Dialkylthiourea cured elastomeric roofing composition

Details Dialkylthiourea cured elastomeric roofing composition Dialkylthiourea cured elastomeric roofing composition

1995-05-18

1997-01-14

Henderson, Christopher

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253327, 525352, C08C 1920

Patent

active

055940730

ABSTRACT:
Disclosed are ambient temperature-curable roofing compositions and ambient temperature-curable sheeting compositions, both of which include an elastomer or elastomer mixture such as ethylene-propylene non-conjugated diene terpolymer, butyl rubber, and mixtures thereof. Such elastomers are cured with conventional dialkylthiourea and sulfur type curatives. Also used are conventional thiuram and dithiocarbamate type accelerators. The compositions thus produced are essentially free of hexasulfide compounds which are known to have the structural formula [(CH.sub.2).sub.n NCS].sub.2 S.sub.6, wherein "n" is 4 or 5.

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patent: 4461875 (1985-04-01), Crepeau
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patent: 4666785 (1984-07-01), Crepeau

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