US4022960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers with high transparency and refractive index and process for production thereof
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1973-03-13
•
Granted: 1977-05-10
•
Expires: 1993-03-13
Abstract
Abstract Disclosed are polymers of metal salts of itaconic acid monoester and copolymers of the said metal salts with vinyl monomer, having excellent optical properties such as high refractive index and transparency. The polymers and copolymers are obtained by irradiating with radioactive rays a polymerizable ingredient which is one member selected from the group consisting of (1) one metal salt of itaconic acid monoester, (2) a mixture of two or more metal salts of itaconic acid monoester and (3) a mixture of at least one metal salt of itaconic acid monoester with vinyl monomer. Further, a polymerizable ingredient prepared by adding to the aforementioned polymerizable ingredient a polymerization catalyst is subjected to thermal treatment to produce a polymer.
Inventors
- 👤 Seiichi Mima
- 👤 Masaru Miya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
C; C08; C08F; C08F222/00; C08F222/10
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
79 words
A transparent crosslinked polymer having a high refractive index prepared from the monomer which comprises a metal salt of itaconic acid monoester, the said metal salt of itaconic acid monoester being represented by the generic formula: ##STR4## wherein, M is one member selected from the class consisting of Pb, Ba and La and R is one member selected from the class consisting of an alkyl group with 1 - 4 carbon atoms, an allyl group and a methallyl group.
Claim 2
Dependent Claim
79 words
A transparent crosslinked polymer having a high refractive index prepared from the monomer which comprises a metal salt of itaconic acid monoester, the said metal salt of itaconic acid monoester being represented by the generic formula: ##STR4## wherein, M is one member selected from the class consisting of Pb, Ba and La and R is one member selected from the class consisting of an alkyl group with 1 - 4 carbon atoms, an allyl group and a methallyl group.
Claim 3
Dependent Claim
81 words
A transparent crosslinked copolymer having a high refractive index prepared from at least one metal salt of itaconic acid monoester and a vinyl monomer, the said metal salt of itaconic acid monomer being represented by the generic formula: ##STR5## wherein, M is one member selected from the class consisting of Pb, Ba and La and R is one member selected from the class consisting of an alkyl group with 1 - 4 carbon atoms, an allyl group and a methallyl group.
Claim 4
Dependent Claim
81 words
A transparent crosslinked copolymer having a high refractive index prepared from at least one metal salt of itaconic acid monoester and a vinyl monomer, the said metal salt of itaconic acid monomer being represented by the generic formula: ##STR5## wherein, M is one member selected from the class consisting of Pb, Ba and La and R is one member selected from the class consisting of an alkyl group with 1 - 4 carbon atoms, an allyl group and a methallyl group.
Claim 5
Dependent Claim
28 words
A copolymer according to claim 2, wherein the vinyl monomer is at least one member selected from the class consisting of methyl methacrylate, styrene, and diallyl diglycol carbonate.
Claim 6
Dependent Claim
93 words
A process for the production of a novel transparent crosslinked polymer having a high refractive index, which comprises, preparing a polymerizable ingredient by incorporating a radical polymerization catalyst into one member selected from the group consisting of: 1. a metal salt of itaconic acid monoester represented by the generic formula: ##STR6## wherein, M is one member selected from the class consisting of Pb, Ba and La and R is one member selected from the class consisting of an alkyl group with 1 - 4 carbon atoms, an allyl group and a methallyl group.
Claim 7
Dependent Claim
93 words
A process for the production of a novel transparent crosslinked polymer having a high refractive index, which comprises, preparing a polymerizable ingredient by incorporating a radical polymerization catalyst into one member selected from the group consisting of: 1. a metal salt of itaconic acid monoester represented by the generic formula: ##STR6## wherein, M is one member selected from the class consisting of Pb, Ba and La and R is one member selected from the class consisting of an alkyl group with 1 - 4 carbon atoms, an allyl group and a methallyl group.
Claim 8
Dependent Claim
61 words
a mixture of at least two metal salts of itaconic acid monoester represented by the generic formula: ##STR7## wherein, M is one member selected from the class consisting of Pb, Ba and La and R is one member selected from the class consisting of an alkyl group with 1 - 4 carbon atoms, an allyl group and a methallyl group and
Claim 9
Dependent Claim
61 words
a mixture of at least two metal salts of itaconic acid monoester represented by the generic formula: ##STR7## wherein, M is one member selected from the class consisting of Pb, Ba and La and R is one member selected from the class consisting of an alkyl group with 1 - 4 carbon atoms, an allyl group and a methallyl group and
Claim 10
Dependent Claim
47 words
a mixture of at least one metal salt of itaconic acid monoester defined in (1) above with a vinyl monomer, blending the polymerizable ingredient, and thereafter heating the blended polymerizable mixture at temperatures in the range of from 40° to 120° C thereby solid polymerizing the ingredient.
Claim 11
Dependent Claim
47 words
a mixture of at least one metal salt of itaconic acid monoester defined in (1) above with a vinyl monomer, blending the polymerizable ingredient, and thereafter heating the blended polymerizable mixture at temperatures in the range of from 40° to 120° C thereby solid polymerizing the ingredient.
Claim 12
Dependent Claim
23 words
A process according to claim 4, wherein the radical polymerization catalyst is one member selected from the group consisting of peroxides and azobisisobutyronitrile.
Claim 13
Dependent Claim
33 words
A process according to claim 5, wherein the amount of the radical polymerization catalyst to be incorporated is in the range of from 0.01 to 3% by weight based on the polymerizable ingredient.
Claim 14
Dependent Claim
26 words
A process according to claim 4, wherein the vinyl monomer is one member selected from the group consisting of methyl methacrylate, styrene, and diallyl diglycol carbonate.
Claim 15
Dependent Claim
90 words
A process for the production of a novel transparent crosslinked polymer having a high refractive index, which comprises preparing a polymerizable ingredient using one member selected from the group consisting of: 1. at least one metal salt of itaconic acid monoester represented by the generic formula: ##STR8## wherein, M is one member selected from the class consisting of Pb, Ba and La and R is one member selected from the class consisting of an alkyl group with 1 - 4 carbon atoms, an allyl group and a methallyl group and
Claim 16
Dependent Claim
90 words
A process for the production of a novel transparent crosslinked polymer having a high refractive index, which comprises preparing a polymerizable ingredient using one member selected from the group consisting of: 1. at least one metal salt of itaconic acid monoester represented by the generic formula: ##STR8## wherein, M is one member selected from the class consisting of Pb, Ba and La and R is one member selected from the class consisting of an alkyl group with 1 - 4 carbon atoms, an allyl group and a methallyl group and
Claim 17
Dependent Claim
30 words
a mixture of the metal salt of itaconic acid monoester defined in (1) above with a vinyl monomer, and irradiating the polymerizable ingredience with radioactive rays thereby polymerizing the ingredient.
Claim 18
Dependent Claim
30 words
a mixture of the metal salt of itaconic acid monoester defined in (1) above with a vinyl monomer, and irradiating the polymerizable ingredience with radioactive rays thereby polymerizing the ingredient.
Claim 19
Dependent Claim
28 words
A process according to claim 8, wherein the radioactive rays are one member selected from the group consisting of gamma (γ) rays, beta (β) rays and neutron rays.
Claim 20
Dependent Claim
18 words
The transparent polymer of claim 1 having a refractive index in the range of from 1.5 to 1.6.
Claim 21
Dependent Claim
18 words
The transparent copolymer of claim 2 having a refractive index in the range of from 1.5 to 1.6.
Claim 22
Dependent Claim
22 words
The process of claim 4 wherein the solid polymerized ingredient has a refractive index in the range of from 1.5 to 1.6.
Claim 23
Dependent Claim
22 words
The process of claim 8 wherein the solid polymerized ingredient has a refractive index in the range of from 1.5 to 1.6.
References Cited (Backward Citations)
GB254668A
Cited
US2087999A
Cited
US2044968A
Cited
US2151432A
Cited
US2279882A
Cited
US2754280A
Cited
US2852495A
Cited
US2940957A
Cited
US3264272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |