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Flame retardant polymer composition

A technology for flame-retardant polymers and compositions, applied in mechanical equipment, engine components, engine sealing, etc., can solve the problems of elastomer breakage, deterioration of mechanical properties, and inability to achieve desired properties of polymer compositions.

Pending Publication Date: 2022-07-12
CARL FREUDENBERG KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high temperatures can damage the polymer chains
In the worst case, this can cause the elastomer to break
This leads to the fact that the desired properties of the polymer composition can no longer be achieved
Furthermore, the use of large amounts of PPS leads to deterioration of mechanical properties, as the material becomes harder and harder with increasing amounts of PPS

Method used

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  • Flame retardant polymer composition
  • Flame retardant polymer composition
  • Flame retardant polymer composition

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0112] In a first embodiment, the method of preparing the curable flame retardant polymer composition of the present invention comprises the steps of:

[0113] i) providing at least one curable elastomer a),

[0114] ii) providing at least one polyarylene sulfide b),

[0115] iii) mixing the curable elastomer a) with the polyarylene sulfide b) at a temperature greater than the plasticizing temperature of the elastomer a) and less than the melting temperature of the polyarylene sulfide b),

[0116] iv) adding a curing agent, especially a peroxide curing agent, to the polymer mixture to form a curable elastomeric composition,

[0117] In another embodiment, a method for preparing a cured flame retardant polymer composition according to the present invention comprises the steps of:

[0118] i) providing at least one curable elastomer a),

[0119] ii) providing at least one polyarylene sulfide b),

[0120] iii) mixing the curable elastomer a) with the polyarylene sulfide b) at...

Embodiment

[0145] The following examples serve to illustrate the invention without limiting it in any way.

[0146] The following examples show that polyparaphenylene sulfide can significantly improve the flame retardancy of polyolefin polymers consisting of ethylene propylene diene propylene rubber, magnesium hydroxide, and aluminum hydroxide.

[0147] The following starting components were used in the examples.

[0148] Materials used:

[0149] EPDM1: EPDM rubber, ethylene content 53% by weight; ENB content 6.0% by weight, Mooney viscosity 25 (ML1+4@121°C)

[0150] EPDM2: EPDM rubber, oil content 50% by weight, ethylene content 63% by weight; ENB content 4.5% by weight, Mooney viscosity 52 (ML1+4@121°C)

[0151] PPS: polyparaphenylene sulfide, particle size 20μm

[0152] Antioxidant: 2,2,4-trimethyl-1,2-dihydroquinoline, polymeric

[0153] Peroxide: Dicumyl Peroxide

[0154] Auxiliary: triallyl cyanurate

[0155] DOA: plasticizer, dioctyl adipate

[0156] Carbon black: carbon bl...

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Abstract

The invention relates to a flame-retardant polymer composition, to a method for producing a flame-retardant polymer composition, to the use of a polyarylene sulfide as a flame retardant and to the use of the flame-retardant polymer composition.

Description

[0001] Field of Invention [0002] The present invention relates to a flame retardant polymer composition, a method for preparing the flame retardant polymer composition, the use of polyarylene sulfide as a flame retardant and the use of the flame retardant polymer composition. Background technique [0003] Polyolefin polymers are successfully used in large quantities as molding compositions, for example in the automotive industry, electrical engineering, household appliance technology or mechanical engineering. It is often necessary to flame retardant polymers so that they meet the technical requirements of flammability testing, for example according to UL 94 (Underwriter Laboratories USA). [0004] In order to improve the flame retardant properties of polyolefin polymer-based materials and molding compositions, flame retardants, such as organohalogen compounds, organophosphate compounds, antimony compounds, tin compounds and / or zinc compounds, are usually added. However, ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/02C08L23/16F16J15/32C08K5/3492C08K3/22C08K3/32
CPCC08L23/02C08L23/16C08L2201/02C08L2205/14C08L2205/16C08K2201/003C08K2201/005C08K2003/2224C08K2003/2227C08K2003/323C08K5/34928F16J15/065C08L81/04C08K5/0025C08K5/14C08K3/10C08K5/49C08K5/02C08K3/105C08J3/005C08J3/24C08J2323/16C08J2381/04
Inventor A·兰齐纳
Owner CARL FREUDENBERG KG