Patent US4138300A successfully refreshed from Google Patents.
US4138300A
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Process for producing a transparent shaped polymeric product
Assignee: Japan Atomic Energy Agency
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Filing: 1976-03-24
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Granted: 1979-02-06
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Expires: 1996-03-24
Abstract
Abstract This invention provides a process for producing a transparent shaped polymeric product which is free from defects such as strain and bubbles and has improved chemical and physical properties. The product is produced from a methyl methacrylate- or methyl acrylate-based monomer mixture by cast polymerization for a significantly shortened time.
Inventors
- 👤 Isao Kaetsu
- 👤 Hiroshi Okubo
- 👤 Fumio Yoshii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:36
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/14; C08F220/16; C08F220/18; C08F220/1804; C08F220/26; C08F220/32; C08F220/325; Y; Y10; Y10S; Y10S522/00; Y10S522/911; Y10S522/912
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
189 words
A process for efficiently producing a transparent shaped polymeric product free from defects such as bubbles and strain, of sufficiently high physical properties, such as surface hardness, weather resistance and impact resistance, to serve as a substitute for inorganic glass, consisting essentially of the steps of: mixing (A) methyl methacrylate or its prepolymer, (B) a monomer represented by the formula ##STR6## wherein X is H or CH 3 , R is alkyl having 2-6 carbon atoms and n is an integer of from 3 to 7, a mixture of the monomers or a prepolymer thereof, and (C) a monomer represented by the formula ##STR7## wherein X is H or CH 3 and m is an integer of from 2 to 4, a mixture of the monomers, or a prepolymer thereof, the amount each of the components (A), (B) and (C) ranging from 20 to 50% by weight and the total amount of the components being 100% by weight; pouring the resulting mixture into a cell or mold for cast polymerization; and irradiating said mixture with light or ionizing radiation at a temperature below room temperature to polymerize said mixture.
Claim 2
Dependent Claim
189 words
A process for efficiently producing a transparent shaped polymeric product free from defects such as bubbles and strain, of sufficiently high physical properties, such as surface hardness, weather resistance and impact resistance, to serve as a substitute for inorganic glass, consisting essentially of the steps of: mixing (A) methyl methacrylate or its prepolymer, (B) a monomer represented by the formula ##STR6## wherein X is H or CH 3 , R is alkyl having 2-6 carbon atoms and n is an integer of from 3 to 7, a mixture of the monomers or a prepolymer thereof, and (C) a monomer represented by the formula ##STR7## wherein X is H or CH 3 and m is an integer of from 2 to 4, a mixture of the monomers, or a prepolymer thereof, the amount each of the components (A), (B) and (C) ranging from 20 to 50% by weight and the total amount of the components being 100% by weight; pouring the resulting mixture into a cell or mold for cast polymerization; and irradiating said mixture with light or ionizing radiation at a temperature below room temperature to polymerize said mixture.
Claim 3
Dependent Claim
33 words
A process according to claim 1 wherein said component (B) is a compound represented by the formula ##STR8## wherein X is H or CH 3 and R is alkyl having 4-6 carbon atoms.
Claim 4
Dependent Claim
35 words
A process according to claim 1 wherein said component (C) is a compound represented by the formula ##STR9## wherein X is H or CH 3 and m is an integer of from 2 to 4.
Claim 5
Dependent Claim
39 words
A process according to claim 1 wherein said irradiation is carried out with ionizing radiation at a dose rate of from 10 3 to 10 9 roentgen/hour with the total dose ranging from 10 3 to 10 7 roentgen.
Claim 6
Dependent Claim
39 words
A process according to claim 1 wherein said irradiation is carried out with ionizing radiation at a dose rate of from 10 4 to 10 7 roentgen/hour with the total dose ranging from 10 5 to 10 7 roentgen.
Claim 7
Dependent Claim
17 words
A process according to claim 1 wherein said irradiation is carried out with gamma-rays or electron beams.
Claim 8
Dependent Claim
22 words
A process according to claim 1 wherein said polymerization is carried out at a temperature of from 0° C. to -100° C.
Claim 9
Dependent Claim
21 words
A process according to claim 1 wherein said polymerization is carried out at a temperature of from -30° to -80° C.
Claim 10
Dependent Claim
60 words
A process according to claim 1 wherein a component (D) being a monomer copolymerizable with the components (A), (B) and (C) or a mixture of the monomers is added to the mixture of the components (A), (B) and (C) in an amount of less than 20% by weight based on the total amount of the components (A), (B) and (C).
Claim 11
Dependent Claim
107 words
A process according to claim 1 wherein a component (E) being one or more compounds represented by the formula ##STR10## wherein R 1 is --OH, --OR 4 or --OOCR 4 in which R 4 is alkyl having 1-20 carbon atoms; R 2 is straight or branched chain alkylene having 1-10 carbon atoms or ##STR11## wherein l is an integer of from 1 to 20 and R 3 is a trivalent carbyl radical having 1-20 carbon atoms is mixed with the components (A), (B) and (C) in an amount of from 3 to 30% by weight based on the total amount of the components (A), (B) and (C).
Claim 12
Dependent Claim
40 words
A process according to claim 10 wherein said component (E) is a compound represented by the formula R.sup.1 R.sup.2 OH wherein R 1 is --OH, --OR 4 or --OOCR 4 in which R 4 is alkyl having 1-20 carbon atoms.
Claim 13
Dependent Claim
109 words
A process according to claim 9 wherein a component (E) being one or more compounds represented by the formula ##STR12## wherein R 1 is --OH, --OR 4 or --OOCR 4 ; in which R 4 is alkyl having 1-20 carbon atoms; R 2 is straight or branched chain alkylene having 1-10 carbon atoms or ##STR13## wherein l is an integer of from 1 to 20 and R 3 is a trivalent carbyl radical having 1-20 carbon atoms is mixed with the components (A), (B), (C) and (D) in an amount of from 3 to 30% by weight based on the total amount of monomers (A), (B), (C) and (D).
Claim 14
Dependent Claim
54 words
A process according to claim 12 wherein said component (E) is a compound represented by the formula R.sup.1 R.sup.2 OH wherein R 1 is --OH, --OR 4 or --OOCR 4 in which R 4 is alkyl having 1-20 carbon atoms and R 2 is a straight or branched chain alkylene having 1-10 carbon atoms.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |