A material for injection molding flame-retardant plastic seats for stadiums with excellent weather resistance

A flame-retardant plastic and weather-resistant technology, which is applied in the field of materials for stadium flame-retardant plastic seats, can solve the problems of large amount of addition, high price, and difficulty in industrialized production, and achieves the effects of easy injection molding, low price, and easy industrialization.

Active Publication Date: 2014-10-22
上海安凸塑料添加剂有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in 200480002250.3 and 201010022551.X patents, the effect of weather resistance is achieved by adding hindered amine light stabilizers (HALS) and ultraviolet absorbers. efficiency; on the other hand, antimony trioxide, a commonly used flame retardant synergist in the formulation, and its impurities (mostly heavy metals) have heavy metal catalytic decomposition of HALS, which will also reduce efficiency. Excellent flame retardancy and weather resistance, often excessive HALS is added to the formula, which is undoubtedly an increase in cost, and high weather resistance flame retardant polypropylene cannot be achieved by excessive addition
In addition, people also use Octabromobisphenol S bis-ether (also known as Octabromo-S ether) with better light stability and precipitation resistance to replace octabromoether and decabromodiphenyl ether, as used in patents 200610029852.9 and 200810025636.6 Octabromobisphenol S diether is used as a flame retardant for polypropylene. Even so, octabromobisphenol S diether still cannot overcome the resistance reaction with HALS, so its weather resistance cannot meet the actual use requirements
Moreover, the price of octabromo-S ether is high, and it is not easy for industrialized production, and the availability is poor, so it is not economical
In addition, although halogen-free flame retardants have good light stability, they are not suitable for public seats in stadiums due to large additions and high prices

Method used

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  • A material for injection molding flame-retardant plastic seats for stadiums with excellent weather resistance
  • A material for injection molding flame-retardant plastic seats for stadiums with excellent weather resistance
  • A material for injection molding flame-retardant plastic seats for stadiums with excellent weather resistance

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Experimental program
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Effect test

Embodiment 1

[0043] The following weight (kg) ratio of raw materials is used: polypropylene copolymer (7926, Shanghai Secco): 100, flame retardant masterbatch: 4.5, antioxidant 1010: 0.15, antioxidant 168: 0.4, hindered amine light stabilizer Tinuvin770 (Ciba): 0.5, hindered amine light stabilizer Chimassorb 944 (Ciba): 0.1. After the raw material ratio is mixed, the injection molding process can make the plastic chair. The injection molding process is: material temperature 180°C-200°C-210°C-220°C-220°C-220°C, injection pressure 60MPa, injection speed 50%.

[0044] Wherein the preparation method of flame retardant master batch comprises the following steps:

[0045](1) Prepare materials according to the following components and weight (kg): polypropylene 100, calcium hypophosphite 350, melamine hydrobromide 170, nano silicon dioxide (10nm) 30, dimethyldiphenylhexane 40, polyethylene Wax 20, antioxidant 1010 is 0.3;

[0046] (2) After mixing the above-mentioned components, add them to th...

Embodiment 2

[0049] The following weight (kg) ratio of raw materials is used: polypropylene copolymer (7926, Shanghai Secco): 100, flame retardant masterbatch: 3, antioxidant 1010: 0.1, antioxidant 168: 0.3, hindered amine light stabilizer Tinuvin770 (Ciba): 0.3. After the raw material ratio is mixed, the injection molding process can make the plastic chair. The injection molding process is as follows: material temperature 180°C-200°C-220°C-230°C-230°C-220°C, injection pressure 70MPa, injection speed 40%.

[0050] Wherein the preparation method of flame retardant master batch comprises the following steps:

[0051] (1) Prepare materials according to the following components and weight (kg): Copolypropylene 100, aluminum hypophosphite 300, melamine cyanurate 280, nano kaolin (30nm) 10, dimethyl diphenylbutane 15, polyethylene wax 6 , Antioxidant 1010 is 4, Antioxidant 168 is 2;

[0052] (2) After mixing the above-mentioned components, add them to the co-rotating twin-screw extruder to ex...

Embodiment 3

[0055] The following weight (kg) ratio of raw materials is used: polypropylene copolymer (7926, Shanghai Secco): 100, flame retardant masterbatch: 3.8, antioxidant 1010: 0.1, antioxidant 168: 0.3. After the raw material ratio is mixed, the injection molding process can make the plastic chair. The injection molding process is: material temperature 180°C-200°C-210°C-220°C-220°C-220°C, injection pressure 60MPa, injection speed 50%.

[0056] Wherein the preparation method of flame retardant master batch comprises the following steps:

[0057] (1) Prepare materials according to the following components and weight (kg): Copolypropylene 100, calcium hypophosphite 300, melamine 280, nano-montmorillonite (100nm) 10, polydiisopropylbenzene 15, polyethylene wax 6, antioxidant Agent 1010 is 4;

[0058] (2) After mixing the above-mentioned components, add them to the co-rotating twin-screw extruder to extrude and granulate. 180°C-190°C-200°C-200°C-210°C-210°C-220°C-210°C, then control t...

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Abstract

The invention relates to a material used in injection molding of stadium flame-retarding plastic seats with excellent weatherability. According to the invention, a raw material is placed in an injection molding mold, and injection molding is carried out, such that the seats are obtained. During the injection molding process, an injection molding material temperature is controlled at 180-230 DEG C, an injection molding pressure is controlled at 40-70MPa, and an injection molding speed is controlled at 40-60%. The raw material comprises the components of, by weight: 100 parts of polypropylene, 2-8 parts of a flame retardant masterbatch, 0.3-1.0 part of an antioxidant, and 0-1.0 part of a light stabilizer. Compared with prior arts, according to the invention, no antagonistic effect between the flame retardant and the light stabilizer is caused. With a universal light stabilizer, excellent weatherability can be achieved. The material is also advantaged in no precipitation, low cost, and easy injection molding. With the material, industrialized production is easy to realize.

Description

technical field [0001] The invention relates to a material for a plastic seat, in particular to a material for injection molding a stadium flame-retardant plastic seat with excellent weather resistance. Background technique [0002] With the mandatory national standard GB20286-2006 "Requirements and Marking of Flame Retardant Products and Components Combustion Performance in Public Places" which was officially implemented on March 1, 2007, people are paying more and more attention to fire safety in public places. The Ministry of Public Security has a very broad definition of public places, including stadiums (stadiums) and other public gathering places. The stadium is mainly composed of a sports field area and a seating area, and the seating area is a place where crowds gather. If the seats are made of ordinary non-flame-retardant materials, since the stadium is outdoors and rich in oxygen, a fire will spread rapidly to Adjacent areas are extremely unfavorable for crowd eva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08K13/02C08K3/32C08K5/3492B29C45/76B29C47/92B29B9/06B29C48/92
Inventor 付常俊杨玉成田铁生
Owner 上海安凸塑料添加剂有限公司
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