US4337327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel block copolymers including acrylonitrile sequences and sequences including units derived from glutarimide units and processes for preparing same
Assignee: SKY POLYMERS PL A OF LP
•
Filing: 1980-09-17
•
Granted: 1982-06-29
•
Expires: 2000-09-17
Abstract
Abstract There is disclosed novel block copolymers formed of acrylonitrile sequences and sequences containing at least about 50 mole percent of acrylamide units and at most about 50 of units selected from the group consisting of carboxyl, ester, amide, hydrazide and hydroxylamide units and formed by reacting a block copolymer having acrylonitrile sequences and sequences of glutarimide units with a low molecular weight compound having a functional group selected from the group consisting of hydroxyl, primary amino, secondary amino, hydrazo and hydroxylamino group. The reaction is effected at a pH of about 7.5 and higher, preferably in the presence of a solvent and/or swelling agent.
Inventors
- 👤 Vladimir A. Stoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:46
CPC Classifications
C; C08; C08F; C08F293/00; C08F8/00; Y; Y10; Y10S; Y10S524/00; Y10S524/916
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
77 words
A novel block copolymer of a molecular weight of from 10,000 to 2,000,000 comprised of acrylonitrile sequences and sequences comprised of at least about 50 mole percent acrylamide units and functional units derived from glutarimide units and selected from the group consisting of carboxyl ester, hydrazide and hydroxylamide units, said acrylomile sequences having a molecular weight of at least 400, said sequence of said acrylamide and said functional units having a molecular weight of at least 400.
Claim 2
Dependent Claim
77 words
A novel block copolymer of a molecular weight of from 10,000 to 2,000,000 comprised of acrylonitrile sequences and sequences comprised of at least about 50 mole percent acrylamide units and functional units derived from glutarimide units and selected from the group consisting of carboxyl ester, hydrazide and hydroxylamide units, said acrylomile sequences having a molecular weight of at least 400, said sequence of said acrylamide and said functional units having a molecular weight of at least 400.
Claim 3
Dependent Claim
17 words
The block copolymers as defined in claim 1 wherein said molecular weight is from 40,000 to 550,000.
Claim 4
Dependent Claim
43 words
The block copolymer as defined in claim 1 or 2 wherein said molecular weight of said acrylonitrile sequences is preferably at least 600 and said molecular weight of said sequences comprised of acrylamide units and said functional units is preferably at least 750.
Claim 5
Dependent Claim
31 words
The block copolymer as defined in claim 3 wherein there are at least two acrylonitrile sequences and at least two of the sequences comprised of acrylamide units and said functional units.
Claim 6
Dependent Claim
16 words
The block copolymer as defined in claim 4 wherein there are preferably at least five sequences.
Claim 7
Dependent Claim
25 words
The block copolymer as defined in claims 4 or 5 wherein said acrylonitrile sequences equal the sequences comprised of acrylamide units and said functional units.
Claim 8
Dependent Claim
25 words
The block copolymer as defined in claims 1 or 2 wherein said acrylonitrile sequences comprises from 1 to 99 mole percent of said block copolymer.
Claim 9
Dependent Claim
23 words
The block copolymer as defined in claim 7 wherein said acrylonitrile sequences comprises from 50 to 95 mole percent of said block copolymer.
Claim 10
Dependent Claim
24 words
The block copolymer as defined in claim 7 wherein said acrylonitrile sequences comprises from 1 to 50 mole percent of said block copolymer composition.
Claim 11
Dependent Claim
155 words
A process for producing a block copolymer comprised of acrylonitrile sequences and sequences comprised of at least about 50 mole percent acrylamide units and up to 50 mole percent of units selected from the group consisting of carboxyl, ester, amide, hydrazide and hydroxylamide units, which comprises: (a) contacting a block copolymer comprised of acrylonitrile and glutarimide sequences with a low molecular weight compound having a functional group selected from the group consisting of hydroxyl, primary amino, secondary amino, hydrazo and hydroxylamino group at a pH acid of at least about 7.5 and at a temperature of between 0° and 185° C. for a time sufficient to effect conversion of said glutarimide units; and (b) recovering said block copolymer comprised of acrylonitrile sequences and sequences comprised of at least about 50 mole percent acrylamide units and up to 50 mole percent of units selected from the group consisting of carboxyl, ester, amide, hydrazide and hydroxylamide units.
Claim 12
Dependent Claim
155 words
A process for producing a block copolymer comprised of acrylonitrile sequences and sequences comprised of at least about 50 mole percent acrylamide units and up to 50 mole percent of units selected from the group consisting of carboxyl, ester, amide, hydrazide and hydroxylamide units, which comprises: (a) contacting a block copolymer comprised of acrylonitrile and glutarimide sequences with a low molecular weight compound having a functional group selected from the group consisting of hydroxyl, primary amino, secondary amino, hydrazo and hydroxylamino group at a pH acid of at least about 7.5 and at a temperature of between 0° and 185° C. for a time sufficient to effect conversion of said glutarimide units; and (b) recovering said block copolymer comprised of acrylonitrile sequences and sequences comprised of at least about 50 mole percent acrylamide units and up to 50 mole percent of units selected from the group consisting of carboxyl, ester, amide, hydrazide and hydroxylamide units.
Claim 13
Dependent Claim
27 words
The process for forming the block copolymer as defined in claim 10 wherein step (a) is preferably effected at a temperature of from 15° to 65° C.
Claim 14
Dependent Claim
26 words
The process for forming the block copolymer as defined in claim 10 wherein said block copolymer comprised of acrylonitrile and glutarimide sequences includes acrylic acid units.
Claim 15
Dependent Claim
18 words
The process as defined in claim 10 wherein said block copolymer of step (b) is recovered by evaporation.
Claim 16
Dependent Claim
18 words
The process as defined in claim 10 wherein said block copolymer of step (b) is recovered by neutralization.
Claim 17
Dependent Claim
28 words
The process as defined in claim 10 wherein said block copolymer of step (b) is recovered by extraction with a liquid in which said block copolymer is immiscible.
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) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |