Fluoroelastomer composition with low tendency to foul molds

Details Fluoroelastomer composition with low tendency to foul molds Fluoroelastomer composition with low tendency to foul molds

1988-03-14

1990-09-18

Lipman, Bernard

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

Synthetic resins

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

5253262, 5253263, 525351, 5253591, 525368, 525369, C08F 800

Patent

active

049579754

ABSTRACT:
A composition that exhibits low tendency to foul mold cavities comprising a fluoroelastomer of vinylidene fluoride units and units of at least one other fluorine-containing monomer copolymerizable with vinylidene fluoride; a bisphenol or a polyhydroxy phenol crosslinking agent of the formula ##STR1## where R is H, alkyl or aryl and R' is alkyl or aryl; a divalent metal oxide or hydroxide; and 0.2-4 parts by weight per 100 parts by weight fluoroelastomer of a crosslinking accelerator which is a quaternary ammonium salt of the formula R".sub.4 N.sup.+ X.sup.- wherein each R" is independently an alkyl group of 2-10 carbon atoms or an aralkyl group of 7-10 carbon atoms and X.sup.- is selected from the group consisting of fluoride, dihydrogen phosphate, periodate, acetate, hydrogen sulfate, methane sulfonate, toluene sulfonate, or an anion of a bisphenol or a polyhydroxy phenol.

REFERENCES:
patent: 3655727 (1972-04-01), Patel et al.
patent: 3752787 (1973-08-01), de Brunner
patent: 3809672 (1974-05-01), Stivers
patent: 3884877 (1975-05-01), Kolb
patent: 3988502 (1976-10-01), Patel et al.
patent: 4496682 (1985-01-01), Schmiegel

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