Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1999-06-24
2000-11-21
Yoon, Tae
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524 13, 524 16, 524425, 524914, 525531, 525532, 528296, 428482, C08L 6300, C08L 100, C08G 6342, C08K 326, B32B 2736
Patent
active
06150436&
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to materials containing polyreaction products, methods for the production thereof, and the use thereof for the production of planar structures or sheet materials, respectively, based on renewable raw materials.
BACKGROUND OF THE INVENTION
Linoleum has long been known as a resilient floor covering based on renewable raw materials. Because of its natural constituents, linoleum has achieved great structural-biological and environmental importance. The production of linoleum coverings, however, requires in the last stage of the process a heat treatment that lasts several weeks, the "ripening time. "
Coating masses that are based on renewable raw materials and serve for the coating of planar structures or of release paper are known from DE-A-41 35 664. The coating masses consist of a combination of epoxidation products of esters of unsaturated fatty acids and partial esters of polycarboxylic acids with polyether polyols as well as a hydrophobing agent. These coating masses are used for the production of floor coverings. It is disadvantageous, however, that the top layer of coverings produced in this way is very rough and non-transparent. Further, the back coatings require a complicated production with more costly separating paper or release paper, has no foam, and thus offer no walking comfort. Furthermore, it turns out that the surface of these coverings is not sufficiently dirt-repellent and exhibits poor complete curing.
Spreadable coating masses for the production of planar structures based on renewable raw materials are known from WO 96/15203. The production of these planar structures, however, is restricted to spreading or coating processes because of the use of so called "coating pastes" that contain the coating masses.
OBJECTS AND SUMMARY OF THE INVENTION
Thus it is an object of the present invention to provide a new system for the production of planar structures or sheet materials based on renewable raw materials, which system eliminates, in particular, the time-intensive ripening time of linoleum coverings and is easy to produce, for example, by press-molding, calendering or extrusion. Further, planar structures produced in this way should exhibit excellent material properties.
DETAILED DESCRIPTION OF THE INVENTION
This object is solved by the embodiments characterized in the Claims. In particular, there is provided a material containing polyreaction products, which contains as binder the reaction product of at least one dicarboxylic or polycarboxylic acid or derivatives thereof, or of a mixture thereof with at least one epoxidation product of a carboxylic acid ester, or of a mixture of these epoxidation products, and at least one filler.
The dicarboxylic acids or polycarboxylic acids or derivatives thereof preferably contain at least one double bond per molecule.
Maleic acid, itaconic acid, fumaric acid, succinic acid, methylsuccinic acid, malic acid or furandicarboxylic acid, or a mixture thereof containing at least two of these acids can preferably be used as dicarboxylic acid. Acids with three or more carboxyl groups such as, for example, citric acid and aconitic acid can preferably be used as polycarboxylic acids.
Anhydrides or partial esters or derivatives having at least one free carboxyl group can be used as derivatives of the dicarboxylic acids or polycarboxylic acids. The alcohol component of the partial esters is not subject to special restriction, but polyols such as dipropylene glycol, propanediols, butanediols, hexanediols, hexanetriols, or pentaerythritol are preferably used as alcohol component.
In an especially preferred embodiment, a mixture of a partial ester of maleic anhydride and dipropylene glycol together with citric acid is used as crosslinking agent, the content of citric acid being up to 50 percent by weight, more preferably up to 25 percent by weight, relative to the total quantity of crosslinking agent.
Epoxidized linseed oil, epoxidized soybean oil, epoxidized castor oil or epoxidized rape-seed oil or a mixture there
REFERENCES:
patent: 4056403 (1977-11-01), Cramer et al.
patent: 4686270 (1987-08-01), Van der Linde et al.
Ess Milko
Kastl Bernd
Mauk Hanns-Jorg
DLW Aktiengesellschaft
Yoon Tae
LandOfFree
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