PVB FILM WITH HIGH UV PROTECTION AND LOW YELLOWNESS INDEX FOR LAMINATED SAFETY GLAZINGS

The invention relates to a plasticizer-containing polyvinyl acetal film which has a transmission of less than 20% and a yellowness index db of less than 3 at 400 nm, containing at least one UV absorber of formula where R1 is H or halogen and R2 and R3 are C1-20 alkyl-, hydroxyalkyl-, alkoxyalkyl-, a...

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Bibliographic Details
Main Authors KELLER UWE, LELLIG PHILLIPP
Format Patent
LanguageEnglish
Published 24.04.2014
Subjects
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
CHEMISTRY
COMPOSITIONS BASED THEREON
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Summary:The invention relates to a plasticizer-containing polyvinyl acetal film which has a transmission of less than 20% and a yellowness index db of less than 3 at 400 nm, containing at least one UV absorber of formula where R1 is H or halogen and R2 and R3 are C1-20 alkyl-, hydroxyalkyl-, alkoxyalkyl-, acyloxyalkyl groups, optionally substituted by aldehyde, keto or epoxide groups, and an antioxidant of formula where R is hydrocarbon residue of a polyfunctional alcohol, an oligoglycol with 1 to 10 glycol units, or a hydrocarbon group with 1 to 20 carbon atoms, and s=1, 2, 3 or 4.
Bibliography:Application Number: US201314054925