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Principles of Flame Retardant Selection
编辑:Fujian Wynca Technology Co.,Ltd时间:2021-05-08

General principles for the selection of flame retardants

◆An effective flame retardant should be able to physically or chemically affect one or several stages in the combustion process of the substance, delay the combustion of the substance and finally extinguish the combustion. For different stages of the combustion process, the applicable flame retardant may be different.

◆In the heating stage (that is, the first stage) of the combustion process, the flame retardant that can form a non-flammable coating layer around the flame retardant is effective. Flame retardants that can form an expanded coating layer when exposed to heat are also suitable for flame retardancy at this stage.

◆In the second stage of the combustion process, that is, the thermal degradation stage of combustibles, effective flame retardants can change the thermal oxidative degradation mode of combustibles through chemical means, reduce the concentration of combustible gas, or promote char formation, dehydrogenation and dehydration.

◆In the third stage of the combustion process, that is, when the gas generated by the decomposition of combustibles is ignited, any factor that increases the concentration of inflammable decomposition products and reduces the concentration of combustible decomposition products can produce flame retardant effects at this stage. In addition, if the flame retardant itself decomposes, or they can interact with the flame-retardant substrate to generate a gaseous free radical trapping agent, the burning rate can also be reduced.

◆After the combustible is ignited, it can reduce the heat transfer rate to the surface of the combustible, and the flame retardant that can relatively reduce the generation rate of free radicals that support combustion is also beneficial to slow the combustion process.

Performance comparison of three major series of flame retardants

Organic halogen

Organic Phosphorus

Inorganic Department


Representative products

Decabromodiphenyl ether, tetrabromobisphenol A

TCPP, BDP

Aluminum hydroxide, magnesium hydroxide

Flame retardant efficiency

Highest

high

Low

Environmental protection

Emit toxic and corrosive gas

Low toxicity, low corrosion, good smoke suppression effect

Low toxicity, low corrosion, good smoke suppression effect

compatibility

it is good

it is good

Difference

Main disadvantage

Large combustion smoke and release of toxic and corrosive gas

High volatility, poor thermal stability

A large amount of addition affects the physical and mechanical properties of the material

Advantageous application areas

General plastics, engineering plastics, etc.

Polyurethane, engineering plastics

General plastic, rubber

price

fair price

fair price

Lower

Major manufacturers of flame retardants

Major foreign manufacturers

Brominated flame retardant manufacturer

factory

type

Main application areas

Albemarle(Albemarle)company

17

ABS, HIPS, PA, TPE, PC, PP, PE, PVC, EPR, PFR, SI, EPDM, SAN, PO

Great Lakes(Great Lake)company

31

ABS, HIPS, PA, TPE, PC, PP, PE, PVC, EPR, EPDM, SAN, PUF, PBT

Dead Sea Bromine, Israel

20

EPS, textiles, adhesives, coatings, ABS, HIPS, EPR, PFR, PC, UP, PUF, PBT, PET, PS

Japan Tosoh Corporation

11

PS, ABS, PO, PP, PBT, PC, PA, EP, PVC, EPDM, PFR, PUF, EPR

American Ferro Corporation

2

PBT, PET, PA, HIPS

Organic phosphorus flame retardant

factory

type

Main application areas

Akzo Nobel, USA

27

FPUF, EPR, PFR, UP, PMMA, PVC, CE, PPO, PC

Great Lakes(Great Lake)company

5

EPS, UP, PUF, PP, YPE, PO, coatings, adhesives, textiles

American FMC Corporation

15

PVC, PUR, CE, PPO, PC/ABS, PET, NBR, SBR, PBT

American Albright-Wilson (Albright& Wilson))

7

PVC, PA, EPR, PE, PP, PS, PMMA, PUF, TPE, TPU, EVA

Antimony flame retardant

factory

type

Main application areas

American PQ Company

7

Textiles, non-woven fabrics, binders, fibers, EPR, ABS, HIPS, PP

American Amspec Company

7

Natural, synthetic and textile fabrics, and halogen-based flame retardants used in resins, coatings, adhesives, foam plastics and elastomers

Laurel Corporation

3

PE, PP, PS, ABS, PVC, EPDM, PU, ​​EPR

American Atochem North America Company

1

Used in conjunction with halogen-based flame retardants

American M& T company

5

PE, PBT, EPDM, PVC, HIPS, ABS, PA, EPR, UP, PC, PET

German Clariant Company

1

PA

Other inorganic flame retardants

factory

Types of

type

Main application areas

American Borax Company

Zinc borate

5

TPE, PA, PE, PP, UP, PVC, EPR, PEK, fluoropolymer

American Alcoa Company, American Albemarle Company


Aluminum series


5


PP, PVC, EPDM, UP, EPR, PA, PBT

American Martin Marietta Company, American Albemarle Company


Magnesium


3


PP, PS, PVC, PPO, EPDM, textile coating

Sherwin Williams, USA

Molybdenum series and molybdenum-silicon series

8

PVC

Japan Tosoh Corporation

Graphite, graphite-red phosphorus


9

PUF, PS, ABS, EPS, PO, PP, PBT, PET, PC, PA, EPR, PVC, EPDM

The above is what the editor wants to say about the principle of flame retardant selection. If you have other FR-V6 flame retardants,CR-504 flame retardant, etc. are available if neededcontact usTaizhou Ruishite New Material Co., Ltd.! ! !
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