Back to results
US 3,941,847 AGranted
Aldehyde functional polymers
AssigneeBridgestone Tire Company Limited
InventorsToshio Yukuta, Minoru Kojima, Akira Onishi, Shu Kanbara
Life of this patent
Estimating the term…
Abstract
Aldehyde functional polymers having a molecular weight of about 500 to 50,000 and containing aldehyde functional groups at both ends and/or on side chains of the molecule are produced by subjecting some of the double bonds in a high polymer containing olefinically unsaturated double bonds to ozone-decomposition by ozone-containing gas and reducing the ozone-decomposition products by means of a trivalent phosphorus compound as a reducing agent into substantially only aldehyde functional groups.
Claims3
Aldehyde functional polybutadiene having
- a. a molecular weight from 500 to 50,000;
- b. infrared absorption due to aldehyde functional groups at 1,730 cm.sup.-.sup.1 and 2,720 cm.sup.-.sup.1 ;
- c. proton absorption at 9.8 ppm in its nuclear magnetic resonance spectrum with tetramethylsilane as a standard in a 20% by weight solution in deuterochloroform;
- and
- containing substantially only aldehyde functional groups at chain terminals and/or on the side chains of the molecule.
2 more elements
Dependencies are inferred from the claim text.