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Polysilsesquioxane-polyacrylate-nano SiO2 composite emulsion and preparation method and application thereof

A technology of polysilsesquioxane and polyacrylate, which is applied in the direction of grafted polymer adhesives, adhesive types, adhesive additives, etc., can solve the problems of low content, cumbersome modification process, etc., and achieve improved Silicon content, effect of increasing hardness

Active Publication Date: 2014-03-12
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of nano-SiO 2 The content is low in the acrylate polymer emulsion system and the need for SiO 2 Surface modification process is cumbersome and other problems, the invention provides a high silicon content polysilsesquioxane-polyacrylate-nano-SiO 2 The preparation method of composite emulsion, the emulsion has good appearance and storage stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Preparation of polysilsesquioxane emulsion: in parts by mass, 0.3 part of octylphenol polyoxyethylene ether OP-10, 0.2 part of disodium dodecyl diphenyl ether sulfonate (DSB), Add 1 part of ammonia water with a mass concentration of 28% and 100 parts of water into the reaction kettle, raise the temperature to 40 ° C and stir for 15 minutes, add 10 parts of γ-methacryloxypropyl trimethoxysilane slowly within 0.5 hours , kept stirring for 12 hours to obtain a polysilsesquioxane emulsion;

[0049] (2) High silicon content polysilsesquioxane-polyacrylate-nano-SiO 2 Preparation of complex emulsion:

[0050] a. Mix 15 parts of methyl methacrylate and 15 parts of butyl acrylate to make monomer I, take 10% of mixed monomer I and 1 part of 2-hydroxyethyl acrylate to make monomer II;

[0051] b. Add 20 parts of polysilsesquioxane emulsion prepared in step (1), 70% of 40 parts of water, and 60% of 0.1 part of initiator potassium persulfate into the reactor, stir for 10 minut...

Embodiment 2

[0056] (1) Preparation of polysilsesquioxane emulsion: in parts by mass, 0.5 parts of octylphenol polyoxyethylene ether OP-15, 0.5 parts of sodium dodecylbenzenesulfonate (LAS), 1.5 parts of hydrogen Add sodium oxide and 120 parts of water into the reaction kettle, raise the temperature to 45°C and stir for 20 minutes, add 15 parts of vinyltriethoxysilane slowly within 1 hour, keep stirring for 16 hours to obtain polysilsesquioxane Lotion;

[0057] (2) High silicon content polysilsesquioxane-polyacrylate-nano-SiO 2 Preparation of complex emulsion:

[0058] a. Mix 15 parts of ethyl methacrylate, 10 parts of propyl methacrylate and 20 parts of methyl acrylate to make monomer I, take 15% of mixed monomer I and mix with 2 parts of 3-hydroxypropyl acrylate Made into monomer II;

[0059] b. Add 30 parts of polysilsesquioxane emulsion prepared in step (1), 75% of 50 parts of water, and 65% of 0.3 part of initiator sodium persulfate into the reaction kettle, stir for 15 minutes and...

Embodiment 3

[0064] (1) Preparation of polysilsesquioxane emulsion: in parts by mass, 1 part of octylphenol polyoxyethylene ether OP-30, 0.5 part of sodium dodecyl sulfate (SDS), 2 parts of potassium hydroxide Add 140 parts of water into the reaction kettle, raise the temperature to 50°C and stir for 25 minutes, add 20 parts of γ-methacryloxypropyltriethoxysilane slowly within 1.5 hours, keep stirring for 18 hours to obtain Polysilsesquioxane emulsion;

[0065] (2) High silicon content polysilsesquioxane-polyacrylate-nano-SiO 2 Preparation of complex emulsion:

[0066] a. Mix 10 parts of methyl methacrylate, 15 parts of butyl methacrylate, 15 parts of ethyl acrylate and 10 parts of propyl acrylate to make monomer I, take 20% of mixed monomer I and 3 parts of acrylic acid- 4-Hydroxybutyl ester is mixed to make monomer II;

[0067] b. Add 35 parts of polysilsesquioxane emulsion prepared in step (1), 80% of 60 parts of water, and 70% of 0.5 part of initiator ammonium persulfate into the re...

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Abstract

The invention relates to the field of high molecule synthesis. In order to solve the problems that the content of nano SiO2 in an acrylate polymer emulsion system is lower and the modifying process on the surface of SiO2 is tedious and the like, the invention provides a polysilsesquioxane-polyacrylate-nano SiO2 composite emulsion which consists of 20-60 parts of a polysilsesquioxane emulsion, 15-35 parts of alkyl methacrylate, 15-35 parts of alkyl acrylate, 1-5 parts of hydroxyl alkyl acrylate, 0.1-1 part of an initiator, 40-80 parts of water, 30-60 parts of a silica sol and 5-15 parts of a cosolvent. The emulsion has good appearance and storage stability. The film is high in transparency, the hardness reaches 6H, the adhesive force is level 1, and the content of silicon based on SiO2 reaches over 25%. The high silicon content polysilsesquioxane-polyacrylate-nano SiO2 composite emulsion integrates advantages of organic and inorganic materials, and the film has excellent performances such as ageing resistance, heat resistance, scratch resistance, wear resistance and high hardness. The emulsion has a wide application prospect in the fields of coatings and adhesives.

Description

technical field [0001] The invention relates to the field of polymer synthesis, in particular to a high silicon content polysilsesquioxane-polyacrylate-nanometer SiO 2 Composite emulsion and its preparation method and application. technical background [0002] Water-based coatings use water instead of organic solvents. They are safe and non-toxic during production and use, and can meet the needs of energy conservation, emission reduction, recycling and sustainable development. The development of high-performance water-based coatings has become a priority for the development of the coatings industry. Converting solvent-based coatings into water-based coatings to ensure high film hardness and excellent scratch resistance after film formation is a difficult problem that must be overcome in the process of water-based coatings. As an environment-friendly product, water-based acrylate emulsion has the characteristics of good gloss retention, excellent film-forming property, envir...

Claims

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Application Information

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IPC IPC(8): C08F283/12C08F220/14C08F220/18C08F220/28C08F230/08C08G77/20C09D151/08C09D7/12C09J151/08C09J11/04
Inventor 裴勇兵吴连斌赵丽汤龙程陈遒蒋剑雄来国桥
Owner HANGZHOU NORMAL UNIVERSITY
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