Balancing composition

• US 5,431,726 A
• Filed: 08/01/1991
• Issued: 07/11/1995
• Est. Priority Date: 11/09/1990
• Status: Expired due to Term

• Current Assignee: Lars Bertil Carnehammar, Performance Products Corporation
• Original Assignee: Performance Products Corporation
• Inventors: Ronlan, Alvin
• Primary Examiner(s): Brunsman, David
• Application Number:
  US07/733,885
• Time in Patent Office: 1,440 Days
• Field of Search: 106/266, 524/166
• US Class Current: 106/266
• CPC Class Codes: B60C 19/003 Balancing means attached to the tyre
• CPC Class Codes: B60C 5/004 filled at least partially with liquid B60C19/12 takes precedence
• CPC Class Codes: C10M 101/02 Petroleum fractions
• CPC Class Codes: C10M 101/04 Fatty oil fractions
• CPC Class Codes: C10M 105/38 of polyhydroxy compounds
• CPC Class Codes: C10M 107/06 containing propene
• CPC Class Codes: C10M 107/34 Polyoxyalkylenes
• CPC Class Codes: C10M 113/10 Clays; Micas
• CPC Class Codes: C10M 113/12 Silica
• CPC Class Codes: C10M 113/16 Inorganic material treated with organic compounds, e.g. coated
• CPC Class Codes: C10M 117/00 Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
• CPC Class Codes: C10M 143/00 Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation
• CPC Class Codes: C10M 143/06 containing butene
• CPC Class Codes: C10M 145/14 Acrylate; Methacrylate
• CPC Class Codes: C10M 169/00 Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
• CPC Class Codes: C10M 2201/103 Clays; Mica; Zeolites
• CPC Class Codes: C10M 2201/1036 used as thickening agents
• CPC Class Codes: C10M 2201/105 Silica
• CPC Class Codes: C10M 2201/14 inorganic compounds surface treated with organic compounds
• CPC Class Codes: C10M 2201/145 used as thickening agents
• CPC Class Codes: C10M 2203/10 : Petroleum or coal fractions, e.g. tars, solvents, bitumen
• CPC Class Codes: C10M 2203/1006 : used as base material
• CPC Class Codes: C10M 2203/102 : Aliphatic fractions
• CPC Class Codes: C10M 2203/1025 : used as base material
• CPC Class Codes: C10M 2203/1045 : used as base material
• CPC Class Codes: C10M 2203/1065 : used as base material
• CPC Class Codes: C10M 2203/1085 : used as base material
• CPC Class Codes: C10M 2205/00 : Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
• CPC Class Codes: C10M 2205/02 : containing acyclic monomers
• CPC Class Codes: C10M 2205/024 : Propene
• CPC Class Codes: C10M 2205/0245 : used as base material
• CPC Class Codes: C10M 2205/026 : Butene
• CPC Class Codes: C10M 2205/04 : containing aromatic monomers, e.g. styrene
• CPC Class Codes: C10M 2205/06 : containing conjugated dienes
• CPC Class Codes: C10M 2207/106 : used as thickening agents
• CPC Class Codes: C10M 2207/1206 : used as thickening agents
• CPC Class Codes: C10M 2207/1406 : used as thickening agents
• CPC Class Codes: C10M 2207/2613 : used as thickening agents
• CPC Class Codes: C10M 2207/2626 : used as thickening agents
• CPC Class Codes: C10M 2207/2835 : used as base material
• CPC Class Codes: C10M 2207/401 : used as base material
• CPC Class Codes: C10M 2207/4045 : used as base material
• CPC Class Codes: C10M 2209/084 : Acrylate; Methacrylate
• CPC Class Codes: C10M 2209/1033 : used as base material
• CPC Class Codes: C10M 2209/1045 : used as base material
• CPC Class Codes: C10M 2209/105 : of alkylene oxides containing three carbon atoms only
• CPC Class Codes: C10M 2209/1055 : used as base material
• CPC Class Codes: C10M 2209/1065 : used as base material
• CPC Class Codes: C10M 2209/1075 : used as base material
• CPC Class Codes: C10M 2209/1085 : used as base material
• CPC Class Codes: C10M 2209/1095 : used as base material
• CPC Class Codes: C10N 2020/01 : Physico-chemical properties
• CPC Class Codes: C10N 2040/00 : Specified use or application for which the lubricating composition is intended
• CPC Class Codes: C10N 2040/30 : Refrigerators lubricants or compressors lubricants
• CPC Class Codes: C10N 2040/32 : Wires, ropes or cables lubricants
• CPC Class Codes: C10N 2040/34 : Lubricating-sealants
• CPC Class Codes: C10N 2040/36 : Release agents or mold release agents
• CPC Class Codes: C10N 2040/38 : Conveyors or chain belts
• CPC Class Codes: C10N 2040/40 : Generators or electric motors in oil or gas winning field
• CPC Class Codes: C10N 2040/42 : Flashing oils or marking oils
• CPC Class Codes: C10N 2040/44 : Super vacuum or supercritical use
• CPC Class Codes: C10N 2040/50 : Medical uses

Abstract

A tire gel balancing composition having a Storage modulus of between 3000 and 15000 Pa and the Specific Gravity less than 1000 kg/m³ in the temperature range between -20° and +90° C., preferably its Storage modulus is about 9000 Pa, is capable of balancing tires by being able to flow under the vibrations caused by imbalance in a wheel assembly. The composition preferably comprises a mixture of: 1) paraffinic oils, polybutene oils, polyol esters, including castor oil, or polyol ethers; 2) hydrophobic or hydrophilic fumed silica; 3) polyalkyl-methacrylates, styrene-ethylene-propylene block copolymers or polyhydroxycarboxylic acid derivatives; and optionally corrosion inhibitors and antioxidants.

Claims

1. A tire balancing gel composition, comprising:

(a) about 80-95 % by weight of an oil component selected from the group consisting of castor oil,

(b) about 4-15% by weight of a gel former component selected from the group consisting of hydrophilic fumed silica, hydrophobic fumed silica, polydimethylsiloxane coated fumed silica, and mixtures thereof; and

,

(c) about 1-5 % by weight of a viscosity index improving agent component selected form the group consisting of poly-alkyl-methacrylates, styrene-ethylene-butylene-styrene block copolymers, styrene-ethylene-propylene block copolymers, polyisobutylenes, ethylene-propylene copolymers, hydrogenated butadiene-styrene-copolymers, polymers of fumaric acid esters and maleic acid esters, polyhydroxycarboxylic acid esters or amides, and mixtures thereof,

in which said components (a), (b) and (c) are provided in said effective amount to gel said tire balancing gel composition and such that said gel undergoes a transformation from gel state to liquid state when subject to an effective amount of vibrational pressures.

2. The tire balancing gel composition of claim 1, in which the specific gravity is less than about 1000 kg/m³ at about 22°

C.

3. The tire balancing gel composition of claim 2, in which the critical yield stress value is greater than about 15 Pa at about 22°

C., the storage modulus value is between about 3000-15000 Pa at about 22°

C., and the loss modulus value is less than or equal to the storage modulus value.

4. The tire balancing gel composition of claim 3, in which said critical yield stress value is greater than about 25 Pa.

5. The tire balancing gel composition of claim 3, in which said storage modulus value is about 9500 Pa.

6. The tire balancing gel composition of claim 3, in which said gel remains functional within a temperature range between about -30°

to +90°

C.

7. The tire balancing gel composition of claim 2, in which the evaporation loss value is less than about 6% by weight after about 10 hours at 99°

C.

8. The tire balancing gel composition of claim 2, in which the oil separation value is less than about 1% after about 24 hours at 125×

g and 100°

C.

9. The tire balancing gel composition of claim 1, further comprising other additive agents selected from the group consisting of antioxidants and corrosion inhibitors.

10. The tire balancing gel composition of claim 1, in which said oil component (a) comprises castor oil, said gel former component (b) comprises hydrophilic or hydrophobic fumed silica, and said viscosity improving agent component (c) comprises polyhydroxycarboxylic acid amide.

11. The tire balancing gel composition of claim 1, in which said viscosity index improving agent component (c) is selected from the group consisting of (i) poly-alkyl-methacrylates, (ii) styrene-ethylene-butylene-styrene block copolymers and styrene-ethylene-propylene block copolymers, (iii) polyisobutylenes, and, (iv) polyhydroxycarboxylic acid esters or amides.

12. A tire balancing gel composition, comprising:

(a) about 80-95% by weight of an oil component comprising castor oil;

(b) about 4-15% by weight of a gel former component comprising fumed silica; and

, (c) about 1-5% by weight of a viscosity index improving agent component comprising polyhydroxycarboxylic acid amide, in which said components (a), (b) and (c) are provided in said effective amount to gel said tire balancing gel composition and such that said gel undergoes a transformation from gel state to liquid state when subject to an effective amount of vibrational pressures.

13. The tire balancing gel composition of claim 12, in which the specific gravity is less than about 1000 kg/m³ at about 22°

C.

14. The tire balancing gel composition of claim 13, in which the critical yield stress value is greater than about 15 Pa at about 22°

C., the storage modulus value is between about 3000-15000 Pa at about 22°

C., and the loss modulus value is less than or equal to the storage modulus value.

15. The tire balancing gel composition of claim 14, in which the evaporation loss is less than about 6% by weight after about 10 hours at 99°

C.

16. The tire balancing gel composition of claim 14, in which the oil separation is less than about 1% by weight after about 24 hours at 125×

g and 100°

C.

17. The tire balancing gel composition of claim 12, in which the BET surface area of said fumed silica is between about 50-400 m² /g.

18. The tire balancing gel composition of claim 12, in which the gel former component (b) fumed silica is hydrophobic fumed silica.

19. The tire balancing gel composition of claim 12, in which said oil component (a) is castor oil having a pour point value of less than about 2°

C., a specific gravity of about 950 kg/m³ and a kinematic viscosity value of about 25 cSt at about 25°

C.

20. The tire balancing gel composition of claim 12, in which said gel remains functional within a temperature range between about -30°

to +90°

C.

21. The tire balancing gel composition of claim 12, further comprising other additive agents selected from the group consisting of antioxidants and corrosion inhibitors.