Claims
- 1. A dicyanate ester of the formula: ##STR4## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and each is hydrogen, alkyl, perfluoroalkyl, aryl or halogen;
- and A is a methylene, mono- or dialkyl substituted methylene, or oxy, bridge,
- with the proviso that when A is methylene, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are not simultaneously hydrogen.
- 2. A dicyanate ester according to Claim 1, wherein R.sub.1 and R.sub.2 are both C.sub.1 -C.sub.4 alkyl, aryl or halogen; R.sub.3 and R.sub.4 are both hydrogen, C.sub.1 -C.sub.4 alkyl or halogen; and A is methylene, 2,2-propylene, or oxy.
- 3. A dicyanate ester according to Claim 1 which is bis(2-cyanato-5-methylphenyl)methane, bis(2-cyanato-3,5-dimethylphenyl)methane, or bis(2-cyanato-5-t-butylphenyl)methane.
- 4. The dicyanate ester of claim 1, wherein A is a mono- or di-alkyl substituted methylene, or oxy.
Priority Claims (2)
Number |
Date |
Country |
Kind |
3-359938 |
Dec 1991 |
JPX |
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4-075148 |
Feb 1992 |
JPX |
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Parent Case Info
This application is a divisional of application Ser. No. 07/996,754, filed Dec. 24, 1992.
US Referenced Citations (6)
Foreign Referenced Citations (3)
Number |
Date |
Country |
2286129 |
Sep 1975 |
FRX |
2301514 |
Feb 1976 |
FRX |
1526450 |
Sep 1978 |
DEX |
Non-Patent Literature Citations (4)
Entry |
Chem Abtract 79:105605; Korshak et al; 1973. |
Chemical Abstracts 114(20): 187155s, 1990. |
Chemical Abstracts, vol. 79, No. 17, Oct. 29, 1973, 105605k. |
H. Hoyer, Chemische Berichte, vol. 94, No. 4, 1961. |
Divisions (1)
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Number |
Date |
Country |
Parent |
996754 |
Dec 1992 |
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