Unlock instant, AI-driven research and patent intelligence for your innovation.

Process for the preparation of masterbatches of diene elastomers and silica

A technology of silica and elastomer latex, applied in transportation and packaging, special tires, tire parts, etc., can solve problems such as poor dispersion of fillers, difficulty in processing, and increased interaction

Active Publication Date: 2016-01-20
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
View PDF34 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because a high specific surface area means increased interaction between filler particles and thus poor dispersion of the filler in the elastomer matrix and is difficult to process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for the preparation of masterbatches of diene elastomers and silica
  • Process for the preparation of masterbatches of diene elastomers and silica
  • Process for the preparation of masterbatches of diene elastomers and silica

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0323] The purpose of this example is to demonstrate the proper operation of the method according to the invention, in particular with respect to the measured formulation pH.

[0324] Tests E1, E2 and E3 were carried out according to the method detailed in the paragraph above, using:

[0325] - Concentrated latex of high ammonia natural rubber from supplier Beetex with a measured solids content of 61.68%, said concentrated latex being diluted twice;

[0326] - aluminum-doped silica at a doping level of 2.5% by weight; and

[0327] - The amount of silicon dioxide is 50 phr (when bringing the two dispersions into contact).

[0328] The only difference between these three experiments was that, in the procedure detailed above, the pH of the aqueous dispersion of doped silica was varied to vary the formulation pH.

[0329] Thus, tests E1, E2 and E3 differ from each other in that, when the dispersions (aqueous dispersion of silica and elastomer latex) are brought into contact, the...

Embodiment 2

[0339] The purpose of this example is to demonstrate the proper operation of the method according to the invention, especially with regard to the level of silicon dioxide doping.

[0340] E'1, E'2 and E'3 were prepared according to the method detailed in the previous paragraph using:

[0341] - concentrated natural rubber latex identical to that of Example 1;

[0342] - The pH of the formulation is 8;

[0343] - The amount of silicon dioxide is 50 phr (when bringing the two dispersions into contact).

[0344] The only difference between the three experiments was the level of silica doping. Therefore, experiments E'1, E'2 and E'3 are distinguished as follows:

[0345] - in the case of E'1, the silicon dioxide doping level is 1% by weight;

[0346] - in the case of E'2, a silicon dioxide doping level of 3.5% by weight;

[0347] - In the case of E'3, the silicon dioxide doping level is 5% by weight.

[0348] The results obtained for these three tests are given in Table 3 be...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
diameteraaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a method for preparing a masterbatch of diene elastomer and silica, said method comprising the following consecutive steps: doping silica with at least divalent metal elements; preparing doped silica at least one dispersion of silicon in water; contacting and mixing a diene elastomer latex with said aqueous dispersion of doped silica to obtain a coagulated latex; recovering said coagulated latex; and converting the recovered coagulated latex The latex is dried to obtain a masterbatch.

Description

technical field [0001] The present invention relates to the preparation of a silica / diene elastomer masterbatch comprising at least modified silica and a diene elastomer latex, in particular natural rubber latex. The term "masterbatch" denotes an elastomer-based composition into which fillers and possibly other additives have been incorporated. [0002] The invention relates in particular to the use of this masterbatch for the preparation of diene rubber compositions reinforced with inorganic fillers intended for the production of tires or for semi-finished products for tyres, in particular for the treads of these tyres. Background technique [0003] In order to obtain the optimum reinforcing properties imparted by the filler in tire treads, and to obtain high wear resistance, it is known that this filler is generally suitable to be present in the elastomeric matrix in a final form which is as finely ground as possible and as possible Evenly distributed as possible. Howev...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/08C08K3/22C08K3/36C08J3/22
CPCB60C1/0016C08J3/215C08J2309/08C08J2321/02C08K3/08C08K3/22C08K3/36
Inventor J·贝里奥B·德戈德马里斯G·拉法格
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN