Nano-grade aqueous narrow molecular weight distribution acrylic acid copolyester and preparation method thereof

A narrow molecular weight distribution, acrylic copolyester technology, applied in the chemical industry, can solve the problems of VOC hazards, environmental governance difficulties, etc., and achieve the effects of strong waterproof ability, good waterproof performance, and excellent environmental protection effects.

Active Publication Date: 2018-09-21
SHANGHAI XIANKE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, a large number of VOC hazards are caused, which brings difficulties to environmental governance.

Method used

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  • Nano-grade aqueous narrow molecular weight distribution acrylic acid copolyester and preparation method thereof
  • Nano-grade aqueous narrow molecular weight distribution acrylic acid copolyester and preparation method thereof
  • Nano-grade aqueous narrow molecular weight distribution acrylic acid copolyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1, the preparation of nanoscale water-based narrow molecular weight distribution acrylic copolyester C30

[0058] The preparation method of nanoscale water-based narrow molecular weight distribution acrylic acid copolyester of the present invention is as follows:

[0059] A) Dissolve the emulsifier sodium lauryl sulfate of formula quantity 50% quality in the ultrapure water of formula quantity 90% quality in reactor, stir until sodium lauryl sulfate dissolves completely, form emulsifier aqueous solution, then heat to 80°C and maintain a constant temperature.

[0060] B) add the water of remaining formula quantity in the container, then add the initiator ammonium persulfate of formula quantity, stir until ammonium persulfate dissolves completely, obtain initiator aqueous solution.

[0061] C) Add the basic monomer methyl methacrylate, methacrylic acid and butyl acrylate of the recipe amount into the container respectively, stir evenly, remove the polymeriza...

Embodiment 2

[0064] Embodiment 2, preparation of nanoscale water-based narrow molecular weight distribution acrylic copolyester C30

[0065] A) in the reactor, dissolve the emulsifier sodium octadecyl sulfate of formula amount 45% quality with the ultrapure water of formula amount 80% quality, stir until sodium octadecyl sulfate dissolves completely, form emulsifier aqueous solution, then heat to 70°C and maintain a constant temperature.

[0066] B) add the water of remaining formula quantity in the container, then add the initiator potassium persulfate of formula quantity, stir until potassium persulfate dissolves completely, obtain initiator aqueous solution;

[0067] C) Add the basic monomer methyl methacrylate, methacrylic acid and butyl acrylate of the recipe amount into the container respectively, stir evenly, remove the polymerization inhibitor, and add the emulsifier of the remaining recipe amount of 55% by mass, and stir slowly Until the emulsifier and basic monomer are complet...

Embodiment 3

[0069] Embodiment 3, preparation of nanoscale water-based narrow molecular weight distribution acrylic copolyester C30

[0070] A) Dissolve emulsifier NP-10 with a formula quantity of 55% mass in ultrapure water with a formula quantity of 70% mass in the reactor, stir until the NP-10 is completely dissolved to form an aqueous emulsifier solution, then heat to 85°C and keep constant temperature.

[0071] B) add the water of remaining formula quantity in the container, then add the initiator ammonium persulfate of formula quantity, stir until ammonium persulfate dissolves completely, obtain initiator aqueous solution;

[0072] C) Add the basic monomers methyl methacrylate, methacrylic acid and butyl acrylate of the recipe amount into the container respectively, stir evenly, remove the polymerization inhibitor, and add the emulsifier of the remaining recipe amount of 45% by mass, and stir slowly Until the emulsifier and basic monomer are completely dissolved to obtain a mixed ...

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Abstract

The invention discloses nano-grade aqueous narrow molecular weight distribution acrylic acid copolyester which comprises a basic monomer comprising methyl methacrylate, methacrylic acid and butyl acrylate, wherein the basic monomer is polymerized into the nano-grade aqueous narrow molecular weight distribution acrylic acid copolyester under the action of an emulsifier and an initiator in a pure water system; the D50 particle size of the nano-grade aqueous narrow molecular weight distribution acrylic acid copolyester is 40-65nm; the multi-dispersion index PDI (Mw/Mn) of the copolyester is lessthan 1.05. The invention further provides a preparation method of the acrylic acid copolyester. The nano-grade aqueous narrow molecular weight distribution acrylic acid copolyester disclosed by the invention is prepared from water as a dispersion medium merely, is directly polymerized in the pure water system, exists stably, has a nano-grade narrow bandwidth distribution characteristic, has the characteristics of low viscosity and high solid contents, in addition is free of water absorption or after-tack and is good in waterproof property. Functionalized modification can be also achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a nanoscale water-based narrow molecular weight distribution acrylic acid copolyester and a preparation method thereof. Background technique [0002] In order to reduce the use of VOC substances, the current international and domestic resin-related industries mainly use water-based resins such as polyurethane, epoxy resin, and water-soluble acrylic acid as raw materials, and use resin modification or salt formation, fine particle size emulsification and other preparation processes. However, the polymerization method of water-based resins such as polyurethane and epoxy resin is doomed to be water-based modification. And in the modified preparation process of water-based resin, although can reduce the use of VOC material, reduce the use of toxic and harmful substances, still can't accomplish thoroughly to get rid of volatile organic compound. Therefore, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/06C09D11/107
CPCC09D11/107C08F220/14C08F220/18C08F220/1804C08F220/06C08F230/02C08F220/1811C09D11/023C08F2/30
Inventor 张元张毅君
Owner SHANGHAI XIANKE CHEM CO LTD
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