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Flame retardant polymeric compositions

A technology of composition and polymer, which is applied in the field of flame-retardant thermoplastic molding compositions, and can solve problems such as discoloration of polymer products, environmental problems, serious problems, etc.

Inactive Publication Date: 2008-09-17
伊塔尔麦奇化学股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] Such compositions have been reported to be effective only on unfilled homopolypropylene, and even then, are not entirely satisfactory due to the counteracting effects of the components which discolor the polymer article
Furthermore, it should be noted that bismuth compounds are necessary in the above-mentioned prior art compositions, but they may cause serious environmental problems (La medicina Biologica Oct-Dec 2001 -A.M.: Pasciuto-XVI National Conference- Milan 02.06.2001 - Rome 09.06.2001)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0081] The components listed in the table below were mixed in a twin screw extruder at a temperature set between 160°C and 230°C depending on the chemistry of the polymer used. After granulation and drying, the pellets were injection molded into test specimens, which were to be used for flammability tests according to UL standards, specifically the UL94 test, which was specified as follows:

[0082] • Condition 5 samples (per formulation and thickness) at 23°C and 50% relative humidity;

[0083] • Place each conditioned sample approximately 20 cm from the underlying cotton pad in a vertical position;

[0084] • Each sample was flamed twice (once the 1st ignited sample extinguished, the 2nd igniting started). Report UL 94 results in the following sense as defined in the standard:

[0085] ·V0: When the total re-ignition time of the 5 test samples is not longer than 50 seconds, each ignition is less than 10 seconds, and there is no burning material dripping.

[0086] ·V1: Whe...

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PUM

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Abstract

The present invention provides flame retardant thermoplastic moulding compositions comprising: A) from 65% to 99,5% by weight (with respect of the total weight of the final 5 composition) of a polyolefinic polymer particularly selected among polypropylene polymers; B) from 0,1% to 30% by weight (with respect of the total weight of the final composition) of a synergic mixture of an hypophosphorous acid metal salt and halogenated organic compounds ; io C) from 0,5% to 10 % by weight (with respect of the total weight of the final composition) of a plurality of selected additives consisting of processing aids, heat and process stabilisers, UV stabilisers, antidripping agents (PTFE -Polytetrafluoroethylene), pigments, mould releasing agents, nucleating agents is D) from 0% to 50% by weight (with respect of the total weight of the final composition) of an inorganic filler.; The total of the percentages by weight of components A to D is 100 %.

Description

technical field [0001] The present invention relates to certain flame-retardant thermoplastic molding compositions, especially selected from olefin polymers, to a process for their preparation and to their use in the preparation of flame-retardant polyolefin articles. Background technique [0002] It is well known that polyolefin polymers are particularly sensitive to ignition by fire; therefore, they require a suitable protection especially in important applications, such as some household electrical appliances, construction materials and interior decoration materials. [0003] Some studies have been done to impart satisfactory fire resistance for these applications. [0004] For example, Japanese Patent Nos. 53-92855, 54-29350, 54-77658, 56-26954, 57-87482 and 60-110738 disclose a , aluminum hydroxide, hydrotalcite inorganic flame retardant additives to prepare flame retardant polypropylene resin composition method. [0005] However, to be effective, all of these additiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/04C08K3/22C08K5/3492C08K5/02C08K5/01C08K5/521C08K5/13
CPCC08K5/521C08L27/12C08K5/06C08L2201/02C08L23/04C08K5/34928C08L23/10C08K5/02C08L23/12C08L2666/04C08K3/24C08K3/00C08L101/00
Inventor S·科斯坦兹
Owner 伊塔尔麦奇化学股份公司
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