PMMA, additives Release agents

Yamamoto and Minamizaki [159] disclose the use of a curable silicone based release agent blended with resin particles which swell or are soluble in organic solvent. Coatings made with such blends can be written on with solvent based inks. For example, an addition cure silicone network containing 20 wt% 0.1 p,m diameter PMMA particles exhibited both good writeability (no ink dewetting and smear free) and a low release force of 10 g/cm for a PSA tape. 

For polymeric nanomaterials, another source of toxicity comes from unreacted monomers, residual reaction agents (e.g., aoss-linking initiators), or additives (e.g., surfactants) in the fabrication processes [21]. These substances may leach out and release to tissue when the nanopolymers or nanocomposites interact with body fluids or degrade. For instance, monomers of A-isopropylacrylamide and methyl methacrylate that forms PNlPAAm and poly(methyl methacrylate) (PMMA), respectively, are toxic and carcinogenic or teratogenic. As a result, medical products based on PNlPAAm and PMMA always require careful control of fabrication parameters and processes to minimize the umeacted monomers or residues [22]. 

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