Free radical polymerization using acidified ethoxylated...

Details Free radical polymerization using acidified ethoxylated... Free radical polymerization using acidified ethoxylated...

2005-04-12

2005-04-12

Egwim, Kelechi C. (Department: 1713)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S145000, C524S366000, C524S368000, C524S832000, C526S193000, C526S328000, C526S328500, C526S911000

Reexamination Certificate

active

06878763

ABSTRACT:
The free radical initiated addition polymerization of ethylenically unsaturated, particularly acrylic monomers in which the dispersed phase is stabilised by a surfactant including at least one anionic surfactant compound of the formula (I): R1—(OA)n—X where R1is C16to C22hydrocarbyl including at least two double bonds; OA is oxyalkylene group; n is from 2 to 60; and X includes at least one acidic H atom, and is particularly a phosphate ester group, or a salt thereof, is described. The use of the surfactants of the formula (I) enable efficient emulsification and thus polymerization at temperatures above those at which non-ionic unsaturated surfactants are effective. The polymer latex products give polymer films having good water resistance properties.

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