Claims
- 1. A multi-layered sealing sheet for the building industry comprising at least one outer layer containing elastomeric synthetic resin, which is weldable thermally and/or by solvents or swelling agents, and a textile reinforcing layer bonded to said at least one outer layer by thermal welding, said reinforcing layer being applied to the outside surface of said at least one outer layer of an elastomeric synthetic resin, all of the layers of said sheet containing elastomeric synthetic resin being free of vulcanization accelerator, and containing synthetic resin consisting essentially of an ethylene-propylene-diene terpolymer and/or an ethylene-propylene copolymer and said textile reinforcing layer being formed of synthetic resin fibers and/or glass fibers, having a weight per unit area of 10 to 300 g/m.sup.2, and having interstices into which the heated elastomeric synthetic resin penetrates during said thermal welding to provide a bond exhibiting a parting strength which is larger than 100 N/5 cm.
- 2. The sealing sheet according to claim 1, wherein the at least one layer containing the elastomeric synthetic resin has a composition comprising:
- 35-46% by weight of an ethylene-propylene-diene terpolymer, an ethylene-propylene copolymer, or a mixture of the terpolymer and the copolymer;
- 40-58% by weight of filler of which up to 50% by weight is carbon black;
- 5-12% by weight of extenders or similar materials;
- 0.1-10% by weight of stabilizers and antiaging compounds; and
- 1.9-5% by weight of mold release agents and auxiliary processing media.
- 3. The sealing sheet according to claim 1, wherein elastomeric synthetic resin-containing layer contains, as the fillers:
- 12-24% by weight of carbon black; and
- 26-31% by weight of silicic acid anhydride and/or silica (silicic acid anhydride and kaolinite with a particle size smaller than 20 .mu.m and at least 40% smaller than 2 .mu.m), based on 100% by weight of layer.
- 4. The sealing sheet according to claim 1, wherein the layers of elastomeric synthetic resin contain:
- 35-46% by weight of ethylene-propylene-diene terpolymer and/or ethylene-propylene copolymer;
- 26-31% by weight of at least one filler, comprising chalk, kaolin, talc, baryte and/or glass fibers in mixtures with silica, or only silica, or silicic acid anhydride, respectively;
- 7-12% by weight of aliphatic and/or naphthenic extender oils;
- 0.1-1.0% by weight of stabilizers and antiaging compounds, comprising sterically hindered phenolic antioxidants, phenolic phosphites, thioesters of aliphatic carboxylic acids;
- 12-24% by weight of reinforcing carbon black types;
- 0.1-2.0% by weight of mold release agents comprising metallic soaps;
- 1.8-2.3% by weight of processing aids, comprising acid esters and hydrogenated hydrocarbon resins.
- 5. A sealing sheet according to claim 1, wherein said elastomeric synthetic, resin consist essentially of an ethylene-propylene copolymer containing at least 65% by weight of ethylene and maximum 35% by weight of propylene or an ethylene-propylene-diene terpolymer containing at least 65% by weight of ethylene, 5 to 34% by weight of propylene, and to 8% by weight of a diene component, preferably less than 5% by weight of a diene component.
- 6. A sealing sheet according to claim 5, wherein the ethylene-propylene-diene terpolymer contains ethylidene norbornene as the diene component.
- 7. A sealing sheet according to claim 1, wherein the ethylene-propylene-diene terpolymer, the ethylene-propylene copolymer or mixtures thereof are partially crystalline and exhibit a melting heat in accordance with DSC of at least .DELTA.H.sub.s =10 J/g.
- 8. A sealing sheet according to claim 1, wherein the elastomeric synthetic resin exhibits a tear strength of at least 5 N/mm.sup.2.
- 9. A sealing sheet according to claim 1, wherein two calendered layers of the elastomeric synthetic resin having a thickness of 0.6-0.9 mm are laminated together under pressure and heat and then one of the calendered layers is laminated to the reinforcing layer.
- 10. A sealing sheet according to claim 1, wherein the reinforcing layer is a fabric, a mat, a knitted material, or a similar material of synthetic resin fibers and/or glass fibers having a weight per unit area of 20-70 g/m.sup.2 and with interstices in the fabric, mat, knitted material, or the like, between the warp and weft threads having at least 2.0 mm spacing.
- 11. A sealing sheet according to claim 1, wherein as the outside reinforcing layer, a synthetic resin fiber mat having a weight per unit area of 80-250 g/m.sup.2 and a thickness of 0.3-2 mm, is thermally bonded to elastomeric synthetic resin-containing layer.
- 12. A sealing sheet according to claim 1, wherein as an outside reinforcing layer, a glass fiber may having a weight per unit area of 70-150 g/m.sup.2 and a thickness of 0.4-2 mm with a glass fiber diameter of 10-15 .mu.m, is thermally bonded to the elastomeric synthetic resin-containing layer.
- 13. A sealing sheet according to claim 1, wherein reinforcing layer comprises a non-woven mat that is formed of randomly arranged fibers and that has interstices into which the heated elastomeric synthetic resin penetrates from one side of the layer to provide a tear strength of at least 400 N/5 cm.
- 14. A sealing sheet according to claim 13, wherein the mat is thermofixed prior to being bonded to the elastomeric synthetic resin by being thermally welded.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3150021 |
Dec 1981 |
DEX |
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Parent Case Info
This is a continuation of application Ser. No. 475,520, filed Mar. 15, 1983 now abandoned, which is a C-I-P application of Ser. No. 421,400, filed 9/22/82, now U.S. Pat. No. 4,435,466, issued 3/6/84.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4126721 |
Vitt |
Nov 1978 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
475520 |
Mar 1983 |
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Continuation in Parts (1)
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Number |
Date |
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421400 |
Sep 1982 |
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