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Flame-resistant polyester-olycarbonate compositions, methods of manufacture, and articles thereof

A technology of polycarbonate and composition, which is applied in the field of polyester-polycarbonate flame retardant composition, preparation and its products, and can solve the problems of low impact resistance or heat resistance

Active Publication Date: 2013-09-04
SHPP GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite good flame retardancy, such compositions can suffer from the fact that some other important properties, such as notched impact resistance or heat resistance, are much lower than compositions without organophosphates
To date, however, the use of EXL polymers as impact modifiers to produce non-reactive polymers with an attractive balance of properties in terms of chemical, thermal and impact resistance, in addition to good flame retardancy, has not been fully recognized or described. halogenated polyester-polycarbonate compositions, and there is no suggestion that the maximum polyester content in polycarbonate compositions can be significantly increased by using the EXL polymer
Although U.S. Patent No. 7,067,567 provides some examples of incorporation of silicones into grafted rubber bases, the same restrictions on maximum polyester levels are imposed in these examples as for formulations including other grafted rubbers

Method used

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  • Flame-resistant polyester-olycarbonate compositions, methods of manufacture, and articles thereof
  • Flame-resistant polyester-olycarbonate compositions, methods of manufacture, and articles thereof
  • Flame-resistant polyester-olycarbonate compositions, methods of manufacture, and articles thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-12 and comparative example C1-C5

[0194] Compositions with the formulations (wt%) shown in Table 3 were prepared as described above, except that the PET-containing compositions were processed at a temperature 20°C higher than the PBT-containing compositions, including extrusion and In molding operation. In addition to the components shown, each composition was formulated with 0.15 wt% MZP, 0.8 wt% TSAN, 0.15 wt% AO and 0.27 wt% UVS. The results are also shown in Table 3.

[0195] table 3.

[0196]

[0197] As can be seen from the data in Table 3, when organophosphorus (BPA-DP) is present in the composition of C1 without impact modifier, the composition achieves a flammability rating of V0, but the impact resistance Reduced compared with Examples 1-11. In comparative examples C2-C5, impact modifiers were added to improve impact resistance, but the composition did not simultaneously achieve the desired balance of properties (V0 flammability rating, good impact resistance (greater than 400 J / m, especially g...

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PUM

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Abstract

A composition comprising a polyester, polycarbonate, organopolysiloxane- polycarbonate block copolymer, organophosphorus flame retardant, fluorinated polyolefin, and one or more additives. In one embodiment, the composition has an improved balance of properties, including one or more of a melt volume rate, Vicat softening temperature, notched Izod impact strength and a UL 94 flammability rating.

Description

Background of the Invention [0001] In many applications, especially when using electrical and electronic components, there is a need for flame retardant polymer compositions with the combined properties of good chemical resistance, high impact and high heat resistance, wherein Halogenated flame retardant additives. Alloys of polyester and polycarbonate can provide some improvement in polycarbonate properties. Although multiple patents have disclosed such alloys over the years, polyester-polycarbonate commercial flame retardant materials with an attractive balance of properties are still very rare in the marketplace. One reason is that compositions in this field can be limited in the maximum amount of polyester that can be included in the composition, which results in alloys that are closer in properties to pure polycarbonate than a more balanced polyester- Polycarbonate composition. For example, US Patent No. 7,0675,67 limits the polyester content to a maximum of 12 wt %, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L69/00
CPCC08G77/448C08K5/523C08K5/526C08L27/12C08L27/18C08L51/04C08L53/00C08L67/02C08L83/10C08K5/0008C08L69/00
Inventor S.万J.G.M.范吉斯伯根M.王
Owner SHPP GLOBAL TECH BV
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