Blend compositions

Details Blend compositions Blend compositions

1977-11-29

1979-04-24

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 237R, 260 285B, 260 336AQ, 260 4243, 260 4247, 260DIG31, C08L 9100

Patent

active

041511379

ABSTRACT:
This invention relates to injection moldable and extrusion type elastomeric compositions having a viscosity at 200.degree. C. at 0.73 sec.sup.-1 of less than about 8.times.10.sup.5 poises. The compositions used for elastomeric articles include 100 parts of a neutralized sulfonated EPDM terpolymer; less than about 200 parts per hundred of a paraffinic, low polarity process oil; about 25 to about 200 parts per hundred of an amorphous silica filler treated or untreated; and a preferential plasticizer at about less than 50 parts per hundred based on 100 parts of the sulfonated elastomeric polymer. The composition may also include a crystalline polyolefinic thermoplastic at less than about 100 parts per hundred by weight per 100 parts of sulfonated polymer.
These blend compositions can be readily processed due to their superior rheological properties on conventional plastic fabrication equipment, especially on low and high pressure injection molding or extrusion equipment into elastomeric articles having excellent physical properties and desirable rubbery characteristics.

REFERENCES:
patent: 3642728 (1972-02-01), Canter
patent: 3847854 (1974-11-01), Canter et al.
patent: 3974240 (1976-08-01), Bock et al.
patent: 3974241 (1976-08-01), Lundberg et al.

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