Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers
Patent
1986-05-09
1989-06-20
Lesmes, George F.
Stock material or miscellaneous articles
Composite
Of addition polymer from unsaturated monomers
427 44, 427307, 4273934, 4273855, 4273935, 428500, 428516, B32B 2732
Patent
active
048408514
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention is within the field of surface coating of a substrate, for instance a polymeric substrate, with a polymeric coating containing ethylene oxide units as primary structural units thereof. The new surface coating according to the invention imparts to the substrate outstanding properties which make it possible to utilize the surface coated articles obtained in novel applications as compared to previously known surface coated articles in this field. More specifically the invention relates to a surface coated article comprising a substrate with a curved polyethylene oxide-based coating thereupon, to a special process for the preparation of such a surface coated article, to a special coating composition for the preparation of said surface coated article and to use of the article as an antifouling or antistatic article or as an article with friction-reducing properties. A new, very interesting application of the article according to the invention is within the biomedical field, which is primarily due to the protein-repellent properties of the surface coating as will be described more in detail below.
BACKGROUND TO THE INVENTION
DT-PS No. 10 28 524 discloses a method of coating or impregnating textiles with a coating of polyalkylene oxide and the use of said coating as an antistatic, soil-repellent and water absorbing coating. A similar method is disclosed in DT-AS No. 22 39 592, which is specifically directed to a method of improving the stability of the coating by adding a cationic antistatic agent in the form of a reactive alkyl ethylene-urea and by performing the curing operation at elevated temperatures in the presence of moisture as a catalyst. According to both these references the preferred method for obtaining a cured coating seems to be the use of a polyalkylene oxide having at least two unsaturated groups in the form of acrylic, methacrylic and/or vinyl groups at the ends of the molecule or in side chains which groups are crosslinked by means of thermally activated initiators at elevated temperatures. Furthermore, these previously known methods require several process steps. It is true that DT-AS No. 22 39 592 mentions as an alternative the use of a mixture of a polyalkylene glycol with a polymerizable vinyl group in one end thereof and a vinyl monomer with at least two vinyl groups, but said alternative is in no way disclosed as any preferred alternative. Furthermore, said German citation neither discloses nor suggests the essential combination of features necessary according to the present invention or even less the outstanding combination of properties obtained by the present invention. Finally, no stabilization treatment is required in connection with the present invention as is required according to DT-AS No. 22 39 592.
Thus, as will be described more in detail below the present invention relates merely to polyethylene oxide as a coating material, which means essential advantages as compared to the use of other polyalkylene oxides, primarily thanks to the structural compatibility between the ethylene oxide units and the water molecules. However, the major difference relative to the prior art is not the use of polyethylene oxide per se but rather the following combination of features: the presence of ethylenically unsaturated groups at one end of the polyethylene oxide chains only, the way of accomplishing the cross-linking of the polyethylene oxide chains to obtain a stable coating on the substrate to be coated, viz. by radiation curing, and the swelling of the substrate prior to cross-linking. These major differences relative to the prior art impart to the manufactured article a unique structure of densely packed non-modified polyethylene oxide chains pendant from the substrate as well as a firm anchoring of the coating to the substrate.
As to the radiation curing this is a curing technique known per se, as is disclosed e.g. in EP, No. A1, 0 057 906. However, as was mentioned above the present invention is based on a combination of features, of which radiati
REFERENCES:
patent: 3925589 (1975-12-01), Sturwold et al.
patent: 3959559 (1976-05-01), Kimoto et al.
patent: 3959560 (1976-05-01), Sturwold et al.
patent: 4065598 (1977-12-01), Takahashi et al.
patent: 4110227 (1978-08-01), Newkirk et al.
patent: 4391686 (1983-07-01), Miller et al.
patent: 4422914 (1983-12-01), Tsao et al.
patent: 4537922 (1985-08-01), Chang et al.
Golander Carl G.
Jonsson Erik S.
Vladkova Todorka G.
Lesmes George F.
Monroe J. B.
Ytkemiska Institutet
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