09-04-2014 дата публикации
Номер: CN103709569A
Принадлежит:
The invention provides photochromic polyvinyl butyral (PVB) resin and a preparation method thereof. The photochromic PVB resin consists of the following components in parts by weight: 90-95 parts of PVB powder, 0.05-0.3 part of photochromic raw powder and 5-10 parts of auxiliaries. The preparation method specifically comprises the steps of adding the photochromic raw powder to the PVB powder according to weight parts, adding the auxiliaries, uniformly mixing, adding to a film producing machine, controlling a certain temperature (at about 180-200 DEG C), pulling out a film, replacing the film in the film producing machine, repeatedly pulling and placing for 5-6 times and observing whether film and color are uniform, if so, pulling out the film, and drying at room temperature. The photochromic PVB resin disclosed by the invention has the beneficial effects that the photochromic PVB resin, which adopts a way of directly adding the photochromic raw powder to the PVB powder, can produce a photochromic ...
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