of solution b in example b1 was changed to u03b3 methacryloxypropyltrimethoxysilane 19 2 g methanol 51 g 2 2 39 azobis 2 4 dimethylvaleronitrile 0 10 g and tetraethoxysilane dimers pentamers tamakagaku kk tama chemical co 34 silicate 40 34 40 wt as sio 2 4 2 g the resulting composite particles 2 had a mean particle diameter of 2 02 u03bcm with a coefficient of variation of 7 4 in particle diameter the quantity of sio 2 which constitutes the polysiloxane framework was 42 7 wt the elastic modulus in 10 compression was 720 kg mm 2 residual displacement after 10 deformation 3 6 and fracture strength 1 0 g as in example b1 a spectrum 650 800 cm 1 attributable to ch 2 ch 2 and a spectrum 1150 1300 cm 1 attributable to si ch 2 were confirmed in composite particles 2 when a b5 size ferroelectric liquid crystal display was made by the known method using these composite particles 2 the results obtained were as in example b1 composite particles 3 were obtained by repeating the procedure of example b1 except that the composition of solution b in example b1 was changed to u03b3 methacryloxypropyltrimethoxysilane 40 5 g methanol 50 6 g 2 2 39 azobis 4 methoxy 2 4 dimethylvaleronitrile 0 20 g and divinylbenzene 4 5 g and radical polymerization was performed during hydrolyzing and condensing by holding solution a at 50 u00b0 u00b1 5 u00b0 c and stirring in an atmosphere of nitrogen while solution b was added dropwise over.