# US 10,308,551 B2 · Rubber composite and process for obtaining same

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- Number: US 10,308,551 B2
- Document ID: US10308551B2
- Status: Granted
- Kind: B2
- Application number: 15/489,893
- Filed: 2017-04-18
- Published: 2018-10-18
- Granted: 2019-06-04
- Earliest claimed: 2017-04-18
- Applicants: Jorge B. Sousa
- Inventors: Jorge B. Sousa
- Web page: https://patentgrep.com/patent/US10308551B2

## CPC

- C08L 95/00: Compositions of bituminous materials, e.g. asphalt, tar, pitch
- C04B 2/02: Lime {(obtaining Ca(OH)2 otherwise than by simple slaking of quick lime C01F11/02)}
- C04B 26/003: {Oil-based binders, e.g. containing linseed oil}
- C04B 26/04: obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B 26/26: Bituminous materials, e.g. tar, pitch {(C08L95/00 takes precedence)}
- C08L 7/00: Compositions of natural rubber
- C04B 2111/0075: {for road construction}
- C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
- C08L 2205/22: Mixtures comprising a continuous polymer matrix in which are dispersed crosslinked particles of another polymer
- C08L 2207/24: recycling of old tyres and caoutchouc and addition of caoutchouc particles
- C08L 2555/60: Organic non-macromolecular ingredients, e.g. oil, fat, wax or natural dye
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE

## Abstract

This disclosure provides a rubber composite for use in a variety of applications, and methods for its preparation.

## Claims

### Claim 1

A process for obtaining a rubber composite in particulate form, the process comprising the steps of:
(a) mixing heavy-fraction oil distillate with particulate rubber at a first elevated temperature under conditions of high sheer rate to obtain oil-swollen rubber particles;
(b) adding at least one first powdered additive to the oil-swollen rubber particles to obtain a mixture;
(c) reducing the temperature of the first mixture by at least 20° C.;
(d) heating the first mixture to a second elevated temperature under conditions of high sheer rate;
(e) reducing the temperature of the mixture to about 20° C. at a cooling rate of at least 2° C./min; and
(f) adding at least one second powdered additive to said mixture under conditions of high sheer rate to said rubber composite,
such that the rubber composite comprises between about 10 and about 20% wt of said heavy-fraction oil distillate, the heavy-fraction oil distillate and said at least one first additive being substantially contained within an internal structure of the rubber, and the rubber's external surface being substantially oil-dry and said at least one second additive is present at the external surface of the rubber composite.

### Claim 2 (depends on 1)

The process of claim 1, wherein the at least one first additive is present in the rubber composite at a content of between about 10 and about 30 wt %.

### Claim 3 (depends on 1)

The process of claim 1, wherein the at least one second additive is present in the rubber composite at a content of between about 5 and about 10 wt %.

### Claim 4 (depends on 1)

The process of claim 1, wherein said first elevated temperature is between about 100 and 170° C.

### Claim 5 (depends on 1)

The process of claim 1, wherein said second elevated temperature is between about 130 and 180° C.

### Claim 6 (depends on 1)

The process of claim 1, wherein the mixture is maintained at said second elevated temperature of a period of time of between about 1 and 60 minutes.

### Claim 7 (depends on 1)

The process of claim 1, wherein said high sheer rate is obtained by mixing at at least 1200 rpm.

### Claim 8 (depends on 1)

The process of claim 1, wherein said first and second additives are mineral-based powders, each being independently selected from the group consisting of limestone, hydrated lime, cement, silica, and mica.