GB2370574A - Tyre puncture sealant and method of manufacture - Google Patents

Tyre puncture sealant and method of manufacture Download PDF

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Publication number
GB2370574A
GB2370574A GB0125845A GB0125845A GB2370574A GB 2370574 A GB2370574 A GB 2370574A GB 0125845 A GB0125845 A GB 0125845A GB 0125845 A GB0125845 A GB 0125845A GB 2370574 A GB2370574 A GB 2370574A
Authority
GB
United Kingdom
Prior art keywords
gt
lt
kg
sep
puncture sealant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0125845A
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GB0125845D0 (en
Inventor
Donald Daisley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Faversham Industries Ltd
FAVERSHAM IND Ltd
Original Assignee
Faversham Industries Ltd
FAVERSHAM IND Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to GB0026314A priority Critical patent/GB0026314D0/en
Application filed by Faversham Industries Ltd, FAVERSHAM IND Ltd filed Critical Faversham Industries Ltd
Publication of GB0125845D0 publication Critical patent/GB0125845D0/en
Publication of GB2370574A publication Critical patent/GB2370574A/en
Application status is Withdrawn legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C73/00Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
    • B29C73/16Auto-repairing or self-sealing arrangements or agents
    • B29C73/163Sealing compositions or agents, e.g. combined with propellant agents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00Pneumatic or solid tyres or parts thereof

Abstract

A method of manufacture of a tyre puncture sealant contains the following steps: A) Add to a primary vessel the ingredients: <SL> <LI>(i) 1200 litres of water <LI>(ii) 280 kg of urea <LI>(iii) 17.5 kg of sodium nitrite <LI>(iv) 2 kg of an anti-foam emulsion; </SL> B) Stir thoroughly until (ii), (iii) and (iv) are completely dissolved in the water; C) Add to the primary vessel: <SL> <LI>(v) 0.450 kg of BENTONITE <LI>(vi) 100 kg of calcium carbonate <LI>(vii) 150 kg of rubber crumb <LI>(viii) 0.5 kg of FLUOROSCEIN <LI>(ix) 15 kg of a preservative <LI>(x) 446 litres of polyvinyl alcohol (PVA); </SL> D) Stir into primary vessel until thoroughly mixed; E) Add the following to a secondary vessel; <SL> <LI>(xi) 484 kg of glycol alcohol <LI>(xii) 4.10 kg of hydroxyethyl cellulose <LI>(xiii) 9.20 kg of xanthan gum; </SL> F. Mix (xi), (xii) and (xiii) and add this mixture to primary vessel; and G. Agitate contents of primary vessel for 30 minutes. A sealant composition is also claimed per se.

Description

TYRE PUNCTURE SEALANTS BACKGROUND OF THE INVENTION This invention relates to tyre puncture sealants, particularly but not exclusively for sealants for repairing punctures in pneumatic tyres for vehicles. The sealant of the present invention may also be used as described, or in modified form, to seal around the rim of a wheel Various tyre sealants have been proposed and it is one object of the present invention to provide an improved tyre sealant having an enhanced and reliable performance in use.

SUMMARY OF THE INVENTION According to one aspect of the present invention a method of manufacture of a tyre puncture sealant comprises the following steps: 1. Add to a primary vessel the ingredients: A) 1200 litres of water B) 280 kg of urea C) 17.5 kg of sodium nitrite D) 2 kg of an anti foam emulsion 2. Stir thoroughly until B), C) and D) are completely dissolved in the water; 3. Add to the primary vessel: E) 0.450 kg of BENTONITE F) 100 kg of calcium carbonate G) 150kg of rubber crumb H) 0.5 kg ofFLUOROSCEIN J) 15 kg of a preservative K) 446 litres of polyvinyl alcohol (PVA) 4. Stir into primary vessel until thoroughly mixed; 5. Add the following to a secondary vessel; L) 484 kg of glycol alcohol M) 4.10 kg of a hydroxyethyl cellulose N) 9.20 kg ofxanthan gum; 6. Mix L), M) and N) and add this mixture to primary vessel; and 7. Agitate contents of primary vessel for 30 minutes.

In practise the above method produces 2500 litres of sealant of which, for example, between 250 ml and 1 litre may be used to seal punctures in a variety of typical tyre sizes.

The primary vessel is usually provided by a large agitation vessel having mixing blades or the like.

The Urea which is preferably a powder, commonly a concentrate fertiliser such as carbamide or carbamide resin.

Preferably the anti-foam emulsion is a silicone anti-foam emulsion such as polydimethylsiloxine. <img class="EMIRef" id="024179796-00030001" />

<tb>

In <SEP> a <SEP> preferred <SEP> from <SEP> the <SEP> Bentonite <SEP> is <SEP> a <SEP> mixture <SEP> containing <SEP> Spi02, <tb> Al203, <SEP> Fe203 <SEP> and <SEP> the <SEP> oxides <SEP> of <SEP> Calcium, <SEP> Magnesium, <SEP> Potassium <SEP> and <tb> Sodium.

The rubber crumb is preferably of a mixed particle size to encourage tighter bonding, the various particle sizes pack together with fewer gaps. In one embodiment 75g of the rubber crumb is of an average particle size of between 0. 25mm and 1.70mm, the remaining 75g being of an average particle size of between 0. 15mm and 1. 00mm.

Any suitable preservative may be used such as Biocide RIO, a soluble substance based on a combination ofhemiacetals.

In one embodiment the glycol alcohol is a nonethylene glycol, also known as 1, 2-Ethanediol.

According to another aspect of the present invention a tyre puncture sealant comprises the following: A) 1200 litres of water B) 280 kg of urea C) 17.5 kg of sodium nitrite D) 2 kg of an anti foam emulsion E) 0.450 kg of BENTONITE F) 100 kg of calcium carbonate G) 150kg of rubber crumb H) 0. 5 kg of FLUOROSCEIN J) 15 kg of a preservative K) 446 litres of polyvinyl alcohol (PVA) L) 484 kg of glycol alcohol M) 4.10 kg of a hydroxyethyl cellulose, and N) 9. 20 kg of xanthan gum ; According to a further aspect of the present invention a tyre puncture sealant comprises the following: A) 1200 litres of water; B) 280 kg of UREA-PRILLS U-TEC ; C) 17.5 kg of sodium nitrite; D) 2 kg of ANTI-F SEA 30%; E) 0. 450 kg of BENTONITE ; F) 100 kg of DURCAL 15 ; G) 75 kg of RUBBER 20# ; H) 75 kg of RUBBER 12# I) 0.5 kg ofFLUOROSCEIN ; J) 15 kg of BIOCIDE R10 ; K) 446 litres of PVA 10%; L) 484 kg of MONO ETHY GLY ; M) 4.10 kg of TYLOSE H6000YP2; and N) 9.20 kg ofKELZAN. A number of tests have been conducted using the sealant, representative examples are given below. EXAMPLE 1 In stable conditions at a temperature of 23 a tubeless radial tyre, in this case a UNIROYAL MAX 400, size-215/70R 15C 109/107P was injected with 1 litre of sealant and punctured using a spike having a diameter of 6 mm. Upon removal of the spike resealing of the tyre was achieved by repeated bouncing of the tyre on a surface, in this case a hard floor.

Subsequently the tyre was subjected to progressive increases in gas pressure, using an oxygen free gas, in this case N2 in 10psi increments up to 160psi and held at that pressure for 2 minutes. The gas pressure was reduced and a further five punctures induced in the tread surface with the same spike as before. Resealing was once again induced by repeated bouncing of the tyre. A second stepped pressure increase was conducted in the same increments as before again to 160psi and held at that pressure for 2 minutes.

It was found that the tyre with six 6 mm punctures withstood the pressure applied and showed no leakage or pressure loss during both periods of increased pressure.

The same tyre was subsequently subjected to some 40 separate punctures using a variety of differently sized nails and spikes applied at random about the tyre's circumference as well as re-penetrating the six punctures from the first part of the test. The tyre was pressurised to a nominal level and the sealant applied by bouncing the tyre. Further pressurisation of the tyre to 45psi was applied and the tyre left isolated for a period of 10 days during which periodic test were conducted for pressure loss. The tyre showed no evidence of leakage or pressure loss. EXAMPLE 2 In the second example a good quality 185/60R 14 (82H) tyre was mounted on a suitable rim and injected with 250 ml of sealant. The tyre was then inflated to 41 psi and conditioned in a test area at a temperature between 20'to 30'C. In six locations across the crown are of one position on the tyre a 6 mm diameter spike was hammer driven into and removed from the tyre, the tyre was then rotated to allow the sealant to seal the penetrations and the try re-pressurised to 41 psi.

The tyre was then tested at a speed of 70 mph for a simulated distance of 25,000 miles with a load of 380 kg applied during the test. Tyre pressures measured immediately after the test and after a cooling period of 24 hours showed that the sealant had effectively sealed the punctures.

Claims (24)

1. A method of manufacture of a tyre puncture sealant comprising the following steps : A) Add to a primary vessel the ingredients: (i) 1200 litres of water (ii) 280 kg of urea (iii) 17.5 kg of sodium nitrite (iv) 2 kg of an anti-foam emulsion; B) Stir thoroughly until (ii), (iii) and (iv) are completely dissolved in the water; C) Add to the primary vessel: (v) 0. 450 kg of BENTONITE (vi) 100 kg of calcium carbonate (vii) 150 kg of rubber crumb (viii) 0.5 kg ofFLUOROSCEIN (ix) 15 kg of a preservative (x) 446 litres of polyvinyl alcohol (PVA) D) Stir into primary vessel until thoroughly mixed; E) Add the following to a secondary vessel; (xi) 484 kg of glycol alcohol (xii) 4.10 kg of hydroxyethyl cellulose (xiii) 9.20 kg ofxanthan gum; F. Mix (xi), (xii) and (xiii) and add this mixture to primary vessel; and G. Agitate contents of primary vessel for 30 minutes.
2. A method of manufacture of a tyre puncture sealant as in Claim 1 characterised in that the primary vessel is a large agitation vessel having mixing blades.
3. A method of manufacture of a tyre puncture sealant as in any preceding Claim characterised in that the urea is a powder containing carbamide.
4. A method of manufacture of a tyre puncture sealant as in any preceding Claim characterised in that the anti-foam emulsion is a silicone anti-foam emulsion.
5. A method of manufacture of a tyre puncture sealant as in Claim 4 characterised in that the silicone anti-foam emulsion is polydimethylsiloxine.
6. A method of manufacture of a tyre puncture sealant as in any preceding Claim characterised in that the ingredient known as Bentonite is a mixture containing Spi02, A1203, Fe203 and the oxides of Calcium, Magnesium, Potassium and Sodium.
7. A method of manufacture of a tyre puncture sealant as in any preceding Claim characterised in that the rubber crumb is of a mixed particle size.
8. A method of manufacture of a tyre puncture sealant as in Claim 7 characterised in that 75g of the rubber crumb is of an average <img class="EMIRef" id="024179797-00090001" />
<tb> particle <SEP> size <SEP> of <SEP> between <SEP> 0. <SEP> 25mm <SEP> and <SEP> 1. <SEP> 70mm, <SEP> the <SEP> remaining <SEP> 75g <SEP> being <SEP> of <SEP> an <tb> average <SEP> particle <SEP> size <SEP> of <SEP> between <SEP> 0. <SEP> 15mm <SEP> and <SEP> 1. <SEP> 00mm. <tb>
9. A method of manufacture of a tyre puncture sealant as in any preceding Claim characterised in that the preservative is a soluble substance based on a combination ofhemiacetals.
10. A method of manufacture of a tyre puncture sealant as in any preceding Claim characterised in that the glycol alcohol is a nonethylene glycol.
11. A tyre puncture sealant comprising the following: (i) 1200 litres of water (ii) 280 kg of urea (iii) 17.5 kg of sodium nitrite (iv) 2 kg of an anti foam emulsion (v) 0.450 kg of BENTONITE (vi) 100 kg of calcium carbonate (vii) 150kg of rubber crumb (viii) 0.5 kg ofFLUOROSCEIN (ix) 15 kg of a preservative (x) 446 litres of polyvinyl alcohol (PVA) (xi) 484 kg of glycol alcohol (xii) 4.10 kg of a hydroxyethyl cellulose, and (xiii) 9.20 kg ofxanthan gum.
12. A tyre puncture sealant as in any preceding Claim 11 characterised in that the urea is a powder containing carbamide.
13. A tyre puncture sealant as in either Claim 11 or Claim 12 characterised in that the anti-foam emulsion is a silicone anti-foam emulsion.
14. A tyre puncture sealant as in any one of Claims 11 to 13 characterised in that the silicone anti-foam emulsion is polydimethylsiloxine.
15. A tyre puncture sealant as in any one of Claims 11 to 14 characterised in that the ingredient known as Bentonite is a mixture containing Spi02, A1203, Fe203 and the oxides of Calcium, Magnesium, Potassium and Sodium.
16. A tyre puncture sealant as in any one of Claims 11 to 15 characterised in that the rubber crumb is of a mixed particle size.
17. A tyre puncture sealant as in Claim 16 characterised in that 75g of the rubber crumb is of an average particle size of between 0.25mm and 1.70mm, the remaining 75g being of an average particle size of between 0.15mm and 1.00mm.
18. A tyre puncture sealant as in any one of Claims 11 to 17 characterised in that the preservative is a soluble substance based on a combination ofhemiacetals.
19. A tyre puncture sealant as in any one of Claims 11 to 18 characterised in that the glycol alcohol is a nonethylene glycol.
20. A tyre puncture sealant as in Claim 11 characterised in that the ingredients are as following: A) 1200 litres of water; B) 280 kg of UREA-PRILLS U-TEC ; C) 17.5 kg of sodium nitrite; D) 2 kg of ANTI-F SEA 30%; E) 0.450 kg of BENTONITE ; F) 100 kg of DURCAL 15 ; G) 75 kg of RUBBER 20# ; H) 75 kg of RUBBER 12# I) 0.5 kg ofFLUOROSCEIN ; J) 15 kg of BIOCIDE RIO ; K) 446 litres of PVA 10%; L) 484 kg of MONO ETHY GLY ; M) 4.10 kg ofTYLOSE H6000YP2; and N) 9. 20 kg of KELZAN.
21. A tyre sealed by a sealant made in accordance with the methods of any one of Claims 1 to 10.
22. A tyre sealed by a sealant as in any one of Claims 11 to 20
23. A method of manufacture of a tyre puncture sealant as hereinbefore described.
24. A tyre puncture sealant as hereinbefore described.
GB0125845A 2000-10-27 2001-10-29 Tyre puncture sealant and method of manufacture Withdrawn GB2370574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0026314A GB0026314D0 (en) 2000-10-27 2000-10-27 Tyre puncture sealants

Publications (2)

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GB0125845D0 GB0125845D0 (en) 2001-12-19
GB2370574A true GB2370574A (en) 2002-07-03

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GB0026314A Ceased GB0026314D0 (en) 2000-10-27 2000-10-27 Tyre puncture sealants
GB0125845A Withdrawn GB2370574A (en) 2000-10-27 2001-10-29 Tyre puncture sealant and method of manufacture

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7048052B2 (en) 2001-01-24 2006-05-23 Schlumberger Technology Corporation Apparatus comprising expandable bistable tubulars and methods for their use in wellbores
US8230913B2 (en) 2001-01-16 2012-07-31 Halliburton Energy Services, Inc. Expandable device for use in a well bore
CN103146347A (en) * 2013-01-10 2013-06-12 赵金海 Complex liquid for repairing tire and application thereof
USRE45011E1 (en) 2000-10-20 2014-07-15 Halliburton Energy Services, Inc. Expandable tubing and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5364463A (en) * 1992-06-02 1994-11-15 Hull Jack L Tire ballast and sealant
US6013697A (en) * 1995-10-31 2000-01-11 Glaser-True Bike Route, Ltd. Tire sealant composition

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5364463A (en) * 1992-06-02 1994-11-15 Hull Jack L Tire ballast and sealant
US6013697A (en) * 1995-10-31 2000-01-11 Glaser-True Bike Route, Ltd. Tire sealant composition

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
WPI Abstract Accession No.1994-016737 [03] & CN 1069929 A *
WPI Abstract Accession No.1999-338325 [29] & CN 1210128 A *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE45099E1 (en) 2000-10-20 2014-09-02 Halliburton Energy Services, Inc. Expandable tubing and method
USRE45244E1 (en) 2000-10-20 2014-11-18 Halliburton Energy Services, Inc. Expandable tubing and method
USRE45011E1 (en) 2000-10-20 2014-07-15 Halliburton Energy Services, Inc. Expandable tubing and method
US8230913B2 (en) 2001-01-16 2012-07-31 Halliburton Energy Services, Inc. Expandable device for use in a well bore
US7048052B2 (en) 2001-01-24 2006-05-23 Schlumberger Technology Corporation Apparatus comprising expandable bistable tubulars and methods for their use in wellbores
US7168486B2 (en) 2001-01-24 2007-01-30 Schlumberger Technology Corporation Apparatus comprising expandable bistable tubulars and methods for their use in wellbores
CN103146347A (en) * 2013-01-10 2013-06-12 赵金海 Complex liquid for repairing tire and application thereof
CN103146347B (en) 2013-01-10 2014-08-13 赵金海 Complex liquid for repairing tire and application thereof

Also Published As

Publication number Publication date
GB0125845D0 (en) 2001-12-19
GB0026314D0 (en) 2000-12-13

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)