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Organosilicon coating levelling agent

A technology of silicone coating and leveling agent, which is applied in the direction of coating, etc., can solve the problems of uncommon use, no gloss enhancement, and slip enhancement effect, so as to improve gloss, smoothness and scratch resistance, and improve leveling Effect

Active Publication Date: 2011-05-04
JIAXING UNITED CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it can only provide limited effects on coatings, that is, it has obvious leveling effect, no gloss enhancement and slip enhancement effect, and it is not commonly used in coating formulations.

Method used

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  • Organosilicon coating levelling agent
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  • Organosilicon coating levelling agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Synthesis of Silicone Oil Containing Hydrogen in Part of Methyl

[0041] In a 1000ml four-necked glass reaction flask equipped with an electric stirrer, a loop condenser and a thermometer, add 431.4g D4 (octamethylcyclomethicone), 56.8g D4 H (1,3,5,7-Tetrahydrotetramethylcyclotetrasiloxane), 11.8gMM and 25g acid clay, heat up to 50-75°C, and react at this temperature for 8h, then cool down to 29SiNMR analysis, its structural formula is

[0042]

Embodiment 2

[0044] Synthesis of Silicone Oil Containing Hydrogen in Part of Methyl

[0045] Replace the acid clay with sulfuric acid, and the reaction device, reactant, charging amount and operation method are the same as in Example 1. Also after reacting at 50-75°C for 8 hours, control the temperature of the reactant at 60°C, and slowly add 30g Na 2 CO 3 , to PH=7, filtered to remove white solid Na 2 SO 4 , also changed to a distillation device, and distilled off low boilers at 100°C and 1.3 MPa to obtain a colorless transparent methyl part hydrogen-containing silicone oil with the same structure as formula (II).

Embodiment 3

[0047] Synthesis of organomodified silicone oil

[0048] Equipped with electric stirrer, reflux condenser, thermometer, drip balance tube, guide N 2 In the 1000mL four-necked glass reaction flask with the trachea and the electric heating mantle, add 300g of methyl part hydrogen-containing silicone oil of formula (II), 173g of polyglycol allyl methyl ether, CH 3 COOK15g (1% mass fraction of isopropanol solution), toluene 200g, pass through dry N 2 Gas, start the electric stirrer, and heat, when the temperature reaches 65 ℃, add the toluene solution 1g of platinum-divinyltetramethyldisiloxane chelate (platinum addition is 15 * 10 of the total mass of reactant -6 ), when the system temperature reaches 90°C, the heating is suspended, and the reactant changes from cloudy to transparent. At this time, 79.2 g of 1-dodecene and 6 g of allyl glycidyl ether were added dropwise from the drop material balance tube, and the system changed from slightly turbid to transparent again. The d...

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PUM

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Abstract

The invention discloses an organosilicon paint leveling agent with a general formula of a structure as shown in a formula (I) and a preparation method thereof. The method adopts two steps for reaction: (1) preparing a methyl part containing hydrogenous silicone oil by a mixed siloxane balancing method; and (2) preparing organic group modified polymethyl silica to obtain the organosilicon paint leveling agent. The organosilicon paint leveling agent has the performances of controlling surface flowing, improving leveling, increasing the lustrousness of a coating film, enhancing smoothness and resisting scratch.

Description

technical field [0001] The invention relates to a paint leveling agent, more specifically to polyether, alkane-modified polysiloxane and its use as a leveling agent in paint. Background technique [0002] In order to overcome the disadvantages of poor leveling of the coating during the coating construction process, and to obtain a smooth coating film after the coating flows and dries into a film, it is necessary to control the coating film surface. [0003] In order to improve the leveling property of the coating, it can be used to reduce the surface tension between the coating and the substrate, so that the coating and the substrate have good wettability; adjust the evaporation rate of the solvent; reduce the viscosity; improve the fluidity of the coating; prolong the leveling Time; an extremely thin monomolecular layer is formed on the surface of the coating film to provide uniform surface tension. With the addition of anti-cratering and leveling agents, all or part of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/06C09D183/04C08G77/50C09D7/47
Inventor 李炜程旭阳鄢清佳
Owner JIAXING UNITED CHEM
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