Plasticizer-containing films of partially acetalized polyvinyl alcohols
AssigneeDynamit Nobel Aktiengesellschaft
InventorsRolf Beckmann, Wilhelm Knackstedt
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Abstract
A plasticizer-containing film of a partially acetalized polyvinyl alcohol resin contains as the plasticizer a mixture of an ester of an organic cyclic acid and/or a conventional acetal plasticizer for said resin, and an ester of an oxygen acid of phosphorus.
Claims9
A composite safety glass product which comprises a sheet of transparent silicate glass adhesively bonded to a sheet of material comprising a transparent silicate glass or a transparent synthetic resin, said sheets being bonded by a film of a partially butyralized polyvinyl alcohol resin having a hydroxy group content of 5-30% by weight calculated as the polyvinyl alcohol, and containing as a plasticizer
- (a) an ester of an organic cyclic acid selected from the group consisting of di(2-ethylhexyl)phthalate, diisodecylphthalate, a phthalate of a mixture of aliphatic alcohols of 7-13 carbon atoms, benzylbutyl phthalate, dipropylene glycol dibenzoate and butyl phthalylbutyl glycolate, and
- (b) an ester of an oxygen acid of phosphorus selected from the group consisting of tri(2-ethylhexyl)phosphate, tributyoxyethyl phosphate, 2-ethylhexyldiphenyl phosphate and decyldiphenyl phosphate, and said film containing the plasticizer in amounts of 20-85% by weight, based on the total weight of the film.
Dependencies are inferred from the claim text.