prov:value
| - The matrix into which particles can be embedded during the extrusion process may consist, for example, of polymers such as polyvinylpyrrolidone or copolymers of vinylpyrrolidone with vinyl acetate, acrylic acid or acrylic esters, eg. methyl acrylate/ethyl acrylate copolymers, polyethylene, polyisobutylene, polyethylene glycols, polyethylene oxide, polyethylene glycol/propylene glycol copolymers, p
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