Polychem Alloy Clocell

CLOCELL^®

STRUCTURE

CLOCELL^® is a thermoexpandable microcapsule of liquid hydrocarbon surrounded by a thick thermoplastic resin shell. The thick shell of Clocell^®gives it pressure resistibility of up to 300 kg/cm, which makes it resistant to the destructive power of high-speed rotating blades. The thick shell and globular shape also give Clocell ^® its unique heat and solvent resistant capabilities.

EXPANSION MECHANISM

Heating Clocell^® microcapsules causes the shell material to soften, which increases the internal pressure and allows the blowing agent to expand. The tensile strength of the shell material balances with the internal pressure from the vaporized hydrocarbon gas. Further heating allows the gas to pass through the thinned shell material, which increases the tensile strength of the shell. The resulting product is a low-density foamed layer with almost no possibility of bursting or punctures. Clocell^® products have excellent heat and solvent resistance, and prohibit yellowing or breakdown caused by prolonged exposure to heat, ultraviolet radiation, or high pH atmospheres.

SOLVENT RESISTANCE

Microsphere expandability was checked on Clocell^® 10007 after the exposure of unexpanded particles in each solvent for 10 days at 40 degrees centigrade.

SOLVENTS		SOLVENTS
Benzene	O	Cloroform	O
Toluene	O	Perchlorethylene	O
Xylene	O	Styrene	O
Methanol	X	Ethyl acetate	O
Ethanol	X	DBP	O
Isopropyl alcohol	O	DOP	O
n-Butanol	O	DINP	O
Ethylene glycol	O	Acetone	X
n-hexane	O	MEK	-
Cyclohexane	O	Cyclohexanone	-
Terpene	O	DMF	X
O = Practically no change in expandability X = Reduced expandability - = No expansion

Since the polymer of the shell material has superior softness, hardly any burst or puncture occurs under normal use.

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"from Concept to Completion...."