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A polyurea product as thixotropic rheology modifying agent

一种触变剂、聚脲的技术，应用在触变涂料、油墨、涂层等方向，能够解决结晶结构不能发挥流变作用、增强光学效应等问题

Active Publication Date: 2008-07-02
ONYX NETHERLANDS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Equally disadvantageous is that the coarser crystalline structure is not rheologically effective under the temperature and shear regimes of coating application
This is usually compensated by using increased amounts of said polyurea compounds in the sag control agent, but this may further enhance the negative optical effects

Method used

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  • A polyurea product as thixotropic rheology modifying agent
  • A polyurea product as thixotropic rheology modifying agent
  • A polyurea product as thixotropic rheology modifying agent

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] The preparation of each of the first and second polyurea compounds can also optionally be carried out in the presence of a binder, and it is of course preferred that the first polyurea compound is prepared as a colloid in the environment of a host resin. This can be done by mixing a mixture of the binder and isocyanate with the amine component or by mixing the isocyanate with a mixture of the binder and amine component, or by mixing the binder separately with the amine This is done by mixing the two mixtures of components and NCO-components. Obviously, if the base material is highly reactive with the amines or isocyanates, the base material and the particularly sensitive compound cannot be premixed. The term "highly reactive" herein means that more than 30% of the sensitive amine or isocyanate reacts with the base material before mixing the amino acid derivative and isocyanate to prepare the rheology modifier. The mixing operation may be carried out in any convenient m...

Embodiment 1

[0101] (90 / 10)S / R-AMBA+HDI / BA+HDI (1:1) in Setal 166 SS-80

[0102] 100.0 g Setal 166 SS-80 was added to the reactor, and it was mixed with 0.06 g (0.5 mmol) R-(+)-α-methylbenzylamine and 0.58 g (4.8 mmol) S- (-)-α-Methylbenzylamine was mixed for 2 minutes. The stirring speed was increased to 4000 rpm, and 0.46 g (2.7 mmol) of 1,6-hexamethylene diisocyanate was added using a syringe. The mixture was stirred for a further 30 seconds at 4000 rpm. The stirring speed was reduced to 1000 rpm and after 2 minutes 0.60 g (5.6 mmol) benzylamine was added. A mixture of 0.49 g (2.91 mmol) of 1,6-hexamethylene diisocyanate and 0.49 g of butyl acetate was added to the reactor within 15 minutes using a pump. The mixture was stirred for an additional 30 seconds at 1000 rpm.

Embodiment 1A

[0104] (90 / 10) S / R-AMBA+HDI / BA+HDI (1:1) in Setal 166 SS-80 100.0 g of Setal 166 SS-80 was added to the reactor and the This was mixed with 0.06 g (0.50 mmol) of R-(+)-α-methylbenzylamine and 0.58 g (4.8 mmol) of S-(-)-α-methylbenzylamine for 2 minutes. The stirring speed was increased to 4000 rpm, and 0.46 g (2.7 mmol) of 1,6-hexamethylene diisocyanate was added using a syringe. The mixture was stirred for a further 30 seconds at 4000 rpm. The stirring speed was reduced to 1000 rpm and after 5 minutes 0.60 g (5.6 mmol) benzylamine was added. The mixture was stirred for a further 2 minutes at 1000 rpm. The stirring speed was increased to 1500 rpm, and 0.50 g (2.97 mmol) of 1,6-hexamethylene diisocyanate was added using a syringe. The mixture was stirred for an additional 30 seconds at 1000 rpm.

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Abstract

A thixotropic agent comprising a first polyurea reaction product of a first polyisocyanate with a first amine and a second polyurea reaction product of a second polyisocyanate with a second amine different from the first polyurea reaction product precipitated in the presence of the colloidal particles of the first reaction product.

Description

field of invention [0001] The present invention relates to thixotropic agents comprising polyurea compounds and to the use of said thixotropic agents as rheology modifiers, in particular as sag control agents in coating compositions. The present invention further relates to sag control agent compositions, coating compositions and paints comprising said polyurea compound as sag control agent. Background of the invention [0002] The use of polymeric coatings to protect surfaces and enhance the aesthetic and functional properties of materials is well known. These polymeric coatings are typically applied to surfaces as liquid systems using techniques such as rolling, brushing, spraying, pouring, pneumatic or electrostatic spraying. [0003] The rheological properties of the liquid coating system at the time of application are generally chosen such that the coating can be applied without problems by the chosen method, flows evenly on the substrate to be applied, so that the Su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C08G18/28C09D5/04
CPCC09D7/004C08G18/2865C08G18/3228C08L75/02C09D11/03C09D7/44C08G18/28C08G18/18C09D5/04
Inventor R·H·G·布林克许斯
Owner ONYX NETHERLANDS LTD
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