C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
403/72, 403/80
C08J 9/18 (2006.01) C08J 9/224 (2006.01) C08L 89/04 (2006.01)
Patent
CA 1078999
ANTI-LUMPING COATING FOR POLYSTYRENE BEADS ABSTRACT OF DISCLOSURE A complex is formed by the reaction of an aluminum salt such as aluminum sulfate with a high molecular weight (for example, above 60,000 M.W.) collagen. Collagen- aluminum complex is dispersed in water and serves as suspen- sion agent for suspending polystyrene beads during impre- nation of a blowing agent, even when the concentration of the suspending agent is of the magnitude of 0.05% by weight of the beads. The aqueous system is drained from impregnated expandable beads, which are washed, but which retain adherent deposits of said collagen-aluminum complex in measurable amounts. The dried coated beads have mini- mized propensity toward lumping when pre-expanded. The prepuffed particles can pass tests concerned with resist- ance toward static electrical phenonomen better than corresponding prepuffed particles lacking such deposit of collagen-aluminum complex. 1.
269721
Arco Polymers
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