Elastomeric silicone emulsion for coating applications

A technology of elastomers and coatings, applied in polyether coatings, coatings, etc., can solve the problems of poor anti-graffiti materials and expensive

Active Publication Date: 2017-09-26
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This anti-graffiti material is not effective and / or expensive

Method used

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  • Elastomeric silicone emulsion for coating applications
  • Elastomeric silicone emulsion for coating applications
  • Elastomeric silicone emulsion for coating applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Embodiment 1: the preparation of the polyether emulsion of dimethoxy (methyl) silyl methyl carbamate termination

[0110] Emulsions were prepared according to the following method using the following compositions and weight percentages.

[0111]

[0112] The emulsion in Example 1 was prepared by the following steps:

[0113] Emulsifier ethoxylated isotridecyl alcohol and premixed water in Mix on mixer until foamy egg icing forms. The dimethoxymethylsilylmethylcarbamate terminated polyether was added to the egg icing and mixed for 4 minutes at 10000 rpm. Add deionized water and stir for 1 min at 5000 rpm. Additional deionized water was added and stirred at 5000 rpm for 1 minute, followed by additional deionized water at 5000 rpm for 1 minute.

[0114] The tensile strength and elongation of the emulsion of Example 1 were measured according to the ASTM D 2370 standard reference method using a 75mm x 13mm specimen shape; the crosshead spacing was set at 2.54cm (1.0 ...

Embodiment 2

[0115] Example 2: Preparation of an emulsion from a mixture of a dimethoxymethylsilylmethylcarbamate terminated polyether and a methoxyfunctional methylphenylpolysiloxane

[0116] Emulsions were prepared according to the method described in Example 1 using the combinations and weight percentages in the table below. Preparation of pre-blend polymers of dimethoxymethylsilylmethylcarbamate-terminated polyether and methoxy-functional methylphenylpolysiloxane in place of dimethoxymethylsilyl alone Methyl carbamate terminated polyether.

[0117]

[0118] The tensile strength and elongation of the emulsion of Example 2 are measured with a 75mm x 13mm sample shape according to the method referenced in the ASTM D 2370 standard; the chuck spacing is set to 2.54cm (1.0inch), and the crosshead speed is set to 0.042 cm / s (1 inch / min). The tensile strength of the emulsion of Example 2 is 186.158kPa (27psi), and the elongation is 172%.

[0119] Using another emulsifier such as ethoxyla...

Embodiment 3-7

[0150] Examples 3-7: Preparation of Other Useful Exemplary Emulsions

[0151] Other useful exemplary emulsions of Examples 3-7 were prepared according to the method described above, using the following components and weight percentages:

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Abstract

Emulsions of silicone terminated polyethers are used to modify paints and coatings over masonry, plaster, cellulous, and EIFS substrates to increase flexibility, water repellency, and elastomeric properties of the paints and coatings to protect the paint and coating substrates from cracking due to moisture penetration. The modified paints and coatings are also used as anti-graffiti paint.

Description

technical field [0001] This invention relates to paints and coatings modified with elastomeric silicone emulsions. Background technique [0002] Most building materials are porous, which makes them easily wetted from the outside, eg by rain. If the pores of a building material are filled with water, the thermal insulation properties of the material are adversely affected. Prolonged wetting also leads to moisture damage. A variety of coatings have been developed for use in masonry, plaster, cellulose and Exterior Insulation Finishing Systems (EIFS), but most have a tendency to become brittle. Embrittlement can lead to cracking of the paint, leaving a large number of cracks in the film, which loses its function and is not aesthetically pleasing. Cracking can also occur if water enters the coating or substrate during freeze-thaw cycles. [0003] Graffiti on buildings and structures has also become a significant issue. Various anti-graffiti materials have been developed to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D171/02C08G65/336
CPCC08G65/336C09D171/02C08L83/06C09D201/10C09D183/06C09D183/04C08L83/04C08L71/02C09D5/022
Inventor A·安德鲁斯
Owner WACKER CHEM GMBH
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