KR102247362B1 - Release Coating Composition for a Tire Bladder and Method of Preparing the Same - Google Patents

Abstract

The present invention relates to a release coating composition for a tire bladder and a method for producing the same, in particular, a) polydimethylsiloxane; b) sodium silicate reaction product with chloromethylsilane & isopropyl alcohol; c) titanium(IV)isopropoxide; d) N,N'N"-tributyl-1-methylsilanetriamine; e) hydrotreated heavy naphtha; And f) hydrogen-treated hard naphtha; It relates to a tire bladder release coating composition comprising a.
According to the present invention, excellent release effect can be exhibited even with a small coating amount, it can be used at any time of the year due to low sensitivity to temperature, good drying property can increase production efficiency, excellent scratch resistance, and , It is possible to provide a tire bladder release coating composition excellent in long-term storage stability.

Description

Release Coating Composition for a Tire Bladder and Method of Preparing the Same}

The present invention relates to a release coating composition for a tire bladder and a method for manufacturing the same, and particularly, it can exhibit excellent release effects even with a small coating amount, and can be used anytime in all four seasons due to low sensitivity to temperature, and production due to good drying properties The present invention relates to a tire bladder release coating composition that can increase efficiency, has excellent scratch resistance, and has excellent long-term storage stability, and a method of manufacturing the same.

The contents described below merely provide background information related to the present invention and do not constitute the prior art.

In general, a release coating agent for a tire bladder is used to ensure the stability of the manufactured tire itself as well as the stability in the process required in the tire manufacturing process before forming the tire during the tire manufacturing process. The release coating agent for tire bladder forms a thin film of a three-dimensional network structure on the surface of the tire bladder so that the air between the tire bladder and the semi-finished tire is effectively discharged so that the bladder can be easily inserted into the semi-finished tire. It effectively prevents adhesion between the inner liner and the bladder so that the semi-finished tire is effectively released and separated from the bladder after molding. Therefore, the tire bladder release agent does not cause chemical reactions with all types of rubber, and has excellent adhesion to the bladder, coating film strength and releasability, so it does not affect semi-finished tires during the tire vulcanization process, and has lubricity after the vulcanization process. It is necessary to facilitate the release and separation of the tire from the tire to maintain the stability of the tire quality and high production efficiency.

In particular, tire bladder release coatings are sensitive to moisture and temperature due to the specific nature of the product and require special attention for storage and storage. There are many difficulties in use, and improvements in drying, stretch resistance, and workability are constantly being requested, and improvement is urgently needed.

The present invention was conceived to solve the problems of the prior art as described above, and the present invention can exhibit an excellent release effect even with a small coating amount, and can be used anytime in all four seasons due to low sensitivity to temperature, and good drying properties. Thus, it is possible to increase production efficiency, has excellent scratch resistance, and has an object of providing a tire bladder release coating composition having excellent long-term storage stability and a method of manufacturing the same.

However, the problem to be solved by the present invention is not limited to those mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention

a) polydimethylsiloxane or vinylpolydimethylsiloxane;

b) sodium silicate reaction product with chloromethylsilane & isopropyl alcohol;

c) titanium(IV)isopropoxide;

d) N,N'N"-tributyl-1-methylsilanetriamine;

e) hydrotreated heavy naphtha; And

f) hydrotreated light naphtha;

It provides a tire bladder release coating composition comprising a.

Preferably, the tire bladder release coating composition is

a) 10-40 parts by weight of polydimethylsiloxane or vinyl polydimethylsiloxane;

b) 1 to 5 parts by weight of a sodium silicate reaction product with chloromethylsilane & isopropyl alcohol;

c) 1-5 parts by weight of titanium (IV) isopropoxide;

d) 1-5 parts by weight of N,N'N"-tributyl-1-methylsilanetriamine;

e) 10-35 parts by weight of hydrotreated heavy naphtha; And

f) 40-75 parts by weight of hydrotreated light naphtha;

Preferably, the a) polydimethylsiloxane is a polydimethylsiloxane having a viscosity of 45,000-55,000 cps.

Preferably, b) the sodium silicate reaction product with chloromethylsilane & isopropyl alcohol is silicon dioxide.

Preferably, d) N,N'N"-tributyl-1-methylsilanetriamine is aminoethyl aminopropylethoxysilane.

In addition, the present invention

a) polydimethylsiloxane or vinylpolydimethylsiloxane; b) sodium silicate reaction product with chloromethylsilane & isopropyl alcohol; c) titanium(IV)isopropoxide; d) N,N'N"-tributyl-1-methylsilanetriamine; e) hydrotreated heavy naphtha; And f) hydrogen-treated hard naphtha; provides a method for producing a tire bladder release coating composition, characterized in that uniformly mixed.

Preferably, the method for preparing the tire bladder release coating composition is

a) 10-40 parts by weight of polydimethylsiloxane or vinyl polydimethylsiloxane; b) 1 to 5 parts by weight of a sodium silicate reaction product with chloromethylsilane & isopropyl alcohol; c) 1-5 parts by weight of titanium (IV) isopropoxide; d) 1-5 parts by weight of N,N'N"-tributyl-1-methylsilanetriamine; e) 10-35 parts by weight of hydrotreated heavy naphtha; And f) 40-75 parts by weight of hydrotreated light naphtha;

According to the present invention, it is possible to exhibit an excellent release effect even with a small amount of coating, and can be used at any time of all four seasons due to low sensitivity to temperature, and it is possible to increase production efficiency due to good drying, and excellent scratch resistance. , It is possible to provide a tire bladder release coating composition excellent in long-term storage stability.

Hereinafter, the present invention will be described in detail. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description may be omitted. In addition, terms used herein have the same meaning as commonly understood by experts skilled in the art, unless otherwise defined. In general, the nomenclature used in the present specification and the experimental methods described below are well known and commonly used in the art to which the present invention pertains.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components.

The inventors of the present invention have conducted extensive research in order to solve the problems of the prior art, as a result of: a) polydimethylsiloxane or vinylpolydimethylsiloxane; b) sodium silicate reaction product with chloromethylsilane & isopropyl alcohol; c) titanium(IV)isopropoxide; d) N,N'N"-tributyl-1-methylsilanetriamine; e) hydrotreated heavy naphtha; And f) hydrogen-treated hard naphtha; by uniformly mixing and applying a thin film of a three-dimensional network structure on the surface of the tire bladder, the air between the tire bladder and the semi-finished tire is effectively discharged so that the bladder is semi-finished. It is easy to insert into the tire, effectively prevents adhesion between the inner liner and the bladder of the semi-finished tire, and effectively releases and separates the semi-finished tire from the bladder after molding to maintain the stability of tire quality and high production efficiency. Confirmed.

Tire bladder release coating composition of the present invention

a) polydimethylsiloxane or vinylpolydimethylsiloxane;

b) sodium silicate reaction product with chloromethylsilane & isopropyl alcohol;

c) titanium(IV)isopropoxide;

d) N,N'N"-tributyl-1-methylsilanetriamine;

e) hydrotreated heavy naphtha; And

f) hydrotreated light naphtha;

It characterized in that it comprises a.

Preferably, the tire bladder release coating composition is

a) 10-40 parts by weight of polydimethylsiloxane or vinyl polydimethylsiloxane;

b) 1 to 5 parts by weight of a sodium silicate reaction product with chloromethylsilane & isopropyl alcohol;

c) 1-5 parts by weight of titanium (IV) isopropoxide;

d) 1-5 parts by weight of N,N'N"-tributyl-1-methylsilanetriamine;

e) 10-35 parts by weight of hydrotreated heavy naphtha; And

f) 40-75 parts by weight of hydrotreated light naphtha;

Includes.

If it is within the above range, it can exhibit an excellent release effect even with a small coating amount, and can be used at any time of the year due to low sensitivity to temperature, and it can increase production efficiency due to good drying properties, and is excellent in scratch resistance, At the same time, it has the advantage of excellent long-term storage stability.

The tire bladder release coating composition

a) polydimethylsiloxane or vinylpolydimethylsiloxane; b) sodium silicate reaction product with chloromethylsilane & isopropyl alcohol; c) titanium(IV)isopropoxide; d) N,N'N"-tributyl-1-methylsilanetriamine; e) hydrotreated heavy naphtha; And f) hydrogenated light naphtha; may be prepared by uniformly mixing.

In the tire bladder release coating composition of the present invention, a) polydimethylsiloxane or vinylpolydimethylsiloxane may be used alone or in combination, preferably polydimethylsiloxane having a viscosity of 45,000-55,000 cps. In this case, the scratch resistance is more excellent, and at the same time, it has the advantage of excellent long-term storage stability.

In the tire bladder release coating composition of the present invention, the b) sodium silicate reaction product with chloromethylsilane & isopropyl alcohol acts as a reinforcing agent, and silicon dioxide may be preferably used.

In the tire bladder release coating composition of the present invention, the c) titanium (IV) isopropoxide preferably uses tetra normal-butyl titanate, and the N,N'N"-tributyl-1-methylsilanetriamine Is preferably used aminoethyl aminopropylethoxysilane. In this case, it can exhibit excellent release effect even with a small amount of coating, and it can be used anytime in all four seasons due to its low sensitivity to temperature, and it can increase production efficiency due to its good drying properties, excellent scratch resistance, and at the same time It is possible to provide a tire bladder release coating composition having excellent storage stability.

In the tire bladder release coating composition of the present invention, known products may be used for e) hydrogen-treated heavy naphtha and f) hydrogen-treated hard naphtha.

In the tire bladder release coating composition of the present invention, when the content of a) polydimethylsiloxane or vinylpolydimethylsiloxane is less than 10 parts by weight or more than 40 parts by weight, or d) N,N'N"-tributyl If the content of -1-methylsilanetriamine is less than 1 part by weight, appropriate curing properties cannot be secured, and the e) hydrogen-treated heavy naphtha content is less than 10 parts by weight or more than 35 parts by weight, or f) hydrogen When the content of the treated hard naphtha is less than 40 parts by weight or more than 75 parts by weight, the solubility for the resin is lowered, and there may be a problem in storage stability.

Hereinafter, the present invention will be described in more detail through examples. These examples are for illustrative purposes only, and it will be apparent to those of ordinary skill in the art that the scope of the present invention is not construed as being limited by these examples.

[Example]

Example 1-4

The composition solutions as shown in Table 1 were uniformly mixed at each weight ratio. The polydimethylsiloxane was added with a PDMS-based compound manufactured by Dow Chemical, and the sodium silicate reaction product with chloromethylsilane & isopropyl alcohol was used as a silicon dioxide-based reinforcing material manufactured by Degusa. In Table 1 below, the unit is parts by weight.

ingredient Example 1 Example 2 Example 3 Example 4 Polydimethylsiloxane 15 15 20 20 Sodium Silicate Reaction Product with Chloromethylsilane & Isopropyl Alcohol One 3 2 3 Titanium isopropoxide One 2 One 2 N,N',N"-tributyl-1-methylsilanetriamine 3 3 2 3 Hydrogenated heavy naphtha 20 12 15 12 Hydrogenated hard naphtha 60 65 60 60

[Test Example]

The results of confirming the spray workability, drying time, and scratch resistance of the tire bladder release coating composition prepared in Example 1-4 are shown in Table 2 below.

1. Spray workability

Measuring equipment or measuring method:

1) After measuring the viscosity, Max. Pass if it is in the range of 20 cps

2) Viscometer: Brookfield Analog Rotation Visco Meter LVT

3) Viscosity measurement method: No. 1 Spindle X rpm=60

2. Dryness

The time it takes for the coating layer to dry completely After drying with hot air at 150℃ X 10 minutes in a dry oven, measure the rate of change of mass:

Passed when the solid content is in the range of 16.0±2.0% after measuring the mass change rate

3. Scratch resistance

Test method: It was evaluated by the presence or absence of peeling of the coating film by strongly rubbing it several times with a metal rod.

When the coating film peels off after leaving the coating for 7 days after drying ×

If the coating does not peel off after leaving the coating for 7 days after drying ○

Test Items Other products Example 1 Example 2 Example 3 Example 4 Spray workability 19cps 17cps 17cps 16cps 17cps Dryness 3 hours 2 hours 2 hours 2 hours 2 hours Scratch resistance × ○ ○ ○ ○

As shown in Table 2, the tire bladder release coating composition of the present invention has relatively excellent scratch resistance, drying time, and spray workability when compared to conventional products. Indicated. In addition, it was confirmed that the change over time of the coating film did not occur even after 7 days had elapsed, and by showing good or equivalent physical properties even with a relatively small amount of coating than conventional products, cost reduction and production efficiency (productivity) were reduced. It was confirmed that it can be increased.

As described above, although the embodiments have been described by a limited embodiment, various modifications and variations are possible from the above description to those of ordinary skill in the art. For example, even if the described techniques are performed in a different order from the described method, and/or the described components are combined or combined in a form different from the described method, or are replaced or substituted by other components or equivalents. Appropriate results can be achieved. Therefore, other implementations, other embodiments, and those equivalent to the claims also fall within the scope of the claims to be described later.

Claims (7)

a) 10-40 parts by weight of polydimethylsiloxane having a viscosity of 45,000-55,000 cps;
b) 1 to 5 parts by weight of a sodium silicate reaction product with chloromethylsilane & isopropyl alcohol;
c) 1-5 parts by weight of tetra normal-butyl titanate;
d) 1-5 parts by weight of aminoethyl aminopropylethoxysilane;
e) 10-35 parts by weight of hydrotreated heavy naphtha; And
f) 40-75 parts by weight of hydrotreated light naphtha;
Including,
Tire bladder release coating composition, characterized in that the viscosity of the mixed composition is 16 to 17 cps. delete delete The method of claim 1,
The b) silicate sodium salt reaction product with chloromethylsilane & isopropyl alcohol is a tire bladder release coating composition, characterized in that silicon dioxide. delete a) 10-40 parts by weight of polydimethylsiloxane having a viscosity of 45,000-55,000 cps; b) 1 to 5 parts by weight of a sodium silicate reaction product with chloromethylsilane & isopropyl alcohol; c) 1-5 parts by weight of tetra normal-butyl titanate; d) 1-5 parts by weight of aminoethyl aminopropylethoxysilane; e) 10-35 parts by weight of hydrotreated heavy naphtha; And f) 40-75 parts by weight of hydrotreated light naphtha; and
A method for producing a tire bladder release coating composition, characterized in that the viscosity of the mixed composition is 16 to 17 cps. delete