Patent ID: 6294230
Filing Date: 2001-09-25
Classification: C09K,G02F,Y10T

Abstract:
Spherical laminated particles each comprising a core particle and a laminate part disposed on a surface of the core particle,wherein the laminate part has a compressive modulus which is smaller than that of the core particle,the compressive modulus of the core particles is in the range of 200 to 6000 kg/mm.sup.2,the compressive modulus of the spherical laminated particles or the compressive modulus of the laminated parts is in the range of 50 to 1000 kg/mm.sup.2, andthe laminate part is composed of a hydrolyzate of one member or a mixture of at least two members selected from among compounds represented by the following formulae (II) to (IV): ##STR3##wherein R.sup.2 represents a substituted or unsubstituted group having 1 to 10 carbon atoms; R.sup.3 represents a hydrogen atom or an organic group having 1 to 10 carbon atoms selected from the group consisting of alkyl, alkoxyalkyl and acyl groups; each of R.sup.4 and R.sup.5 represents a group having 1 to 10 carbon atoms selected from among substituted or unsubstituted hydrocarbon groups; R.sup.6 represents a hydrogen atom or an organic group having 1 to 10 carbon atoms selected from among alkyl, alkoxyalkyl and acyl groups; R.sup.7 represents a propyl group or a butyl group; Y represents an organic group selected from among methyl, methoxy and ethoxy groups, M represents an element selected from among those of the Groups 2 to 15 of the Periodic Table; and m is an integer of 1 to 4 provided that m+n is an integer of 2 to 4.