardant polypropylene plate, comprising the steps of:

[0033] Step 1, adding the organosilicon raw material into toluene, stirring at room temperature until completely dissolved, to obtain a toluene solution; the organosilicon raw material is methyltrichlorosilane;

[0034] Step 2, adding distilled water into a constant pressure dropping funnel, slowly adding it dropwise into the toluene solution at a constant temperature, stirring evenly, and standing for 2 hours to obtain an acidic hydrolyzate;

[0035] Step 3, passing ammonia gas into the acidic hydrolyzate until the hydrolyzate is neutral, adding an aluminum silicate catalyst, copolymerized polypropylene powder and homopolypropylene powder and stirring evenly to form a suspension;

[0036] In step 4, the suspension is stirred for a gradient heating reaction, pressurized and cooled to form a flame-retardant polypropylene plate.

[0037] The concentration of the organosilicon raw mate...

Embodiment 2

[0045] A preparation method of a flame-retardant polypropylene plate, comprising the steps of:

[0046] Step 1, adding the organosilicon raw material into toluene, stirring at room temperature until completely dissolved to obtain a toluene solution; the organosilicon raw material is dimethyldichlorosilane;

[0047] Step 2, adding distilled water into a constant pressure dropping funnel, slowly adding it dropwise into the toluene solution at a constant temperature, stirring evenly, and standing for 5 hours to obtain an acidic hydrolyzate;

[0048] Step 3, passing ammonia gas into the acidic hydrolyzate until the hydrolyzate is neutral, adding an aluminum silicate catalyst, copolymerized polypropylene powder and homopolypropylene powder and stirring evenly to form a suspension;

[0049] In step 4, the suspension is stirred for a gradient heating reaction, pressurized and cooled to form a flame-retardant polypropylene plate.

[0050] The concentration of the organosilicon raw ma...

Embodiment 3

[0058] A preparation method of a flame-retardant polypropylene plate, comprising the steps of:

[0059] Step 1, adding the organosilicon raw material into toluene, stirring at room temperature until completely dissolved, to obtain a toluene solution; the organosilicon raw material is phenyltrichlorosilane;

[0060] Step 2, adding distilled water into a constant pressure dropping funnel, slowly adding it dropwise into the toluene solution at a constant temperature, stirring evenly, and standing for 3 hours to obtain an acidic hydrolyzate;

[0061] Step 3, passing ammonia gas into the acidic hydrolyzate until the hydrolyzate is neutral, adding an aluminum silicate catalyst, copolymerized polypropylene powder and homopolypropylene powder and stirring evenly to form a suspension;

[0062] In step 4, the suspension is stirred for a gradient heating reaction, pressurized and cooled to form a flame-retardant polypropylene plate.

[0063] The concentration of the organosilicon raw ma...

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Abstract

The invention belongs to the field of polypropylene board, and more specifically relates to a preparation method of a flame-resistant polypropylene board. The preparation method comprises following steps: 1, an organosilicon raw material is added into toluene, room temperature stirring is carried out until complete dissolving is realized so as to obtain a toluene solution; 2, distilled water is added into a constant pressure dropping funnel, and is added into the toluene solution dropwise slowly, uniform stirring is carried out, and an obtained product is allowed to stand for 2 to 5h so as toobtain an acidic hydrolysate; 3, ammonia gas is introduced into the acidic hydrolysate until the pH value of the hydrolysate is 7, an alumina silicate catalyst, co-polypropylene powder, and homo-polypropylene powder are added for uniform stirring so as to obtain a suspending liquid; and 4, the suspending liquid is subjected to gradient heating reaction, and is subjected to pressurization and cooling moulding so as to obtain the flame-resistant polypropylene board. The preparation method is capable of solving problems in the prior art that conventional polypropylene boards are poor in toughness, low temperature resistance, aging resistance, and flame resistance, and are high in moulding shrinkage rate; combined modification of organic silicone resin and alumina silicate is capable of improving the entire flame resistance and heat resistance.

Description

technical field [0001] The invention belongs to the field of polypropylene boards, and in particular relates to a preparation method of flame-retardant polypropylene boards. Background technique [0002] Polypropylene (Poyropylene, polypropylene) has been widely used in various fields of packaging and daily life such as industry, agriculture, medical treatment, and hygiene. It is due to its many sources of raw materials, low price, excellent material performance, good electrical insulation and chemical stability, and at the same time it has the advantages of easy processing and molding. Although polypropylene has many advantages, it also has its disadvantages, mainly manifested in poor toughness, low temperature resistance, aging resistance, large molding shrinkage, and easy combustion. At the same time, due to its non-polar characteristics, it is different from other polar The compatibility of polymers and inorganic fillers is poor, which limits the application as raw mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L83/08C08K3/34C08G77/24C08G77/08
Inventor 张伟
Owner 江苏宏佳华新材料科技有限公司
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