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Patent US3692870A successfully refreshed from Google Patents.
US3692870A
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New polymeric thermoplastic compounds derived from substantially linear polycarbonates and process for the production thereof
Assignee: Bayer AG
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Filing: 1970-11-17
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Granted: 1972-09-19
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Expires: 1990-11-17
Abstract
Abstract New polymeric thermoplastic compounds having favorable properties are obtained by reacting substantially linear polycarbonates containing polymerizable unsaturated groups dissolved in inert solvents or dispersed in nonsolvents with radical-polymerizable olefins or derivatives thereof or mixtures thereof under polymerization conditions.
Inventors
- 👤 Hermann Schnell
- 👤 Manfred Cziesla
- 👤 Ludwig Bottenbruch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:35
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01; C08G; C08G64/00; C08G64/04; C08G64/045
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
23 words
The high molecular weight polymer of Claim 1 wherein the polycarbonate polymer contains radicals of vinyl or Beta -alkenyl esters of bis(hydroxyphenyl)alkanoic acids.
Claim 2
Dependent Claim
42 words
The high molecular weight polymer of claim 1 wherein the polycarbonate polymer contains less than 50 mol per cent of radicals of dihydroxy compounds containing the unsaturated groups based on the total of the radicals of the dihydroxy compounds in the polycarbonate.
Claim 3
Dependent Claim
43 words
The high molecular weight polymer of claim 3 wherein the polycarbonate polymer contains less than 15 mol per cent of the radicals of dihydroxy compounds containing the unsaturated groups based on the total of the radicals of the dihydroxy compounds in the polycarbonate.
Claim 4
Dependent Claim
16 words
The high molecular weight polymer of claim 1 wherein the graft polymerization product contains polyvinyl chains.
Claim 5
Dependent Claim
16 words
The high molecular weight polymer of claim 5 wherein the graft polymerization product contains polystyrene chains.
Claim 6
Dependent Claim
24 words
The high molecular weight polymer of claim 1 wherein the average molecular weight of the polycarbonate polymer is form about 5,000 to about 1000,000.
Claim 7
Dependent Claim
24 words
The high molecular weight polymer of claim 1 wherein the average molecular weight of the polycarbonate polymer is from about 10,000 to about 70,000.
Claim 8
Dependent Claim
28 words
The high molecular weight polymer of claim 1 wherein the average molecular of the graft polymerized chain of the vinyl monomer is from about 1,000 to about 100,000.
Claim 9
Dependent Claim
28 words
The high molecular weight polymer of claim 1 wherein the average molecular weight of the graft polymerized chain of vinyl monomer is fRom about 5,000 to about 50,000.
Claim 10
Dependent Claim
16 words
The high molecular weight polymer of claim 1 wherein the polycarbonate polymer contains Beta -alkenyl radicals.
Claim 11
Dependent Claim
19 words
The high molecular weight polymer of claim 1 wherein the polycarbonate polymer contains repeating radicals derived from 2, 2-(3,3''-diallyl-4,4''-dihydroxydiphenyl)propane.
Claim 12
Dependent Claim
16 words
The high molecular weight polymer of claim 1 wherein the b-alkenyl group contains three carbon atoms.
Claim 13
Dependent Claim
16 words
The high molecular weight polymer of claim 1 wherein the b-alkenyl group contains four carbon atoms.
Claim 14
Dependent Claim
88 words
A process for the production of high molecular weight branched thermoplastic polymers having a solubility of 10 g in 100 g methylene chloride at a temperature of 25* C which comprises reacting the polymerizable groups of a linear polycarbonate polymer containing Beta -alkenyl radicals, Beta -alkenyl carboxylate radicals or the radicals of vinyl or Beta -alkenyl esters of bis(hydroxyphenyl)alkanoic acids as unsaturated polymerizable groups with a vinyl monomer under graft polymerization conditions while the polycarbonate polymer is dissolved in an inert solvent or dispersed in a non-solvent therefor.
Claim 15
Dependent Claim
20 words
The process of claim 15 wherein the polycarbonate polymer contains radicals of vinyl or Beta -alkenyl esters of bis-(hydroxyphenyl)alkanoic acids.
Claim 16
Dependent Claim
40 words
The process of claim 15 wherein the polycarbonate polymer contains less than 50 mol per cent of radicals of dihydroxy cmpounds containing the unsaturated polymerizable groups based on the total of the radicals of the dihydroxy compounds in the polycarbonate.
Claim 17
Dependent Claim
40 words
The process of claim 15 wherein the polycarbonate polymer contains less than 15 mol per cent of radicals of dihydroxy compounds containing the unsaturated polymerizable groups based on the total of the radicals of the dihydroxy compounds in the polycarbonate.
Claim 18
Dependent Claim
19 words
The process of claim 15 wherein the polymerizable groups of the polycarbonate polymer are reacted with a vinyl monomer.
Claim 19
Dependent Claim
24 words
The process of claim 15 wherein the polycarbonate polymer contains radicals derived by the removal of the hydroxyl hydrogen from b-alkenyl substituted dihydric phenols.
Claim 20
Dependent Claim
22 words
The process of claim 15 wherein the polycarbonate polymer contains repeating radicals derived by the removal of the hydroxyl hydrogen from 2,2-(3,3''-diallyl-4,4''-dihydroxydiphenyl)propane.
Claim 21
Dependent Claim
19 words
The process of claim 15 wherein the polymerization is initiated by the addition of a free radical forming catalyst.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |