Blowing agents comprising
alcohol amine salts and their use in
polyurethane continuous board foam materials. A
polyurethane foaming agent comprising primary amine salts and
alcohol amine salts is disclosed, the
foaming agent comprising: 1) a first compound mixture (M1) comprising organic primary amine salt compounds having the following general formula (I) : A ‑ [B + ] p (I), where B + is the cation of a +1-valent organic primary amine B, A ‑ Yes: CO 3 2‑ , HCO 3 ‑ , or CO 3 2‑ with HCO 3 ‑ 2) comprising N-monohydroxypropyl / monohydroxyethyl-
ammonium carbonate compound with general formula (II) and N,N'-bis(hydroxypropyl / hydroxyethyl) with general formula (II) base)-
ammonium carbonate compound of the second compound mixture (M2): (RN + h 3 )(N + h 4 )CO 3 2‑ (II), or (RN + h 3 ) 2 CO 3 2‑ (III), in the formula, R is the combination of hydroxypropyl and hydroxyethyl; the
molar ratio of the monoalcohol amine compound of the general formula (II) and the
diol amine compound of the general formula (III) is 1:0 to 1 :2.5. Blowing agents are suitable for use in the preparation of
polyurethane continuous board foam materials.