Claims
- 1. A polyisocyanate mixture comprising an aromatic polyisocyanate represented by the general formula: ##STR7## wherein A represents a phenylene group, alkyl-substituted phenylene group, diphenylene group, diphenyl ether group, or naphthylenyl group, R.sub.1 is a halogen atom, lower alkoxy group with a carbon number of 4 or less or lower alkyl group with a carbon number of 5 or less, R.sub.1 s may be the same of different from each other and may form a ring, l means 1 or 2, m is an integer of 0-3, and n is an integer of 0-300 with the proviso that when A is a phenylene group n is at least 1.
- 2. The polyisocyanate as claimed in claim 1 wherein l is 1 and m is 0.
- 3. The polyisocyanate as claimed in claim 2 which comprises a mixture of aromatic polyisocyanates of formula (a) wherein each n is 0, 1, 2, 3 or 4.
- 4. The polyisocyanate as claimed in claim 3 wherein A is a phenylene group.
- 5. The polyisocyanate as claimed in claim 1 wherein A is a phenylene group.,
- 6. The polyisocyanate as claimed in claim 5 wherein l is 1 and m is 0.
- 7. The polyisocyanate as claimed in claim 1 wherein m is 2 or 3 and two of the R.sub.1 groups join to form a 5-6 membered alicyclic ring which may have side chain(s).
- 8. The polyisocyanate as claimed in claim 5 wherein A is a p-phenylene group, and n is at least 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-55043 |
Mar 1988 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/318,756, filed Mar. 3, 1989, now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (1)
Number |
Date |
Country |
57-54153 |
Jul 1982 |
JPX |
Non-Patent Literature Citations (2)
Entry |
Fieser et al., Advanced Organic Chemistry, p. 617, Reinhold Publ. Corp. (1961) New York. |
Ghatge et al., Indian Chem. J., 13 (9), pp. 24-30 (1979). |
Continuations (1)
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Number |
Date |
Country |
Parent |
318756 |
Mar 1989 |
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