Novel Rheology Control Agents

摘要

The automotive coatings industry continues to search for technologies that will provide the optimum balance between cost effectiveness and performance Although various rheology control agents (RCAs) are well known to automotive coatings formulators, achieving the required balance of ease of incorporation, sag resistance, leveling, and stability that the automotive industry demands remains a challenge. This article presents the structure-property relationships of a new class of RCAs that function via a controlled flocculation mechanism. Such physical characteristics of the RCAs as particle size and rheology profile will be related to such performance properties as degree of sag and leveling and ease of incorporation. Using a IK high-bake coatings system, the proper techniques required to maximize the beneficial contributions of RCAs will be illustrated. The beneficial features of the new RCAs are higher solids, an additive nature, and high efficiency for sag resistance Their incorporation results in automotive coatings suitable for the global market that possess good robustness, lower VOCs, and ease of both manufacturing and application.