Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1996-03-01
1998-04-07
Morgan, Kriellion S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524403, 524413, 424618, 424630, 424649, C08K 310, A01N 5916, A01N 5920
Patent
active
057365911
ABSTRACT:
The growth of bacteria in latex is an age old problem. To control the growth of bacteria in latex, chemical bactericides are often added to latex. This invention discloses a technique for providing latex with resistance to bacterial growth. It is based upon the discovery that ions of a metal from Group Ib of the Periodic Chart, such as copper, silver, or gold, will provide latex with resistance to bacterial growth. The subject invention more specifically discloses a latex which is comprised of (1) a polymer, (2) water, (3) an emulsifier and (4) ions of a metal from Group Ib of the Periodic Chart. In most cases, the metal ions will be present in an amount which is within the range of about 1 ppm to about 50 ppm. As a general rule, silver ions are preferred. By utilizing a combination of standard organic chemical bactericides and Group Ib metal ions, the level of chemical bactericides and metal ions needed to satisfactorily control bacteria growth can be significantly reduced. Such a combination of chemical bactericides and Group Ib metal ions accordingly offers excellent cost advantages and provides treated latex with a high degree of protection against bacterial growth. The present invention further reveals a latex which is comprised of (1) a polymer, (2) water, (3) an emulsifier, (4) ions of a metal from Group Ib of the Periodic Chart and (5) an organic chemical bactericide.
REFERENCES:
patent: 4291125 (1981-09-01), Greatbatch
patent: 4442095 (1984-04-01), Johnston
patent: 4481202 (1984-11-01), Johnston
patent: 4507299 (1985-03-01), Johnston
patent: 4512991 (1985-04-01), Johnston
Morgan Kriellion S.
Rockhill Alvin T.
The GoodYear Tire & Rubber Co.
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