SEALING COMPOSITIONS, METHOD AND USE FOR SEALING A SERVICE PENETRATION

Abstract

A method of sealing a service penetration in a structure, the method comprising applying a sealant composition around the service penetration on an exterior surface of the structure, wherein the penetration sealant composition comprises: from 5 to 40 wt % of a filler; from 20 to 80 wt % of a silicone polymer; and from 10 to 60 wt % of fire retardant compound.

Claims

1. A method of sealing a service penetration in a structure, the method comprising applying a sealant composition around the service penetration on an exterior surface of the structure, wherein the penetration sealant composition comprises: from 5 to 40 wt % of a filler; from 20 to 80 wt % of a silicone polymer; and from 10 to 60 wt % of fire retardant compound.

2. A method according to claim 1 wherein the filler combines dolomite.

3. A method according to claim 1 or wherein the silicone polymer has a weight average molecular weight of from 200000 to 800000.

4. A method according to claim 1, wherein the silicone polymer has dynamic viscosity of greater than 9000000 mPa.Math.s.

5. A method according to claim 1, wherein the silicone polymer is selected from polydimethylsiloxane, divinyl polydimethylsiloxane or mixtures thereof.

6. A method according to claim 1, wherein the fire retardant compound comprises aluminium trihydroxide.

7. A method according to claim 1, wherein the penetration sealant composition comprises from 10 to 30 wt % of dolomite, from 30 to 60 wt % of silicone polymer, from 35 to 40 wt % of aluminium trihydroxide, and from 0.5 to 3 wt % of plasticiser silicone oil.

8. A penetration sealant composition comprising: from 5 to 40 wt % of a filler; from 20 to 80 wt % of a silicone polymer; and from 10 to 60 wt % of fire retardant compound.

9. (canceled)

10. The penetration sealant composition of claim 8, wherein the filler combines dolomite.

11. The penetration sealant composition of claim 8, wherein the silicone polymer has a weight average molecular weight of from 200000 to 800000.

12. The penetration sealant composition of claim 8, wherein the silicone polymer has dynamic viscosity of greater than 9000000 mPa.Math.s.

13. The penetration sealant composition of claim 8, wherein the silicone polymer is selected from polydimethylsiloxane, divinyl polydimethylsiloxane or mixtures thereof.

14. The penetration sealant composition of claim 8, wherein the fire retardant compound comprises aluminium trihydroxide.

15. A penetration sealant composition comprising: from 10 to 30 wt % of dolomite; from 30 to 60 wt % of a silicone polymer; from 35 to 40 wt % of aluminium trihydroxide; and from 0.5 to 3 wt % of plasticiser silicone oil.

Description

EXAMPLE 1

[0091] Composition A was prepared comprising the following components:

[0092] Dolomite18 wt %

[0093] Aluminium tirhydroxide36 wt %

[0094] Polydimethylsiloxane (M.sub.w approx. 600000)44 wt %

[0095] Silicone oil2 wt %

[0096] The composition was tested according to ETAG026 at a third party UKAS accredited fire safety laboratory.

[0097] Various services were fitted through a partition according to European standard EN1366. The seal around the service was made by applying composition A on an external surface of each side of the partition and the partition was fitted into a furnace. Thermocouples readings from the seal, the partition and the service were recorded during the test. The time taken for the fire to penetrate the wall was measured. The intergrity and insulation ratings were recorded and are detailed in the table below for the services specified.

[0098] Target EI is the time (in minutes) that the product was aiming to reach for integrity (E) and insulation (I) of the seal. The integrity is the time for which the service remains sealed. The insulation is the time taken for the temperature to exceed an average temperature of 140 C. above the ambient temperature at the start of the test. This is detailed in EN1363 Part 1.

TABLE-US-00001 Result Result Target E EI Service Seal description Service insulation EI (min) (min) Cable bundle F 75 mm Composition |A 60 121 121 Cable D.1 applied on 60 126 65 Cable D.2 exterior surface 60 126 71 Cable D.3 60 69 64 4 mm steel pipe C/U minimum 60 126 89 size/wt 30 mm steel pipe C/U max dia 60 121 121 min wt 6 mm copper pipe C/C 60 126 126 minimum size/wt 12 mm copper pipe C/C max 60 126 68 dia min wt 16 mm alupex pipe C/C 60 121 121 minimum size/wt 20 mm alupex pipe C/C max dia 60 126 101 min wt 40 1.0 mm steel pipe C/U Full length 20 mm 60 121 121 (minimum size) stonewool pipesection 80 kg/m3 penetrating aperture 324 4.5 mm steel pipe C/U Full length 30 mm 60 121 86 (minimum wall thickness) stonewool pipesection 80 kg/m3 penetrating aperture 324 4.5 mm steel pipe C/U Full length 80 mm 60 120 108 (minimum wall thickness) stonewool pipesection 80 kg/m3 penetrating aperture 40 1.0 mm steel pipe C/U Interrupted 20 mm 60 121 121 (minimum size) 50 cm stonewool pipesection 80 kg/m3 against fireseal 324 4.5 mm steel pipe C/U Interrupted 30 mm 60 121 121 (minimum wall thickness) 50 cm stonewool pipesection 80 kg/m3 against fireseal 12 1.0 mm copper pipe C/C Full length 20 mm 60 102 79 minimum size/wt stonewool pipesection 80 kg/m3 penetrating aperture 54 1.5 mm copper pipe C/C Full length 30 mm 60 121 87 max dia min wt stonewool pipesection 80 kg/m3 penetrating aperture 54 1.5 mm copper pipe C/C Full length 80 mm 60 94 90 max dia min wt stonewool pipesection 80 kg/m3 penetrating aperture 12 1.0 mm copper pipe C/C Interrupted 20 mm 60 102 76 minimum size/wt 50 cm stonewool pipesection 80 kg/m3 against fireseal 54 1.5 mm copper pipe C/C Interrupted 20 mm 60 102 76 max dia min wt 50 cm stonewool pipesection 80 kg/m3 against fireseal