US4576734A
Expired / Lapsed
US
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Stabilizer for synthetic resins
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1985-03-15
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Granted: 1986-03-18
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Expires: 2005-03-15
Abstract
Abstract A stabilizer for synthetic resins containing as an effective component a mixture comprising a phenol type compound (I) represented by the formula (I), <IMAGE> (I) <IMAGE> +TR <IMAGE> wherein R1represents a C1-C3 alkyl group, and at least one sulfur type compound (II) selected from the group consisting of compounds represented by the formula (II-1), <IMAGE> (II-1) wherein R2 represents a C4-C20 alkyl group, and compounds represented by the formula (II-2), <IMAGE> (II-2) wherein R3 represents a C3-C18 alkyl group, and R4 and R5 independently represent a hydrogen atom or a C1-C6 alkyl group, the weight ratio of phenol type compound (I) to sulfur type one (II) being 1 to 0.5-15.
Inventors
- 👤 Tamaki Ishii
- 👤 Shinichi Yachigo
- 👤 Manji Sasaki
- 👤 Masahisa Shionoya
- 👤 Haruki Okamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C08K5/04; C08K5/15; C08K5/156; C08K5/1575; C08K5/378
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
122 words
A stabilizer for synthetic resins containing as an effective component a mixture comprising a phenol type compound (I) represented by the formula (I), ##STR13## wherein R 1 represents a C 1 -C 3 alkyl group, and at least one sulfur type compound (II) selected from the group consisting of compounds represented by the formula (II-1), ##STR14## wherein R 2 represents a C 4 -C 20 alkyl group, and compounds represented by the formula (II-2), ##STR15## wherein R 3 represents a C 3 -C 18 alkyl group, and R 4 and R 5 independently represent a hydrogen atom or a C 1 -C 6 alkyl group, the weight ratio of phenol type compound (I) to sulfur type one (II) being 1 to 0.5-15.
Claim 2
Dependent Claim
122 words
A stabilizer for synthetic resins containing as an effective component a mixture comprising a phenol type compound (I) represented by the formula (I), ##STR13## wherein R 1 represents a C 1 -C 3 alkyl group, and at least one sulfur type compound (II) selected from the group consisting of compounds represented by the formula (II-1), ##STR14## wherein R 2 represents a C 4 -C 20 alkyl group, and compounds represented by the formula (II-2), ##STR15## wherein R 3 represents a C 3 -C 18 alkyl group, and R 4 and R 5 independently represent a hydrogen atom or a C 1 -C 6 alkyl group, the weight ratio of phenol type compound (I) to sulfur type one (II) being 1 to 0.5-15.
Claim 3
Dependent Claim
18 words
A stabilizer for synthetic resins as described in claim 1, wherein the phenol type compound (I) is 3,9-bis[2-{3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy}-1,1-dimethylethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane.
Claim 4
Dependent Claim
18 words
A stabilizer for synthetic resins as described in claim 1, wherein the sulfur type compound (II-1) is tetrakis(3-dodecylthiopropionyloxymethyl)methane.
Claim 5
Dependent Claim
18 words
A stabilizer for synthetic resins as described in claim 1, wherein the sulfur type compound (II-2) is 3,9-bis(2-dodecylthioethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane.
Claim 6
Dependent Claim
18 words
A stabilizer for synthetic resins as described in claim 1, wherein the sulfur type compound (II-2) is 3,9-bis(2-octadecylthiopropyl)-2,4,8,10-tetraoxaspiro[5.5]undecane.
Claim 7
Dependent Claim
18 words
A stabilizer for synthetic resins as described in claim 1, wherein the synthetic resin is a polyolefin resin.
Claim 8
Dependent Claim
16 words
A stabilizer for synthetic resins as described in claim 6, wherein the polyolefin resin is polypropylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |