Patent US2253882A successfully refreshed from Google Patents.
Patent US3898303A successfully refreshed from Google Patents.
US3898303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piperidine-spiro-hydantoin derivatives and their use as stabilizers
Assignee: Sankyo Co Ltd
•
Filing: 1973-05-10
•
Granted: 1975-08-05
•
Expires: 1993-05-10
Abstract
Abstract New piperidine-spiro-hydantoin derivatives represented by the formula WHEREIN R represents an alkyl group, an alkenyl group, an alkenoyl group which may be substituted with an aryl group, a hydroxyalkyl group, an alkoxyalkyl group, an alkoxycarbonylalkyl group, an acyloxyalkyl group, a cyanoalkyl group or nitroso group, and X and Y individually represent oxygen atom or sulfur atom. They are useful as stabilizers against photo- and thermaldeterioration of various synthetic polymers.
Inventors
- 👤 Keisuke Murayama
- 👤 Syoji Morimura
- 👤 Takao Yoshioka
- 👤 Toshimasa Toda
- 👤 Eiko Mori
- 👤 Hideo Horiuchi
- 👤 Susumu Higashida
- 👤 Katsuaki Matsui
- 👤 Tomoyuki Kurumada
- 👤 Noriyuki Ohta
- 👤 Hisayou Osawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:20
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3445
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
28 words
A SYNTHETIC POLYMER COMPOSITION STABILIZED AGAINST PHOTO- AND THERMAL-DETERIOTATION WHEREIN THERE IS INCORPORATED, IN A SUFFICIENT AMOUNT TO PREVENT SAID DETERIORATION, AT LEAST ONE COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
28 words
A SYNTHETIC POLYMER COMPOSITION STABILIZED AGAINST PHOTO- AND THERMAL-DETERIOTATION WHEREIN THERE IS INCORPORATED, IN A SUFFICIENT AMOUNT TO PREVENT SAID DETERIORATION, AT LEAST ONE COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
29 words
The synthetic polymer composition according to claim 1 wherein said compound (I) is incorporated in an amount of 0.01-5.0% by weight, based upon the amount of the synthetic polymer.
Claim 4
Dependent Claim
14 words
The synthetic polymer composition according to claim 1 wherein said polymer is a polyolefin.
Claim 5
Dependent Claim
15 words
The synthetic polymer composition according to claim 1 wherein said polymer is a polyvinyl chloride.
Claim 6
Dependent Claim
14 words
The synthetic polymer composition according to claim 1 wherein said polymer is a polyurethane.
Claim 7
Dependent Claim
14 words
The synthetic polymer composition according to claim 1 wherein said polymer is a polyester.
Claim 8
Dependent Claim
14 words
The synthetic polymer composition according to claim 1 wherein said polymer is a polyacetal.
Claim 9
Dependent Claim
15 words
The synthetic polymer composition according to claim 1 wherein said polymer is an acrylonitrile-styrene-butadiene copolymer.
Claim 10
Dependent Claim
32 words
The synthetic polymer composition according to claim 1 wherein said compound (I) is selected from the group consisting of 1,3,8-triaza-7,7,8,9,9-pentamethyl-spiro(4.5)decane-2,4-dione, 1,3,8-triaza-7,7,9,9-tetramethyl-8-octyl-spiro(4.5)decane-2,4-dione, 1,3,8-triaza-8-(2-ethoxyethyl)-7,7,9,9-tetramethyl-spiro-(4.5)decane-2,4 -dione, 8-acryloyl-1,3,8-triaza-7,7,9,9-tetramethyl-spiro(4.5)decane-2, 4-dione, 8-allyl-1,3,8-triaza-7,7,9,9-tetramethyl-spiro(4.5)decane-2,4-dione, 8(2-acetoxyethyl)-1,3,8-triaza-7,7,9,9-tetramethyl-spiro-(4.5)decane-2,4 -dione, 1,3,8-triaza-8-(2-cyanoethyl)-7,7,9,9-tetramethyl-spiro(4.5)-decane-2,4 -dione and 1,3,8-triaza-8-ethoxycarbonylmethyl-7,7,9,9-tetramethyl-spiro(4.5)decane-2,4-dione.
References Cited (Backward Citations)
US2684965A
Cited
US3126393A
Cited
US3474068A
Cited
US3547874A
Cited
US3542729A
Cited
US3705126A
Cited
US3705166A
Cited
US3759926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |