| abstract |
A water soluble water absorption preventing agent mainly comprising an organic silicon compound and/or its partial hydrolytic condensate, represented by the following general formula: <IMAGE> wherein R1 denotes an alkyl group with 1-20 carbon atoms and with a linear chain or branched chain for which a halogen can substitute for part or all of the hydrogen atoms, R2 denotes a hydrogen atom or an alkyl group with 1-10 carbon atoms and with a linear chain or branched chain, R3 denotes a hydrogen atom or an alkyl group with 1-8 carbon atoms and with a linear chain or branched chain, m denotes an integer 1-2 and n denotes an integer 1-3 where m+n=3 or 4, p denotes an integer 1-50, and q denotes an integer 0-25. |