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Expandable Graphite

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SKU# 148

Product Detail

CAS No.: 7782-42-5

Expandable graphite from ACS Material is a specially synthesized intercalation compound of graphite. Graphite’s flaky, layered structure makes it possible to introduce outside atoms or small molecules between the graphite layers. This process is called intercalation and the result is an expandable graphite salt or a graphite intercalation compound (GIC.) The material gets its name because, when exposed to heat, the intercalated graphite layers expand and separate like an accordion. The final expanded volume can be hundreds of times greater than the initial volume of the material. The intercalation agent and the proportion of intercalated layers determine the temperature at which expansion begins and the rate at which expansion occurs.

Expansion of the flake graphite decreases the material’s overall bulk density while increasing its surface area; this change yields a material that demonstrates increased chemical reactivity over the original material. Expandable graphite is valued as a flame retardant. Expansion creates an intumescent layer on the surface of the graphite flake that slows the spread of fire and minimizes the creation of toxic fumes and gases.

Expandable graphite is also a component in a number of additional applications, including:

  • Batteries
  • Coatings
  • Plastic foils
  • Rubber products
  • Heating and cooling systems
  • Energy storage systems
  • Sealing systems
  • And many others
 
Product No.

Expansion

Start

Temperature

(EST‚ °C)

pH Mesh

Packing Density

(mg/cm3)

Expansion Volume
(EV‚ ml/g)
Property
EG-175-350 175 7.0 50 0.5 350

Highest Expansion

Volume

*EG-170-400 170 7.0 80 0.5 400

Highest

Expansion Volume

EG-180-250

180 7.0 80 0.5 250  
EG-250-180 250 7.0 80 0.5 180  
EG-300-170 300 7.0 80 0.5 170

Highest Expansion 

Start Temperature

 

*This product has been discontinued.

New Products List

SKU Mesh Purity (%) Expansion Start
Temperature (℃)
Expansion Volume (ml/g) Properties/Highlights Package Size
CXG5C022 50 ≥98 175 ≥350 High purity, very high free expansion and expansion strength 200g
CXG5B022 50 ≥99 180 ≥250 High purity, soft ash, for application require least instruments damage 200g
CXG5B122 50 ≥95 180 ≥250 Standard product for all main applications 200g
CXG8B122 80 ≥95 180 ≥230 For main application in EPS, XPS foam, sealing strip and PU foam 200g
CXGAA222 150 ≥92 175 ≥150 Mainly used in fabric coatings, fire-resistant coatings, fire-resistant adhesives and EPS and XPS flame retardants 200g
CXG52322 50 ≥90 180 ≥200 Stronger char 200g
CXG22022 -200 ≥94 180 ≥20 Finest particle size, min 80% below 75mircon for coatings, impregnation 200g
CXG21122 -100 ≥95 180 ≥35 Fine particle size, min80% below 150micron/100mesh 200g

Please also take a look at our Lower Temperature Expandable Graphite.

Products No.

Expansion

Start

Temperature

(EST‚ °C)

pH   Mesh  

Packing Density

(mg/cm3)

 Expansion Volume
(EV‚ ml/g)
 Property
EG-110-230 110 7.0 80 0.6 230

Super-low Expansion 

Start Temperature

EG-150-230  150 7.0  80 0.6 230  

 

Research Citations of ACS Material Products