Claims
- 1. A polymerization inhibitor system comprising an N-phenyl-1,4-benzoquinoneimine compound having the formula: ##STR6## wherein R is NR.sup.1 R.sup.2 ; wherein R.sup.1 is C.sub.1 -C.sub.8 alkyl and R.sup.2 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.16 alkaryl and C.sub.3 -C.sub.8 cycloalkyl; and R.sup.4 and R.sup.5 are independently selected from the group consisting of hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.4 -C.sub.8 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.16 alkaryl.
- 2. A polymerization inhibitor system comprising:
- (a) an N-phenyl-1,4-benzoquinoneimine compound of formula I: ##STR7## wherein R is NR.sup.1 R.sup.2 ; wherein R.sup.1 is C.sub.1 -C.sub.8 alkyl and R.sup.2 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.16 alkaryl and C.sub.3 -C.sub.8 cycloalkyl; and R.sup.4 and R.sup.5 are independently selected from the group consisting of hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.4 -C.sub.8 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.16 alkaryl; and
- (b) a phenylenediamine of formula II ##STR8## wherein R.sup.6 is C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.16 alkaryl; and R.sup.7.sub.1 R.sup.8 and R.sup.9 are independent selected from the group consisting of hydrogen, C.sub.1 -C.sub.12 alkyl, C.sub.3 -C.sub.12 cycloalkyl, C.sub.7 -C.sub.11 aralkyl and C.sub.7 -C,.sub.6 alkaryl.
- 3. The polymerization inhibitor system of claim 2 wherein R.sup.1 and R.sup.2 are CH.sub.3 ; and R.sup.4 and R.sup.5 are hydrogen.
- 4. The polymerization inhibitor system of claim 2 wherein R.sup.4 and R.sup.5 are hydrogen.
- 5. The polymerization inhibitor system of claim 2 wherein R.sup.4 and R.sup.5 are hydrogen.
- 6. The polymerization inhibitor system composition of claim 2 wherein R.sup.4 and R.sup.5 are hydrogen; and R.sup.2 is phenyl.
- 7. The polymerization inhibitor system of claim 2 wherein component (b) is N-phenyl-N-(1,4-dimethylpentyl)-p-phenylenediamine.
- 8. A composition in accordance with claim 2 wherein the weight ratio of component (a) to component (b) is between about 10:1 and about 1:10.
- 9. A system in accordance with claim 2 wherein the weight ratio of component (a) to component (b) is between about 4:1 and about 1:4.
- 10. A polymerization inhibitor system comprising a compound having the structure: ##STR9## wherein R.sup.4 and R.sup.5 are both hydrogen, and a phenylenediamine of formula II ##STR10## wherein R.sup.6 is C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.16 alkaryl; and R.sup.7, R.sup.8 and R.sup.9 are independently selected from the group consisting of hydrogen, C.sub.1 -C.sub.12 alkyl, C.sub.3 -C.sub.12 cycloalkyl, C.sub.7 -C.sub.11 aralkyl and C.sub.7 -C.sub.16 alkaryl.
Parent Case Info
This is a continuation of prior complete application U.S. application Ser. No. 08/053,958 filed Apr. 27th, 1993, abandoned, which is a continuation of application Ser. No. 07/600,056, filed Oct. 18, 1990, now abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0158512 |
Nov 1986 |
INX |
2159826 |
Dec 1985 |
GBX |
Non-Patent Literature Citations (3)
Entry |
Nigam et al., CA 107: 116131 a (Abstract Only). |
Taimr et al. CA 108: 133138 w (Abstract Only). |
PCT International Application No. PCT/US 91/07188 Search Report, 1992. |
Continuations (2)
|
Number |
Date |
Country |
Parent |
053958 |
Apr 1993 |
|
Parent |
600056 |
Oct 1990 |
|