The filled polymer composition

 

(57) Abstract:

The invention relates to the rubber industry. The filled polymer composition comprises a linear copolymer of butadiene with styrene content of the bound styrene 292 wt.% when a block or statistical distribution of parts of butadiene and styrene in a macromolecule 100 wt.h., the filler is carbon black with a specific geometric surface 15-100 m2/g 2,0-60,0 wt.h., modifier - hexahydrophthalic acid of 0.2 to 3.0 wt.h., and in the case of statistical copolymer composition further comprises vulcanizing a group of 9.0 wt.h. The compositions have high strength and hardness and are characterized by low hysteresis. 2 C. p. F.-ly, 4 PL.

The invention relates to the rubber industry, namely, creating high-strength, highly rigid compositions with low hysteresis losses on the basis of copolymers of butadiene with styrene content of the bound styrene 292 wt.% and the filler is carbon black with a specific geometric surface 15-100 m2/,

Known composition on the basis of a statistical copolymer of butadiene with styrene content associated stickers, target additives and modifier gain - N,N-dinitroso-N-methylaniline. The composition has a sufficiently high tensile strength, low hysteresis, high values of hardness and modulus. However, the reduction in hysteresis loss is small. So, the addition of the promoter in the amount of 0.33 wt.h. on 100 wt.h. copolymer causes a decrease of the torsional hysteresis (logarithmic decrement) 0,222 to 0.18. However, the tensile strength and elongation decrease with the introduction of the promoter compared with the control mixture containing no promoter (strength reduced from 26 to 23 MPa, and elongation from 520 to 400%.) [J. Harris, R. White. Promoters gain elastomer filler /Reinforcement of elastomers. - M.: Chemistry, 1968, S. 211-231].

Closest to the proposed technical solution in essence and achieve positive is filled polymer composition on the basis of the linear block copolymer of butadiene with styrene content of the bound styrene 292 wt. % including the filler is carbon black with a specific geometric surface 75 - 100 m2/g in the amount of 2-60 wt.h. and modifier - 2,5-biphenyldicarboxylic acid (BFFC) in an amount of 0.2-1.5 m is ice characterized by high strength (22-28 MPa) and high hardness (up 67-90% Shor). However, it has a fairly high hysteresis. The composition of the same composition, but on the basis of a statistical copolymer, also characterized by high strength, but by reducing the speed of vulcanization has lower values of modules and the increased hysteresis in comparison with the control sample containing no modifier.

The task, which is aimed by the invention is the creation of a filled polymer compositions based on linear copolymer of butadiene with styrene content of the bound styrene 292 wt.% when a block or statistical arrangement of parts and the filler is carbon black having a high strength, high hardness (modulus) and low hysteresis.

To achieve the technical solutions used filled polymer composition based on linear blockcopolymer of butadiene with styrene content of the bound styrene 292 wt.%, includes filler is carbon black and the modifier, and the modifier it contains hexahydrophthalic acid, and the filler is carbon black with a specific geometric surface 15-100 m2/g sleduwego styrene 292 wt.% - 100,0

This technical carbon - 2,0-60,0

Hexahydrophthalic acid - 0,2 - 3,0

or filled polymer composition on the basis of a linear copolymer of butadiene with styrene content of the bound styrene 292 wt.%, includes filler is carbon black and the modifier, and it contains as a linear copolymer is a linear copolymer of butadiene with styrene content of the bound styrene 292 wt.% when the statistical distribution of parts of butadiene and styrene in a macromolecule, as the filler is carbon black with a specific geometric surface 15-100 m2/g, and as a modifier - hexahydrophthalic acid and further comprises curing the group in the following ratio, wt.h.:

The specified line is a copolymer of butadiene with styrene content of the bound styrene 292 wt.% - 100,0

This technical carbon - 2,0 - 60,0

Hexahydrophthalic acid - 0,2 - 3,0

Curing group - 9,0

The proposed solution is illustrated by the following examples.

Example 1.

We offer the filled polymer composition comprises a linear block copolymer with a content of bound styrene carbon black with a specific geometric surface 15 m2/g brand P-803 and modifier - hexahydrophthalic acid. Formulations of compositions according to the invention, the prototype and the control are shown in table 1.

The composition is prepared on a laboratory roll mill Lb 320 160/160 with an adjustable gap between the rollers and Freccia 1:1,269 at a temperature of 305oWith the next mode.

According to the invention and prototype

1. Landing DST-30 on roll at 0 minute.

2. The introduction of a carbon black and a modifier for 2 minutes.

3. Remove from the rolls in the form of a sheet for 10 minutes.

Control

1. Landing of a block copolymer on a roll at 0 minute.

2. The introduction of carbon black for 2 minutes.

3. Remove from the rolls in the form of a sheet for 10 minutes.

The sheets molded in a press at a temperature of plates 143oWith plates and washers for 30 minutes in the forms of locks, then overload the press with the temperature of the plates 20oFrom where was incubated for one hour and removed from the form.

The molded plates and spacers define the properties by the relevant state Standards.

Properties of the filled polymer compositions are shown in table 2.

Example 2.

Offer of the filled polymer is of the ARC, carbon black with a specific geometric surface 15 m2/g brand P-803 or carbon black with a specific geometric surface 100 m2/g type K-354 or carbon black with a specific geometric surface 100 m2/g brand U-234, modifier - hexahydrophthalic acid and curing the group consisting of sulfur, accelerator, zinc white and stearin. Formulations of compositions according to the invention, the prototype and the control are shown in table 3.

The composition is prepared on a laboratory roll mill Lb 320 160/160 with an adjustable gap between the rollers and Freccia 1:1,269 at a temperature of 305oWith the next mode

According to the invention and prototype

1. Landing SKMS-30 ARC on roll at 0 minute.

2. The introduction of a carbon black and a modifier for 2 minutes.

3. Introduction accelerator, zinc white, stearin at 15 minutes.

4. The introduction of sulfur in the 17th minute.

5. Remove from the rolls in the form of a sheet for 25 minutes.

Control

1. Landing SKMS-30 ARC on roll at 0 minute.

2. The introduction of carbon black for 2 minutes.

3. Introduction accelerator, zinc white, stearin at 15 minutes.

4.The introduction of sulfur in the 17th minute.

The molded plates and spacers define the properties by the relevant state Standards.

Properties of the filled polymer compositions are shown in table 4.

1. The filled polymer composition on the basis of the linear block copolymer of butadiene with styrene content of the bound styrene 292 wt. % including the filler is carbon black and the modifier, characterized in that as a modifier it contains hexahydrophthalic acid, and the filler is carbon black with a specific geometric surface 15-100 m2/g in the following ratio, wt. including :

The linear block copolymer of butadiene with styrene content of the bound styrene 292 wt. % - 100,0

This technical carbon - 2,0-60,0

Hexahydrophthalic acid - 0,2-3,0

2. The filled polymer composition on the basis of a linear copolymer of butadiene with styrene content of the bound styrene 292 wt. % including the filler is carbon black and the modifier, characterized in that it contains in the quality of the statistical distribution of parts of butadiene and styrene in the macromolecule, as the filler is carbon black with a specific geometric surface 15-100 m2/g, and as a modifier - hexahydrophthalic acid and further comprises curing the group in the following ratio, wt. including :

The specified line is a copolymer of butadiene with styrene content of the bound styrene 292 wt. % - 100,0

This technical carbon - 2,0-60,0

Hexahydrophthalic acid - 0,2-3,0

Curing group - 9,0

 

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