US4169089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxybenzophenone stabilizer composition
Assignee: Argus Chemical Corp
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Filing: 1978-03-31
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Granted: 1979-09-25
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Expires: 1998-03-31
Abstract
Abstract Synthetic resins processed at temperatures in excess of 200 DEG C. are protected against deterioration on exposure to light of wave length shorter than 400 nanometers by compounding with a stabilizer composition comprising (A) 40 to 90 parts by weight of at least one 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group, (B) 5 to 30 parts by weight of at least one 3,5'-methylenedi(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group, (C) 5 to 40 parts by weight of at least one 3,3'-methylenebis(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group. Synthetic resins suitably stabilized with compositions of the invention include thermoplastic polyesters such as polyhydric phenol carbonate polyesters and alkanediol terephthalate polyesters, as well as high melting polyolefins such as poly-4-methylpentene and polypropylene.
Inventors
- 👤 Motonobu Minagawa
- 👤 Naohiro Kubota
- 👤 Kazuo Sugibuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
102 words
A stabilizer composition for enhancing the resistance to deterioration of a synthetic resin processed at a temperature in excess of 200° C. on exposure to light of wave length shorter than 400 nanometer, comprising (A) 40 to 90 parts by weight of at least one 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group, (B) 5 to 30 parts by weight of at least one 3,5'-methylenedi(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group, and (C) and 5 to 40 parts by weight of at least one 3,3'-methylenebis(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group.
Claim 2
Dependent Claim
102 words
A stabilizer composition for enhancing the resistance to deterioration of a synthetic resin processed at a temperature in excess of 200° C. on exposure to light of wave length shorter than 400 nanometer, comprising (A) 40 to 90 parts by weight of at least one 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group, (B) 5 to 30 parts by weight of at least one 3,5'-methylenedi(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group, and (C) and 5 to 40 parts by weight of at least one 3,3'-methylenebis(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group.
Claim 3
Dependent Claim
20 words
A stabilizer composition according to claim 1 in which the 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone), the 3,5'-methylenedi(2-hydroxy-4-alkoxybenzophenone), and the 3,3'-methylenebis(2-hydroxy-4-alkoxybenzophenone) have identical alkoxy groups.
Claim 4
Dependent Claim
13 words
A stabilizer composition according to claim 1 in which the 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone) is 5,5'-methylenebis(2-hydroxy-4-methoxybenzophenone).
Claim 5
Dependent Claim
13 words
A stabilizer composition according to claim 1 in which the 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone) is 5,5'-methylenebis(2-hydroxy-4-octoxybenzophenone).
Claim 6
Dependent Claim
13 words
A stabilizer composition according to claim 1 in which the 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone) is 5,5'-methylenebis(2-hydroxy-4-lauroxybenzophenone).
Claim 7
Dependent Claim
48 words
A stabilizer composition according to claim 1 comprising as an additional ingredient at least one polymer stabilizer selected from the group consisting of calcium, magnesium, nickel, stannous, strontium, and zinc salts of non-nitrogenous monocarboxylic acids having 6 to 24 carbon atoms, organic phosphites, phenols, and thiodipropionic acid esters.
Claim 8
Dependent Claim
16 words
A stabilizer composition according to claim 6 in which the added stabilizer is a calcium salt.
Claim 9
Dependent Claim
16 words
A stabilizer composition according to claim 6 in which the added stabilizer is a zinc salt.
Claim 10
Dependent Claim
15 words
A stabilizer composition according to claim 6 in which the added stabilizer is a phenol.
Claim 11
Dependent Claim
17 words
A stabilizer composition according to claim 6 in which the added stabilizer is a thiodipropionic acid ester.
Claim 12
Dependent Claim
54 words
A synthetic resin composition having enhanced resistance to deterioration on exposure to light of wave length shorter than 400 nanometers, comprising a synthetic resin processed at a temperature in excess of 200° C. and 0.001 to 10 parts by weight per 100 parts of synthetic resin of a stabilizer composition according to claim 1.
Claim 13
Dependent Claim
25 words
A synthetic resin composition according to claim 11 in which the synthetic resin is a polymer of an alpha-olefin having 3 to 6 carbon atoms.
Claim 14
Dependent Claim
20 words
A synthetic resin composition according to claim 11 in which the synthetic resin is a thermoplastic polyhydric phenol carbonate polyester.
Claim 15
Dependent Claim
24 words
A synthetic resin composition according to claim 11 in which the synthetic resin is a thermoplastic 2 to 4 carbon atom alkanediol terephthalate polyester.
References Cited (Backward Citations)
US3399237A
Cited
US3649695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |