Poli(vinil acetato)

El poli(vinil acetato) (PVAc) es un sólido inodoro, blanco o ligeramente amarillento, que normalmente se suministra en forma de polvo, dispersión acuosa o solución resinoso; se ablanda por encima de 28–40 °C (según el peso molecular y el contenido de plastificante) y se descompone antes de fundirse de forma neta. Es un polímero orgánico sintético obtenido mediante polimerización por radicales libres del monómero acetato de vinilo. El poli(vinil acetato) se emplea principalmente como aglutinante y agente formador de película en adhesivos a base de agua, pinturas arquitectónicas y recubrimientos para papel, y se utiliza ampliamente como precursor del poli(vinil alcohol) y de copolímeros de poli(vinil acetato-co-etileno). Sus principales áreas de aplicación incluyen adhesivos para la construcción, pinturas para interiores, engomado textil y laminados para embalajes.

As an emulsion in water, aPVAc emulsions are used as adhesives for porous materials, particularly for wood, paper, and cloth, and as a consolidant for porous building stone, in particular sandstone . Uses : As wood glue PVAc is known as "white glue" and the yellow "carpenter's glue" or PVA glue. As paper adhesive during paper packaging converting In bookbinding and book arts, due to its flexible strong bond and non-acidic nature (unlike many other polymers). The use of PVAC on the Archimedes Palimpsest during the 20th century greatly hindered the task of disbinding the book and preserving and imaging the pages in the early 21st century, in part because the glue was stronger than the parchment it held together.The stiff homopolymer PVAc, but mostly the more soft copolymer a combination of vinyl acetate and ethylene, vinyl acetate ethylene (VAE), is used also in paper coatings, paint and other industrial coatings, as binder in nonwovens in glass fibers. sanitary napkins, filter paper and in textile finishing PVAc can also be used as coating to protect cheese from fungi and humidity. Polyvinyl acetate is also the raw material to make other polymers like : Polyvinyl alcohol -[HOCHCH2]-: Polyvinyl acetate is partially or completely hydrolysed to give polyvinyl alcohol. This reversible saponification and esterification reaction was a strong hint for Hermann Staudinger in the formulation of his theory of macro molecules. Polyvinyl acetate phthalate (PVAP): Polyvinyl acetate is partially hydrolyzed and then esterified with phthalic acid.
Claro; gránulos

Este producto químico está incluido en Plásticos. Consulte más información sobre qué es Poli(vinil acetato) y la información SDS de Poli(vinil acetato).

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