Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1978-09-15
1979-08-14
Seccuro, Carman J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
260 296RB, 260 308DS, 260 326N, 260DIG24, 525307, 525309, 525317, C08L 3320
Patent
active
041645227
ABSTRACT:
Crosslinked vinylidene chloride polymer microgel powders are recovered from a latex obtained by emulsion polymerizing in sequence (a) a first monomer mixture comprising a predominant amount of vinylidene chloride, an ethylenically unsaturated comonomer, and a crosslinking polyfunctional monomer; (b) a minor amount of a polyfunctional monomer for providing graft sites on the product of (a); and (c) a second monomer mixture which is predominantly acrylonitrile, the amount of the second monomer mixture being in the range of about 10 to 25 percent of the weight of the first monomer mixture. The so-formed microgels, having a particle size less than about 1 micron, are admixed with an acrylic polymer and a suitable solvent and then spun into fibers having improved flame-retardancy.
REFERENCES:
patent: 2949437 (1960-08-01), Hobson
patent: 3288888 (1966-11-01), Wiechkowski
patent: 3963790 (1976-06-01), Couchoud
patent: 4101621 (1978-07-01), Yamamoto et al.
Seccuro Carman J.
The Dow Chemical Company
Wills Thomas R.
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