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Halogen-free flame-retardant high-density polyethylene material and preparation method and application thereof

A high-density polyethylene and low-density polyethylene technology is applied in the field of halogen-free flame-retardant high-density polyethylene materials and preparation, and can solve the problems that the flame-retardant technology cannot meet the market demand, high toughness requirements, and low flame-retardant requirements. Achieve excellent self-extinguishing properties, excellent mechanical properties, and good flame retardant efficiency

Inactive Publication Date: 2020-01-24
GUANGDONG JUSHI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the flame retardants commonly used in HDPE in the market are halogen antimony flame retardant system, hydroxide system and APP flame retardant system. The advantage of halogen flame retardants is that the flame retardant performance is stable, and can be prepared according to requirements to meet the various standards of UL. Flame-retardant HDPE, the main disadvantage is that it generates more smoke when burning, and produces corrosive and toxic gases, forming secondary pollution
With the increasing awareness of environmental protection and the gradual attention of environmentally friendly flame retardants, the application of halogenated flame retardants has been increasingly restricted
However, the addition of flame retardants in the hydroxide system and the APP flame retardant system is large, the mechanical properties are severely damaged, and only one flame retardant level can be achieved.
[0004] For some HDPE products that require halogen-free flame retardancy, such as some non-load-bearing plastic boxes and trash cans, etc., the requirements for flame retardancy are relatively low, and they are required to meet UL94 V-2. The flame retardant does not precipitate, but it requires high toughness. Some flame retardant technologies cannot meet market demand

Method used

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  • Halogen-free flame-retardant high-density polyethylene material and preparation method and application thereof
  • Halogen-free flame-retardant high-density polyethylene material and preparation method and application thereof
  • Halogen-free flame-retardant high-density polyethylene material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This example provides a halogen-free flame-retardant high-density polyethylene material, including the following raw materials in parts by weight:

[0061] HDPE: 80-95 parts,

[0062] Halogen-free compound flame retardant: 5-15 parts,

[0063] Flame retardant synergist: 0.1 parts,

[0064] Antioxidant: 0.2~0.8 parts,

[0065] Lubricant: 0.3 to 0.7 parts.

[0066] Among them, the flexural modulus of HDPE is 750-900 MPa. The elongation at break of HDPE is >800%. The melt index of HDPE under the test conditions of 190°C and 2.16kg is 4g / 10min~50g / 10min.

[0067] The halogen-free compound flame retardant is a P-N compound flame retardant, and the mass ratio of the P-based flame retardant to the N-based flame retardant in the P-N compound flame retardant is 1: (0.5-10). The P-based flame retardant includes at least one of hypophosphorous acid, aluminum hypophosphite, calcium hypophosphite, aluminum diethylphosphinate, and aluminum phenylphosphinate. The N series flame...

Embodiment 2

[0072] This example provides the preparation method of halogen-free flame-retardant high-density polyethylene material, the process is as follows figure 1 As shown, the steps include:

[0073] S1: Weigh the LDPE, halogen-free compound flame retardant, antioxidant and lubricant according to the proportion and mix them;

[0074] S2: After kneading by a twin-screw extruder, extrude and granulate to obtain the halogen-free flame-retardant low-density polyethylene material.

[0075] Specifically, the preparation method of the above-mentioned halogen-free flame-retardant high-density polyethylene material, the steps include:

[0076] 1) Feed HDPE into the twin-screw extruder through the 1# loss-in-weight weighing bin from the main feeding port;

[0077] 2) Compound the P-N compound flame retardant according to the proportion and add it to the 2# loss-in-weight weighing chamber, and then add the flame-retardant synergist, antioxidant and lubricant to the 3# weight-loss weighing cha...

Embodiment 3

[0084] This example provides the application of halogen-free flame-retardant high-density polyethylene material in non-load-bearing plastic bins and trash cans.

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Abstract

The embodiment of the invention provides a halogen-free flame-retardant high-density polyethylene material and a preparation method and application thereof. According to the halogen-free flame-retardant high-density polyethylene material, the flame-retardant property UL94 reaches a V-2 level, the mechanical property is excellent, and the elongation at break of a workpiece reaches 842%; the material can be recycled, is environment-friendly and halogen-free, does not generate corrosive gases during combustion and has excellent self-extinguishment; and the problem that in the prior art, a halogen-free flame-retardant technology of HDPE has an environment-friendly problem in mechanical property and bromine-antimony flame retarding is solved.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant materials, and in particular relates to a halogen-free flame-retardant high-density polyethylene material, a preparation method and an application. Background technique [0002] High Density Polyethylene (HDPE for short) is a white powder or granular product, non-toxic, tasteless, with a crystallinity of 80%-90%, a softening point of 125-135°C, and a service temperature of up to 100°C. The hardness, tensile strength and creep of HDPE are superior to that of low-density polyethylene. It has better wear resistance, electrical insulation, toughness and cold resistance, and good chemical stability. It is insoluble in any organic solvent at room temperature. HDPE is resistant to acid, alkali and various salts. The film has low permeability to water vapor and air, low water absorption, poor aging resistance, and environmental stress cracking resistance is not as good as low-density polyethylene....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K3/32C08K5/3492C08K5/01C08K5/20C08K13/02B29B9/06
CPCB29B9/06C08K3/32C08K5/01C08K5/20C08K5/34922C08K5/34928C08K13/02C08L2201/02C08L2201/22C08L2207/062C08L23/06
Inventor 沈旭渠陈锐彬刘鹏辉黄方雁吕伟刘俊汪洋
Owner GUANGDONG JUSHI CHEM CO LTD
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