Tire balancing composition
AssigneeAlber GmbH
InventorAlvin Ronlan
Life of this patent
Estimating the term…
Abstract
A thixotropic tire balancing composition having a yield stress value between 30 Pa and 260 Pa, preferably about 120 Pa, is capable of balancing air by being capable of flowing under the influence of the vibrations induced when a heavy spot on the tire contacts the road surface. The composition preferably comprises a mixture of: (1) a liquid di- or trihydric alcohol or a di-, tri-, or tetrameric oligomer thereof, optionally containing water; (2) a polymer soluble or dispersible in the alcohol; (3) hydrophilic fibers; and, optionally, ( 4) a hydrophilic filler. The alcohol 1) is preferably a diol of the general formula HO-(CH(R)-CH.sub.2 -O).sub.n -H wherein R is hydrogen or C.sub.1-2 alkyl and n is an integer from 1 to 4.
Claims30
A thixotropic tire balancing composition having a yield stress value between 30 Pa and 260 Pa at temperatures between -30.degree. C. and +90.degree. C. comprising the following components:
- (1) a liquid di- or trihydric alcohol, a di-, tri- or tetrameric oligomer of said alcohol or a mixture of water and said alcohol or said oligomer;
- (2) a polymer which is soluble or dispersible in component (1) selected from the group consisting of C.sub.1-3 alkyl cellulose, hydroxy-C.sub.1-3 alkyl cellulose, carboxymethyl cellulose, a polymer of an acid of the general formula R.sub.1 HC=C(R.sub.2)COOH wherein R.sub.1 and R.sub.2 are independently hydrogen, C.sub.1-2 alkyl, hydroxy-C.sub.1-4 alkyl or carboxy-C.sub.1-4 alkyl and mixtures thereof;
- and
- (3) a hydrophilic fiber selected from the group consisting of viscose, cotton, wool, cellulose, silk, a hemp fiber and mixtures thereof.
The composition as claimed in claim 11, in which component (1) is a liquid alcohol, wherein the alcohol is a diol of the general formula HO-(CH(R)-CH.sub.2 -O).sub.n -H, wherein R is hydrogen or C.sub.1-2 alkyl and n is an integer from 1 to 4.
The composition as claimed in claim 11, which further comprises component (4), wherein component (4) is a hydrophilic filler which is insoluble in water and component (1).
The composition as claimed in 14 in which the buffering agent of component (5) is a soluble hydroxide, an amine or an amine derivative.
The composition as claimed in 15 in which the buffering agent is selected from the group consisting of NaOH, NH.sub.4 OH, triethanol amine, diethanol amine and mixtures thereof.
A method for preparing a thixotropic tire balancing composition having a yield stress value between 30 Pa and 260 Pa at temperatures between -30.degree. C. and +90.degree. C. comprising a reaction product produced by reacting a reaction mixture, which comprises forming a reaction mixture comprising:
- (1) a liquid di- or trihydric alcohol, a di-, tri- or tetrameric oligomer of said alcohol or a mixture of water and said alcohol or said oligomer;
- (2) a polymer containing free carboxy groups and which is soluble or dispersible in component (1) selected from the group consisting of carboxymethyl cellulose, a polymer of an acid of the general formula R.sub.1 HC=C(R.sub.2)COOH wherein R.sub.1 and R.sub.2 are independently hydrogen, C.sub.1-2 alkyl, hydroxy-C.sub.1-4 alkyl or carboxy-C.sub.1-4 alkyl and mixtures thereof;
- and
- (3) a hydrophilic fiber optionally containing free hydroxy groups selected from the group consisting of viscose, cotton, a cellulose fiber and mixtures thereof, said method comprising the following steps:
- (a) dispersing the hydrophilic fiber of component (3) in component (1);
- (b) adding the polymer of component (2);
- (c) stirring until a homogenous mixture is obtained forming the reaction mixture, adding a cross-linking catalyst to the reaction mixture and subjecting said reaction mixture to a crosslinking reaction;
- (d) optionally dispersing component (4), wherein component (4) is a hydrophilic filler which is insoluble in water and component (1), in the resulting product of the crosslinking reaction of step (c);
- and optionally
- (e) inactivating the crosslinking catalyst.
A method for preparing a thixotropic tire balancing composition having a yield stress value between 30 Pa and 260 Pa at temperatures between -30.degree. C. and +90.degree. C. comprising the following components:
- (1) a liquid di- or trihydric alcohol, a di-, tri- or tetrameric oligomer of said alcohol or a mixture of water and said alcohol or said oligomer;
- (2) a polymer which is soluble or dispersible in component (1) selected from the group consisting of C.sub.1-3 alkyl cellulose, hydroxy-C.sub.1-3 alkyl cellulose, carboxymethyl cellulose, a polymer of an acid of the general formula R.sub.1 HC=C(R.sub.2)COOH wherein R.sub.1 and R.sub.2 are independently hydrogen, C.sub.1-2 alkyl, hydroxy-C.sub.1-4 alkyl or carboxy-C.sub.1-4 alkyl and mixtures thereof;
- and
- (3) a hydrophilic fiber selected from the group consisting of viscose, cotton, wool, cellulose, silk, a hemp fiber and mixtures thereof;
- and optionally
- (4) a hydrophilic filler which is insoluble in water and component (1), said method comprising the following steps:
- (a) dispersing the hydrophilic fiber of component (3) in component (1);
- (b) adding the polymer of component (2);
- (c) stirring until a homogenous mixture is obtained;
- and optionally
- (d) dispersing the hydrophilic filler of component (4) in said mixture.
A thixotropic tire balancing composition having a yield stress value between 30 pa and 260 Pa at temperatures between -30.degree. C. and +90.degree. C. consisting essentially of the following components:
- (1) a liquid di or trihydric alcohol, a di-, tri- or tetrameric oligomer of said alcohol or a mixture of water and said alcohol or said oligomer;
- (2) a polymer which is soluble or dispersible in component (1) selected from the group consisting of C.sub.1-3 alkyl cellulose, hydroxy-C.sub.1-3 alkyl cellulose, carboxymethyl cellulose, a polymer of an acid of the general formula R.sub.1 HC=C(R.sub.2)COOH wherein R.sub.1 and R.sub.2 are independently hydrogen, C.sub.1-2 alkyl, hydroxy-C.sub.1-4 alkyl or carboxy-C.sub.1-4 alkyl and mixtures thereof;
- and
- (3) a hydrophilic fiber selected from the group consisting of viscose, cotton, wool, cellulose, silk, a hemp fiber and mixtures thereof.
Dependencies are inferred from the claim text.