Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1990-10-12
1992-10-20
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525902, 523201, 524460, C08F26502
Patent
active
051570840
ABSTRACT:
This invention relates to a process of making hollow polymer latex particles without the use of acid in the swellable polymer core; the latexes are useful as opacifying plastic pigments for various coatings and particularly as gloss-enhancing plastic pigments for paper and paperboard coatings. Known methods for preparing hollow latexes require cores containing acid or acidic monomers to enable swelling to core at room temperature. The existence of acid in the polymer disadvantageously increases the polymer's affinity to water. Applicants have discovered that non-carboxylated latexes having a variety of T.sub.g 's will also swell at higher temperatures. The mechanism entails the use of acrylate and methacrylate ester monomers which are hydrolyzable and swellable at higher temperatures in alkaline environments. Such mechanisms for making swollen latexes provide for a wide variety of potential end-uses as well as a wide variety of potential latexes.
REFERENCES:
patent: 3426101 (1969-02-01), Ryan et al.
patent: 4427836 (1984-01-01), Kowalski
patent: 4468498 (1984-08-01), Kowalski
patent: 4469825 (1984-09-01), Kowalski
patent: 4594363 (1986-06-01), Blankenship
patent: 4880842 (1989-11-01), Kowalski
Journal of Applied Polymer Science, vol. 10, pp. 713-729, "Some Physicochemical Properties of Poly(ethyl Acrylate) Emulsions Containing Carboxyl Groups", 1966.
Journal of Applied Polymer Science, vol. 14, pp. 897-909, "Mechanism of Alkali Thickening of Acid-Containing of Emulsion Polymers. I. Examination of Latexes by Means of Viscosity", 1970.
Journal of Applied Polymer Science, vol. 14, pp. 911-923, "Mechanism of Alkali-Thickening of Acid-Containing Emulsion Polymers. II. Examination of Latexes with the Light Microscope", 1970.
Journal of Applied Polymer Science, vol. 11, pp. 1963-1978, "Alkali Solubility of Carboxylated Polymer Emulsions", 1967.
Leadbetter Arthur N.
Lee Do I.
Mulders Michael R.
Nicholson Dwayne J.
Johnson Rachel
The Dow Chemical Company
Welsh Maurice J.
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