Interfacial processes for preparing photoactive additives
AssigneeSabic Innovative Plastics IP B.V.
InventorsJames Franklin Hoover, Derek LAKE
Life of this patent
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Abstract
Different interfacial processes for producing photoactive additives are disclosed. Generally, the photoactive additives are cross-linkable polycarbonate resins formed from a dihydroxybenzophenone, a first linker moiety, a diol chain extender, and an end-capping agent. The resulting additives can be crosslinked with other polymers upon exposure to UV radiation.
Claims41
A process for preparing a photoactive additive from a dihydroxybenzophenone, a diol chain extender, an end-capping agent, a carbonate precursor, a base, a tertiary amine catalyst, water, and a water-immiscible organic solvent, comprising:
- combining the dihydroxybenzophenone, diol chain extender, tertiary amine catalyst, water, and water-immiscible solvent to form a reaction mixture;
- adding the carbonate precursor to the reaction mixture over a first time period while co-adding the base to regulate the reaction pH;
- adding the end-capping agent to the reaction mixture for a second time period while continuing to add the carbonate precursor and the base;
- and
- continuing to add the carbonate precursor and the base to the reaction mixture for a third time period after addition of the end-capping agent is complete to obtain the photoactive additive.
A process for preparing a photoactive additive from a dihydroxybenzophenone, a diol chain extender, an end-capping agent, a carbonate precursor, a base, a tertiary amine catalyst, water, and a water-immiscible organic solvent, comprising:
- combining the dihydroxybenzophenone, diol chain extender, end-capping agent, tertiary amine catalyst, water, and water-immiscible solvent to form a reaction mixture;
- and
- adding the carbonate precursor to the reaction mixture while co-adding the base to regulate the reaction pH to obtain the photoactive additive.
A process for preparing a photoactive additive from a dihydroxybenzophenone, a diol chain extender, an end-capping agent, a carbonate precursor, a tertiary amine catalyst, water, and a water-immiscible organic solvent, comprising:
- combining the dihydroxybenzophenone, diol chain extender, water, and water-immiscible solvent to form a reaction mixture;
- adding the carbonate precursor to the reaction mixture to form chloroformate in the reaction mixture while co-adding the base to regulate the reaction pH;
- adding the end-capping agent to the reaction mixture and reacting the reaction mixture;
- and
- adding the tertiary amine catalyst to the reaction mixture and reacting the reaction mixture to obtain the photoactive additive.
A process for preparing a photoactive additive from a dihydroxybenzophenone, a diol chain extender, an end-capping agent, a carbonate precursor, a tertiary amine catalyst, water, and a water-immiscible organic solvent, comprising:
- pre-reacting the end-capping agent with the carbonate precursor in a tubular reactor to convert the end-capping agent into a monochloroformate;
- combining the dihydroxybenzophenone, diol chain extender, tertiary amine catalyst, water, and water-immiscible solvent in a reaction mixture;
- adding the carbonate precursor to the reaction mixture over a first time period;
- and
- adding the monochloroformate compound to the reaction mixture throughout the first time period while co-adding the base to regulate the reaction pH to obtain the photoactive additive.
Dependencies are inferred from the claim text.