| abstract |
What is disclosed is a latex, reactive with a biologically active substance to form a conjugate suitable for serological or immunological assay procedures, the particles of which latex comprises a polymer core and a shell thereover, said shell comprising a water insoluble monomer of the formula ##STR1## wherein R 2 is H or CH 3 , n is 1 to 6, and R 3 and R 4 are alkyl, aryl, or same other group imparting water insolubility to said monomer. |