Fluorinated acrylic and methacrylic latices and mixtures thereof

Details Fluorinated acrylic and methacrylic latices and mixtures thereof Fluorinated acrylic and methacrylic latices and mixtures thereof

1995-10-18

1998-08-25

Reddick, Judy M.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

523201, 524458, 524460, 524520, 524546, 524805, C08J 302

Patent

active

057984069

ABSTRACT:
This fluorinated (meth)acrylic latex consists of a dispersion of particles or of a mixture of dispersions of particles, these dispersions being obtained by emulsion polymerization in an aqueous medium, in at least one stage, wherein one more perfluorinated monomer(s) of formula (I) has/have been used as sole fluorinated comonomer(s) for the formation of the particles, and which is/are distributed statistically in particles formed in one stage or distributed statistically in the shell of structured particles of the core-shell or core-intermediate layer(s)-shell type resulting from a polymerization in two stages and in more than two stages, respectively, the said latex consisting of a dispersion of the said structured particles or of a mixture of at least one dispersion of the said fluorinated structured particles and/or at least one dispersion of the said fluorinated statistical particles and at least one dispersion of unfluorinated statistical particles, the monomer or monomers of formula (I) representing less than 80% by weight of the shell of the fluorinated structured particles, the proportion of monomers of formula (I) relative to the collective monomers used to form all of the particles of the said latex being between 1.8 and 20% by weight. ##STR1## R.sup.1 .dbd.CH.sub.3 or H; R.sup.2 =perfluorinated C.sub.1 -C.sub.10 alkyl; and 0<n.ltoreq.4.

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