Aqueous ammoniacal zinc arsenic or zinc/copper arsenic wood pres

Details Aqueous ammoniacal zinc arsenic or zinc/copper arsenic wood pres Aqueous ammoniacal zinc arsenic or zinc/copper arsenic wood pres

1975-04-16

1977-07-26

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Contains fireproofing or biocidal agent

424133, 424140, 424145, 424166, 427440, C09D 514

Patent

active

040380866

ABSTRACT:
Aqueous ammoniacal wood treating compositions are provided which have a pH of 9 or more. The cations are zinc ammonium or copper ammonium and zinc ammonium ions. The anions include arsenic or arsenious ions, as well as further anions of carbonate and/or bicarbonate. The weight ratio of zinc or zinc and copper (as oxide) to arsenic (as oxide) is greater than 1.5. Preferably, the weight ratio of CO.sub.2 /NH.sub.3 /Zn/As or CO.sub.2 /NH.sub.3 /Zn+Cu/As is 1.7-2.3/5.9-6.7/1.9-2.9/.9. The compositions provide a treated wood product with increased leaching resistance of arsenic. Treating procedures and treated wood products are also provided.

REFERENCES:
patent: 1632508 (1927-06-01), Schantz
patent: 2194827 (1940-03-01), Gordon
patent: 2310257 (1943-02-01), Ritter
patent: 2414661 (1947-01-01), Nikitin

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