Patent US4275174A successfully refreshed from Google Patents.
US4275174A
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Neutron shielding polymer composition and a process for producing the same
Assignee: Kyowa Gas Chemical Industry Co Ltd
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Filing: 1979-04-26
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Granted: 1981-06-23
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Expires: 1999-04-26
Abstract
Abstract A neutron shielding polymer composition comprising a polymerization product of a base monomer ingredient containing as an essential ingredient at least one monomer selected from the group consisting of alkyl methacrylates containing 1-4 carbon atoms in the alkyl group and styrene in admixture with a saturated boric acid ester which contains as an essential constituent component a polyol containing 3-16 carbon atoms and in which a molar ratio A of said polyol to boron atoms in said boric acid ester formed from said polyol being in the range of 0.6<A<4, the boron content B (wt. %) in the total monomer mixture being in the range of 1≦B<6.
Inventors
- 👤 Shin-ichi Tadokoro
- 👤 Hirozo Segawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:50
CPC Classifications
G; G21; G21F; G21F1/00; G21F1/02; G21F1/10; G21F1/103; C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08; C08F2/00; C08F2/44; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/16; C08F20/18; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F230/00; C08F230/04; C08F230/06; C08K; C08K5/00; C08K5/55; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1802; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31935; Y10T428/31938
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
105 words
An optically-transparent, neutron shielding polymer composition comprising a polymerization product of a base monomer ingredient containing as an essential mono-olefinic ingredient at least one monomer selected from the group consisting of (1) an alkyl methacrylate containing 1-4 carbon atoms in the alkyl group and (2) styrene polymerized in admixture with a boric acid ester of a polyol containing 3-16 carbon atoms and in which a molar ratio A of said polyol to boron atoms in said boric acid ester formed from said polyol being in the range of 0.6<A<4, the boron content B (wt%) in the total monomer mixture being in the range of 1≦B<6.
Claim 2
Dependent Claim
105 words
An optically-transparent, neutron shielding polymer composition comprising a polymerization product of a base monomer ingredient containing as an essential mono-olefinic ingredient at least one monomer selected from the group consisting of (1) an alkyl methacrylate containing 1-4 carbon atoms in the alkyl group and (2) styrene polymerized in admixture with a boric acid ester of a polyol containing 3-16 carbon atoms and in which a molar ratio A of said polyol to boron atoms in said boric acid ester formed from said polyol being in the range of 0.6<A<4, the boron content B (wt%) in the total monomer mixture being in the range of 1≦B<6.
Claim 3
Dependent Claim
23 words
A polymer composition as defined in claim 1, wherein said polyol is one which has 2-3 alcoholic hydroxyl groups and 3-13 carbon atoms.
Claim 4
Dependent Claim
15 words
A polymer composition as defined in claim 2, wherein said polyol is an aliphatic polyol.
Claim 5
Dependent Claim
83 words
A polymer composition as defined in claim 3, wherein said polyol is 1,3-glycol expressed by the general formula (I) ##STR4## in which R 1 , R 2 , R 5 and R 6 are independently H or an alkyl group containing 1-10 carbon atoms, R 4 is H or an alkyl group containing 1-10 carbon atoms, and R 3 and R 4 may represent a methylene group in combination thereof and the total number of carbon atoms is the range of 3-13, inclusive.
Claim 6
Dependent Claim
37 words
A polymer composition as defined in claim 4, wherein R 1 , R 2 and R 6 are CH 3 , R 3 and R 4 are H, and R 5 is H or CH 3 .
Claim 7
Dependent Claim
16 words
A polymer composition as defined in claim 1, wherein the essential monomer is said alkyl methacrylate.
Claim 8
Dependent Claim
15 words
A polymer composition as defined in claim 6, wherein said alkyl methacrylate is methyl methacrylate.
Claim 9
Dependent Claim
14 words
A polymer composition of claim 1, in which said base monomer ingredient is styrene.
Claim 10
Dependent Claim
21 words
A polymer composition of claim 1, in which said base monomer ingredient is a mixture of styrene and said alkyl methacrylate.
Claim 11
Dependent Claim
104 words
A process for producing an optically-transparent, neutron shielding polymer composition comprising polymerizing a base monomer containing as an essential mono-olefinic ingredient at least one monomer selected from the group consisting of (1) an alkyl methacrylate containing 1-4 carbon atoms in the alkyl group and (2) styrene in admixture with a boric acid ester of a polyol containing 3-16 carbon atoms and in which a molar ratio A of said polyol to boron atoms in said boric acid ester formed from said polyol being in the range of 0.6<A<4, the boron content B (wt%) in the total monomer mixture being in the range of 1≦B<6.
Claim 12
Dependent Claim
104 words
A process for producing an optically-transparent, neutron shielding polymer composition comprising polymerizing a base monomer containing as an essential mono-olefinic ingredient at least one monomer selected from the group consisting of (1) an alkyl methacrylate containing 1-4 carbon atoms in the alkyl group and (2) styrene in admixture with a boric acid ester of a polyol containing 3-16 carbon atoms and in which a molar ratio A of said polyol to boron atoms in said boric acid ester formed from said polyol being in the range of 0.6<A<4, the boron content B (wt%) in the total monomer mixture being in the range of 1≦B<6.
Claim 13
Dependent Claim
22 words
A process as defined in claim 10, wherein said polyol is one which has 2-3 alcoholic hydroxyl groups and 3-13 carbon atoms.
Claim 14
Dependent Claim
14 words
A process as defined in claim 11, wherein said polyol is an aliphatic polyol.
Claim 15
Dependent Claim
85 words
A process as defined in claim 12, wherein said polyol is a 1,3-glycol of the general formula (I) ##STR5## in which R 1 , R 2 , R 3 , R 5 and R 6 are independently H or an alkyl group containing 1-10 carbon atoms, R 4 is H or an alkyl group containing 1-10 carbon atoms, R 3 and R 4 may represent a methylene group in combination thereof, and the total number of carbon atoms is in the range of 3-13 inclusive.
Claim 16
Dependent Claim
36 words
A process as defined in claim 13, wherein R 1 , R 2 and R 6 are CH 3 , R 3 and R 4 are H, and R 5 is H or CH 3 .
Claim 17
Dependent Claim
30 words
A process as defined in claim 10, wherein the polymerization reaction is conducted at a temperature of 0° to 200° C. in the presence of an initiator for radical polymerization.
Claim 18
Dependent Claim
30 words
A process as defined in claim 15, wherein the polymerization reaction is conducted at a temperature of 20° to 180° C. in the presence of an initiator for radical polymerization.
Claim 19
Dependent Claim
15 words
A process as defined in claim 10, wherein the essential monomer is said alkyl methacrylate.
Claim 20
Dependent Claim
14 words
A process as defined in claim 17, wherein said alkyl methacrylate is methyl methacrylate.
Claim 21
Dependent Claim
13 words
A process of claim 10, in which said base monomer ingredient is styrene.
Claim 22
Dependent Claim
20 words
A process of claim 10, in which said base monomer ingredient is a mixture of styrene and said alkyl methacrylate.
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) | 1984-06-22 | 1984-12-22 | 1985-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-22 | 1988-12-22 | 1989-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-22 | 1992-12-22 | 1993-06-23 | $7700.00 | Window Closed / Lapsed |