Compositions – Preservative agents – Anti-corrosion
Patent
1985-03-26
1987-06-02
Terapane, John F.
Compositions
Preservative agents
Anti-corrosion
524424, 524211, 252356, 252405, B01J 1300, C09K 1516
Patent
active
046701842
ABSTRACT:
The invention relates to a suspension of ammonium carbonate and/or ammonium hydrogen carbonate in an aqueous solution saturated with respect to said salts and optionally also containing urea. For the purpose of stabilizing the suspension there is incorporated therein a polyacrylic acid having an average molecular weight (M.sub.w) in the range of 4.times.10.sup.5 -1.times.10.sup.6, preferably about 7.5.times.10.sup.5. The invention also relates to the use of the suspension for treating carbamide-resin bound, wood-based board material, such as plywood, chipboard and wood fibreboard, for reducing the emission of formaldehyde therefrom.
REFERENCES:
patent: 3758464 (1973-09-01), Prindle et al.
patent: 3912548 (1975-10-01), Falgen
patent: 4044007 (1977-08-01), Howard
patent: 4162045 (1979-07-01), Katzer et al.
patent: 4175975 (1979-07-01), MacWilliams et al.
Ullmans Encyklopadie der technischen Chemie, vol. 19, pp. 1-7 (1980).
Chemical Abstracts 85:335G8z, Preparation and Study of a Polyelectrolyte from Acrylic Acid and Ammonium Carbonate, Artykov et al, VINITI 6488-73, 9 pages, (Russ) (1976).
Bjorlin Anders
Edberg Thomas
Sjoblom Eva
Westling Anders
Swedspan AB
Terapane John F.
Wolffe Susan
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