Tobacco-smoke filters

Details Tobacco-smoke filters Tobacco-smoke filters

1975-06-11

1977-07-05

Michell, Robert W.

Tobacco

Tobacco users' appliance

Supports

131 10R, A24D 106

Patent

active

040333612

ABSTRACT:
A tobacco-smoke filter contains, as adsorbent for volatile tobacco-smoke constituents, a macroporous amine-type anion-exchange resin which contains substantially primary amino groups only, for instance a cross-linked polyvinyl aromatic compound such as polystyrene cross-linked with divinyl benzene. Advantageously the resin is used in particulate form between fibrous, filamentary or paper filter sections or dispersed in tow. The resin may be half-neutralised with acetic acid or admixed with solid acid.

REFERENCES:
patent: 2800908 (1957-07-01), Blank et al.
patent: 3658069 (1972-04-01), Wise et al.

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