Patent ID: 8329849

Claim:
An organic silicon compound comprising: a first section represented by formula (I): where R 1 , R 2 and R 3 each independently represent an alkyl group having 1 to 3 carbon atoms, X represents a linking group, a represents 2 or 3, b represents 0, 1 or 2, c represents 2 or 3, and d represents 0 or a natural number, provided that a-b is 1 or more, one R 1 is directly bonded to a Si atom to which R 1 O is bonded when a is 2, and one R 2 is directly bonded to a Si atom to which R 2 O is bonded when c is 2; a second section comprising an alkoxyorganosiloxane structure portion comprising a unit represented by formula (IIa): where R 4 represents an alkyl group having one to four more carbon atoms than the number of carbon atoms of R 1 , R 2 and R 3 , and R 5 represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an aralkyl group having 7 to 10 carbon atoms, and when there are a plurality of each of R 4 and R 5 in one molecule, R 4 and R 5 may each be the same as or different from each other, the second section being bonded to the first section; and a third section represented by formula (III): —Y—R 8 (III) where R 8 represents an organic molecular chain or an organic silicon molecular chain or a reactive functional group, and Y represents a linking group, the third section being bonded to the second section.