Process for the preparation of polycarbonate with weatherproof p

Details Process for the preparation of polycarbonate with weatherproof p Process for the preparation of polycarbonate with weatherproof p

1974-01-14

1979-05-08

Briggs, Sr., Wilbert J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528128, 528199, C08G 6362, C08L 6900

Patent

active

041537807

ABSTRACT:
A process is provided for preparing a polycarbonate composition with excellent weatherproof properties. The process comprises adding an ultraviolet absorbing compound having a hydroxy group which contributes at least partially to the molecular weight modifier to an oligomeric polycarbonate which is obtained by the reaction of a dioxy compound with phosgene, and then condensing said oligomeric polycarbonate to polymerize the same. The invention also concerns a process for preparing a polycarbonate with excellent weatherproof properties which process comprises introducing a dioxy compound in alkaline solution and an organic solvent for the polycarbonate into a tubular reactor continuously to form a turbulent flow, feeding phosgene concurrently to the reactor with cooling outside of the reactor to produce an oligomeric polycarbonate as the solution of organic solvent, adding an aqueous alkaline solution of dioxy compound, molecular weight modifier, which is contained at least in part ultraviolet absorbing compound having an hydroxy group, and catalyst selected from the group consisting of tertiary amine and quaternary ammonium salt and, if desired, antioxidant to said oligomeric polycarbonate solution and condensing said oligomeric polycarbonate to polymerize the same.

REFERENCES:
patent: 3322719 (1967-05-01), Peilstocker
patent: 3391110 (1968-07-01), Coleman
patent: 3518175 (1970-06-01), Bell
patent: 3660083 (1972-05-01), Bloom et al.
patent: 3697481 (1972-10-01), Bialous et al.
patent: 3787359 (1974-01-01), Horn et al.

Affiliated with

Also associated with

Rating

Process for the preparation of polycarbonate with weatherproof p does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of polycarbonate with weatherproof p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of polycarbonate with weatherproof p will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1234605