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Composite flame retardant and its preparation method and application

A technology for compounding flame retardants and flame retardants, applied in chemical instruments and methods, lamination, coatings, etc., can solve the problem of slowing down the curing rate, reducing the curing speed of resin-based composite materials, affecting the curing speed of resin-based composite materials problems, to achieve good solvent resistance, improved thermal and mechanical properties

Active Publication Date: 2022-05-03
ZHEJIANG WAZAM NEW MATERIAL CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, the process of additive flame retardant is simple and the cost is low. It is the most widely used method, but it needs a large amount to meet the flame retardant requirements, which will generally have a negative impact on the thermal properties of resin-based composite materials. In addition, The use of additive flame retardants will reduce the curing speed of resin-based composites
Although the flame retardant effect of reactive flame retardants and flame retardant resins is better than that of additive flame retardants, and has little effect on the thermal properties of resin-based composites, these two flame-retardant methods are important in the performance of resin-based composites. During the curing process, some small molecular substances that slow down the curing rate will be produced, which will also affect the curing speed of the resin-based composite material

Method used

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  • Composite flame retardant and its preparation method and application
  • Composite flame retardant and its preparation method and application
  • Composite flame retardant and its preparation method and application

Examples

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preparation example Construction

[0049] The present invention also provides the preparation method of described composite flame retardant, mainly comprises the following steps:

[0050] S11, blending a thermoplastic elastomer and a non-reactive compatibilizer to obtain a premix, wherein the blending temperature is greater than the melting temperature of the thermoplastic elastomer;

[0051] S12, blending the premix with a reactive compatibilizer and a plasticizer to obtain a first mixture, wherein the plasticizer includes a reactive plasticizer and / or a non-reactive plasticizer;

[0052] S13, blending the first mixture with a flame retardant to obtain a second mixture; and

[0053] S14, cooling the second mixture, granulating, and pulverizing to obtain a composite flame retardant.

[0054] In order to fully melt the thermoplastic elastomer, in step S11, the temperature difference between the blending temperature and the melting temperature of the thermoplastic elastomer is 15°C-30°C.

[0055] It should be n...

Embodiment 1

[0089] 60 parts by weight of EMPPS (olefinic thermoplastic elastomer, the mass ratio of soft segment and hard segment is about 7:3, and the melting temperature is 170 ° C) is first placed in a vacuum oven at 50 ° C for 6 hours, and the dried EMPPS and 0.8 parts by weight of nano-modified organic montmorillonite was placed in an internal mixer, blended at 190°C for 3 minutes, and 1.5 parts by weight of carboxyl-terminated liquid nitrile rubber and 1.6 parts by weight of bisphenol A-diglycidyl ether were added. Blending for another 2.5 minutes, finally adding 28 parts by weight of ammonium polyphosphate and 12 parts by weight of aluminum hydroxide, blending for 5 minutes and mixing uniformly, the obtained mixture was cooled, granulated, and frozen and pulverized into particles with a particle size of 5 μm-30 μm. powder to obtain a composite flame retardant, and the melting temperature of the composite flame retardant is below 155°C.

[0090] With the isophthalic acid hydrazide o...

Embodiment 2

[0101] 45 parts by weight of TPEE (polyether ester thermoplastic elastomer, the mass ratio of the soft segment and the hard segment is 8.5:1.5, and the melting temperature is 175 ° C) is first placed in a vacuum oven at 50 ° C for 5 hours, and the dried TPEE and Put 0.4 parts by weight of nanocellulose into an internal mixer, blend for 2 minutes at 200°C, add 1.2 parts by weight of liquid isoprene rubber with carboxyl-terminated liquid isoprene rubber and 0.7 parts by weight of bisoxazoline, and then blend for 4 Minutes, finally add 18 parts by weight of phosphine oxide and 10 parts by weight of melamine cyanurate, blend for 4 minutes and mix evenly, the obtained mixture is cooled, granulated, and frozen and pulverized into a powder with a particle size of 5 μm-30 μm. A composite flame retardant is obtained, and the melting temperature of the composite flame retardant is below 160°C.

[0102] 4.5 parts by weight of sebacic acid dihydrazide, 3.0 parts by weight of chlorendic an...

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Abstract

The invention relates to a composite flame retardant and its preparation method and application. The composite flame retardant includes a matrix, a flame retardant and a non-reactive compatibilizer dispersed in the matrix, and the matrix includes a thermoplastic elastomer and a reactant; wherein the reactant is a reaction product of a thermoplastic elastomer and a reactive compatibilizer, A non-reactive plasticizer is also dispersed in the matrix; or, the reactant is a reaction product of a thermoplastic elastomer, a reactive compatibilizer, and a reactive plasticizer; or, the reactant is a thermoplastic elastomer and a reactive compatibilizer , The reaction product of a reactive plasticizer, and a non-reactive plasticizer is also dispersed in the matrix. The structure of the composite flame retardant of the present invention remains intact during the preparation process of the prepreg, and during the preparation process of the resin-based composite material, the composite flame retardant releases the flame retardant after curing, and the curing time of the resin-based composite material is not affected , and excellent thermal and mechanical properties.

Description

technical field [0001] The invention relates to the technical field of resin-based composite materials, in particular to a composite flame retardant and a preparation method and application thereof. Background technique [0002] In traditional methods, the flame retardant treatment methods for resin-based composite materials include: reactive flame retardant, additive flame retardant, and halogenation or introduction of flame retardant elements to prepare flame retardant resins. [0003] Among them, the process of additive flame retardant is simple and the cost is low. It is the most widely used method, but it needs a large amount to meet the flame retardant requirements, which will generally have a negative impact on the thermal properties of resin-based composite materials. In addition, The use of additive flame retardants will reduce the curing speed of resin-based composites. Although the flame retardant effect of reactive flame retardants and flame retardant resins is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/02C08L23/00C08L67/00C08L1/02C08L77/00C08L83/04C08L27/06C08K9/04C08K3/34C08K3/32C08K3/22C08K5/5397C08K5/3492C08K5/5399B32B17/04B32B17/12B32B33/00B32B37/10B32B37/06B32B38/10
CPCC08L63/00B32B5/02B32B5/26B32B33/00B32B37/10B32B37/06B32B38/10B32B2255/02B32B2255/26B32B2262/101B32B2262/106B32B2262/0269B32B2307/3065C08L2201/02C08L2207/04C08L2205/035C08K2003/323C08K2003/2227C08L23/00C08K9/04C08K3/346C08K3/32C08K3/22C08L67/00C08L1/02C08K5/5397C08K5/34928C08L77/00C08L83/04C08K5/5399C08L27/06
Inventor 傅楚娴任英杰陈华刚洪机剑李仁东骆钰栋虞德坤刘小祥
Owner ZHEJIANG WAZAM NEW MATERIAL CO LTD
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