A kind of polymer emulsion and preparation method thereof

A technology of polymer emulsion and emulsion, applied in coating and other directions, can solve the problems of complicated operation process, and achieve the effect of simple process, easy synthesis and short reaction time.

Active Publication Date: 2016-07-27
GUANGZHOU DUBAGN MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the polymerization method it adopts is a two-step method, and the operation process is relatively complicated.

Method used

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  • A kind of polymer emulsion and preparation method thereof
  • A kind of polymer emulsion and preparation method thereof
  • A kind of polymer emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Preparation of structured amphiphilic block copolymers by RAFT polymerization

[0039] The monomer composition is acrylic acid and isobornyl acrylate, the RAFT reagent composition is 2-{[(dodecylthio)thioformyl]sulfanyl}succinic acid (DCTSS), and the initiator composition is 4'4- Azobis(cyanovaleric acid), the mixed solvent is composed of absolute ethanol and butanone, and the neutralizing agent is composed of triethylamine, and its composition formula is as follows:

[0040] The mass ratio of acrylic acid to isobornyl acrylate is 1:3, and the molar ratio of acrylic acid to 2-{[(dodecylthio)thioformyl]sulfanyl}succinic acid (DCTSS) is 80:1.

[0041]

[0042] First, acrylic acid macromolecular chain transfer agent (PAA-RAFT) was synthesized. Dissolve 1.65 grams of DCTSS in 80 grams of mixed solvent, add it to a reaction kettle equipped with a thermometer, a stirrer, a temperature-controlled heating device and a condensing reflux device, and raise the temperature t...

Embodiment 2

[0049] 1) Preparation of structured amphiphilic block copolymers by RAFT polymerization

[0050] The monomer composition is acrylic acid and isobornyl acrylate, the RAFT reagent composition is 2-{[(dodecylthio)thioformyl]sulfanyl}succinic acid (DCTSS), and the initiator composition is 4'4- Azobis(cyanovaleric acid), the mixed solvent is composed of absolute ethanol and butanone, and the neutralizing agent is composed of triethylamine, and its composition formula is as follows:

[0051] The mass ratio of acrylic acid to isobornyl acrylate is 1:4, and the molar ratio of acrylic acid to 2-{[(dodecylthio)thioformyl]sulfanyl}succinic acid (DCTSS) is 80:1.

[0052]

[0053] First, acrylic acid macromolecular chain transfer agent (PAA-RAFT) was synthesized. Dissolve 1.65 grams of DCTSS in 80 grams of mixed solvent, add it to a reaction kettle equipped with a thermometer, a stirrer, a temperature-controlled heating device and a condensing reflux device, and raise the temperature t...

Embodiment 3

[0060] 1) Preparation of structured amphiphilic block copolymers by RAFT polymerization

[0061] The monomer composition is acrylic acid and isobornyl acrylate, the RAFT reagent composition is 2-{[(dodecylthio)thioformyl]sulfanyl}succinic acid (DCTSS), and the initiator composition is 4'4- Azobis(cyanovaleric acid), the mixed solvent is composed of absolute ethanol and butanone, and the neutralizing agent is composed of triethylamine, and its composition formula is as follows:

[0062] The mass ratio of acrylic acid to isobornyl acrylate is 1:5, and the molar ratio of acrylic acid to 2-{[(dodecylthio)thioformyl]sulfanyl}succinic acid (DCTSS) is 80:1.

[0063]

[0064]

[0065] First, acrylic acid macromolecular chain transfer agent (PAA-RAFT) was synthesized. Dissolve 1.65 grams of DCTSS in 80 grams of mixed solvent, add it to a reaction kettle equipped with a thermometer, a stirrer, a temperature-controlled heating device and a condensing reflux device, and raise the t...

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Abstract

The invention discloses a polymer emulsion and a preparation method thereof. The polymer emulsion comprises the following steps: (1) preparing an amphipathic block copolymer with a regular structure by an RAFT (reversible addition fragmentation chain) polymerization method, wherein the copolymer comprises the following components in parts by mass: 8-15 parts of hydrophilic unsaturated monomers, 25-40 parts of hydrophobic unsaturated monomers, 0.3-0.8 part of an RAFT reagent, 0.1-0.2 part of an oil-soluble initiator, 30-45 parts of a mixed solvent, 3-6 parts of a neutralizer and 15-25 parts of water; (2) performing emulsion polymerization by taking the amphipathic block copolymer as a macromolecular emulsifier to prepare a target emulsion. The emulsion prepared by the method is excellent in adhesive force to a non-preprocessed polyolefin base material; the macromolecular emulsifier is not easily transferred to the surface of a paint film in a paint film drying process, so that the water resistance of the paint film is improved.

Description

technical field [0001] The present invention relates to a process for preparing polymer emulsions having excellent adhesion on untreated polyolefins. Background technique [0002] One of the main challenges in the plastic coating industry is to achieve excellent adhesion on very hydrophobic plastic (e.g. unpretreated PP, PE) substrates. Due to the low surface energy and strong hydrophobicity of polyolefins, there are no active groups available for reaction. It is difficult for conventional coatings, especially water-based coatings, to obtain good adhesion on the surface. At present, the process technologies to obtain excellent adhesion on unpretreated polyolefin substrates are mainly surface treatment and the use of adhesion promoters. Surface preparation methods are labor-intensive and often uneven. In the automotive coatings industry, chlorinated polyolefins (CPOs) adhesion promoters are widely used on polyolefin substrates for excellent adhesion. CPOs can effectively w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/18C08F293/00C08F2/30C08F2/38C09D133/12
Inventor 夏正斌林晓琼
Owner GUANGZHOU DUBAGN MATERIAL SCI & TECH
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