Polypropylene composition with improved UV stability and expanding flame retardant
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- BOREALIS AG
- Filing Date
- 2024-06-07
- Publication Date
- 2026-06-17
Smart Images
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Abstract
Claims
1. A polypropylene composition, the following: (a) 20 to 75% by mass of a polymer of propylene; (b) A halogen-free flame retardant containing 20 to 30% by mass of nitrogen and phosphorus; (c) 0.2 to 2.0% by mass of pigment; and (d) 0.2 to 5.0% by mass of additives; This includes, in relation to the total amount of the polypropylene composition, where, The additive (d) is as follows: (d1) 0.1 to 1.0% by mass of at least one hindered amine light stabilizer (NOR-HALS) containing a NOR moiety; and (d2) 0.1 to 1.0% by mass of at least one acid scavenger; A polypropylene composition comprising the above in proportion to the total amount of the polypropylene composition.
2. (a) The propylene polymer is either a heterogeneous copolymer of propylene, The polypropylene composition according to claim 1, comprising a polypropylene matrix (a1) component and a heterophase copolymer of propylene comprising an elastic propylene copolymer component (a2) dispersed in the polypropylene matrix (a1) and containing (i) propylene and (ii) units derived from ethylene and / or C4-C20 olefins.
3. (a) Melt flow rate MFR of propylene polymer ２ The polypropylene composition according to claim 1 or 2, wherein (230°C / 2.16 kg) is a heterophase copolymer of propylene, which, when measured according to ISO 1133, is in the range of 10 to 200 g / 10 min or 60 to 200 g / 10 min.
4. Furthermore, the polypropylene composition according to any one of claims 1 to 3, comprising (aa) 10 to 50% by mass of glass fibers or glass short fibers having an average fiber diameter of 9 to 15 μm, based on the total amount of the polypropylene composition, wherein the average fiber diameter is determined according to ISO 1888:2006 (E) Method B.
5. Furthermore, the polypropylene composition according to claim 4, comprising (a) 1 to 5% by mass of an adhesion promoter based on the total amount of the polypropylene composition, wherein the adhesion promoter is a homopolymer or copolymer of polypropylene grafted with maleic anhydride.
6. (b) A halogen-free flame retardant containing nitrogen and phosphorus comprises at least one nitrogen-containing portion and at least one phosphorus-containing portion, Here, the at least one nitrogen-containing portion is selected from the group consisting of ammonium, piperazine, melamine, diamine, amide, derivatives thereof and combinations thereof, and / or Here, the at least one phosphorus-containing portion is selected from the group consisting of phosphates, for example, orthophosphates; diphosphates; polyphosphates or pyrophosphates, phosphoric acid, polyphosphates, phosphinic acid, phosphorus pentoxide, derivatives thereof, and combinations thereof. The polypropylene composition according to any one of claims 1 to 5.
7. (b) The polypropylene composition according to any one of claims 1 to 6, wherein the halogen-free flame retardant containing nitrogen and phosphorus comprises 35 to 40% by mass of melamine polyphosphate and 50 to 60% by mass of piperazine pyrophosphate based on the total amount of the halogen-free flame retardant.
8. (c) The polypropylene composition according to any one of claims 1 to 7, wherein the pigment is an organic pigment and / or carbon black, and if it is an organic pigment, it is selected from phthalocyanine green pigment and phthalocyanine blue pigment.
9. (d1) The polypropylene composition according to any one of claims 1 to 8, wherein NOR-HALS is 1,3,5-triazine-2,4,6-triamine, N2,N2'-1,6-hexanediyrbis[N4,N6-dibutyl-N2,N4,N6-tris(2,2,6,6-tetramethyl-4-piperidinyl)-,N-allyl derivative, oxidized NOR-HALS, or hydrogenated NOR-HALS (CAS:1902936-62-2).
10. (d2) The polypropylene composition according to any one of claims 1 to 9, wherein the acid scavenger is calcium stearate (CAS: 1592-23-0).
11. Furthermore, the polypropylene composition according to any one of claims 1 to 10, comprising (d3) at least one UV absorber containing a phenolic hydroxyl group in an amount of 0.1 to 0.8% by mass relative to the total amount of the polypropylene composition, wherein the UV absorber is selected from 2-hydroxy-4-n-octoxybenzophenone (CAS: 1843-05-6), 2-(4,6-bis-(2,4-dimethylphenyl)-1,3,5-triazine-2-yl)-5-(octyloxy)-phenol (CAS: 2725-22-6), and hexadecyl-3,5-bis-tert-butyl-4-hydroxybenzoate (CAS: 67845-93-6).
12. Furthermore, (d4) at least one antioxidant in an amount of 0.1 to 0.5% by mass relative to the total amount of the polypropylene composition, and (d5) at least one metal deactivator in an amount of 0.1 to 0.5% by mass relative to the total amount of the polypropylene composition, wherein (d4) the antioxidant is selected from octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (CAS: 2082-79-3) and tris(2,4-di-t-butylphenyl) phosphite (CAS: 31570-04-4), The polypropylene composition according to any one of claims 1 to 11, wherein the (d5) metal deactivator is 2,2'-oxamide-bis-(ethyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)-propionate) (CAS:70331-94-1).
13. An article comprising the polypropylene composition according to any one of claims 1 to 12.
14. The article according to claim 13, which forms or constitutes a part of a battery housing or a housing for an electrical device, or forms or constitutes a part of an electrical cable insulator, container, or a power electronics component of a part of an automobile or household electrical appliance.
15. (i) NOR-HALS and (ii) an acid scavenger are used in combination to improve the UV stability of a polypropylene composition containing a halogen-free flame retardant containing nitrogen and phosphorus.