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1. WO2020109270 - PHOSPHINE DERIVATIVES AS OXYGEN SCAVENGERS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

Claims

Claim 1. A compound which is the reaction product of at least a P

containing molecule and a Si containing molecule, wherein:

- said P containing molecule comprises at least one trivalent P atom and at least two P-H bonds on the same or on different trivalent P atoms,

- said Si containing molecule comprises at least one Si atom and at least two unsaturations selected from the group consisting of double carbon- carbon bonds, triple carbon-carbon bonds and triple carbon-nitrogen bonds, with the provision that double carbon-carbon bonds are counted as one unsaturation and triple carbon-carbon and carbon-nitrogen bonds are counted as two unsaturations.

Claim 2. A compound according to claim 1 which is an oligomer or a polymer.

Claim 3. A compound according to claim 1 or 2 wherein said P containing molecule has at least 3 of said P-H bonds and/or wherein said Si containing molecule has at least 3 of said unsaturations.

Claim 4. A compound according to claim 3 which forms a networked polymer.

Claim 5. A compound according to any preceding claim wherein said P

containing molecule is selected from phosphine (PH3), and organophosphorus compounds.

Claim 6. A compound according to claim 5 wherein said P containing

molecule is selected from PH3, primary phosphines and secondary phosphines

Claim 7 A compound according to any preceding claim wherein said P

containing molecule has at least 1 mole of trivalent P every 160 grams of molecule.

Claim 8. A compound according to any preceding claim wherein said Si containing molecule has at least 1 mole of unsaturations in every 100 grams of molecule.

Claim 9. A compound according to any preceding claim wherein the molar ratio between trivalent P and Si is in the range of 0.5 to 2, preferably of 0.9 to 1.1.

Claim 10. A compound according to any preceding claim wherein said Si

containing molecule is preferably selected from silanes or polysiloxanes

Claim 11. A compound according to claim 10 wherein said Si containing

molecule is is a polysiloxane oligomer with 2-20 Si atoms, more preferably a cyclic or polyciclic oligomer, even more preferably 2,4,6,8-tetramethyl-2,4,6,8- tetravinylcyclotetrasiloxane.

Claim 12. A method for making a compound according to any preceding claim said method comprising the steps of:

i) dissolving said Si containing molecule and said P containing molecule in an organic solvent, preferably selected from toluene, dicloromethane and THF, ii) providing a radical initiator, preferably UV light or azobisisobutyronitrile (AIBN).

Claim 13. A method of processing a polymer in melted form said method

including adding to the polymer a compound according to claims 1-11 in order to reduce oxidative degradation of said polymer.

Claim 14. A method of preventing oxidative degradation of a material including packaging said material within an enclosed space, said enclosed space also containing a compound according to claims 1-11.

Claim 15. Use of a compound according to claim 1-11 as oxygen scavenger.