Ki Baek Kim

US Patent:

40395120, Aug 2, 1977

Filed:

Sep 15, 1975

Appl. No.:

5/613145

Inventors:

Ki Soo Kim - Irvington NY
Siegfried Altscher - Monsey NY

Assignee:

Stauffer Chemical Company - Westport CT

International Classification:

C08G 3310
C08G 3318

US Classification:

260 61

Abstract:

Flame retardant polymers of benzene phosphorus oxydichloride, 4,4'-thiodiphenol and POCl. sub. 3 are disclosed which are preferably formed by reacting these monomers in an inert organic solvent at ambient temperature in the presence of an amine acid acceptor.

US Patent:

42062969, Jun 3, 1980

Filed:

Sep 15, 1975

Appl. No.:

5/613142

Inventors:

Arthur J. Yu - Stamford CT
Siegfried Altscher - Monsey NY
Ki S. Kim - Irvington NY

Assignee:

Stauffer Chemical Company - Westport CT

International Classification:

C08L 6702
C08L 8100
C08L 8502

US Classification:

525437

Abstract:

Polyester compositions containing an effective amount for flame retardancy of a copolymer of (1) benzene phosphorus oxydichloride, (2) 2,4'-thiodiphenol, 4,4'-thiodiphenol, 2,4'-sulfonyl diphenol, 4,4'-sulfonyl diphenol or mixtures thereof, and (3) POCl. sub. 3 are disclosed.

US Patent:

40425428, Aug 16, 1977

Filed:

Sep 15, 1975

Appl. No.:

5/613143

Inventors:

Ki Soo Kim - Irvington NY

Assignee:

Stauffer Chemical Company - Westport CT

International Classification:

C08L 8900

US Classification:

260 6

Abstract:

The recovery of a polymer product formed by condensing an organo-phosphonic acid dichloride or dibromide, a dihydroxy aromatic compound and, optionally, a crosslinking momomer in an organic solvent reaction medium, as a granular solid is accomplished by combining said organic solvent containing the polymer product and an aqueous solution which contains an effective amount of suspending agent to later induce precipitation of said polymer product and by thereafter agitating the solution while removing the solvent therefrom to affect precipitation of said granular polymer product.