| 摘要 |
<p>An aqueous contact cement, which comprise a dispersion in water of a chloroprene polymer and a resinous polyelectrolyte of an ionizable resinous mixture which is ionized with a volatile ionizing agent, and ionizable resinous mixture being the reaction product of a rosin, a carboxylic acid, and a C1-C18 mono-alcohol, the ionizable resinous mixture having a softening point not above 125 DEG C and an acid number of between 30 and 150, the reaction product comprising the carbocyclic nucleus of rosin having at least one carboxylic acid group and at least one carboxylic acid ester group of mono-alcohol, characterised in that the chloroprene polymer is a copolymer of 2-chloro-1,3-butadiene and methacrylic acid.</p> |
