Flame retardant and fire resistant polyolefin composition
A polyolefin and composition technology, applied in cables, insulated conductors, conductors, etc., can solve the problems of low-performance flame retardant properties, difficult to meet mechanical properties and electrical properties and processing properties, and achieve the effect of strong flame retardant properties.
Active Publication Date: 2020-07-24
BOREALIS AG
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
Therefore, it is difficult to meet the required mechanical and electrical properties as well as acceptable processability
Furthermore, the known flammability grades have low performance flammability characteristics and only meet category E (single wire flame test) in the Construction Products Cable Regulation (CPR)
Method used
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[0075] 1. Method
[0076] a) Melt flow rate
[0077] Melt flow rate (MFR) is measured according to ISO 1133 (Davenport R-1293 from Daventest Ltd.). MFR values are at two different loads of 2.16kg (MFR 2.16 ) and 21.6kg (MFR 21 ) measured under. For ATH-containing formulations, MFR values are measured at 150°C. For all polymers and all other compounds a temperature of 190°C was used.
[0078] b) Comonomer content
[0079] Quantitative nuclear magnetic resonance (NMR) spectroscopy was used to quantify the comonomer content of the polymer compositions or polymers given in the context.
[0080] 1H NMR quantitative spectra were recorded in solution using a Bruker Advance III 400 NMR spectrometer operating at 400.15 MHz. All spectra were recorded at 100 °C using nitrogen gas for all pneumatics using a standard broadband reversed 5 mm probe. Di-tert-butylhydroxytoluene (BHT) (CAS 128-37-0) was used as a stabilizer and approximately 200 mg of the material was dissolved in ...
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Abstract
The present invention is directed to a polyolefin composition which has flame retardant and / or fire resistant properties and is suitable as flame retardant and / or fire resistant layer of a wire or cable. The polyolefin composition of the present invention comprises an polyolefin homo- or copolymer, ground magnesium hydroxide having particle size distribution D50 of 1.5 to 5.0 mum in an amount of 30 to 65 wt% based on the weight of the polyolefin composition, and a silicone fluid or gum in an amount of 0.1 to 20 wt% based on the weight of the polyolefin composition. The present invention is further directed to a wire or cable comprising one or more layers, wherein at least one layer thereof is obtained from the polyolefin composition of the present invention. Finally, the present inventionis further directed to the use of a polyolefin composition of the present invention as a flame retardant layer of a wire or cable.
Description
technical field [0001] The present invention relates to a polyolefin composition having flame-retardant and fire-resistant properties and suitable as a flame-retardant and / or fire-resistant layer for wires or cables. The invention further relates to a wire or cable comprising one or more layers, wherein at least one layer thereof comprises the polyolefin composition of the invention. Finally, the invention further relates to the use of the polyolefin composition according to the invention as a flame retardant layer for wires or cables. Background technique [0002] A typical power cable or wire usually includes one or more conductors in a cable core surrounded by one or more insulating layers or sheaths of polymeric material. The core is usually copper or aluminium, but it can also be non-metallic, surrounded by several different polymer layers, each polymer layer serving a specific function, e.g. semi-conductive shielding, insulation, metal tape shielding layer and polyme...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01B7/00C08L23/08C08K3/22C08K3/38
CPCC08L23/0892C08K2003/387C08K2201/005C08K2201/006C08G77/04C08G77/18C08L83/04Y02E10/50C08K3/22C08L83/00C08K3/38H01B3/441H01B3/46H01B7/02C08K2003/2224C08L2201/02C08L2201/08C08L2203/202H01B7/00H01B7/295H01B3/44C08L23/08C08K2003/2217C08L23/06C08L23/0869
Inventor S·尼尔森L·尼尔森B·A·苏丹
Owner BOREALIS AG