US4246374A
Expired / Lapsed
US
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Imidized acrylic polymers
Assignee: Rohm and Haas Co
•
Filing: 1979-04-23
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Granted: 1981-01-20
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Expires: 1999-04-23
Abstract
Abstract Polymers containing imide units and a process of imidizing acrylic polymers to any desired degree of imidization without the use of added water or solvent.
Inventors
- 👤 Richard M. Kopchik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:36
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
48 words
Method for producing a polymer containing imide units comprising reacting under substantially anhydrous conditions in an extruder an acrylic polymer with ammonia or a primary amine at a temperature of about 200° to 450° C. while applying subatmospheric pressure to at least one vent port of said extruder.
Claim 2
Dependent Claim
48 words
Method for producing a polymer containing imide units comprising reacting under substantially anhydrous conditions in an extruder an acrylic polymer with ammonia or a primary amine at a temperature of about 200° to 450° C. while applying subatmospheric pressure to at least one vent port of said extruder.
Claim 3
Dependent Claim
27 words
Method of claim 1, wherein said anhydrous ammonia or primary amine is introduced through an extruder addition port at a pressure of about atmospheric to 1000 atmospheres.
Claim 4
Dependent Claim
14 words
Method of claim 1, wherein the average residence time is 0.1 to 1000 seconds.
Claim 5
Dependent Claim
20 words
Method of claim 1, wherein the degree of imidization is controlled by control of the average residence time and temperature.
Claim 6
Dependent Claim
13 words
Method of claim 1, wherein the temperature is about 300° to 375° C.
Claim 7
Dependent Claim
16 words
Method of claim 1, further characterized as being carried out in the absence of a solvent.
Claim 8
Dependent Claim
15 words
Method of claim 1, further characterized as carried out in the absence of a catalyst.
Claim 9
Dependent Claim
70 words
Method of claim 1, wherein anhydrous ammonia is introduced through an extruder addition port at a pressure of about atmospheric to 500 atmospheres, the average residence time is maintained at 30 to 300 seconds, a partial pressure of about 0.9 to 0.01 is applied to at least one vent port, the temperature is maintained at about 325° to 375° C., and the reaction is conducted in the absence of solvent.
Claim 10
Dependent Claim
20 words
Method of claim 1, wherein a partial pressure of about 0.9 to 0.01 atmospheres is applied to said vent port.
Claim 11
Dependent Claim
15 words
Composition comprising the polymer product containing imide units produced by the method of claim 1.
Claim 12
Dependent Claim
18 words
The composition of claim 10 in the form of a sheet, rod, tube, powder, granule, or molded article.
Claim 13
Dependent Claim
25 words
The composition of claim 10, wherein the polymer comprises a multiple stage polymer containing imide units in the outer stage of said multiple stage polymer.
Claim 14
Dependent Claim
45 words
The composition of claim 10, wherein the acrylic polymer is a blend of single stage and multiple stage polymers, and the polymer containing imide units is a blend of a single stage polymer and a multiple stage polymer containing imide units in the outer stage.
Claim 15
Dependent Claim
22 words
The composition of claim 13, wherein the multi-stage polymer containing imide units comprises about 10 to 60% by weight of the blend.
Claim 16
Dependent Claim
22 words
The composition of claim 10, wherein the polymer containing imide units has an intrinsic viscosity, [η] DMF, of about 0.01 to 7.0.
Claim 17
Dependent Claim
31 words
The composition of claim 10, wherein the polymer containing imide units further contains acrylic units and the numerical ratio of imide units to acrylic units is about 1:2 to about 9:1.
Claim 18
Dependent Claim
15 words
The composition of claim 10, wherein 95 to 100% of the polymer units are imide.
Claim 19
Dependent Claim
15 words
The composition of claim 10, wherein 1 to 35% of the polymer units are imide.
Claim 20
Dependent Claim
10 words
The composition of claim 10 further including an impact modifier.
Claim 21
Dependent Claim
13 words
The composition of claim 19, wherein impact modifier is a multiple stage polymer.
Claim 22
Dependent Claim
20 words
The composition of claim 20, wherein the impact modifier selected from the group consisting of MBS, ABS, and all acrylic.
Claim 23
Dependent Claim
35 words
Method of claim 1 wherein the ammonia or primary amine is introduced in the extruder barrel so that it contacts and mixes with the polymer as it moves forward through the reaction zone under pressure.
Claim 24
Dependent Claim
21 words
Method of claim 1 wherein the vapor stream of the ammonia or primary amine is added countercurrently to the polymer stream.
Claim 25
Dependent Claim
91 words
Compositions comprising a thermoplastic polymer having good thermal stability and melt flow properties containing at least 10% imide units of the structural formula ##STR4## wherein R 1 , R 2 , and R 3 independently represent hydrogen or C 1 to C 20 unsubstituted or substituted alkyl, aryl, or mixtures thereof, said polymer being non-crosslinked and soluble in dimethyl formamide, and having a degree of thermal stability as measured by TGA in an air atmosphere wherein the temperature at which said polymer has a 1% decomposition of at least 285° C.
Claim 26
Dependent Claim
91 words
Compositions comprising a thermoplastic polymer having good thermal stability and melt flow properties containing at least 10% imide units of the structural formula ##STR4## wherein R 1 , R 2 , and R 3 independently represent hydrogen or C 1 to C 20 unsubstituted or substituted alkyl, aryl, or mixtures thereof, said polymer being non-crosslinked and soluble in dimethyl formamide, and having a degree of thermal stability as measured by TGA in an air atmosphere wherein the temperature at which said polymer has a 1% decomposition of at least 285° C.
Claim 27
Dependent Claim
10 words
The composition of claim 24 further including an impact modifier.
Claim 28
Dependent Claim
14 words
The composition of claim 25, wherein said impact modifier is a multiple stage polymer.
Claim 29
Dependent Claim
21 words
The composition of claim 26, wherein the impact modifier is selected from the group consisting of MBS, ABS, and all acrylic.
Claim 30
Dependent Claim
24 words
The composition of claim 24 wherein the thermoplastic polymer is a multiple stage polymer containing units of said structural formula in the outer stage.
Claim 31
Dependent Claim
37 words
The composition of claim 24 comprising a blend of a single stage thermoplastic polymer containing imide units of said structural formula and a multiple stage polymer containing imide units of said structural formula in the outer stage.
Claim 32
Dependent Claim
19 words
The composition of claim 29, wherein the multistage polymer comprises about 10 to 60% by weight of the blend.
Claim 33
Dependent Claim
17 words
The composition of claim 24, wherein said thermoplastic polymer further includes units from other ethylenically unsaturated monomers.
Claim 34
Dependent Claim
21 words
The composition of claim 24, wherein said thermoplastic polymer has an intrinsic viscosity, [η] DMF , of about 0.1 to 7.0.
Claim 35
Dependent Claim
14 words
The composition of claim 24, further characterized as soluble in tetrahydrofuran and dimethyl sulfoxide.
Claim 36
Dependent Claim
17 words
The composition of claim 24, in the form of sheet, rod, tube, powder, granule or molded article.
Claim 37
Dependent Claim
31 words
The composition of claim 24, wherein the polymer containing imide units further contain acrylic units and the numerical ratio of imide units to acrylic units is about 1:2 to about 9:1.
Claim 38
Dependent Claim
15 words
The composition of claim 24, wherein 95% to 100% of the polymer units are imide.
Claim 39
Dependent Claim
15 words
The composition of claim 24, wherein 10 to 35% of the polymer units are imide.
Claim 40
Dependent Claim
16 words
Composition of claim 24 wherein said degree of thermal stability is at least about 365° C.
Claim 41
Dependent Claim
32 words
Composition of claim 24 wherein said polymer is the reaction product of ammonia or a primary amine with an acrylic polymer containing units derived from esters of acrylic acid or methacrylic acid.
Claim 42
Dependent Claim
16 words
Composition of claim 39 wherein said degree of thermal stability is at least about 365° C.
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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) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |