Scorch retardants for rubber reinforced with siliceous pigment a

Details Scorch retardants for rubber reinforced with siliceous pigment a Scorch retardants for rubber reinforced with siliceous pigment a

1975-07-08

1977-01-11

Czaja, Donald E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 4232, 260 4233, 260 4247, 260 4249, 260765, 260784, 260786, 526295, 526335, 526336, 526338, 526340, C08K 334, C08K 336

Patent

active

040025942

ABSTRACT:
Rubber vulcanizates reinforced with siliceous pigment have desirable properties. The addition of a mercapto-type coupling agent hastens curing and strengthens adhesion between the rubber polymer and the silica, but tends to cause premature vulcanization or scorch. The further addition of a thiomorpholine compound such as 4,4'-dithiodimorpholine or 2-(4-morpholinothio)-benzothiazole retards scorch and improves stress/strain properties and abrasion resistance, but affects curing time only moderately.

REFERENCES:
patent: 3364059 (1968-01-01), Marzocchi
patent: 3768537 (1973-10-01), Hess et al.
patent: 3798196 (1974-03-01), Rocktaschel et al.
patent: 3838114 (1974-09-01), Lawrence
patent: 3842111 (1974-10-01), Meyer-Simon et al.
patent: 3873489 (1975-03-01), Thurn et al.
patent: 3910864 (1975-10-01), Son
Alliger et al., Vulcanization of Elastomers (Reinhold) (N.Y.) (1964), p. 180.

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