Acrylic multilayer polymer powder

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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525366, 525902, 528486, 528488, 528502C, 521 66, 521149, C08J 316

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active

055212522

ABSTRACT:
Acrylic multilayer polymer powders containing coagulated powders of emulsified latexes of acrylic multilayer polymers, which are suitable for drying methods using pressure dehydration extruders, etc, comprises not more than 40 wt % of a fine powder of a particle size of 212 .mu.m or less after drying, and have a volume of gaps of a pore size of 5 .mu.m or less after drying of not more than 0.7 cc per unit weight as measured by a mercurial pressure method. A desired monomer is subjected to emulsion polymerization to produce an emulsified latex of an acrylic multilayer polymer, which is then poured into a coagulating solution for coagulation.

REFERENCES:
patent: 3843753 (1974-10-01), Owens
patent: 4730023 (1988-03-01), Sato et al.
patent: 5312575 (1994-04-01), Wills
E. W. Washburn, (1921) Proc. Nat. Acad. SCI, USA, 7, 715-6.
"Mercury Pressure Porosimetry," product data sheet of Carlo Erba Strumentazione.

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