Organic amine salt foamer

A composite foaming agent, comprising:

• 1) hexafluorobutene;
• and
• 2) an alkanolamine salt mixture (MAA),
• wherein the alkanolamine salt mixture (MAA) comprises organic alkanolamine salt compounds, and the organic alkanolamine salt compounds is an organic alkanolamine salt compound having following general formula (I):
• An−[Bm+]p (I)
• in the above formula, An− is CO32−;
• wherein n=2, m=1, and p=2;
• Bm+ comprises:
• one or more organic amine (B) cation(s) having one —+NR3R4H group;
• wherein, R3 and R4 is independently chosen from:
• H, or R;
• provided that:
• the compound of the general formula (I) has at least one R group(s) linked to N atom, and the alkanolamine salt mixture (MAA) contain(s) 50-99 wt % of monoalkanolamine salt or dialkanolamine salt, based on total weight of the alkanolamine salt mixture (MAA);
• wherein the R group is H[OCH(R1a)CH(R2a)]—;
• wherein R1a, R2a each independently is selected from the following groups:
• H, C1-C7 aliphatic hydrocarbyl group optionally substituted by hydroxyl or amino or halogen, and C3-C7 cycloaliphatic hydrocarbyl group optionally substituted by hydroxyl or amino or halogen;
• wherein water content in the alkanolamine salt mixture (MAA) is from more than 0 wt % to 40 wt %, and said one or more organic amine cation(s) (B) is/are organic amine cation(s) having 2-20 carbon atoms;
• wherein the weight ratio of hexafluorobutene to alkanolamine salt mixture (MAA) in the composite foaming agent is 0.4-5:1.