Low smoke halogen-free flame retardant ethylene-propylene-diene rubber and preparation method by extrusion molding thereof

A technology of EPDM rubber and flame-retardant rubber, which is applied in mechanical equipment, engine components, transportation and packaging, etc., and can solve the impact of extrusion processing performance and the mechanical properties of EPDM rubber (increased hardness, inability to achieve continuous Production and other issues, to achieve the effect of good low-smoke, halogen-free flame retardant performance and excellent mechanical properties

Active Publication Date: 2010-05-12
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overall addition of intumescent flame retardants is slightly lower than that of hydroxides, generally 20% to 40%, but it is not suitable for the mechanical properties of EPDM (increased hardness, decreased elasticity and strength, not suitable for sealing) and Extrusion processing performance is significantly affected, and continuous production cannot be achieved
[0006] Although the above-mentioned flame-retardant rubber materials have high oxygen index and good flame-retardant properties, they do not have good mechanical properties and extrusion processing properties at the same time.

Method used

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  • Low smoke halogen-free flame retardant ethylene-propylene-diene rubber and preparation method by extrusion molding thereof
  • Low smoke halogen-free flame retardant ethylene-propylene-diene rubber and preparation method by extrusion molding thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The components and mass parts are: 85 parts of EPDM rubber (EP35), 15 parts of maleic anhydride grafted EPDM rubber (EPDM-MAH), 5 parts of zinc oxide, 2 parts of stearic acid, boric acid 5 parts of zinc, 15 parts of microencapsulated red phosphorus, 60 parts of carbon black (N550), 15 parts of magnesium hydroxide surface-modified by nano-scale vinyl silane coupling agent, 135 parts of magnesium hydroxide surface-modified by micron-scale aminosilane Parts, 40 parts of naphthenic oil (YT-10), the mass parts of accelerator M / TMTD are respectively 0.5 / 1.5, and 1.3 parts of sulfur.

[0033] The preparation process of Example 1 is as follows: firstly mix the raw rubber matrix evenly on the heating open rubber mixer, and control the roller temperature at 90-100°C; Thin pass 3 times, then increase the roll distance to about 3mm, then cover the roll and feed, then add carbon black, modified hydroxide, flame retardant synergist, plasticizer, vulcanization accelerator, and vulcani...

Embodiment 2

[0035] The components and mass parts are: 95 parts of EPDM rubber (EP33), 5 parts of ethylene-octene copolymer elastomer (POE8180), 5 parts of zinc oxide, 2 parts of stearic acid, 10 parts of zinc borate, 10 parts of polydimethylsiloxane (PDMS), 50 parts of carbon black (N774), 20 parts of magnesium hydroxide surface-modified by nano-sized vinyl silane coupling agent, and micron-sized epoxy silane modified aluminum hydroxide 150 parts, 40 parts of paraffin oil (KP6030), 1.5 / 0.8 / 2.5 parts of accelerator DM / TMTD / BZ and 1.5 parts of sulfur.

[0036] The preparation process of Example 2 is as follows: the internal mixer rubber mixing method is adopted, that is, carbon black, modified hydroxide, flame retardant synergist, plasticizer and raw rubber matrix are sequentially put into the mixing chamber according to the ratio and pressurized Mix for about 10 minutes (keep the pressure of the top bolt at 0.6 MPa during the mixing process), control the discharge temperature at 85-90°C, t...

Embodiment 3

[0038] The components and mass parts are: EPDM rubber (EP33) 80 parts, ethylene-octene copolymer elastomer (POE8180) 20 parts, zinc oxide 5 parts, stearic acid 2 parts, polydimethylsiloxane 12 parts of oxane, 8 parts of microencapsulated red phosphorus, 40 parts of carbon black (SP-5000), 30 parts of aluminum hydroxide surface-modified by nano-scale polysulfide silane coupling agent, micron-scale epoxy silane modified 130 parts of aluminum hydroxide, 30 parts of polyisobutylene (PB680), 0.5 / 0.75 / 1.5 parts of accelerator M / DPTT / BZ and 1.3 parts of sulfur.

[0039] The preparation process of Example 3 is as follows: firstly mix the raw rubber matrix evenly on the heating type open rubber mixer, and control the roller temperature at 90-100°C; Thin pass 3 times, then increase the roll distance to about 3mm, then cover the roll and feed, then add carbon black, modified hydroxide, flame retardant synergist, plasticizer, vulcanization accelerator, and vulcanizing agent to the In the...

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Abstract

The invention relates to a low smoke halogen-free flame retardant ethylene-propylene-diene rubber and a preparation method by extrusion molding thereof; the preparation method comprises the following steps: firstly, raw rubber matrix is evenly mixed at 80-100 DEG C by an open mill or a banbury mixer, and then cooled down to the room temperature; carbon black, modified nanometer/micrometer hydroxide, plasticizer, flame retardant synergist, vulcanization accelerator and vulcanizing agent are added in sequence according to the proportion and evenly mixed. Mixed rubber is added into a single screw extrusion machine; the temperature of a machine body, a screw and a machine head is controlled to be 50-90 DEG C; the rotating speed of the screw is within 15-40 r/min to cause that glue stock is continuously squeezed out; and hot air (175-200 DEG C) or microwave (915-2450 MHz) is adopted to cause that the glue stock is continuously vulcanized and molded. The flame retardant ethylene-propylene-diene rubber has excellent mechanical property, low smoke halogen-free flame retardant performance and good extrusion performance, and is applicable to manufacturing of flame retardant gland strips used in doors and windows for building and vehicles.

Description

technical field [0001] The invention relates to a low-smoke, halogen-free, flame-retardant EPDM rubber and a preparation method thereof by extrusion molding, which is suitable for manufacturing flame-retardant sealing strips for building doors and windows and vehicle doors and windows. Background technique [0002] Due to its excellent elasticity (sealing performance), heat resistance, and weather resistance, EPDM is often used in the manufacture of sealing strips for building doors and windows, and vehicle doors and windows, and has a long service life. With the improvement of fire safety requirements, more and more applications now require the rubber materials used to be flame retardant, especially the rubber materials used in the construction field, subway high-speed trains and other crowded places require excellent flame retardant performance, It is also required that the rubber material is low-smoke and non-toxic when burning, and does not cause secondary pollution and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L51/06C08L23/08C08L23/20C08K13/06C08K3/22C08K3/04C08K3/38C08K9/10C08L83/04B29C47/00B29C47/92B29C71/02B29C71/04E06B7/22B60J10/02B60J10/08B29C48/92B60J10/70B60J10/80
CPCB29C48/397B29C48/92B29C2948/92704B29C2948/9259B29C2948/92885B29C2948/92895B29C2948/92904
Inventor 田明李波张立群吕庆贡健尤连兴
Owner BEIJING UNIV OF CHEM TECH
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