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Title: Hypalon® (DuPont)
CAS Registry Number: 9008-08-6
Literature References: Elastomer made by substituting chlorine and sulfonyl chloride groups into polyethylene. Prepd from polyethylene of average mol wt of about 20,000; contains approx one chlorine atom for each seven carbon atoms and one sulfonyl chloride group for every ninety carbon atoms. Three types of Hypalon are available: 20, 30, and 40 with sp gr of 1.12, 1.28, and 1.18, respectively. Prepn: Reed, Horn, US 2046090 (1933). Reviews: Ullmanns Encyklop├Ądie der technischen Chemie vol. 9, 342 (1957); Keeley, "Hypalon Synthetic Rubber" in Introduction to Rubber Technology, Morton, Ed. (Reinhold, New York, 1959) p 349.

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