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Device and method for preparing a liquid polymer misture

A technology of liquid polymers and blends, applied in applications, household appliances, household components, etc., can solve the problems of changing the appearance of the final product, insufficient homogenization of polyol compounds, product rejection, etc.

Active Publication Date: 2018-07-17
WEBASTO AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This in turn causes the polyol compound to be only insufficiently homogenized and the end product, i.e. the polyurethane system material in the fully hardened state, to contain gas inclusions due to insufficient gas charge dispersion, which can Significantly alter the appearance of the final product and result in reprocessing or product rejection

Method used

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  • Device and method for preparing a liquid polymer misture

Examples

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Embodiment Construction

[0018] In the drawing, a plant 10 is shown for the preparation of polyol compounds representing reactive polymers for polyurethane system materials for the production of roof openings for motor vehicles The plastic foam edge of the sliding roof cover of the system.

[0019] The device 10 comprises a storage container 12 in which the polyol compound can be stored and which is provided with an agitator 14 in order to eliminate any stratification of the polyol compound caused by storage. The storage container 12 is connected to a degassing device 20 formed by a vacuum fan via a duct 16 in which a supply pump 18 is arranged. An outlet duct 22 is connected to a vacuum fan, in which outlet duct 22 a further supply pump 24 and a mass flow meter 26 are arranged, and which leads to a homogenization unit 28 formed by a toothed colloid mill. A dosing valve 52 is arranged at the line 16 upstream of the homogenization unit 28, via which dosing valve 52 additive gas can be added to the pol...

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Abstract

The invention relates to a device for preparing a liquid polymer mixture, comprising a storage container (12) for the liquid polymer mixture; a degassing device (20) for the liquid polymer mixture, which is arranged downstream of the storage container (12); a gasification device for applying an additive gas to the liquid polymer mixture, which is arranged downstream of the degassing device; a homogenization device (28) for the polymer mixture to which additive gas has been added, which is arranged downstream of the gasification device; and a discharge line (30) for the homogenized polymer mixture, which is connected to the homogenization device (28).

Description

technical field [0001] The present invention relates to a device and a method for preparing liquid polymer blends, in particular for immediate use in polyurethane system materials. Background technique [0002] It is known from practice to nucleate liquid polymer blends, eg polyol compounds for polyurethane system materials, ie to inflate them with gas, prior to further processing. As a result, the bulk density is reduced so that polyurethane system materials can be realized in their fully cured and hardened state as foams, in particular rigid or soft foams. Gas charging or rather nucleation has hitherto been carried out in process vessels, into which the corresponding gas is injected and in which the polyol compound is homogenized by means of a stirrer. Here, the gas charge added to the polyol compound by stirring and conveying is not taken into account, so that the polyol compound contains an indeterminate amount of gas. This in turn causes the polyol compound to be only...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B7/74B29B7/84B29B7/88B29C67/24
CPCB29B7/7414B29B7/7433B29B7/847B29B7/88B29C67/246B29L2031/3002B29B7/72B29B7/86B29C44/1271C08J9/122C08J2203/06C08J2375/04C08G18/40B01D19/0036B29K2075/00C08G2110/0008C08G2110/0025C08G18/3203
Inventor M·扎赫尔M·劳赫J·沃考克A·伊斯巴赫K-H·巴特尔M·泽巴斯
Owner WEBASTO AG
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