Terminal modified organic silicone coating flatting agent and preparation method thereof

A technology of silicone coating and leveling agent, applied in the direction of coating, etc., can solve the problems of limited slip and scratch resistance, and achieve the effects of excellent smoothness, reduced surface tension and good compatibility

Active Publication Date: 2012-08-22
RUNHE ORGANICSILICONE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Terminal modified organic silicone coating flatting agent and preparation method thereof
  • Terminal modified organic silicone coating flatting agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Preparation of terminal H-containing silicone oil

[0032] In a 2000ml three-necked flask equipped with an electric stirrer and a thermometer, add 1148 grams of DMC (dimethylcyclosiloxane mixed ring), 52 grams H MM H (Tetramethylhydrogendisiloxane), 40 grams of concentrated sulfuric acid, heated to 50°C, kept the temperature for 10 hours, then added 60 grams of sodium bicarbonate to neutralize, filtered to remove salt, and finally distilled at 120°C and 1.3KPa , to remove low boilers, to obtain a colorless and transparent dimethyl silicone oil containing H at the end, the viscosity measured by a capillary viscometer is 50cs (25°C), and the H content is 0.06%.

Embodiment 2

[0034] Synthesis of H-terminal silicone oil

[0035]Using macroporous cationic resin instead of concentrated sulfuric acid as catalyst, the reaction device, reactant, charging amount and operation method are the same as in Example 1. Heat up to 50°C, keep it warm for 10 hours, remove the catalyst by filtration, distill at 120°C and 1.3KPa to remove low boilers, and obtain a colorless and transparent dimethyl silicone oil containing H at the end, and measure its viscosity with a capillary viscometer It is 50cs (25°C), and the H content is 0.06%.

Embodiment 3

[0037] In a 2000ml four-necked glass reaction flask equipped with an electric stirrer, a thermometer, a reflux condenser, and a nitrogen gas guide tube, add 420 grams of the end-containing H silicone oil prepared in Example 1, and the structural formula is CH 2 =CHCH 2 -O-(C 2 h 4 o) 14 (C 3 h 6 O) 10 -COCH 3 390 grams of allyl alcohol polyether, 400 grams of toluene, pass through dry nitrogen, start the electric stirrer, and heat, when the temperature reaches 60 ° C, add platinum-divinyltetramethyldisiloxane chelate 0.5 g (the amount of platinum added is 10×10 of the total mass of reactants -6 ), when the system temperature reaches 80°C, suspend heating, and the reactant turns from turbid to transparent, and keep warm at 80-110°C for 6 hours. The completion of the Si-H reaction was detected with potassium hydroxide alcohol solution, and the solvent was removed by vacuuming to obtain terminal polyether-modified polydimethylsiloxane, whose viscosity was measured by a ro...

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Abstract

The invention relates to a coating flatting agent, in particular to a preparation of polyether terminal modified polydimethylsiloxane and an application of the polyether terminal modified polydimethylsiloxane serving as the flatting agent in coatings. The structural formula of a terminal modified organic silicone coating flatting agent is shown as follows, wherein m is equal to 0-100; and R is equal to - (CH2) 3-O-(C2H4O) x (C3H6O) y-R', wherein the x is equal to 0-100, the y is equal to 0-100, and R' is hydrogen (H) or alkyl, acetoxy group and epoxy group with one to ten carbon atoms. The flatting agent has the advantages that the surface tension of the coatings is reduced, the wettability of substrates is improved, the flowing and flatting of the coatings are increased, the surface defects are eliminated, the smoothness is improved, the surface friction coefficient of the coatings is lowered, and the scrath resistance and anti-blocking are improved.

Description

technical field [0001] The invention relates to a paint leveling agent, in particular to the preparation of polyether terminal modified polydimethylsiloxane and its use as a leveling agent in paint. Background technique [0002] Leveling agent is a commonly used coating additive, which can promote the formation of a flat, smooth and uniform coating film during the drying and film forming process of the coating. After the coating is applied, there is a process of flowing and drying to form a film, and then gradually form a flat, smooth and uniform coating film. Whether the coating film can achieve smooth and smooth characteristics is called leveling. Shrinkage cavity is one of the characteristic defects of coatings in the process of leveling and film formation. In the actual construction process, due to poor leveling, there will be brush marks when brushing, roll marks when rolling, orange peel when spraying, shrinkage cavities, pinholes, and sags during the drying process....

Claims

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Application Information

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IPC IPC(8): C09D7/06C08G81/00C08G77/12C09D7/47
Inventor 廖乐新
Owner RUNHE ORGANICSILICONE NEW MATERIAL
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