EP0068327A1
Expired / Lapsed
EP
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Protection from ultraviolet light by use of novel ultraviolet absorber
Assignee: Teijin Ltd
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Filing: 1982-06-16
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Granted: —
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Expires: 2002-06-16
Abstract
Abstract A photo-stabilized polymer composition comprising a polymer and as an ultraviolet absorber, at least one compound selected from specific cyclic imino esters having an aromatic nucleus, two carbon atoms of which form a part of the imino ester ring, such as 2,2'-p-phenylene-bis(3,1-benzoxazin-4-one), or 2,8-dimethyt-4H,6H-benzo[1,2-d:5,4-d']bis-[1,3]-oxazine-4,6-dione, in the unreacted state. The ultraviolet absorber has excellent stability to heat and oxidation, and is useful, for example, for protecting from ultraviolet light a molded article of a polymer whose deterioration by ultraviolet light is required to be retarded or prevented or for protecting from ultraviolet light an object subject to deleterious effects under ultraviolet light.
Inventors
- 👤 Nobuya Okumura
- 👤 Tetsuo Ichihashi
- 👤 Shunichi Matsumura
- 👤 Hiroo Inata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 05:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
149 words
A photo-stabilized polymer composition comprising a polymer and as an ultraviolet absorber, at least one compound selected from cyclic imino esters represented by the following formula (I) wherein X 1 represents a divalent aromatic residue in which the two bonds from X 1 are at the 1- and 2-positions; n is 1, 2 or 3; and R 1 represents a hydrocarbon residue having a valence of n which may further contain a hetero atom, or R 1 may be a direct bond when n is 2, and cyclic imino esters represented by the following formula (II) wherein A represents a group of the following formula (II)-a. or a group of the following formula (II)-b R 2 and R 3 are identical or different and each represents a monovalent hydrocarbon residue; and X 2 represents a tetravalent aromatic residue which may further contain a hetero atom, in the unreacted state.
Claim 2
Dependent Claim
149 words
A photo-stabilized polymer composition comprising a polymer and as an ultraviolet absorber, at least one compound selected from cyclic imino esters represented by the following formula (I) wherein X 1 represents a divalent aromatic residue in which the two bonds from X 1 are at the 1- and 2-positions; n is 1, 2 or 3; and R 1 represents a hydrocarbon residue having a valence of n which may further contain a hetero atom, or R 1 may be a direct bond when n is 2, and cyclic imino esters represented by the following formula (II) wherein A represents a group of the following formula (II)-a. or a group of the following formula (II)-b R 2 and R 3 are identical or different and each represents a monovalent hydrocarbon residue; and X 2 represents a tetravalent aromatic residue which may further contain a hetero atom, in the unreacted state.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein in formula (I), R 1 is an aromatic hydrocarbon residue having a valence of n.
Claim 4
Dependent Claim
17 words
The composition of claim 1 wherein in formula (I), R 1 is a divalent aromatic hydrocarbon residue.
Claim 5
Dependent Claim
29 words
The composition of claim 1 wherein in formula (I), R 1 is a divalent aromatic hydrocarbon residue in which the two bonds extend from positions farthest from each other.
Claim 6
Dependent Claim
28 words
The composition of claim 1 wherein the amount of the cyclic imino ester is 0.05 to 5 parts by weight per 100 parts by weight of the polymer.
Claim 7
Dependent Claim
25 words
The composition of claim 1 wherein the amount of the cyclic imino ester is 0.1 to 3 parts by weight per 100 parts by weight.
Claim 8
Dependent Claim
19 words
The composition of claim 1 wherein the polymer is a thermoplastic resin, a thermoplastic resin or an uncured elastomer.
Claim 9
Dependent Claim
18 words
The composition of claim 7 wherein the thermoplastic resin is a polyester, polyarnide, polycarbonate, polyolefin, polyether or polysulfone.
Claim 10
Dependent Claim
25 words
The composition of claim 7 wherein the thermosetting resin is a phenol-formaldehyde resin, melamine resin, polyurethan resin, urea resin, epoxy resin or unsaturated polyester resin.
Claim 11
Dependent Claim
16 words
10, The composition of claim 7 wherein the uncured elastomer is a natural or synthetic rubber.
Claim 12
Dependent Claim
66 words
A method for protecting from ultraviolet light a molded article of a polymer whose deterioration by ultraviolet light is required to be retarded or prevented, which comprises applying to said polymer article an amount, effective for retarding or preventing said ultraviolet deterioration, of at least one compound selected from the cyclic imino esters of formulae (I) and (II) defined in claim 1 in the unreacted state.
Claim 13
Dependent Claim
17 words
The method of claim 11 wherein said polymer is a substantially linear polymer or a crosslinked polymer.
Claim 14
Dependent Claim
12 words
The method of claim 12 wherein the substantially linear polymer is thermoplastic.
Claim 15
Dependent Claim
21 words
The method of claim 12 or 13 wherein the substantially linear polymer is a polyester, polyamide, polycarbonate, polyolefin, polyether or polysulfone.
Claim 16
Dependent Claim
18 words
The method of claim 13 wherein the crosslinked polymer is a cured thermosetting resin or a cured elastomer.
Claim 17
Dependent Claim
25 words
The method of claim 15 wherein the thermosetting resin is a phenol-formaldehyde resin, melamine resin, polyurethan resin, urea resin, epoxy resin or unsaturated polyester resin.
Claim 18
Dependent Claim
16 words
The method of claim 15 wherein the cured elastomer is a cured natural or synthetic rubber.
Claim 19
Dependent Claim
35 words
The method of claim 11 wherein the application of the cyclic imino ester to the polymer article is effected by incorporating the cyclic imino ester in the unreacted state in the polymer of the article.
Claim 20
Dependent Claim
35 words
The method of claim 11 wherein the application of the cyclic imino ester to the polymer article is effected by forming a coating containing the cyclic imino ester on the surface of the polymer article.
Claim 21
Dependent Claim
32 words
The method of claim 11 wherein the amount of the cyclic imino ester applied is 0.05 to 5 parts by weight per 100 parts by weight of the polymer of the article.
Claim 22
Dependent Claim
60 words
A method for protecting from ultraviolet light an object subject to deleterious effects under ultraviolet light, which comprises substantially shielding said object -- from ultraviolet light by means of a polymer article to which at least one compound selected from the cyclic imino esters of formulae (I) and (II) defined in claim 1 has been applied in the unreacted state.
Claim 23
Dependent Claim
17 words
The method of claim 21 wherein the polymer article is substantially transparent or semitransparent to visible light.
Claim 24
Dependent Claim
17 words
The method of claim 21 or 22 wherein the polymer article is a planar or hollow article.
Claim 25
Dependent Claim
32 words
The method of claim 21 wherein the amount of the cyclic imino ester applied is 0.05 to 5 parts by weight per 100 parts by weight of the polymer of the article.
Claim 26
Dependent Claim
19 words
Use of the cyclic imino ester of formula (I) or (II) defined in claim 1 as an ultraviolet absorber.
Claim 27
Dependent Claim
27 words
The use of claim 25 wherein the cyclic imino ester is a compound of the following formula (I)-l wherein R 11 represents a divalent aromatic hydrocarbon residue.
Claim 28
Dependent Claim
28 words
The use of claim 26 wherein formula (I)-1, R 11 is a divalent aromatic hydrocarbon residue in which the two bonds extend from positions farthest from each other.
Claim 29
Dependent Claim
18 words
The use of claim 26 or 27 wherein in formula (I)-1, R 11 is p-phenylene, p,p'-biphenylene, or 2,6-naphthylene.
References Cited (Backward Citations)
No citation records indexed.
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