Stable emulsion polymers and methods of preparing same

Details Stable emulsion polymers and methods of preparing same Stable emulsion polymers and methods of preparing same

1988-04-21

1990-01-16

Foelak, Morton

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

Synthetic resins

Processes of preparing a desired or intentional composition...

428137, 525308, C08F 900, C08F26504, C08G 900, B32B 310

Patent

active

048943975

ABSTRACT:
An improved process for pruducing stabilized, core-shell latex emulsions is disclosed. In a process which comprises preparing a hydrophilic polymer and contacting the hydrophilic polymer with a hydrophobic monomer for producing an inverted core-shell latex emulsion, the improvement comprises the additional step of adjusting the pH of the inverted core-shell latex emulsion to dissolve the hydrophilic polymer, thereby to produce a stabilized, core-shell latex emulsion.

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Lee and Ishikawa, "The Formation of `Inverted` Core-Shell Latexes," J. Poly. Sci., 21, pp. 147-154, (1983).
Journal of Applied Polymer Science Article: "Morphology of Latex Particles Formed by Poly(methyl Methacrylate)-Seeded Emulsion Polymerization of Styrene", from vol. 30, pp. 1903-1926 of J.A.P.S.; see also Synopsis, p. 1903, first sentence, by Cho et al.
J.A.P.S. Article: "Preparation of Carboxylated Polymer Emulsion Particles in Which Carboxyl Groups are Predominantly Localized at Surface Layer by Using Seeded Emulsion Polymerization Technique", by Masayoshi et al., Synopsis, p. 1.
S. Muroi Article: "Internal Structure of Latex Particles Formed by [Two]-Stage Feed Polymerization of Ethyl Acrylate-Methacrylate Acid Mixture", p. 1, 2nd para.
Polymer Article: "Properties and Structure of Elastomeric Two-Stage Emulsion Interpenetrating Networks" by Narkis et al., see Abstract, pp. 1-2.
Colloque International sur la Copolymerisation et les Copolymeres en Emulsion, Mar. 1984, pp. 377-386, 387-390, and the English translation, titled: Emulsion Copolymerization, reprinted from Makromol. Chem., Suppl. 10/11, 359-390, (1985), pp. 24-31, See also "Bibliographie" of the English-language Translation.
Journal of Polymer Science: The Formation of `Inverted` Core-Shell Latexes, by D. L. Lee and T. Ishikawa, in the polymer Chemistry Edition, vol. 21, at pp. 147-154, published 1983.

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