# US 2018/0021982 A1 · Method and apparatus arrangement for mixing silicone composition

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- Number: US 2018/0021982 A1
- Document ID: US20180021982A1
- Status: Published application
- Kind: A1
- Application number: 15/542,776
- Filed: 2016-01-07
- Published: 2018-01-25
- Earliest claimed: 2015-01-13
- Assignees: Oy Pro-Hydro Ab
- Applicants: Oy Pro-Hydro Ab
- Inventors: Esa Kuismanen
- Web page: https://patentgrep.com/patent/US20180021982A1

## CPC

- B29B 7/82: Heating or cooling
- B29B 7/005: {for mixing in batches}
- B29B 7/007: {for continuous mixing}
- B29B 7/244: {of several materials}
- B29B 7/286: {measuring properties of the mixture, e.g. temperature, density (B29B7/283 takes precedence)}
- B29B 7/603: {in measured doses, e.g. proportioning of several materials}
- B29B 7/728: {Measuring data of the driving system, e.g. torque, speed, power, vibration (B29B7/724 takes precedence)}
- B29B 7/805: {Cleaning of the mixing conduit, module or chamber part}
- C08J 3/005: {Processes for mixing polymers}
- C08J 3/24: Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K)
- B29K 2083/00: Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
- C08J 2383/04: Polysiloxanes
- B29B: PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS

## Abstract

In the manufacturing method and manufacturing arrangement according to the invention for a silicone composition the mixer mixing the different subcomponents of the silicone composition are removed for the duration of downtime and cooled to a temperature, in which the chemical reaction between the different subcomponents of the silicone composition stops. In the manufacturing method of the invention the mixer is reconnected to the manufacturing apparatus arrangement after downtime without cleaning it from the silicone composition subcomponents remaining in the mixer.

## Claims

### Claim 1

A method for manufacturing a silicone composition, in which method
a pumping of different silicone composition subcomponents is started;
the silicone composition subcomponents are pumped with component-specific pumps to a mixer of silicone composition subcomponents;
a silicone composition is mixed from the subcomponents with the mixer;
the process for manufacturing silicone composition is stopped due to downtime;
wherein
the silicone composition mixer is cooled to a temperature, in which a chemical reaction between the different subcomponents of the silicone composition stops;
the silicone composition mixer is kept at the cooling temperature for a duration of the downtime; and that
the manufacture of the silicone composition is continued after the downtime without cleaning the mixer.

### Claim 2 (depends on 1)

The method for manufacturing a silicone composition according to claim 1, wherein
the silicone composition mixer is removed from the manufacturing apparatus arrangement for a silicone composition for the duration of the downtime; and
the silicone composition mixer is reconnected to the manufacturing apparatus arrangement for a silicone composition after the end of the downtime.

### Claim 3 (depends on 2)

The method for manufacturing a silicone composition according to claim 2, wherein the silicone composition mixer is cooled in a separate cooling element.

### Claim 4 (depends on 2)

The method for manufacturing a silicone composition according to claim 2, wherein the silicone composition mixer is cooled in a freezer.

### Claim 5 (depends on 4)

The method for manufacturing a silicone composition according to claim 4, wherein the silicone composition mixer is cooled at least to a temperature of −10° C.

### Claim 6 (depends on 2)

The method for manufacturing a silicone composition according to claim 2, wherein the silicone composition mixer is cooled in a refrigerator.

### Claim 7 (depends on 6)

The method for manufacturing a silicone composition according to claim 6, wherein the silicone composition mixer is cooled to a temperature of +3° C.

### Claim 8

A manufacturing arrangement for a silicone composition, which comprises:
material containers for silicone composition subcomponents;
a separate pump for each silicone composition subcomponent, the pumps being configured to pump the subcomponents of the silicone composition to be manufactured to a mixer through output pipes, wherein the manufacturing arrangement for the silicone composition further comprises a cooling element configured to be closed around the mixer and an output pipe during a production break, the cooling element being configured to:
cool the mixer for a duration of a downtime to a temperature at least below +3° C., in which temperature a chemical reaction between different subcomponents of the silicone composition in the mixer stops; and
keep the mixer filled with the subcomponents at the cooling temperature for duration of the downtime; and
heat the mixer after the downtime to a temperature of the manufacture of the silicone composition without cleaning the mixer,
and wherein the manufacturing arrangement is configured to start pumping of subcomponents of the silicone composition to the mixer when the manufacturing temperature of the silicone composition has been reached for transferring heated silicone composition from the uncleaned mixer to an application.

### Claim 9 (depends on 8)

The manufacturing arrangement for a silicone composition according to claim 8, wherein
connections of the mixer both to output pipes of the pumps and an output pipe of the mixer are quick fasteners;
the mixer is configured to be removed from the said quick fasteners for the duration of the downtime; and that wherein
the mixer removed from the manufacturing arrangement for a silicone composition is configured to be connected to the manufacturing arrangement after the downtime.

### Claim 10

(canceled)

### Claim 11 (depends on 8)

The manufacturing arrangement for a silicone composition according to claim 8, wherein the cooling element is a freezer.

### Claim 12 (depends on 11)

The manufacturing arrangement for a silicone composition according to claim 11, wherein the silicone composition mixer is configured to be cooled at least to a temperature of −10° C.

### Claim 13 (depends on 8)

The manufacturing arrangement for a silicone composition according to claim 8, wherein the cooling element is a refrigerator.

### Claim 14

(canceled)