| 摘要 |
<p>1421930 Gelatine EASTMAN KODAK CO 29 March 1973 [29 March 1972] 15128/73 Heading C3H [Also in Division G2] The viscosity of a hydrophilic colloid such as gelatine is increased by incorporating a polymer having at least 50 mole per cent of units of the structure where R 1 is H or alkyl or 1-4 C, R 2 is alkylene 1-4 C, x is 0 or 1 and M is an ammonium, salt-forming amine or alkali-metal cation. In examples (7, 8),5% gelatine solutions are treated with a homopolymer of sodium methacryloyloxyethyl sulphate, a homopolymer of sodium 3- methacryloyloxypropane-1-sulphonate and a copolymer of 3-thiapentyl acrylate, sodium methacryloyloxyethyl sulphate and 2-acetoacetoxyethyl methacrylate.</p> |
