Liquid tackifiers are low-molecular-weight resins or additives used to increase stickiness, adhesion, and cohesion in adhesives, sealants, coatings, and rubber compounds. They are crucial for formulating pressure-sensitive adhesives (PSAs), hot-melt adhesives, and lubricants (greases) to prevent dripping or flinging. Common forms include rosin esters and hydrocarbon resins used in industrial, automotive, and specialized applications.
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