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A kind of ultra-soft halogen-free flame-retardant thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer, ultra-flexible technology, applied in the field of thermoplastic elastomer and its preparation, thermoplastic elastomer materials, can solve the problems of large amount of flame retardant addition, large loss of material mechanical properties, elastic damage to elastic body, etc., to achieve Excellent flame retardant performance, economical processing, recyclable, good flexibility

Active Publication Date: 2015-08-26
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These studies are mainly divided into two categories: one is the use of traditional halogen flame retardants, although the flame retardant effect is good, the addition amount is relatively low, and the performance of the elastomer is well maintained, but this type of material will produce flame retardants when exposed to fire or high temperature. A large amount of smoke, toxic gases and corrosive gases are difficult to meet the needs of practical applications; the other is to use environmentally friendly hydroxides or nitrogen-phosphorus flame retardants, but the addition of these flame retardants is very large, and high filling amounts are harmful to The mechanical properties of the material are greatly lost, and the flexibility of the elastomer is greatly damaged.

Method used

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  • A kind of ultra-soft halogen-free flame-retardant thermoplastic elastomer and preparation method thereof
  • A kind of ultra-soft halogen-free flame-retardant thermoplastic elastomer and preparation method thereof
  • A kind of ultra-soft halogen-free flame-retardant thermoplastic elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Step (1). Add 50g of ethylene vinyl acetate EVM, 50g of ethylene vinyl acetate EVA and 0.01g of dicumyl peroxide DCP to an internal mixer with a rotor speed of 80r / min at 160°C for dynamic vulcanization for 5 minutes After drying, the base material is obtained.

[0044] Step (2). At 160°C, 25g of the base material and 25g of aluminum hydroxide were added to an internal mixer with a rotor speed of 80r / min to melt and blend for 5 minutes, and the material was discharged to obtain a super-soft halogen-free flame-retardant thermoplastic elastomer;

[0045] The mass ratio of ethylene vinyl acetate cross-linked product, ethylene vinyl acetate EVA, dicumyl peroxide DCP, and flame retardant in the ultra-soft halogen-free flame-retardant thermoplastic elastomer obtained in Example 1 is 50:50:0.01 : 100; the flame retardant is aluminum hydroxide.

Embodiment 2

[0047] Step (1). Same as the experimental conditions of Example 1, the base material is obtained;

[0048] Step (2). At 160°C, 25g of base material and 25g of magnesium hydroxide were added to an internal mixer with a rotor speed of 80r / min to melt and blend for 5 minutes, and the material was discharged to obtain a super-soft halogen-free flame-retardant thermoplastic elastomer;

[0049] The mass ratio of ethylene vinyl acetate cross-linked product, ethylene vinyl acetate EVA, dicumyl peroxide DCP, and flame retardant in the ultra-soft halogen-free flame-retardant thermoplastic elastomer obtained in Example 2 is 50:50:0.01 : 100. The flame retardant is magnesium hydroxide.

Embodiment 3

[0051] Step (1). Same as the experimental conditions of Example 1, the base material is obtained;

[0052] Step (2). At 160°C, add 25g of base material, 24g of magnesium hydroxide, and 1g of nitrogen-phosphorus expansion flame retardant NP-P20X to an internal mixer with a rotor speed of 80r / min to melt and blend for 5 minutes, and discharge to obtain Super soft halogen-free flame retardant thermoplastic elastomer;

[0053] The mass ratio of ethylene vinyl acetate cross-linked product, ethylene vinyl acetate EVA, dicumyl peroxide DCP, and flame retardant in the ultra-soft halogen-free flame-retardant thermoplastic elastomer obtained in Example 3 is 50:50:0.01 : 100; the flame retardant is magnesium hydroxide, nitrogen phosphorus expansion flame retardant NP-P20X.

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Abstract

The invention discloses a supersoft halogen-free flame retardant thermoplastic elastomer and a preparation method thereof. The existing commercialized thermoplastic elastomer hardly realizes integration of halogen-free flame retardance and softness. The elastomer is a blend which comprises ethylene vinyl acetate crosslink, ethylene vinyl acetate (EVA), a peroxide vulcanizing agent and a flame retardant. The method comprises the following steps of: carrying out dynamic vulcanization on the ethylene vinyl acetate (EVM), ethylene vinyl acetate (EVA) and the vulcanizing agent according to the mass ratio of 1000:1000:0.1-5 at the temperature of 30-200 DEG C, drying and preparing a base material; and adding the flame retardant into the base material, fusing and blending at the temperature of 140-250 DEG C, and discharging to prepare the elastomer. The supersoft halogen-free flame retardant thermoplastic elastomer disclosed by the invention has the advantages of good softness, excellent flame retardance, no halogen, simple industrial preparation, economical processing and recoverability.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to an environmentally friendly thermoplastic elastomer material, in particular to a thermoplastic elastomer with high flexibility, good resilience, halogen-free flame retardancy and a preparation method thereof. Background technique [0002] Since the 1950s, the use of polymer materials has become more and more extensive, and the amount of use has increased rapidly. The resulting fire hazard has also increased, resulting in higher and higher requirements for flame retardant regulations on polymer materials. In order to reduce the flammability and flame propagation rate of polymer materials, flame retardants have been developed rapidly. Flame retardants currently used in various polymer materials have become important polymer material additives second only to plasticizers. Reducing the flammability and flame propagation speed of polymer materials is the basic requirement for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L31/04C08L23/08C08K5/14C08K7/24C08K3/22C08K3/34C08K3/38C08K9/10C08K3/02
Inventor 李勇进陆凯
Owner HANGZHOU NORMAL UNIVERSITY
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