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Elastomeric compositions comprising hydrocarbon polymer additives

A technology of hydrocarbon polymers and compositions, applied in the field of hydrocarbon polymer additives in the field of cured elastomer compositions, can solve the problems of reducing tire wet traction performance, reducing tear strength, reducing dynamic performance, etc.

Active Publication Date: 2010-12-08
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Current industrial PAH oil alternatives such as Treated Distillate Aromatic Extract ("TDAE") and Mild Extract Solvate ("MES") are limited in supply and exhibit drawbacks such as reduced dynamic properties, reduced Poor tire wet traction, reduced tear strength, and reduced tire durability (eg, tire component-to-component adhesion may be lower with TDAE and MES than with conventional aromatic oils)

Method used

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  • Elastomeric compositions comprising hydrocarbon polymer additives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0123] The elastomer composition comprising at least one elastomer and a hydrocarbon polymer additive will now be further described with reference to the following non-limiting examples.

[0124] The curing performance was measured using MDR 2000 from Alpha Technologies, Inc. according to ASTM D-2084 at the indicated temperature and 0.5 degree arc. The sample is cured at the indicated temperature (usually 150°C-160°C), and the time (minutes) corresponds to t90 + appropriate mold hysteresis. When possible, standard ASTM tests are used to determine the physical properties of the cured compound. Use Instron 4202 or Instron series IX automatic material testing system 6.03.08 to measure stress / strain performance (tensile strength, elongation at break, modulus value, energy at break) at room temperature. Tensile strength measurement is performed at ambient temperature; the sample (dog-bone shape) has a width of 0.25 inches (0.62 cm) and a length of 1.0 inches (2.5 cm) (between two tab...

Embodiment 1

[0146] In Example 1, a model silica tread compound was prepared. The compound was prepared using a Krupp 1.0 liter capacity laboratory mixer with intermeshing rotors. The non-productive mixing cycle is as follows: 1) Set the mixer rotor speed at 80 RPM with a punch (ram) pressure of 60 psi; 2) Add elastomer, all silica, silane coupling agents, oil or hydrocarbon polymer additives , And free powder, lower the punch; 3) Mix to a temperature of 160°C or 5 minutes maximum and then discharge the batch from the mixer. The productivity or the second stage and the vulcanization system components are added to the mixer. The compound was mixed in a mixer to 100°C-105°C or 90 seconds, discharged, and then tableted on a 2-roll mill.

[0147] The formulation of the model silica tread compound of Example 1 is listed in Table 5, with all amounts listed in phr. In Compounds 2 and 3, hydrocarbon polymer additives (HPA A and HPA B) were used instead of aromatic oil. Hydrocarbon polymer additiv...

Embodiment 2

[0156] In Example 2, a model carbon black loaded tread compound was prepared. Two hydrocarbon polymer additives, HPA A and HPA B, were added to replace the naphthenic oil or aromatic oil in Compounds 3 and 4. The formulation of the model carbon black loaded tread compound is listed in Table 7; all amounts listed are in phr.

[0157] Table 7-Tread compound loaded with model carbon black

[0158] Compound

1

2

3

4

Natural rubber (SMR

20)

30.00

30.00

30.00

30.00

SSBR 20%

B.S.

70.00

70.00

70.00

70.00

N234

75.00

75.00

75.00

75.00

wax

1.50

1.50

1.50

1.50

TMQ

1.00

1.00

1.00

1.00

6PPD

3.00

3.00

3.00

3.00

Stearic acid

2.00

2.00

2.00

2.00

ZnO

3.00

3.00

3.00

3.00

Aromatic oil

40.00

Naphthenic oil

40.00

HPA A

45.00

HPA B

45.00

CBS

1.75

1.75

1.75

1.75

DPG

0.40

0.40

0.40

0.40

sulfur

1.50

1.50

1.50

1.50

PVI

0.10

0.10

0.10

0.10

[0159] The compound was mixed using a Farrel BR size laboratory intern...

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Abstract

Provided are elastomeric compositions comprising at least one elastomer and a hydrocarbon polymer additive. Preferably the hydrocarbon polymer additive comprises from 60 to 90% piperylene, from 5 to 15% cyclic components, from 5 to 20% styrenic components, up to 5% isoprene, up to 5% indenic components, and up to 10% amylene. Also provided are elastomeric compositions comprising at least one elastomer and a hydrocarbon polymer additive, wherein the hydrocarbon polymer additive has a molecular weight of from 520 to 650 g / mole and a glass transition temperature (Tg) of from 48 to 53 0C. The elastomeric compositions are particularly useful in making tires and other cured rubber articles.

Description

[0001] Priority statement [0002] This application claims the priority and rights of USSN 61 / 022,122 filed on January 18, 2008. Technical field [0003] The present invention relates to hydrocarbon polymer additives and their use in elastomer compositions. More specifically, the invention relates to the use of hydrocarbon polymer additives in cured elastomer compositions. Background technique [0004] Elastomer compositions are used in a variety of applications, including tire components such as treads and sidewalls, hoses, belts, footwear components, and vibration isolation devices. The choice of ingredients for commercial formulations of elastomeric compositions depends on the balance of desired properties, applications, and end-use applications. [0005] For example, in the tire industry, the balance between the processability of the unvulcanized (uncured) composition in the tire factory and the serviceability of the cured rubber tire composite is particularly important. The ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/00C08L21/00
CPCC08L7/00C08L21/00C08K5/01C08L23/283C08L23/22C08L9/00B60C1/0016C08K3/0033C08L9/06C08K3/013C08L2666/06C08L2666/02
Inventor M·B·罗德格尔斯A·J·迪亚斯R·D·戴维斯T·R·巴比S·W·莫瑞
Owner EXXONMOBIL CHEM PAT INC
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