EP0143935B1
Expired / Lapsed
EP
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Thermoplastic polymer and articles made of a thermoplastic polymer
Assignee: RB Kunststoffpatent-Verwertungs AG
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Filing: 1984-09-27
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Granted: 1989-08-16
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Expires: 2004-09-27
Abstract
Abstract The invention relates to polymers, which are produced through using organic acids, together with the products obtained therefrom. The polymers and the products obtained therefrom are insoluble in water, but soluble in an alkaline medium. There are numerous interesting possible uses for the polymers.
Inventors
- 👤 Heinrich Dr. Deibig
- 👤 Roland Karl Belz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 10:36
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/022; B29C48/25; B29C48/78; B29C48/80; B29C48/83; B29C48/875; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92704; B29C2948/92809; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92895; B29C48/03; B29C48/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
51 words
Thermoplastic polymer formed from 2.5 to 6 mol of at least one acrylate per mol of acrylic acid and/or methacrylic acid, 0 to 0.5 mol of a termonomer as well as conventional polymerization additives, in the form of a granular material, a film, a deep-drawn injection moulded, pressed or blown part.
Claim 2
Dependent Claim
51 words
Thermoplastic polymer formed from 2.5 to 6 mol of at least one acrylate per mol of acrylic acid and/or methacrylic acid, 0 to 0.5 mol of a termonomer as well as conventional polymerization additives, in the form of a granular material, a film, a deep-drawn injection moulded, pressed or blown part.
Claim 3
Dependent Claim
31 words
Polymer according to claim 1, characterized in that the acrylate is an ester of acrylic acid with an alcohol with 1 to 18 carbon atoms, particularly methyl acrylate or ethyl acrylate.
Claim 4
Dependent Claim
63 words
Polymer according to claims 1 or 2, characterized in that the termonomer is a monomer of the group of vinyl ethers with 3 to 18 carbon atoms, particularly vinyl isobutyl ether, aromatic vinyl hydrocarbons with 8 to 11 carbon atoms, particularly styrene, acrylate or methacrylate with an alcohol residue with 1 to 18 carbon atoms, particularly n-butyl acrylate, butyl methacrylate and stearyl methacrylate.
Claim 5
Dependent Claim
24 words
Polymer according to one of the preceding claims, characterized in that the molar ratio of acrylate to acid is 3:1 to 5:1, particularly 4:1.
Claim 6
Dependent Claim
25 words
Polymer according to one of the preceding claims, characterized in that the ratio of acid to terpolymer is 1:0.1 to 1:0.4, particularly 1:0.2 to 1:0.3.
Claim 7
Dependent Claim
32 words
Polymer in accordance with one of the preceding claims, in the form of a thermoplastic film stretched in at least one direction, the film having hydrophilic characteristics and being shrinkable in water.
Claim 8
Dependent Claim
66 words
Polymer according to one of the preceding claims in the form of an article made from plastic, particularly a thin-walled article, characterized in that the article at least partly comprises a thermoplastic polymer, which is insoluble in a neutral aqueous medium, but is soluble in a basic medium and this material engages on both sides of the surface, at least at individual points of the article.
Claim 9
Dependent Claim
29 words
Article according to claim 7, characterized in that it is produced from the melt of the thermoplastic polymer, particularly by extrusion, moulding or blowing, preferably in a non-porous manner.
Claim 10
Dependent Claim
21 words
Article according to one of the claims 7 or 8, characterized in that it is produced by plastic deformation, particularly deep-drawing.
Claim 11
Dependent Claim
33 words
Article according to one of the claims 7 to 9, characterized in that the polymer soluble in basic medium extends at least at individual points extends over the entire thickness of the article.
Claim 12
Dependent Claim
30 words
Article according to one of the claims 7 to 10, characterized in that it has a wall thickness of 5 J.1m to 2 mm, preferably 40 J.1m to 500 J.1m.
Claim 13
Dependent Claim
33 words
Article according to one of the claims 7 to 11, characterized in that it completely comprises a thermoplastic polymer, which is insoluble in a neutral aqueous medium, but is soluble in basic medium.
Claim 14
Dependent Claim
18 words
Article according to claims 7 to 12, characterized in that it is constructed in a single layer form.
Claim 15
Dependent Claim
49 words
Article according to one of the claims 7 to 13, characterized in that points of the thermoplastic polymer insoluble in an aqueous medium and preferably normal thermoplastics are juxtaposed particularly essentially in a single coating with points formed from thermoplastics which are soluble in basic media and alternate therewith.
Claim 16
Dependent Claim
21 words
Article according to claim 14, characterized in that the points formed from the thermoplastic polymer of one type are continuously interconnected.
Claim 17
Dependent Claim
47 words
Article according to one of the claims 7 to 15, characterized in that partial surfaces of the polymer soluble in the basic medium are coated with at least one coating, which is disintegratable and preferably soluble in water and contains a basic solubilizer or is itself basic.
Claim 18
Dependent Claim
36 words
Use of the polymer according to one of the Claims 1 to 6, or the article according to one of the Claims 7 to 16 as a dissolvable protection, particularly in the form of a film.
Claim 19
Dependent Claim
36 words
Polymer according to one of the claims 1 to 6, characterized in that it is produced by polymerization of its monomer in at least one extruder and is preferably shaped from the melt obtained during polymerization.
References Cited (Backward Citations)
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