Solid gel dispensers for achieving controlled release of volatil

Details Solid gel dispensers for achieving controlled release of volatil Solid gel dispensers for achieving controlled release of volatil

1989-04-13

1989-12-19

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521141, 521134, C08J 928

Patent

active

048883646

ABSTRACT:
Aesthetically attractive, free standing dispensers for the controlled release of volatile liquid materials such as perfumes and fragrances into the atmosphere consist essentially of composite hydrogels comprising a continuous phase of a solubilized polyvinyl alcohol, a dispersed phase comprising a polyelectrolyte and an aqueous solution of the volatile liquid that is distributed between said continuous and dispersed phases. The exterior surfaces of the dispenser remain dry to the touch throughout its useful life.

REFERENCES:
patent: 4094119 (1978-11-01), Sullivan
patent: 4117110 (1978-11-01), Horst
patent: 4356969 (1982-03-01), Obermeyer et al.
patent: 4594380 (1986-08-01), Chapin et al.
patent: 4663358 (1987-05-01), Hyon et al.
patent: 4719040 (1988-09-01), Traas et al.
patent: 4720409 (1988-02-01), Spector

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