| 摘要 |
<p>Acrylic copolymers containing the following repeating units: <CHEM> wherein RA, RB, RC, RI, RII, equal or different, are H or CH3; M<+> is H or a cation belonging to group IA, IIA, or ammonium; n is an integer from 0 to 2; A0 is -COO-(RT0)m-RZ wherein RT is a saturated C2-C4 alkyl group, m is an integer from 7 to 50, RZ is H or a saturated C1-C4 alkyl group; RIII is H, COOH, COO<->M<+> wherein M<+> is as above defined or A0 as above defined; and optionally containing a third comonomer in a quantity 0-20% of the total monomer weight, said polymers, that contain in terminal position silanol groups, are obtainable by copolymerizing the monomers in the presence of the following chain transfer agents: (A) SH-Ro-Si(RIB)NB(ORIA)NA, wherein RIA is hydrogen or a saturated C1 - C3 alkyl, RIB is C1-C3 alkyl, NB is an integer and is 1 or zero, NA is an integer and is 2 or 3, Ro, is a linear or branched alkylenic chain from 1 to 20 carbon atoms, or a mixture of (A) with (B) phosphorous<I-III> inorganic acids or their salts. -</p> |
