Patent ID: 7547740

Claim:
A latex composition comprising a polymer blend of a first polymer and a second polymer, wherein: the first polymer is made from first constituent monomers, has a number average molecular weight greater than about 7,000 Daltons and less than about 40,000 Daltons and a polydispersity index of less than about 4.5, has a glass transition temperature from about −20° C. to about 60° C., and comprises a self-crosslinking monomer; the second polymer is made from second constituent monomers, has a number average molecular weight greater than about 80,000 Daltons, and has a glass transition temperature from about −20° C. to about 60° C.; the glass transition temperature of the second polymer is at least about 10° C. higher than the glass transition temperature of the first polymer; and the relative proportion of the first polymer to the second polymer is from about 1:4 to 4:3 by weight.