Claims
- 1. A method for decomposing a polymer containing a urethane linkage and/or urea linkage in the presence of a decomposing agent, comprising measuring an amount of evolved carbon dioxide and conducting a decomposing reaction until the total amount of evolved carbon dioxide reaches at least 60% of a maximum evolved carbon dioxideount to give a liquid decomposed material.
- 2. The method according to claim 1, wherein the amount of evolved carbon dioxide is measured by using a gas meter.
- 3. The method according to claim 1, wherein the amount of evolved carbon dioxide is measured by measuring the weight of an absorbent absorbing the evolved carbon dioxide.
- 4. The method according to claim 1, wherein the decomposing agent is an alcohol or amine.
- 5. The method according to claim 1, wherein the amount of the decomposing agent is from 10 to 300 parts by weight per 100 parts by weight of the polymer containing the urethane linkage and/or urea linkage.
- 6. The method according to claim 1, wherein the decomposition reaction is conducted at a temperature of from 100 to 300.degree. C.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6-324528 |
Dec 1994 |
JPX |
|
Parent Case Info
this application is a 371 of PCT/JP95/02647, filed Dec. 25, 1995.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/JP95/02647 |
12/25/1995 |
|
|
8/20/1996 |
8/20/1996 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO96/20244 |
7/4/1996 |
|
|
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3404103 |
Matsudaira et al. |
Oct 1968 |
|
4039568 |
Sakai et al. |
Aug 1977 |
|
4160749 |
Schneider et al. |
Jul 1979 |
|
4281197 |
Oblinger |
Jul 1981 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
537 579 |
Apr 1993 |
EPX |
Non-Patent Literature Citations (1)
Entry |
Database WPI GB: AN 83-46423k�19! & SU, A,940 035 (Kapapetyan O.O. ) Jul. 5, 1982 see abstract. |