Organic-Inorganic Composite for Rubber Reinforcement, Method for Preparing the Same, and Rubber Composition for Tires Comprising the Same

• US 20200131341A1
• Filed: 01/05/2018
• Published: 04/30/2020
• Est. Priority Date: 03/27/2017
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Kim, Woo Seok, Jun, Shin Hee, Lee, Ha Na, Choi, Kwon Il, Oh, Myounghwan
• Granted Patent: US 11,059,956 B2
• Time in Patent Office: Days
• CPC Class Codes: B60C 1/00 Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• CPC Class Codes: C01P 2002/88 by thermal analysis data, e.g. TGA, DTA, DSC
• CPC Class Codes: C01P 2004/64 Nanometer sized, i.e. from 1-100 nanometer
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C08K 2201/005 Additives being defined by their particle size in general
• CPC Class Codes: C08K 2201/006 Additives being defined by their surface area
• CPC Class Codes: C08K 2201/011 Nanostructured additives
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C08K 9/06 with silicon-containing compounds
• CPC Class Codes: C08L 21/00 Compositions of unspecified rubbers
• CPC Class Codes: C08L 9/06 Copolymers with styrene
• CPC Class Codes: C09C 1/405 containing combined silica, e.g. mica

Abstract

The present disclosure relates to an organic-inorganic composite for rubber reinforcement, a method for preparing the same, and a rubber composition for tires including the same. The organic-inorganic composite for rubber reinforcement according to the present disclosure exhibits excellent dispersibility in the rubber composition and reinforcing effect, and thus can be suitably used for eco-friendly tires requiring high efficiency and high fuel efficiency characteristics.

Claims

1. An organic-inorganic composite for rubber reinforcement, comprising:

amorphous aluminosilicate particles having a composition of the following Chemical Formula 1, and

a silane-based coupling agent bonded to at least a part of a surface of aluminosilicate particles,

wherein the organic-inorganic composite satisfies the following Equation 1;

M_x/n[(AlO₂)_x,(SiO₂)_y].m(H₂O) 

 

[Chemical Formula 1]

wherein, in Chemical Formula 1,

M is an element selected from the group consisting of Li, Na, K, Rb, Cs, Be, and Fr, or an ion thereof;

x>

0, y>

0, n>

0, and m≥

0;

1.0≤

y/x≤

10.0; and

0.01≤

x/n≤

1.2,

Da≥

3.0 

 

[Equation 1]

wherein, in Equation 1,

Da is an area under a derivative thermogravimetric curve over a temperature range of 300°

C. to 500°

C., wherein the derivative thermogravimetric curve is in units weight reduction percent of the organic-inorganic composite relative to temperature (%/°

C.), and

wherein the derivative thermogravimetric curve is obtained from thermogravimetric analysis (TGA) of the organic-inorganic composite, wherein, in TGA, weight of the organic-inorganic composite is measured as a function of temperature over a temperature ranging from 30°

C. to 500°

C.

2. The organic-inorganic composite for rubber reinforcement of claim 1,

wherein the amorphous aluminosilicate particles have an average particle diameter of 10 to 100 nm, a Brunauer-Emmett-Teller surface area (S_BET) of 80 to 250 m²/g, and an external specific surface area (S_EXT) of 60 to 200 m²/g according to an analysis of nitrogen adsorption/desorption.

3. The organic-inorganic composite for rubber reinforcement of claim 1,

wherein the silane-based coupling agent is at least one compound selected from the group consisting of bis(3-triethoxysilylpropyl) tetrasulfide, bis(2-triethoxysilylethyl) tetrasulfide, bis(4-triethoxysilylbutyl) tetrasulfide, bis(3-trimethoxysilylpropyl) tetrasulfide, bis(2-trimethoxysilylethyl) tetrasulfide, bis(4-trimethoxysilylbutyl) tetrasulfide, bis(3-triethoxysilylpropyl) trisulfide, bis(2-triethoxysilylethyl) trisulfide, bis(4-triethoxysilylbutyl) trisulfide, bis(3-trimethoxysilylpropyl) trisulfide, bis(2-trimethoxysilylethyl) trisulfide, bis(4-trimethoxysilylbutyl) trisulfide, bis(3-triethoxysilylpropyl) disulfide, bis(2-triethoxysilylethyl) disulfide, bis(4-triethoxysilylbutyl) disulfide, bis(3-trimethoxysilylpropyl) disulfide, bis(2-trimethoxysilylethyl) disulfide, bis(4-trimethoxysilylbutyl) disulfide, 3-trimethoxysilylpropyl-N,N-dimethylthiocarbamoyltetrasulfide, 3-triethoxysilylpropyl-N,N-dimethylthiocarbamoyltetrasulfide, 2-triethoxysilylethyl-N,N-dimethylthiocarbamoyltetrasulfide, 2-trimethoxysilylethyl-N,N-dimethylthiocarbamoyltetrasulfide, 3-trimethoxysilylpropylbenzothiazolyltetrasulfide, 3-triethoxysilylpropyl benzothiazole tetrasulfide, 3-trimethoxysilylpropyl methacrylate monosulfide, and 3-trimethoxysilylpropyl methacrylate monosulfide.

4. A method for preparing the organic-inorganic composite for rubber reinforcement of claim 1, comprising:

mixing and heating amorphous aluminosilicate particles and an organic solvent to a temperature ranging from 130 to 150°

C. to prepare a heated mixture, wherein the amorphous aluminosilcate particles have a composition represented by Chemical Formula 1;

adding a silane-based coupling agent to the heated mixture and stirring for 10 to 60 minutes to form an organic-inorganic composite having the silane-based coupling agent bound to at least a part of a surface of the amorphous aluminosilicate particles; and

washing and drying the organic-inorganic composite,

wherein the organic solvent having a boiling point of 150°

C. or higher and not reactive with the amorphous aluminosilcate particles and the silane-based coupling agent,

M_x/n[(AlO₂)_x,(SiO₂)_y].m(H₂O) 

 

[Chemical Formula 1]

wherein, in Chemical Formula 1,

M is an element selected from the group consisting of Li, Na, K, Rb, Cs, Be, and Fr, or an ion thereof;

x>

0, y>

0, n>

0, and m≥

0;

1.0≤

y/x≤

10.0; and

0.01≤

x/n≤

1.2.

5. The method for preparing the organic-inorganic composite for rubber reinforcement of claim 4,

wherein a weight ratio of the amorphous aluminosilicate particles and the silane-based coupling agent ranges from 1:

0.01 to 1;

0.5.

6. The method for preparing the organic-inorganic composite for rubber reinforcement of claim 4,

wherein the organic solvent is at least one compound selected from the group consisting of mesitylene, indane, tetralin, limonene, decane, undecane, and dodecane.

7. A rubber composition for tires, comprising:

the organic-inorganic composite for rubber reinforcement of claim 1; and

at least one diene elastomer.

8. The rubber composition for tires of claim 7,

wherein the diene elastomer is at least one compound selected from the group consisting of a natural rubber, polybutadiene, polyisoprene, a butadiene/styrene copolymer, a butadiene/isoprene copolymer, a butadiene/acrylonitrile copolymer, an isoprene/styrene copolymer, and a butadiene/styrene/isoprene copolymer.