US4495084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic scintillator
Assignee: Kyowa Gas Chemical Industry Co Ltd
•
Filing: 1982-08-16
•
Granted: 1985-01-22
•
Expires: 2002-08-16
Abstract
Abstract A plastic scintillator which comprises using as the matrix resin thereof a copolymer obtained by polymerizing (a) at least one compound represented by the general formula I: <IMAGE> (I) wherein, X and Y independently denote hydrogen atom or methyl group, providing that they do not exclusively denote methyl group, or a monomer mixture containing at least one compound of the general formula I in a weight proportion of at least 0.4 to the polymerizable monomer mixture to be used in the presence of (b) at least one monomer having at least two carbon-carbon double bonds capable of radical polymerization in the molecular unit thereof.
Inventors
- 👤 Tohru Shimizu
- 👤 Junji Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:16
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/203; C; C09; C09K; C09K11/00; C09K11/02; C09K11/06; G01T1/2033
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
168 words
A plastic scintillator in which a scintillating substance is incorporated in a matrix resin comprising a copolymer obtained by polymerizing a polymerizable mixture comprising at least 40 percent by weight of (a) at least one compound represented by the general formula I: ##STR6## wherein, X and Y independently denote hydrogen atom or methyl group providing they do not exclusively denote methyl group, and a crosslinking amount of (b) at least one copolymerizable monomer possessed of two carbon-carbon double bonds capable of radical polymerization in the molecular unit thereof selected from the group consisting of compounds represented by the general formula II: ##STR7## wherein, R denotes hydrogen atom or methyl group and n an integer of the value of 3 to 8; compounds represented by the general formula III: ##STR8## wherein, R and R' independently denote hydrogen atom or methyl group and m an intrger of the value of 1 to 23; and compounds represented by the general formula IV: ##STR9## wherein, R denotes hydrogen atom or methyl group.
Claim 2
Dependent Claim
168 words
A plastic scintillator in which a scintillating substance is incorporated in a matrix resin comprising a copolymer obtained by polymerizing a polymerizable mixture comprising at least 40 percent by weight of (a) at least one compound represented by the general formula I: ##STR6## wherein, X and Y independently denote hydrogen atom or methyl group providing they do not exclusively denote methyl group, and a crosslinking amount of (b) at least one copolymerizable monomer possessed of two carbon-carbon double bonds capable of radical polymerization in the molecular unit thereof selected from the group consisting of compounds represented by the general formula II: ##STR7## wherein, R denotes hydrogen atom or methyl group and n an integer of the value of 3 to 8; compounds represented by the general formula III: ##STR8## wherein, R and R' independently denote hydrogen atom or methyl group and m an intrger of the value of 1 to 23; and compounds represented by the general formula IV: ##STR9## wherein, R denotes hydrogen atom or methyl group.
Claim 3
Dependent Claim
26 words
A plastic scintillator according to claim 1, wherein the copolymerizable monomer has a weight proportion to the polymerizable mixture in the range of 0.001 to 0.1.
Claim 4
Dependent Claim
32 words
A plastic scintillator according to claim 1, wherein the polymerizable mixture of contains at least one copolymerizable monomer represented by the general formula I in a weight proportion of at least 0.7.
Claim 5
Dependent Claim
26 words
A plastic scintillator according to claim 1, wherein the copolymerizable monomer has a weight proportion to the polymerizable mixture in the range of 0.001 to 0.05.
Claim 6
Dependent Claim
20 words
A plastic scintillator according to claim 1, wherein the copolymerizable monomer is a compound represented by the general formula II.
Claim 7
Dependent Claim
24 words
A plastic scintillator according to claim 5, wherein n in the general formula II denotes an integer of the value of 3 to 6.
Claim 8
Dependent Claim
20 words
A plastic scintillator according to claim 1, wherein the copolymerizable monomer is a compound represented by the general formula III.
Claim 9
Dependent Claim
24 words
A plastic scintillator according to claim 7, wherein m in the general formula III denotes an integer of the value of 1 to 9.
Claim 10
Dependent Claim
21 words
A plastic scintillator according to claim 1, wherein the compound represented by the general formula I is styrene or vinyl toluene.
Claim 11
Dependent Claim
28 words
A plastic scintillator according to claim 1, wherein the copolymerizable monomer is an alkyl acrylate or methacrylate the alkyl moiety of which has 1 to 4 carbon atoms.
Claim 12
Dependent Claim
14 words
A plastic scintillator according to claim 10, wherein the methyl methacrylate is methyl methacrylate.
Claim 13
Dependent Claim
14 words
A plastic scintillator according to claim 6, wherein the copolymerizable monomer is 1,6-hexanediol diacrylate.
Claim 14
Dependent Claim
15 words
A plastic scintillator according to claim 8, wherein the copolymerizable monomer is polypropylene glycol dimethacrylate.
Claim 15
Dependent Claim
16 words
A plastic scintillator according to claim 1, wherein the copolymerizable monomer is neopentylglycol diacrylate or dimethacrylate.
Claim 16
Dependent Claim
19 words
A plastic scintillator according to claim 1, wherein the content of scintillating substance is 0.1 to 5% by weight.
Claim 17
Dependent Claim
23 words
A plastic scintillator according to claim 1, wherein the scintillating substance is selected from the group consisting of paraterphenyl, 2,5-diphenyl oxazole and 2-(4-tertiary-butylphenyl)-5-(4-biphenylyl)-1,3,4,-oxadiazole.
Claim 18
Dependent Claim
13 words
A plastic scintillator according to claim 1 further containing a secondary scintillating substance.
Claim 19
Dependent Claim
21 words
A plastic scintillator according to claim 17, wherein the content of the secondary scintillating substance is 0.005 to 0.05% by weight.
Claim 20
Dependent Claim
24 words
A plastic scintillator according to claim 17, wherein the secondary scintillating substance is selected from the group consisting of 1,4-bis-2-15-phenyloxazolyl)-benzene, 2,5-bis-2-15-tertiary-butylbenzoxazolyl)-thiophene, 1,4-bis-(2-methylstyryl)-benzene and 4,4-bis-(2,5-dimethylstyryl)-benzene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |