Processes for modifying the surface chemistry of a clay are disclosed. In one embodiment, there is provided a process for modifying the surface chemistry of a clay, wherein the process comprises: providing a clay dispersion comprising at least one unmodified clay wherein said clay has a first exchangeable cation; adding a second cation to the clay dispersion, wherein at least a portion of the second cation exchanges with at least a portion of the first cation to form a modified clay dispersion; and combining at least one polar containing agent with the modified clay dispersion to provide a modified clay.
Kaibo Li - Shanghai, CN Zhaohui Qu - Shanghai, CN Robert V. Slone - Ambler PA, US Huixian Yang - Shanghai, CN
International Classification:
C09J 133/08 C09J 125/06
US Classification:
524460
Abstract:
A microdomained aqueous emulsion polymer is provided. The polymer comprises a first domain having a Tg of from −80 to −10 C. and comprising from 80 to 100 wt % of acrylic monomer; and a non-crosslinked second domain having a Tg of from 50 to 120 C. and comprising, as polymerized unit and based on the weight of the second domain, from 50 to 100 wt % of styrenic monomer; wherein the content of the second domain ranges from greater than 6 wt % to 30 wt % of the total weight of the first domain and the second domain. The polymer is suitable for applications including adhesives and binders, especially for pressure sensitive adhesives.