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A kind of water-based organosilicon grafted (meth)acrylate polymer and its emulsion preparation method

An acrylate and organosilicon technology, applied in the field of polymer materials, can solve the problems of poor placement stability, large hydrolysis group activity, short molecular chain, etc., achieves low requirements for equipment raw materials, realizes industrialized production, and is conducive to industrialized production. Effect

Inactive Publication Date: 2011-12-07
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of silane coupling agent alone has some disadvantages, such as its usually short molecular chain, easy to be covered and embedded by acrylate chain in the reaction, the modification effect of silicone is not obvious; and its hydrolyzed group is more active , easy to react with each other and cross-linked entanglement, poor placement stability

Method used

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  • A kind of water-based organosilicon grafted (meth)acrylate polymer and its emulsion preparation method
  • A kind of water-based organosilicon grafted (meth)acrylate polymer and its emulsion preparation method
  • A kind of water-based organosilicon grafted (meth)acrylate polymer and its emulsion preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Table 1 A kind of emulsion of waterborne silicone grafted (meth)acrylate polymer

[0041] Physical properties and coating properties

[0042]

[0043] Among them, emulsion A 1 The synthesis method is: Methyl methacrylate, methyl acrylate, methacrylic acid, γ-methacryloxypropyl trimethoxysilane (KH-570), butanone according to the ratio of 20:25:4:1: 100 feed, initiated by azobisisobutyronitrile (ATBN), control the temperature at 80 ° C, stir and react under reflux for 4 hours, then cool the solution obtained from the reaction to room temperature, add 50 parts of deionized water under stirring to prepare Emulsion A 1 .

[0044] Emulsion B 1 The synthesis method is as follows: feed octamethylcyclo+tetrasiloxane, dodecylbenzenesulfonic acid and deionized water at a ratio of 19:1:40, control the temperature at 75°C, and stir and react under reflux for 1h to obtain Emulsion B 1 .

[0045] Emulsion C 1 Composition of Emulsion A 1 Same.

[0046] Emulsion C 2 with C ...

Embodiment 2

[0054] The emulsion of another kind of aqueous silicone grafted (meth)acrylate polymer of table 2

[0055] Physical properties and coating properties

[0056]

[0057] Among them, emulsion A 2 The synthesis method is: feed butyl methacrylate, butyl acrylate, γ-methacryloxypropyltrimethoxysilane (KH-570) and absolute ethanol at a ratio of 30:18:2:100, and use Water ethanol is used as a solvent, initiated by azobisisobutyronitrile (AIBN), the temperature is controlled at 75°C, the reaction is stirred under reflux for 5.5h, the solution obtained from the reaction is cooled to room temperature, and 50 parts of deionized water to make emulsion A 2 .

[0058] Emulsion B 2 The synthesis method is as follows: feed octamethylcyclotetrasiloxane, hexadecylbenzenesulfonic acid, and deionized water at a ratio of 9:1:20, control the temperature at 70°C, and stir and react under reflux for 1.5h to obtain Emulsion B 2 .

[0059] Emulsion D 1 Composition of Emulsion A 1 Same.

[0...

Embodiment 3

[0068] Table 3 Emulsion of another aqueous silicone grafted (meth)acrylate polymer

[0069] Physical properties and coating properties.

[0070]

[0071] Among them, emulsion A 3 The synthesis method is: (meth)acrylate monomer, γ-methacryloxypropyltrimethoxysilane (KH-570) and methyl ethyl ketone are fed at a ratio of 48:2:100, and diphenyl peroxide Initiated by acyl (BPO), control the temperature at 80°C, stir the reaction under reflux for 4.5h, cool the solution obtained from the reaction to room temperature, add 50 parts of deionized water under stirring to prepare emulsion A 3 . Among the (meth)acrylate monomers, propyl methacrylate is selected as the hard monomer, and butyl acrylate is the soft monomer, and the two are reacted according to the ratio in the table.

[0072] Emulsion B 3 The synthesis method is as follows: feed octamethylcyclotetrasiloxane, dodecylbenzenesulfonic acid, and deionized water at a ratio of 19:1:40, control the temperature at 70°C, and sti...

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Abstract

The invention discloses an aqueous organosilicon grafted (methyl) acrylic polymer and a preparation method of an emulsion thereof. The method comprises the following steps that 100 weight parts of poly(methyl)acrylate emulsion, 15-50 weight parts of polysiloxane cation emulsion and 0.1-0.5 weight part of catalyst react at 60-90 DEG C for 3-8h; and organic solvents are deprived to obtain the aqueous organosilicon grafted (methyl) acrylic polymer emulsion. The invention employs long-chain alkyl benzene sulfonic acid as a reactive emulsifier, so the emulsion has a good emulsification effect; meanwhile, an emulsion film has no residual emulsifier therein, so the emulsion has a better film performance. The final polymer emulsion has a high organosilicon content; and the grafted siloxane chain is long and is not easily embedded or covered by an acrylate main chain, so as to fully play a modification effect of the organosilicon. The operation method of the invention has low requirements of equipment and raw materials, and is beneficial for the realization of industrialized production.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a water-based organosilicon grafted (meth)acrylate polymer and a method for preparing an emulsion thereof. Background technique [0002] (Meth)acrylate polymers have the characteristics of strong adhesion, good film-forming properties, good oil and weather resistance, and low cost, so they are widely used in the fields of coatings, adhesives, textiles, leather, and papermaking. But at the same time, due to its structural characteristics, especially its linear polymer, there are disadvantages such as poor water resistance, moisture permeability and stain resistance, hot stickiness and cold brittleness. Therefore, it can be modified to improve the performance of the emulsion. [0003] Silicone has excellent high and low temperature resistance, oxidative degradation resistance, weather resistance, hydrophobicity, electrical insulation, impact resistance, wear resistance, and has sof...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C08F220/18C08G77/06
Inventor 刘伟区赵苑
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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