Reducing formaldehyde emissions in formal-containing compositions
Method for reducing the formaldehyde emission of a composition containing a formal by adding urea, urea derivatives, amino acids, guanidine or guanidine derivatives.
1. A method of reducing the formaldehyde emissions of a composition comprising a formal, comprising:
adding at least one component to a composition comprising at least one formal, wherein the at least one component is selected from the group consisting of: urea, urea derivatives, amino acids, guanidine and guanidine derivatives and wherein the at least one formal is selected from the group consisting of an N-formal, an O-formal and a combination thereof.
2. The method according to claim 1 , wherein the at least one component is a urea derivative and the urea derivative is selected from the group consisting of: glycoluril, tetramethylolglycoluril, dimethylhydantoin, dimethyloldimethylhydantoin, dimethylolurea, tetramethanolurea, imidazolidinylurea, and diazolidinylurea.
3. The method according to claim 1 , wherein the at least one formal is an O-formal selected from the group consisting of dimethanol, benzyl alcohol hemiformal, propylene glycol hemiformal, and butyl diglycol hemiformal.
4. The method according to claim 1 , wherein the at least one formal is an N-formal selected from the group consisting of:
N,N′,N″-tris(hydroxyethyl)hexahydrotriazine,
N,N′,N″-trisβ-hydroxypropyl)hexahydrotriazine, and
N,N′-methylenebis(5-methyloxazolidine).
5. The method according to claim 1 , wherein the at least one component is added to the composition in an amount so that the weight ratio of said at least one formal to said at least one component is 500:1 to 1:1.
6. The method according to claim 4 , wherein the weight ratio of said at least one formal to said at least one component is 200:1 to 5:1.