US4179432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized polypropylene compositions
Assignee: Cincinnati Milacron Chemicals Inc
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Filing: 1975-09-02
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Granted: 1979-12-18
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Expires: 1995-09-02
Abstract
Abstract Polymers of olefins are stabilized against ultraviolet light by a synergistic combination of stabilizers including (1) a hydroxybenzophenone and (2) an organotin compound of the formula: (a) RnSn--SR 1 COOR 2 ) 4-n, (b) RnSn--S--R 2 ) 4-n, (c) RnSn--S R 1 OOCR 2 ) 4-n, (d) ((R) 3 Sn-S) x R 4 --Z) y , or ##STR1## where R is alkyl, alkenyl, aryl, aralkyl, alkaryl or cycloalkyl, R 1 is alkylene, arylene, cycloalkylene, aralkylene or alkarylene, R 2 is an alkyl, aryl, aralkyl, alkenyl, alkaryl or cycloalkyl, R 5 is alkylene, R 4 is aliphatic, aromatic, araliphatic, alkyl substituted aromatic or cycloaliphatic radical of at least 2 carbon atoms and having a free valence of x+y, Z is --OH, --COOH, --COOR 2 or --OOCR 2 or Z can be a mixture of these radicals if y is greater than 1, x is 1 to 4, y is 0 to 3, x+y is 1 to 4 and n is 1 to 3. Preferably the olefin is polyethylene or polypropylene. Preferably the hydroxybenzophenone also has at least one alkoxy group.
Inventors
- 👤 Kenneth R. Molt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:05
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; C08K5/57; C08K5/58
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
184 words
A composition comprising polypropylene stabilized against ultraviolet light by a stabilizingly effective amount of a synergistic mixture of (1) a 2-hydroxybenzophenone and (2) an organotin compound of the formula: (a) RnSn--SR 1 COOR 2 ) 4-n, (b) RnSn--S-R 2 ) 4-n, (c) RnSn--S R 1 OOCR 2 ) 4-n, (d) ((R) 3 Sn--S) x R 4 --Z) y , or ##STR4## where R is alkyl, aryl, alkenyl, alkaryl, alkaryl or cycloalkyl, R 1 is alkylene, arylene, cycloalkylene, aralkylene or alkarylene, R 2 is an alkyl, aryl, aralkyl, alkenyl, al-aryl or cycloalkyl, R 5 is alkylene, R 4 is aliphatic, aromatic, araliphatic, alkyl substituted aromatic or cycloaliphatic radical and having a free valence of x+y, Z is --OH, --COOH, --COOR 2 or --OOCR 2 , x is 1 to 4, y is 0 to 3, x+y is 1 to 4 and n is 1 to 3, with the proviso that when x is 1 and y is 1 and R 4 is alkylene, arylene, cycloalkylene, aralkylene or alkarylene Z is not COOR 2 or --OOCR 2 and when x is 1 y is not 0.
Claim 2
Dependent Claim
184 words
A composition comprising polypropylene stabilized against ultraviolet light by a stabilizingly effective amount of a synergistic mixture of (1) a 2-hydroxybenzophenone and (2) an organotin compound of the formula: (a) RnSn--SR 1 COOR 2 ) 4-n, (b) RnSn--S-R 2 ) 4-n, (c) RnSn--S R 1 OOCR 2 ) 4-n, (d) ((R) 3 Sn--S) x R 4 --Z) y , or ##STR4## where R is alkyl, aryl, alkenyl, alkaryl, alkaryl or cycloalkyl, R 1 is alkylene, arylene, cycloalkylene, aralkylene or alkarylene, R 2 is an alkyl, aryl, aralkyl, alkenyl, al-aryl or cycloalkyl, R 5 is alkylene, R 4 is aliphatic, aromatic, araliphatic, alkyl substituted aromatic or cycloaliphatic radical and having a free valence of x+y, Z is --OH, --COOH, --COOR 2 or --OOCR 2 , x is 1 to 4, y is 0 to 3, x+y is 1 to 4 and n is 1 to 3, with the proviso that when x is 1 and y is 1 and R 4 is alkylene, arylene, cycloalkylene, aralkylene or alkarylene Z is not COOR 2 or --OOCR 2 and when x is 1 y is not 0.
Claim 3
Dependent Claim
41 words
A composition according to claim 1 wherein (1) is an unsubstituted hydroxybenzophenone or an alkoxy substituted 2-hydroxybenzophenone, the alkoxy group having 1 to 18 carbon atoms and wherein in organotin compound (2) R 4 is alkylene, arylene, aralkylene, cycloalkylene, or alkarylene.
Claim 4
Dependent Claim
117 words
A composition according to claim 2 wherein R is alkyl of 1 to 20 carbon atoms, phenol, naphthyl, benzyl, alkylphenyl having 1 to 18 carbon atoms in the alkyl group, alkenyl of 2 to 18 carbon atoms, cyclohexyl or cyclopentyl, R 2 is alkyl of 1 to 20 carbon atoms, phenyl, naphthyl, benzyl, alkylphenyl having 1 to 18 carbon atoms in the alkyl group, alkenyl of 2 to 18 carbon atoms, cyclohexyl or cyclopentyl, R 1 is alkylene of 1 to 18 carbon atoms, phenylene, naphthylene, cyclohexylene, cyclopentylene or xylylene, R 4 is alkylene of 1 to 18 carbon atoms, phenylene, naphthylene, cyclohexylene, cyclopentylene or xylylene and R 5 is alkylene of 2 to 18 carbon atoms.
Claim 5
Dependent Claim
16 words
A composition according to claim 3 wherein R is alkyl of 1 to 8 carbon atoms.
Claim 6
Dependent Claim
48 words
A composition according to claim 4 wherein R 2 is alkyl of 1 to 18 carbon atoms, R 1 is alkylene of 1 to 5 carbon atoms, R 4 is alkylene of 2 to 18 carbon atoms and R 5 is alkylene of 2 to 18 carbon atoms.
Claim 7
Dependent Claim
30 words
A composition according to claim 5 wherein (2) is a mixture of two compounds in one of which n is 1 and in the other of which n is 2.
Claim 8
Dependent Claim
12 words
A composition according to claim 5 wherein n is 1 or 2.
Claim 9
Dependent Claim
10 words
A composition according to claim 5 wherein (2) is (a).
Claim 10
Dependent Claim
17 words
A composition according to claim 8 wherein R 1 is alkylene of 1 to 2 carbon atoms.
Claim 11
Dependent Claim
10 words
A composition according to claim 9 wherein (1) is 2-hydroxyalkoxybenzophenone.
Claim 12
Dependent Claim
10 words
A composition according to claim 10 wherein (1) is 2,2'-dihydroxy-4-alkoxy-benzophenone.
Claim 13
Dependent Claim
10 words
A composition according to claim 10 wherein (1) is 2-hydroxy-4-alkoxybenzophenone.
Claim 14
Dependent Claim
16 words
A composition according to claim 18 wherein the alkoxy group has 8 to 12 carbon atoms.
Claim 15
Dependent Claim
10 words
A composition according to claim 5 wherein (2) is (b).
Claim 16
Dependent Claim
16 words
A composition according to claim 14 wherein (1) is 2-hydroxyalkoxybenzophenone and R is methyl or butyl.
Claim 17
Dependent Claim
10 words
A composition according to claim 15 wherein (1) is 2,2'-dihydroxy-4-alkoxy-benzophenone.
Claim 18
Dependent Claim
10 words
A composition according to claim 15 wherein (1) is 2-hydroxy-4-alkoxybenzophenone.
Claim 19
Dependent Claim
16 words
A composition according to claim 17 wherein the alkoxy group has 8 to 18 carbon atoms.
Claim 20
Dependent Claim
10 words
A composition according to claim 5 wherein (2) is (c).
Claim 21
Dependent Claim
17 words
A composition according to claim 19 wherein R 1 is alkylene of 2 to 5 carbon atoms.
Claim 22
Dependent Claim
10 words
A composition according to claim 20 wherein (1) is 2-hydroxyalkoxybenzophenone.
Claim 23
Dependent Claim
10 words
A composition according to claim 21 wherein (1) is 2,2'-dihydroxy-4-alkoxybenzophenone.
Claim 24
Dependent Claim
10 words
A composition according to claim 21 wherein (1) is 2-hydroxy-4-alkoxybenzophenone.
Claim 25
Dependent Claim
16 words
A composition according to claim 23 wherein the alkoxy group has 8 to 18 carbon atoms.
Claim 26
Dependent Claim
10 words
A composition according to claim 5 wherein (2) is (d).
Claim 27
Dependent Claim
17 words
A composition according to claim 25 wherein R 4 is alkylene of 2 to 6 carbon atoms.
Claim 28
Dependent Claim
10 words
A composition according to claim 26 wherein (1) is 2-hydroxyalkoxybenzophenone.
Claim 29
Dependent Claim
10 words
A composition according to claim 27 wherein (1) is 2,2'-dihydroxy-4-alkoxybenzophenone.
Claim 30
Dependent Claim
10 words
A composition according to claim 27 wherein (1) is 2-hydroxy-4-alkoxybenzophenone.
Claim 31
Dependent Claim
16 words
A composition according to claim 29 wherein the alkoxy group has 8 to 18 carbon atoms.
Claim 32
Dependent Claim
21 words
A composition according to claim 26 wherein R 4 is alkylene of 2 to 6 carbon atoms and Z is --OH.
Claim 33
Dependent Claim
21 words
A composition according to claim 26 wherein R 4 is alkylene of 1 to 2 carbon atoms and Z is --COOH.
Claim 34
Dependent Claim
10 words
A composition according to claim 5 wherein (2) is (e).
Claim 35
Dependent Claim
17 words
A composition according to claim 33 wherein R 5 is alkylene of 2 to 6 carbon atoms.
Claim 36
Dependent Claim
16 words
A composition according to claim 34 wherein (1) is 2-hydroxyalkoxybenzophenone and R is methyl or butyl.
Claim 37
Dependent Claim
10 words
A composition according to claim 35 wherein (1) is 2,2'-dihydroxy-4-alkoxybenzophenone.
Claim 38
Dependent Claim
10 words
A composition according to claim 35 wherein (1) is 2-hydroxy-4-alkoxybenzophenone.
Claim 39
Dependent Claim
16 words
A composition according to claim 37 wherein the alkoxy group has 8 to 18 carbon atoms.
Claim 40
Dependent Claim
26 words
A composition according to claim 5 wherein the synergistic combination of stabilizers is present in an amount of 0.01 to 3% by weight of the polypropylene.
Claim 41
Dependent Claim
26 words
A composition according to claim 39 wherein (1) is 10 to 90% and (2) is 90 to 10% of the total weight of (1) and (2).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |