Process for the production of an elastomer agglomerate composition

Patent metadata

Field	Value
Publication number	US-11090837-B2
Application number	US-201716466507-A
Country	US
Kind code	B2
Filing date	Dec 6, 2017
Priority date	Dec 9, 2016
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

A process for the production of an elastomer agglomerate composition wherein the process comprises the steps in this order: (a) providing a slurry comprising elastomeric particles having an average particle size of ≤150 nm in water; and (b) forcing the slurry from (a) through an aperture at a flow velocity of at least 500 m/s. The elastomer agglomerate compositions produced via such process demonstrate a particularly desirable high average particle size.

First claim

The invention claimed is:

1. A process for the production of an elastomer agglomerate composition wherein the process comprises the steps in this order:
(a) providing a slurry comprising elastomeric particles having an average particle size of ≤150 nm in water; and
(b) forcing the slurry from (a) through an aperture at a flow velocity of at least 500 m/s.

2. The process according to claim 1 , wherein the material flow through the aperture is confined by a flat first surface and a flat second surface together forming a channel.

3. The process according to claim 1 , wherein the slurry is introduced at a pressure of ≥40 and ≤60 MPa.

4. The process according to claim 1 , wherein the slurry comprises ≥20.0 wt % of elastomeric particles with regard to the total weight of the slurry.

5. The process according to claim 1 , wherein the elastomeric particles are selected from polybutadiene particles, poly(styrene-butadiene) particles, poly(acrylonitrile butadiene) particles or polybutylacrylate particles.

6. The process according to claim 1 , wherein the process is performed using a valve assembly comprising the aperture, the valve assembly further comprising a seat, a flow channel through which the slurry flows at a certain pressure towards the aperture, and a valve subjected to a pressure in the direction opposite the flow direction of the slurry, wherein the seat comprises a central opening forming the flow channel, and wherein the valve pressure and the pressure of the slurry are arranged such that the slurry is forced through the aperture at a flow velocity of at least 500 m/s.

7. The process according to claim 6 , wherein the seat is a circular seat comprising a circular opening.

8. The process according to claim 1 , wherein the slurry is forced through the aperture at a flow velocity of at least 700 m/s and at most 1000 m/s.

9. The process according to claim 1 , wherein the elastomeric particles account for at least 98.0 wt % of the total weight of solid ingredients in the slurry.

10. An elastomer agglomerate composition produced according to the process of claim 1 , wherein the elastomer agglomerate composition comprises less than 0.02 wt %, with regard to the total weight of the elastomer agglomerates in the elastomer composition, of agglomerates having a particle size of >3000 nm; and less than 30 wt % of elastomer agglomerates having a particle size of <200 nm, with regard to the total weight of the elastomer agglomerates.

11. The elastomer agglomerate composition according to claim 10 , wherein the elastomer agglomerate composition comprises less than 25 wt % of elastomer agglomerates having a particle size of <200 nm, with regard to the total weight of the elastomer agglomerates.

12. The elastomer agglomerate composition according to claim 10 , wherein the elastomer agglomerate composition comprises ≥60 wt % with regard to the total weight of the elastomer agglomerates, of agglomerates having a particle size of >200 nm and ≤1000 nm.

13. The elastomer agglomerate composition according to claim 10 , wherein the elastomer agglomerate composition comprises ≤10.0 wt % of elastomer agglomerates having a particle size of >1000 nm, with regard to the total weight of the elastomer agglomerates.

14. The elastomer agglomerate composition according to claim 10 , wherein the elastomer agglomerate composition comprises ≤1.0 wt % of elastomer agglomerates having a particle size of >1500 nm, with regard to the total weight of the elastomer agglomerates.

15. Acrylonitrile-butadiene-styrene copolymer produced using the elastomer agglomerate composition according to claim 10 .

16. The process according to claim 1 ,
wherein the material flow through the aperture is confined by a flat first surface and a flat second surface together forming a channel;
wherein the slurry is introduced at a pressure of ≥40 and ≤60 MPa;
wherein the slurry comprises ≥20.0 wt % of elastomeric particles with regard to the total weight of the slurry; and
wherein the elastomeric particles are selected from polybutadiene particles, poly(styrene-butadiene) particles, poly(acrylonitrile butadiene) particles or polybutylacrylate particles.

17. The process according to claim 16 , wherein the process is performed using a valve assembly comprising the aperture, the valve assembly further comprising a seat, a flow channel through which the slurry flows at a certain pressure towards the aperture, and a valve subjected to a pressure in the direction opposite the flow direction of the slurry, wherein the seat comprises a central opening forming the flow channel, and wherein the valve pressure and the pressure of the slurry are arranged such that the slurry is forced through the aperture at a flow velocity of at least 700 m/s and at most 1000 m/s.

18. The process according to claim 16 , wherein the elastomeric particles account for at least 98.0 wt % of the total weight of solid ingredients in the slurry.

Assignees

• Sabic Global Technologies Bv

Inventors

• Youssef Ahmed Abouelfetouh
• Lowry Vern
• Ferraris Dane
• Xu Jianhua

Classifications

• B29B7/94

  Liquid charges · CPC title

• B29B7/726

  Measuring properties of mixture, e.g. temperature or density (B29B7/724 takes precedence) · CPC title

• B29B7/32

  with non-movable mixing or kneading devices · CPC title

• C08J3/12

  Powdering or granulating · CPC title

• C08L33/06

  of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical · CPC title