Back to results
US 2026/0109795 A1Published application
High refractive index polyvinyl acetal resins modified with cyclic aldehydes
AssigneeEastman Chemical Company
InventorsJun Lu, Vinita Shinde, Wenjie Chen, John Joseph D'Errico, Bruce Edward Wade
Life of this patent
Estimating the term…
Abstract
A modified polyvinyl acetal resin comprising residues of a cyclic aldehyde is provided for use in forming interlayers for making laminated glass. Interlayers as described herein exhibit desirable optical and acoustic properties and are more easily recycled than those without the modified polyvinyl acetal resin.
Claims20
A polyvinyl acetal resin composition comprising:
- a polyvinyl acetal resin component comprising residues of at least one cyclic aldehyde having an unsaturated 5-member or 6-member ring group and another polyvinyl acetal resin component comprising residues of at least one C3 to C8 aliphatic aldehyde;
- and at least one plasticizer.
A method of making a polyvinyl acetal resin component, said method comprising at least one of the following steps (a) and (b):
- (a) acetalizing polyvinyl alcohol with at least one C3 to C8 aliphatic aldehyde and at least one cyclic aldehyde to form a modified polyvinyl acetal resin, wherein the cyclic aldehyde comprises (i) an unsaturated 5-member or 6-member ring and/or (ii) a heterocyclic ring;
- and/or
- (b) blending a polyvinyl acetal resin comprising residues of a cyclic aldehyde and/or a heterocyclic ring with another polyvinyl acetal resin comprising at least 50 weight percent of residues of a C3 to C8 aliphatic aldehyde to form a blended polyvinyl acetal resin composition.
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
Dependencies are inferred from the claim text.