| abstract |
The invention relates to a process for preparing a foamed polymeric article, comprising heating a polymeric composition, said composition comprising a thermoplastic polyolefin elastomer, a first blowing agent in the form of a water releasing chemical compound, and a second, different blowing agent, to a temperature at which the first blowing agent releases water, to foam said thermoplastic polyolefin elastomer, said temperature being above the melting point of the thermoplastic polyolefin elastomer, characterized in that said first blowing agent comprises a metal hydroxide, a metal salt of Group 1 or 2 of the Periodic Table containing hydrate water and mixtures thereof and said second blowing agent not being a metal hydroxide or a Group 1 or 2 of the Period Table metal salt containing hydrate water. The invention also relates to a foamable polymeric composition as well as to a foamed thermoplastic elastomeric article. |