Page 303 - Handbook of Plastics Technologies

ELASTOMERS

ELASTOMERS 4.95

TABLE 4.14 Example Rubber Compound Recipes (Continued)
Silica-filled butyl rubber NBR injection molding
compound compound
IIR (Butyl 365) 100 NBR (Chemigum N685B) 100
Hi-Sil 233 40 N774 (SRF-NS carbon black) 65
Naphthenic oil 5 Zinc oxide 4
Tris(2-butoxyethyl)phosphate 3 Mixed diaryl-p-phenylenedi- 2
(plasticizer) amines (Wingstay 100 anti-
degradant)
Stearic acid 1 Plasticizer 15
Zinc oxide 5 Stearic acid 0.5
Polyethylene glycol PEG 4000 3 Tetramethylthiuram disulfide 1.7
(TMTD accelerator)
Sulfur 1 N-Oxydiethylenebenzothiazole- 1.7
2-sulfenamide (OBTS acceler-
ator)
60% tetramethylthiuram disul- 2 Sulfur 0.6
fide/40% tetraethylthiuram dis-
ulfide
Dipentamethylenethiuram hexas- 1
ulfide
Cure 30 min at 160°C Cure 15 min at 160°C

Epichlorohydrin seal compound Acrylic elastomer seal compound
Epichlorohydrin rubber (Hydrin 100 Soap/sulfur-curable ACM 100
C2000)
N-550 45 FEF Black (N-550) 55
Di-(butoxyethoxyethyl) adipate 15 Stearic acid 2
Zinc 2-mercaptobenzimidazole 1 Agerite Superflex (diphenyl)- 2
(antidegradant) amine-acetone reaction prod-
uct) antidegradant
Stearic acid 1 Sodium stearate 3
Calcium carbonate 5 Potassium stearate 0.4
Magnesium oxide 3 Sulfur 0.3
2,4,6-Trimercapto-S-triazine 0.8
(Zisnet F-PT)
Cure 15 min at 200°C Cure 15 min at 175°C and post-
cure 8 hr a 175°C

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