| 摘要 |
The invention provides a blowing agent composition comprising at least 55%wt of a C 5 alkane, and at least 0.5 %wt of a further alkane and/or an ether. The further alkane is a C 3 alkane, a C 4 alkane and/or a C 6 alkane, which does not comprise a haloalkane, and the ether has the formula R 1 OR 2 , wherein R 1 and R 2 are both independently a C 1 to C 3 alkyl group. |
