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Intumescent seal

A technology of expansion and sealing parts, which is applied in the direction of sealing devices, vehicle parts, diaphragms, etc., and can solve problems such as difficult-to-form strips

Inactive Publication Date: 2008-12-24
詹保罗·贝努西 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014]A disadvantage of this prior art sealant is that it cannot be easily formed into strips, so it must be applied in the molten state and placed directly on the door frame or window frame

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] A 16 mm co-rotating twin-screw extruder was fed 400 g / h of EVA with a melt index of 3 and 40% acetate, 300 g / h of neutral expandable graphite (NGS), 250 g of melamine borate via a metering feeder (Brabender twin-screw) / h, ammonium polyphosphate 50g / h, aluminum oxide hydrate 50g / h, carbon black 1g / h, so as to obtain a base material with a thickness of 2mm and a width of 30mm. The expansion properties were determined by measuring the expansion ratio, ie the ratio between the final height and the initial height of a 50 mm diameter sample placed in a muffle furnace at 350°C, 450°C and 550°C for 30 minutes respectively.

[0089] In this measurement, the sample is placed at the bottom of a steel cylinder of the same diameter. The measurement is made both on a sample that expands freely (free expansion) and also on a sample with a weight of 100 g placed thereon (expansion under load). The results are shown in Table 1.

[0090] Table 1

[0091] temperature

[009...

Embodiment 2-15

[0095] Using the extruder and measurement system of Example 1, seals were prepared from the blends shown in Tables 2, 3 and 4, and measurements were taken to provide the expansion results shown in these tables. In these tables, vinyl acetate-containing polymers are conveniently characterized by two numbers, the melt index (MI) according to ASTM, and the amount of vinyl acetate present. For example 3 / 40 means a melt index of 3 and 40% vinyl acetate.

[0096] The expanded graphite used in the following examples is sold by Faima (Milan, Italy), UCAR (USA), NGS (Germany).

[0097] Table 2

[0098] Example

[0099] 450℃

[0100] table 3

[0101] Example

[0102] Table 4

[0103] Example

[0104] refer to figure 1 and 2Two expansion sealing strips 1, 2 of 20 mm wide and 1.5 mm high extruded from the formulations of Examples 1, 3, 6, 15, 16 have been placed on the sides 3, 2 of the two frames 5, 6 at a distance of 20 mm. 4, the frame is...

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Abstract

A flexible intumescent seal for passive fire protection has a base material that consists of a blend comprising at least one thermoplastic polymer, expandable graphite and at least one acid generating compound. The acid generating compound is an organic boron compound and the at least one thermoplastic polymer is a vinyl polymer and / or copolymer. The seal may be formed by extrusion, drawing, molding or injection of the blend.

Description

technical field [0001] The present invention relates to flexible seals formed from intumescent materials, in strip or extruded form, for use in fire resistant door and window frames. [0002] Such door and window frames may be part of fire-resistant structures or barriers for passive fire protection. Background technique [0003] According to the latest fire protection standards, buildings are divided into sections or compartments by means of fire barriers which have the dual purpose of preventing the spread of fire to unaffected areas and extinguishing the fire by removing the required combustion air. [0004] Therefore, the flame retardant system or the door and window frames of the barrier will prevent the spread of flames and hot smoke from combustion to other parts of the building. This fume may be toxic and present an additional source of ignition. [0005] Ultimately, these door and window frames are fitted with so-called intumescent seals, which expand when heated,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10C09K21/14C08K5/00C08K3/38C08K3/04C08K3/00
CPCC09K3/10C09K21/14C09K2200/0625F16J3/02
Inventor 詹保罗·贝努西圭多·尼德尧弗内詹弗兰科·萨伊
Owner 詹保罗·贝努西
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