Process for preparing poly(sulfonyl-phenylene)phenylphosphonate

• US 3,919,363 A
• Filed: 04/30/1974
• Issued: 11/11/1975
• Est. Priority Date: 04/30/1974
• Status: Expired due to Term

• Current Assignee: Gojyo Sakata, Hideki Takamatsu, Keiichi Kondo, Yasukazu Ura, Yoshiharu Mori
• Original Assignee: Gojyo Sakata, Hideki Takamatsu, Keiichi Kondo, Yasukazu Ura, Yoshiharu Mori
• Inventors: Ura, Yasukazu, Sakata, Gojyo, Takamatsu, Hideki, Mori, Yoshiharu, Kondo, Keiichi
• Primary Examiner(s): Sutto, Anton H.
• Application Number:
  US05/465,525
• Time in Patent Office: 560 Days
• Field of Search: 260/929,973
• US Class Current: 558/99
• CPC Class Codes: C07F 9/4084 Esters with hydroxyaryl compounds
• CPC Class Codes: C08G 79/04 Phosphorus linked to oxygen or to oxygen and carbon
• CPC Class Codes: C08J 2385/02 containing phosphorus
• CPC Class Codes: C08J 3/14 by precipitation from solutions C08J3/122 takes precedence

Abstract

Poly(sulfonyldiphenylene)phenylphosphonate is prepared in solution by polycondensing dihydroxy-diphenylsulfone and phenylphosphonic dichloride in tetrachloroethane. The viscosity of the resulting solution is decreased by adding 0.1 to 25% of methanol and the polymer may be precipitated from solution by adding said solution to a methanol bath.

Claims

1. A PROCESS FOR PREPARING POLY(SULFONYLDIPHENYLENE)PHENYLPHOSPHONATE WHICH COMPRISES POLYCONDENSING DIHYDROXYDIPHENYLSULFONE AND PHENYLPHOSPHONICC DICHLORIDE IN TETRACHLOROETHANE, DECREASING THEVISCOSITY OF THE RESULTING SOLUTION BY ADDNG 0.1 -2.5% OF METHANOL BASED ON TOTAL SOLVENT AND ADDING THE SOLUTION TO A METHANOL BATH TO PRECIPITATE POLY(SULFONYLDIPHENYLENE)PHENYLPHOSPHONATE.

2. The process of claim 1, wherein the water content of the dihydroxydiphenylsulfone is decreased to less than 1 mole % by azeotropic distillation of the mixture of dihydroxydiphenylsulfone and tetrachloroethane, before the polycondensation.

3. The process of claim 1, wherein the solution of poly(sulfonyldiphenylene)phenylphosphonate in tetrachloroethane is added gradually to methanol under conditions of the stabe dispersing zone shown in FIG. 1.

4. The process of claim 1, wherein said polycondensation is effected in contact with a catalyst of magnesium chloride or calcium chloride.

5. The process of claim 1, wherein the molar ratio of phenylphosphonic dichloride to dihydroxydiphenylsulfone in the polycondensation is 0.9 to 1.1, preferably 0.99 to 1.01.

6. The process of claim 1, wherein the weight ratio of tetrachloroethane to the resulting poly(sulfonyldiphenylene)phenylphosphonate in the polycondensation is more than 2.

7. The process of claim 1, wherein the said polycondensation is carried out at the reflux temperature of tetrachloroethane.

8. The process of claim 1, wherein the degree of polymerization of the poly(sulfonyldiphenylene)phenylphosphonate is more than 6.