Table 2. Specific Recipe of the Thermally Expandable Microspheres (phm)

Materials	A (r 0.75)	A (r 1.0)	A (r 1.25)	A (r 1.5)
AN	80	80	80	80
MAN	20	20	20	20
Iso-Pentane	15	15	15	15
Cross-linking Agent	0.75	1.0	1.25	1.5
Initiator	1.0	1.0	1.0	1.0
Colloidal Silica	20	20	20	20
Water	300	300	300	300