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Improved paint formulations comprising cellulose ether/network building polymer fluid gel thickeners

一种纤维素醚、网状结构的技术，应用在触变涂料、涂层、乳胶漆等方向，能够解决损失其它特性、增加成本、脱水收缩和悬浮性不好等问题，达到改善雾化性能的效果

Inactive Publication Date: 2010-03-24
CP KELCO U S INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of these thickeners contribute to a variety of in-use properties including roll spatter resistance and flow and leveling, but none of these polymers described provide good in-package storage stability for the paint. sex or sag control
Other polymers offer these benefits, but often at the expense of other properties
For example, xanthan gum can provide very good suspension in the package and control sag, but it will affect the flow and homogenization of the coating, and it will increase the cost, so it is mainly limited to structural coatings
Various combinations of cellulose ethers and hydrophobically modified auxiliary thickeners have been used, but they all have disadvantages, namely, syneresis and poor suspension, especially at elevated temperatures

Method used

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  • Improved paint formulations comprising cellulose ether/network building polymer fluid gel thickeners
  • Improved paint formulations comprising cellulose ether/network building polymer fluid gel thickeners
  • Improved paint formulations comprising cellulose ether/network building polymer fluid gel thickeners

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] Preparation of Viscous Fluid Gels

[0056] Thickening system fluid gels are prepared according to three different methods, as follows:

[0057] Method A, hot mix (with low acyl gellan gum or high acyl gellan gum)

[0058] Finnfix 2000: KELCOGEL CG-LA or FINNFIX 2000: KELCOGELLT 100 - HA powder was dried at room temperature (-25°C) with mixing - stirring and adding to deionize the water. With mixing, the contents were heated to 90°C for 5 minutes. For mixtures, without mixing, add 5 mM Ca++ (e.g., CaCl2) or 1% NaCl, then cool to ~25°C, at which point, resume moderate mixing to form a weak gel, biocide Adding and fluid gels are placed in containers to be added to the paint at any point in the manufacturing process (for example, following pigment dispersion or after latex binder addition).

[0059] Method B, cold mix (in situ) at the beginning of grinding the pigment (using low acyl gellan gum):

[0060] For the standard paint treatment, the container was filled wi...

example 1

[0066] Paints were prepared according to Preparation B to estimate the suspension of pigment in acrylic semi-gloss latex paint (25% PVC) at a pH of about 8.3. A comparison was made between a single gum CMC containing system and a system stabilized with a mixture of cellulose gum and LA-gellan gum. The paint was mixed with the appropriate amount of thickener to achieve a Stormer tack of 77+ / - 1KU of the paint.

[0067] water

[0068] About the dispersion of high-speed disperser

example 2

[0070] Paints were prepared according to Preparation B to estimate a suspension of pigment in a matte latex paint (63% PVC) at about 8.5 pH. A comparison was made between a single gum CMC containing system and a system stabilized with a mixture of cellulose gum and LA-gellan gum. Additionally, comparisons have been made to references that also included associative thickeners. For systems including gellan gum, salt was added as a gelling agent, and the time of addition was varied for comparison. Paints were prepared with 0.5% by weight thickener.

[0071] components

[0072] Ethylene Propylene Glossy Emulsion

[0073] components

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Abstract

Paint formulations that exhibit improved performance characteristics due to the presence of a combination of a cellulose ether (carboxymethyicellulose and / or hydroxy ethylcellulose) and a network building polymer (gellan gum, carrageenan, etc.. as examples) as a thickening system therein are provided. Such a combination permits long-term shelf stability of the paint formulation while simultaneously according effective Row. leveling, and other important properties to the final paint formulation. The combination of the cellulose ether and a network building pol\ mer allows for a lower viscositycellulosic compound fo impart the desired.theological behavior therein while also permitting the other desirable characteristics noted above. Such paint compositions also exhibit improved atomizatiopfor spray applications with such a thickening system.

Description

technical field [0001] The present invention relates to coating formulations which have improved coating formulations due to the combination of cellulose ethers (e.g., hydroxymethylcellulose and / or hydroxyethylcellulose) and networked polymers as a thickening system. performance characteristics. This combination of cellulose ether and network polymer allows low viscosity cellulosic compounds to have the desired rheological characteristics while having the other desirable characteristics described above. The coating composition also exhibits improved atomization properties when applied by spray with such a thickening system. Background technique [0002] Thickeners are widely used for rheology control purposes, especially for increasing viscosity and imparting thixotropic properties to products. Especially in latex coatings, the thickener used for water-dispersed components requires compatibility and stability. Coatings are coatings that are applied to the surface of a sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/02
CPCC09D5/04C09D5/024C09D101/26C08L1/26C08L1/284C08L5/00C09D7/004C09D105/00C09D7/44C08L2666/26
Inventor 马丁·范德·威廉菲尔·温斯顿约翰·史威斯罗斯·克拉克马瑞特·拉蒂宁
Owner CP KELCO U S INC
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