METHOD FOR PRODUCING ORGANIC ISOCYANATE POLYMERS

• US 3,609,149 A
• Filed: 09/10/1969
• Issued: 09/28/1971
• Est. Priority Date: 09/11/1968
• Status: Expired due to Term

• Current Assignee: Jugo Goto, Kiyoshi Yasuda, Yutaka Matsui
• Original Assignee: Jugo Goto, Kiyoshi Yasuda, Yutaka Matsui
• Inventors: Matsui, Yutaka, Yasuda, Kiyoshi, Goto, Jugo
• Primary Examiner(s): Ford, John M.
• Application Number:
  US04/856,833
• Time in Patent Office: 748 Days
• Field of Search: 260/248NS,77.5NC,77.5AC
• US Class Current: 544/193
• CPC Class Codes: C07D 251/34 Cyanuric or isocyanuric esters

Abstract

This invention relates to the production of isocyanate polymers. Xylylene omega , omega '"'"''"'"'-diisocyanate trimers are produced that are devoid of 1-nylon-type polymers. Xylylene omega , omega '"'"''"'"'diisocyanate is contacted with a trimerization catalyst and a 1nylon-formation suppressor selected from acid amides, acid imides, ureides, thioureides or mixtures thereof.

Claims

2. The method according to claim 1, wherein the amount of the trimerization catalyst is about 0.002 to 5.0 percent by weight relative to the xylylene omega , omega '"'"''"'"'-diisocyanate.

3. The method according to claim 1, wherein the amount of the 1-nylon-formation suppressor is about 0.01 to 0.1 percent by weight relative to the xylylene omega , omega '"'"''"'"'-diisocyanate.

4. The method according to claim 1, wherein the 1- nylon-formation suppressor contains a group of the formula:

-SO2NH -in its molecule.

5. The method according to claim 4, wherein the compound is benzenesulfonamide.

6. The method according to claim 4, wherein the compound is benzenesulfonanilide.

7. The method according to claim 4, wherein the compound is toluenesulfonamide.

8. The method according to claim 4, wherein the compound is o-benzoic sulfimide.