EP0342974A1
Expired / Lapsed
EP
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Bisurea light stabilizer for organic polymers
Assignee: EIDP Inc
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Filing: 1989-05-18
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Granted: —
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Expires: 2009-05-18
Abstract
Abstract A hydroxyphenyl-benzotriazole bisurea UV light stabilizer for organic polymers and a process for making it are provided. The stabilizer is particularly useful for spandex polymer yarns that are subjected to solvent scouring. A preferred stabilizer of the invention is a bisurea formed by reacting methylene- bis(4-phenyl-isocyanate) with 2-[2-hydroxy-3-(1,1-dimethylethyl)-5-(N-aminoethyl)propionamid-phenyl]-2H-benzotriazole.
Inventors
- 👤 Akitsugu Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/21; C08K5/34; C08K5/3467; C08K5/3472; C08K5/3475; C07; C07D; C07D249/00; C07D249/16; C07D249/18; C07D249/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
56 words
An ultraviolet-light stabilizer for organic polymers, the stabilizer being a bisurea compound of the structural formula (I) wherein R denotes a divalent group which connects the two isocyanate groups of an organic diisocyanate, R is a saturated hydrocarbon chain of 2 or 3 carbon atoms and R 2 denotes a monovalent radical containing a 2-(2'-hydroxyphenyl)benzotriazole group.
Claim 2
Dependent Claim
56 words
An ultraviolet-light stabilizer for organic polymers, the stabilizer being a bisurea compound of the structural formula (I) wherein R denotes a divalent group which connects the two isocyanate groups of an organic diisocyanate, R is a saturated hydrocarbon chain of 2 or 3 carbon atoms and R 2 denotes a monovalent radical containing a 2-(2'-hydroxyphenyl)benzotriazole group.
Claim 3
Dependent Claim
20 words
A stabilizer in accordance with claim 1 wherein R is selected from the group consisting of bis(p-phenylene)methane, bis(4-cyclohexylene)methane and 3,3,5-trimethyl-5-methylene-cyclohexyl.
Claim 4
Dependent Claim
15 words
A stabilizer in accordance with claim 1 or Claim 2 wherein R 2 is 3-(2H-benzotriazol-2-yl)-4-hydroxy--5-(1,1-dimethylethyl)-benzenepropanoyl.
Claim 5
Dependent Claim
16 words
A stabilizer in accordance with claim 3 wherein R is bis(p-phenylene)methane and R I is -CH2-CH2-.
Claim 6
Dependent Claim
43 words
A process for preparing an ultraviolet light stabilizer of claim 1 wherein an ester of 3-(2H-benzotriazol-2-yl)-4-hydroxy-5-(1,1-dimethylethyl)-benzenepropanoic acid is reacted with an excess of ethylene diamine to form an amide-amine intermediate product, which is then reacted with an organic diisocyanate to form the stabilizer.
Claim 7
Dependent Claim
16 words
A process in accordance with claim 5 wherein the diisocyanate is methylene-bis(4-phenyl-isocyanate), 4,4'-methylene-bis(cyclohexylisocyanate) or isophorone diisocyanate.
Claim 8
Dependent Claim
21 words
An organic polymer having dispersed therein an effective amount of the ultraviolet-light stabilizer of any one of Claims 1 to 4.
Claim 9
Dependent Claim
35 words
A polymer in accordance with claim 7 wherein the polymer is a spandex polymer and the effective amount is in the concentration range of 0.1 to 5 percent based on the weight of the polymer.
Claim 10
Dependent Claim
16 words
A polymer in accordance with claim 8 wherein the concentration range is 0.5 to 1.5 percent.
Claim 11
Dependent Claim
15 words
A shaped article formed from the polymer of any one of Claims 7 to 9.
Claim 12
Dependent Claim
14 words
A fiber formed from the polymer of any one of Claims 7 to 9.
Claim 13
Dependent Claim
4 words
2-[3-(2H-benzotriazole-2-yl)-4-hydroxy-5-(1,1-dimethylethyl)-benzene propanoyl] amido-ethyl amine.
Claim 14
Dependent Claim
4 words
2-[3-(2H-benzotriazole-2-yl)-4-hydroxy-5-(1,1-dimethylethyl)-benzene propanoyl] amido-ethyl amine.
References Cited (Backward Citations)
EP0057160B1
Cited
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