Vesiculated polymer beads

Details Vesiculated polymer beads Vesiculated polymer beads

1994-04-25

1995-11-28

Lipman, Bernard

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

Synthetic resins

Cellular products or processes of preparing a cellular...

525 27, 525 45, 525 47, 525 48, 525 49, 525387, 526228, 5262305, C08F 800

Patent

active

054708877

ABSTRACT:
Vesiculated polymer beads are prepared in which a water-in-oil-in-water emulsion containing a cross-linkable polymer and a copolymerizable monomer in the oil phase is heated in the presence of an initiator to cure the polymer beads, wherein curing is commenced in a first stage in the presence of a substantially water-insoluble initiator and, when the beads are sufficiently stable, curing is completed in a second stage in the presence of an at least partially water-soluble initiator. Preferably, the completion of curing is carried out at a temperature higher than that of the first stage. The beads can be used in low odor paint formulations.

REFERENCES:
patent: 4314033 (1982-02-01), Gillan et al.
patent: 4321332 (1982-03-01), Beresford et al.
patent: 4808633 (1989-02-01), Ferguson et al.

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