CA1163739A - Process for producing a polymerized, heat-resistant lacquer - Google Patents
Process for producing a polymerized, heat-resistant lacquerInfo
- Publication number
- CA1163739A CA1163739A CA000380782A CA380782A CA1163739A CA 1163739 A CA1163739 A CA 1163739A CA 000380782 A CA000380782 A CA 000380782A CA 380782 A CA380782 A CA 380782A CA 1163739 A CA1163739 A CA 1163739A
- Authority
- CA
- Canada
- Prior art keywords
- per cent
- accordance
- copolymerizate
- kneading
- lacquer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
- B41M5/245—Electroerosion or spark recording
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
- C09D101/08—Cellulose derivatives
- C09D101/10—Esters of organic acids
- C09D101/12—Cellulose acetate
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A B S T R A C T
After having been pretreated by kneading at its softening temperature, a cellulose acetate is subjected to block polymerization by being kneaded with, for example, an ethylene vinyl acetate copolymerizate, at its mean softening temperature. If necessary, the block copolymerizate may be subsequently cross-linked by adding a peroxide.
After having been pretreated by kneading at its softening temperature, a cellulose acetate is subjected to block polymerization by being kneaded with, for example, an ethylene vinyl acetate copolymerizate, at its mean softening temperature. If necessary, the block copolymerizate may be subsequently cross-linked by adding a peroxide.
Description
Process for producing a polymerized, heat-resistant lacquer The invention concerns a novel process for producing a polymeriæed, heat-resistant, cellulose acetate based lacquer with a high carbon black compatibility and a high pigment absorption for record carriers coated with aluminium, as are used, for example, for electroerosion printers.
For coating record carriers, both nitrocellulose lacquers and cellulose acetate lacquers have been used so far. Nitrocellulose lacquers have proved to be little temperature-resistant leading to the print electrodes being covered with a tough to firm cake of combustion products, such as lacquer pyrolizate, moisture, and dust, so that they failed after some time. In the presence of such hard pigments in the lacquer it is also possible for the lacquer to be subject to automatic erosion in the area of the pigment grains, so that the latter are torn from the lacquer film, rolling under the print electrodes on the lacquer surface and interrupting the print process. Of the cellulose acetate lacquers only the following lacquers are suitable for such record carriers:
a) Cellulose propionates.
These lacquers have a moderate thermal stability with a relatively high softening point of about 200 C to 220 C but a poor carbon black compatibility and a low filler absorption, thus being little suited for pigmentation.
b) Cellulose acetate butyrates.
Cellulose acetate butyrates (CAB) with a butyryl content of about 38 per cent (dibutyrate) have a melting point of 160 C to 180 C, a good carbon black and pigment compatibility and a good film elasticity.
1 ~63739 Cellulose acetate butyrates with a butyryl content of 15 percent to 17 percent (monobutyrates) have a high thermal stability. An advantage is that the melting point and the decomposition point practically coincide [220C to 240C~.
However, as the molecular weight decreases, there is also a drop in the melting point of the monobutyrates. The disadvantage of this polymer is its poor adhesion to paper in conjunction with carbon black and its low pigment absorption.
c) Pure cellulose lacquers.
These lacquers have the highest temperature resistance of the cellulose acetate lacquers and a melting and decomposition point of 240C. However, as lacquers for record carriers, they are even less suited than the above-mentioned monobutyrates.
The brittleness of cellulose acetate lacquers can be reduced by the addition of plasticisers and by a low molecular weight, but this simultaneously leads to a reduction in their temperature resistance. Even the use of phosphoric acid esters which are not easily inflammable does not improve the temperature resistance of such lacquers. After differently long printing periods, all of these lacquers lead to the feared caking, i.e., the occurrence of hard layers on the print electrodes, as described above.
As for cellulose based lacquers, such lacquers are for technical and economic reasons superior to the other lacquers used for the production of record carriers.
It is the object of the invention to provide a high temperature resistant lacquer, which has a high carbon black compatibility and a high pigment absorption, and which also has a high elasticity and a good adhesion to paper and aluminum. Such a temperature-resistant polymer can be produced in accordance with the invention in that, initially, the higher melting polymer is homogenized by kneading at softening temperature, whereby the quantity of plasticer added is such that the mechanical energy of the kneading process is still transferred in full to the polymer, that, 1 1~373~
subsequently, the lower melting polymer is added and this mixture is kneaded up to homogenization at about the mean softening temperature, and that the copolymerizate thus obtained is processed to form a lacquer, adding pigments, if required.
In this context the term "cellulose acetate" is to cover all cellulose acetates on the one hand and cellulose acetate monobutyrates and cellulose acetate propionates on the other.
The procedure preferably adopted is such that solvent-free cellulose acetate and high-polymer solvent-free ethylene vinyl acetate copolymerizate are processed in a kneader by kneading at about the mean softening temperature to form a copolymerizate. It is particularly advantageous for the cellulose acetate/polyvinyl acetate copolymerizate thus obtained to be pigmented in a 5 per cent to 20 per cent solution in higher ketones or esters with 3 per cent to 4 per cent carbon black and, depending upon the degree of pol~ymeriz~tion, to be mixed with 0.5 per cent to 5 per cent of a phosphoric acid ester as a plasticer.
As in this case radical polymerization is concerned, the actual polymer-ization process is initiated and kept going by kneading a mixture of 50 per cent to 90 per cent of the cellulose acetate with 50 per cent to 10 per cent of the polyvinyl acetate or of the ethylene vinyl acetate copolymer-izate, whereby kneading tears the lony molecule chains, thus producing the radicals necessary for polymerization. At temperatures above 95 C bloc'.i polymerization predominates but must not exceed a moderate degree to retain the positive lacquer characteristics, such as elasticity, good solubilitv, etc., and to raise the decomposition and melting temperature. The degree of subsequent cross-linkage is determined by the addition of peroxides.
Therefore, it is advantageous for the mean molecular weight of the copolymerizate to be reduced by further cold kneading or mastication to such a degree that the viscosity and solubility required are obtained.
From this polymer the actual lacquer is subsequently produced as follows.
The cellulose acetate polyvinyl acetate copolymerizate and the copolymer-izate obtained from the ethylene vinyl acetate copolymerizate, respect-1~373~
ively, is pigmented as a 5 percellt to 20 percent solution inhigher ketones or esters with 3 percent to 4 percent carbon black and, depending upon the degree of polymerization of the copolymeri~ate, is mixed with 0.5 percent to 5 percent of a phosphoric ester as a plasticer. For this purpose, a phosphoric acide cresol ester is preferably used.
The electrode wear is at its lowest with purely carbon black pigmented lacquers.
With lacquers pigmented in another manner it is advantageous to retain at least 1 percent carbon black in the lacquer.
For this purpose, about 5 percent to 20 percent of an anorganic pigment, e.g., calcium carbonate, can be added.
To make up for the missing blackening and covering power of carbon black, several percent bitumen or coal tar pitch are preferably added. Black organic dyestuffs are also suitable for this purpose. Finally, it is pointed out that all details refer to the liquid finished lacquer.
The process in accordance with the invention will be described in detail below by means of several tests carried out and the results obtained.
As starting materials the following polymers were used:
1. A cellulose acetate butyrate with a viscosity of a 20 percent solution in acetone ethanol 9 : 1 measured at 23C
from 2500 to 4600 mPa.s and a butyryl content of 15 percent and a softening temperature of 220C as well as a molecular weight of about 40 000,
For coating record carriers, both nitrocellulose lacquers and cellulose acetate lacquers have been used so far. Nitrocellulose lacquers have proved to be little temperature-resistant leading to the print electrodes being covered with a tough to firm cake of combustion products, such as lacquer pyrolizate, moisture, and dust, so that they failed after some time. In the presence of such hard pigments in the lacquer it is also possible for the lacquer to be subject to automatic erosion in the area of the pigment grains, so that the latter are torn from the lacquer film, rolling under the print electrodes on the lacquer surface and interrupting the print process. Of the cellulose acetate lacquers only the following lacquers are suitable for such record carriers:
a) Cellulose propionates.
These lacquers have a moderate thermal stability with a relatively high softening point of about 200 C to 220 C but a poor carbon black compatibility and a low filler absorption, thus being little suited for pigmentation.
b) Cellulose acetate butyrates.
Cellulose acetate butyrates (CAB) with a butyryl content of about 38 per cent (dibutyrate) have a melting point of 160 C to 180 C, a good carbon black and pigment compatibility and a good film elasticity.
1 ~63739 Cellulose acetate butyrates with a butyryl content of 15 percent to 17 percent (monobutyrates) have a high thermal stability. An advantage is that the melting point and the decomposition point practically coincide [220C to 240C~.
However, as the molecular weight decreases, there is also a drop in the melting point of the monobutyrates. The disadvantage of this polymer is its poor adhesion to paper in conjunction with carbon black and its low pigment absorption.
c) Pure cellulose lacquers.
These lacquers have the highest temperature resistance of the cellulose acetate lacquers and a melting and decomposition point of 240C. However, as lacquers for record carriers, they are even less suited than the above-mentioned monobutyrates.
The brittleness of cellulose acetate lacquers can be reduced by the addition of plasticisers and by a low molecular weight, but this simultaneously leads to a reduction in their temperature resistance. Even the use of phosphoric acid esters which are not easily inflammable does not improve the temperature resistance of such lacquers. After differently long printing periods, all of these lacquers lead to the feared caking, i.e., the occurrence of hard layers on the print electrodes, as described above.
As for cellulose based lacquers, such lacquers are for technical and economic reasons superior to the other lacquers used for the production of record carriers.
It is the object of the invention to provide a high temperature resistant lacquer, which has a high carbon black compatibility and a high pigment absorption, and which also has a high elasticity and a good adhesion to paper and aluminum. Such a temperature-resistant polymer can be produced in accordance with the invention in that, initially, the higher melting polymer is homogenized by kneading at softening temperature, whereby the quantity of plasticer added is such that the mechanical energy of the kneading process is still transferred in full to the polymer, that, 1 1~373~
subsequently, the lower melting polymer is added and this mixture is kneaded up to homogenization at about the mean softening temperature, and that the copolymerizate thus obtained is processed to form a lacquer, adding pigments, if required.
In this context the term "cellulose acetate" is to cover all cellulose acetates on the one hand and cellulose acetate monobutyrates and cellulose acetate propionates on the other.
The procedure preferably adopted is such that solvent-free cellulose acetate and high-polymer solvent-free ethylene vinyl acetate copolymerizate are processed in a kneader by kneading at about the mean softening temperature to form a copolymerizate. It is particularly advantageous for the cellulose acetate/polyvinyl acetate copolymerizate thus obtained to be pigmented in a 5 per cent to 20 per cent solution in higher ketones or esters with 3 per cent to 4 per cent carbon black and, depending upon the degree of pol~ymeriz~tion, to be mixed with 0.5 per cent to 5 per cent of a phosphoric acid ester as a plasticer.
As in this case radical polymerization is concerned, the actual polymer-ization process is initiated and kept going by kneading a mixture of 50 per cent to 90 per cent of the cellulose acetate with 50 per cent to 10 per cent of the polyvinyl acetate or of the ethylene vinyl acetate copolymer-izate, whereby kneading tears the lony molecule chains, thus producing the radicals necessary for polymerization. At temperatures above 95 C bloc'.i polymerization predominates but must not exceed a moderate degree to retain the positive lacquer characteristics, such as elasticity, good solubilitv, etc., and to raise the decomposition and melting temperature. The degree of subsequent cross-linkage is determined by the addition of peroxides.
Therefore, it is advantageous for the mean molecular weight of the copolymerizate to be reduced by further cold kneading or mastication to such a degree that the viscosity and solubility required are obtained.
From this polymer the actual lacquer is subsequently produced as follows.
The cellulose acetate polyvinyl acetate copolymerizate and the copolymer-izate obtained from the ethylene vinyl acetate copolymerizate, respect-1~373~
ively, is pigmented as a 5 percellt to 20 percent solution inhigher ketones or esters with 3 percent to 4 percent carbon black and, depending upon the degree of polymerization of the copolymeri~ate, is mixed with 0.5 percent to 5 percent of a phosphoric ester as a plasticer. For this purpose, a phosphoric acide cresol ester is preferably used.
The electrode wear is at its lowest with purely carbon black pigmented lacquers.
With lacquers pigmented in another manner it is advantageous to retain at least 1 percent carbon black in the lacquer.
For this purpose, about 5 percent to 20 percent of an anorganic pigment, e.g., calcium carbonate, can be added.
To make up for the missing blackening and covering power of carbon black, several percent bitumen or coal tar pitch are preferably added. Black organic dyestuffs are also suitable for this purpose. Finally, it is pointed out that all details refer to the liquid finished lacquer.
The process in accordance with the invention will be described in detail below by means of several tests carried out and the results obtained.
As starting materials the following polymers were used:
1. A cellulose acetate butyrate with a viscosity of a 20 percent solution in acetone ethanol 9 : 1 measured at 23C
from 2500 to 4600 mPa.s and a butyryl content of 15 percent and a softening temperature of 220C as well as a molecular weight of about 40 000,
2. a cellulose acetate butyrate with a viscosity of 10 000 to 15 000 mPa.s, a butyryl content of 16.5 percent, a softening temperature of 240C, and a molecular weight of about 55 000,
3. an ethylene vinyl acetate copolymerizate with a vinyl acetate content of 60 percent, a Mooney viscosity ML4 at 100C of 40 + 5,
4. an ethylene vinyl acetate copolymerizate with a vinyl acetate content of 70 percent and a Mooney viscosity ML4 at 100C of 60 + 5,
5. polyvinyl acetate with a viscosity of a 10 percent ethyl acetate solution of 700 mPa.s and a softening temperature of 200C as well as a molecular weight of 1 100 000.
X GE9-~0-025 1 ~637~9 With these materials the following tests were carried out.
Tc5t lio. 1:
lo an oil-heated kneader with a capacity of 1 liter 480 g of a cellulose monobutyrate were added in portions and heated up to the softening temperature of 220 C. At the same time, 60 g of a plasticer were added in portions, taking care that the softness of the mixture is such that the mechanical energy of the kneader is still transferred to the polyrer.
Energy transfer is prevented if the quantity of plasticer added or the temperature used for kneading is too high. This adversely affects the 0 number of radicals which are required and available for subsequent block polymerization and which are obtained by tearing the molecule chains. The polymer was kneaded for about 15 minutes until the mass had a silky appearance and all grains or inhomogeneities had disappeared.
Subsequently, about 110 g of an ethylene vinyl acetate copolymer of no. 4 were added and kneading continued for another 20 minutes until the corJol-~nerizate obtained during that process was completely homogeneous.
Tests have shown that the copolymerizate thus obtained is a block polymer-izate. After 24 hours, the polymer product was dissolved in ethyl acetate (10 per cent solution) and lcft for two days. During that time the unreacted polymer parts collected at the top as a turbid layer. The clear, pure copolymer solution was drained off mixed with 3 per cent carbon black and 5 per cent CaC03, and processed by meanâ of a stirrer to form a lacquer. A comparison with a pure cellulose acetate butyrate lacquer showed a noticeably reduced shrinkage of the new lacquer, which ~mongst other characteristics is indicative of an improved pigment compatibility.
~dhesion was improved, too. The new polymer has also a much ilighcr hardness.
Test No. 2:
This test was carried out in the same manner as test no. 1. The cellulose acetate butyrate no. 2 was homogenized in a kneader at 2~0 C and mixed with 110 g polyvinyl acetate of the starting material no. 5. The total kneading period was 45 minutes, then the mixture was cooled to about 150 C, and kneading continued until a coarse-grained granular material had been obtained. The pure copolymer has a high hardness, a good solubility in ethyl acetate, and good film formin~ properties. The lacuer ~roduced therefron has a very good adhesion to paper and very little shrinkage even without the addition of a plasticer.
Test No. 3:
560 g of the starting material no. 2 were homogenized by kneading at 240 C
and mixed with 110 g of the starting material no. 3, and copolymerized in accordance with the same process as in test no. 1. After about ~5 minutes kneading was completed.
During this test only very little copolyrner was obtained after dissolut on in ethyl acetate after 48 hours. A longer reaction period would lead to a higher yield, particularly if the subsequent cross-linkage is effected by means of a sufficiently temperature stable (200 - 220 C) orsanic peroxide. It is also possible to obtain a higher yield by adding the starting polyrners at a ratio of 1 : 1 and by subsequently separating the unreacted parts.
All copolyrners thus produced are at least 20 C to 30 C more temperature-resistant than previously used cellulose acctate butyrates and have a much higher hardness, a substantially improved carbon black compatibility, and a far higher pigment absorption than previously known cellulose acetate butyrates.
X GE9-~0-025 1 ~637~9 With these materials the following tests were carried out.
Tc5t lio. 1:
lo an oil-heated kneader with a capacity of 1 liter 480 g of a cellulose monobutyrate were added in portions and heated up to the softening temperature of 220 C. At the same time, 60 g of a plasticer were added in portions, taking care that the softness of the mixture is such that the mechanical energy of the kneader is still transferred to the polyrer.
Energy transfer is prevented if the quantity of plasticer added or the temperature used for kneading is too high. This adversely affects the 0 number of radicals which are required and available for subsequent block polymerization and which are obtained by tearing the molecule chains. The polymer was kneaded for about 15 minutes until the mass had a silky appearance and all grains or inhomogeneities had disappeared.
Subsequently, about 110 g of an ethylene vinyl acetate copolymer of no. 4 were added and kneading continued for another 20 minutes until the corJol-~nerizate obtained during that process was completely homogeneous.
Tests have shown that the copolymerizate thus obtained is a block polymer-izate. After 24 hours, the polymer product was dissolved in ethyl acetate (10 per cent solution) and lcft for two days. During that time the unreacted polymer parts collected at the top as a turbid layer. The clear, pure copolymer solution was drained off mixed with 3 per cent carbon black and 5 per cent CaC03, and processed by meanâ of a stirrer to form a lacquer. A comparison with a pure cellulose acetate butyrate lacquer showed a noticeably reduced shrinkage of the new lacquer, which ~mongst other characteristics is indicative of an improved pigment compatibility.
~dhesion was improved, too. The new polymer has also a much ilighcr hardness.
Test No. 2:
This test was carried out in the same manner as test no. 1. The cellulose acetate butyrate no. 2 was homogenized in a kneader at 2~0 C and mixed with 110 g polyvinyl acetate of the starting material no. 5. The total kneading period was 45 minutes, then the mixture was cooled to about 150 C, and kneading continued until a coarse-grained granular material had been obtained. The pure copolymer has a high hardness, a good solubility in ethyl acetate, and good film formin~ properties. The lacuer ~roduced therefron has a very good adhesion to paper and very little shrinkage even without the addition of a plasticer.
Test No. 3:
560 g of the starting material no. 2 were homogenized by kneading at 240 C
and mixed with 110 g of the starting material no. 3, and copolymerized in accordance with the same process as in test no. 1. After about ~5 minutes kneading was completed.
During this test only very little copolyrner was obtained after dissolut on in ethyl acetate after 48 hours. A longer reaction period would lead to a higher yield, particularly if the subsequent cross-linkage is effected by means of a sufficiently temperature stable (200 - 220 C) orsanic peroxide. It is also possible to obtain a higher yield by adding the starting polyrners at a ratio of 1 : 1 and by subsequently separating the unreacted parts.
All copolyrners thus produced are at least 20 C to 30 C more temperature-resistant than previously used cellulose acctate butyrates and have a much higher hardness, a substantially improved carbon black compatibility, and a far higher pigment absorption than previously known cellulose acetate butyrates.
Claims (10)
1. Process for producing a polymerized, heat-resistant, cellulose acetate based lacquer of a high carbon black compatibility and a high pigment absorption, preferably for record carriers coated with aluminium, characterized in that, initially, the higher melting polymer is homogenized by kneading at about softening temperature, whereby the quantity of plasticer added is such that the mechanical energy of the kneading process is still transferred to the polymer, that, subsequently, the lower melting polymer is added and this mixture is kneaded up to homogenization at about the mean softening temperature, and that the copolymerizate thus obtained is processed to form a lacquer, adding pigments, if required.
2. Process in accordance with claim 1, characterized in that solvent-free cellulose acetate and high-polymer solvent-free ethylene vinyl acetate copolymerizate are processed in a kneader by kneading at about the mean softening temperature to form a copolymer-izate.
3. Process in accordance with claim 2, characterized in that subsequent cross-linkage, if required, can be effected by means of a peroxide stable at the kneading temperature, whereby the extent of the subsequent cross-linkage is determined by the quantity of peroxide added.
4. Process in accordance with claim 1, characterized in that powdery or granular cellulose acetate is mixed with polyvinyl acetate, which is also powdery or granular, or with a powdery or granular ethylene vinyl copolymerizate, by kneading to form a copolymerizate.
5. Process in accordance with claim 2, characterized in that polymerization is initiated and kept going by kneading a mixture of 50 per cent to 90 per cent of the cellulose acetate with 50 per cent to 10 per cent of the polyvinyl acetate or of the ethylene vinyl acetate copolymerizate.
6. Process in accordance with claim 1, characterized in that the cellulose acetate polyvinyl acetate copolymerizate thus-obtained by partial block polymerization is pigmented in a 5 per cent to 20 per cent solution in higher ketones or esters with 3 per cent to 4 per cent carbon black and, depending upon the degree of polymer-ization, is mixed with 0.5 per cent to 5 per cent of a phosphoric ester as a plasticer.
7. Process in accordance with claim 4, characterized in that a phosphoric acid cresol ester is used as a plasticer.
8. Process in accordance with claim 1, characterized in that bitumen or coal tar pitch is added to the lacquer for blackening.
9. Process in accordance with claim 8, characterized in that at least 1 per cent carbon black is added to the lacquer thus pigmented.
10. Process in accordance with claim 8, characterized in that about 5 per cent to 20 per cent of an anorganic pigment, such as calcium carbonate, are added to the lacquer thus pigmented.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3026468 | 1980-07-12 | ||
| DEP3026468.7 | 1980-07-12 | ||
| DEP3029428.1 | 1980-08-02 | ||
| DE19803029428 DE3029428A1 (en) | 1980-08-02 | 1980-08-02 | METHOD FOR PRODUCING A POLYMERIZED, HEAT-RESISTANT VARNISH |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1163739A true CA1163739A (en) | 1984-03-13 |
Family
ID=25786603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000380782A Expired CA1163739A (en) | 1980-07-12 | 1981-06-26 | Process for producing a polymerized, heat-resistant lacquer |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0044012B1 (en) |
| CA (1) | CA1163739A (en) |
| DE (1) | DE3169244D1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3682850A (en) * | 1970-07-30 | 1972-08-08 | Du Pont | Cellulosic esters of two organic acids blended with a copolymer of ethylene and at least one ethylenically unsaturated ester of a saturated fatty acid |
| DE2426178C3 (en) * | 1974-05-29 | 1981-12-03 | Bayer Ag, 5090 Leverkusen | Thermoplastic molding compounds made from cellulose esters and ethylene-vinyl ester copolymers |
| DE3019574A1 (en) * | 1980-05-22 | 1981-11-26 | Ibm Deutschland Gmbh, 7000 Stuttgart | METHOD FOR PRODUCING A MECHANICALLY STABLE TEMPERATURE-RESISTANT LACQUER FOR RECORD CARRIER, AND LACQUER PRODUCED BY THIS METHOD |
-
1981
- 1981-06-26 CA CA000380782A patent/CA1163739A/en not_active Expired
- 1981-07-06 DE DE8181105229T patent/DE3169244D1/en not_active Expired
- 1981-07-06 EP EP81105229A patent/EP0044012B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0044012A3 (en) | 1982-07-28 |
| EP0044012A2 (en) | 1982-01-20 |
| EP0044012B1 (en) | 1985-03-13 |
| DE3169244D1 (en) | 1985-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0661308B1 (en) | Cyclo-olefin copolymers and process for their preparation | |
| DE1720563A1 (en) | Process for the production of emulsifiable poly-alpha-olefins | |
| US4312964A (en) | Polyolefin resin composition | |
| EP0582841A1 (en) | Combinations of polyorganosiloxanes and double band-containing fluororubbers through Si-H-addition | |
| US2866775A (en) | Adhesive composition comprising crosslinked maleic ester copolymers, method of preparation and a backing coated with said composition | |
| WO2022173073A1 (en) | Thermoplastic starch composition, method for preparing same, and uses thereof | |
| Ignatov et al. | PET/PC blends and copolymers by one-step extrusion: 2. Influence of the initial polymer composition and type of catalyst | |
| DE2505825C2 (en) | ||
| DE3731054A1 (en) | PROCESS FOR PREPARING ETHYLENE / VINYL ACETATE COPOLYMERISES, NEW ETHYLENE / VINYL ACETATE COPOLYMERISES AND THEIR USE | |
| DE102007007793A1 (en) | Process for producing a thermoplastic resin composition | |
| CA1163739A (en) | Process for producing a polymerized, heat-resistant lacquer | |
| Landoll et al. | Polypropylene ionomers | |
| US4362843A (en) | Process for producing a polymerized, heat-resistant lacquer | |
| JPS63241014A (en) | Modified copolymer rubber and its production | |
| DE2026189C2 (en) | Process for the preparation of copolymers of ethylene, a functional monomer and optionally α-olefins with 3-18 carbon atoms and / or a non-conjugated diene | |
| AU605248B2 (en) | Impact modified polyester resin | |
| EP0032998A2 (en) | Thermoplastic moulding masses from grafted copolymers of cellulose esters or their admixtures with cellulose esters | |
| DE2856836A1 (en) | SILICONED GRAFT POLYMERS | |
| Bacon et al. | The interaction of maleic anhydride with rubber | |
| JPS6137814A (en) | Production of lactone-grafted cellulose derivative | |
| EP0661310A2 (en) | Cyclo-olefincopolymers and process for their preparation | |
| DE2951747A1 (en) | THERMOPLASTIC MOLDS FROM CELLULOSE ESTERS | |
| US2870128A (en) | Cross-linked esters of maleic anhydrides-styrene copolymer and method for preparation | |
| US4277388A (en) | Thermoplastic resin of hydrolyzed product of vinyl chloride copolymer for use in coating resin and process for preparing such resin | |
| DE19745701A1 (en) | Polyamide molding composition useful for molding of elastomers for automotive applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |