Controlling premature curing of vulcanizable halogen-containing

Details Controlling premature curing of vulcanizable halogen-containing Controlling premature curing of vulcanizable halogen-containing

1996-07-22

1997-09-09

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...

5253311, 525384, C08C 1922, C08F 800

Patent

active

056658303

ABSTRACT:
A process of reducing the effects of moisture during storage prior to vulcanization of a vulcanizable halogen-containing polymer composition containing water, comprising blending before storage, into said vulcanizable composition, a thioester derivative of 2,5-dimercapto-1,3,4-thiadiazole crosslinking agent and polyethylene glycol, whereby the scorch time of the vulcanizable compound is not significantly affected by the water content of said composition. The invention is also directed to a vulcanizable halogen containing material and a dry pourable composition, both comprising the crosslinking agent and polyethylene glycol, as well as a process of reworking such a halogen-containing vulcanizable composition.

REFERENCES:
patent: 3355423 (1967-11-01), Scullin et al.
patent: 4128510 (1978-12-01), Richwine
patent: 4288576 (1981-09-01), Richwine
patent: 4392262 (1983-07-01), Jablonski
patent: 4434274 (1984-02-01), Jablonski
patent: 4482681 (1984-11-01), Berta
patent: 4591617 (1986-05-01), Berta
patent: 4745147 (1988-05-01), Honsberg
patent: 5229197 (1993-07-01), Peterson
Hercules Incorporated Elastomer Chemicals--"Echo.TM. S Vulcanizing Agent", Dec. 1978.
Hercules Incorporated Elastomer Chemicals--"Echo.TM. P Vulcanizing Agent", Dec. 1978.
ASTM D 2084-92--"Standard Test Method for Rubber Property--Vulcanizing Using Oscillating Disk Cure Meter".
European Patent Office Communication purusuant to Article 96(2) and Rule 51(2) EPC.
Rompp Chemie Lexikon, p. 3532 (1992).

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