Claims
- 1. A polyisocyanate composition which is storage stable at temperatures of about 0.degree. C. which composition consisting essentially of a crude polymethylene polyphenylene polyisocyanate containing from about 50 to 80 weight percent 2-ring diphenylmethane diisocyanate, wherein from about 7 to about 35 weight percent of the 2-ring diisocyanate is 2,4'-diphenylmethane diisocyanate, from about 65 to about 93 weight percent of the 2-ring diisocyanate is 4,4'-diphenylmethane diisocyanate and wherein the 2-ring diisocyanate contains from 1 to 5 weight percent uretonimine structure the remainder of said polyisocyanate composition comprising a polyisocyanate having a functionality greater than 2.
- 2. The polyisocyanate composition of claim 1 wherein the 2,4'-diphenylmethane diisocyanate is from about 7 to about 12 weight percent of the 2-ring diisocyanate.
- 3. The polyisocyanate composition of claim 1 wherein the 2-ring diisocyanate is from about 60 to about 70 weight percent.
Parent Case Info
This is a continuation-in-part of application Ser. No. 695,206 filed Jan. 25, 1985 now abandoned.
US Referenced Citations (12)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
695206 |
Jan 1985 |
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