Patents

S-W Patents Compatibilizer For Polymer Blends

August 10, 2005

Patent No. U.S. 6,541,571 B1
The Sherwin-Williams Company has been granted a patent for a process for compatibilizing at least two mutually incompatible polymers. The process comprises adding to at least one of the polymers an effective amount of a compatibilizing dispersant. The dispersant is the polymerization reaction product of a mixture of monomers consisting of approximately 10%-40% by weight styrene; 10%-55% by weight of at least one alkyl methacrylate monomer having one to eight carbon atoms in the alkyl group; and 10%-55% by weight of at least one alkyl methacrylate monomer having greater than eight carbon atoms in the alkyl group; five percent to 25% by weight of at least one alkyl acrylate monomer having from one to 18 carbon atoms in the alkyl group; and seven percent to 25% by weight of at least one hydroxy-functional ethylenically unsaturated monomer having a molecular weight of less than 2000; and 0.1% to 15% of a compound providing an amine functional moiety.