Composite nano material modified emulsion and its preparation method

A technology of composite nanomaterials and inorganic nanomaterials, applied in the field of emulsion modified by composite nanomaterials and its preparation, can solve the problems of high surface energy, large amount of residual emulsion, large specific surface area of ​​nanopowder, etc., and achieve improved storage stability Effect

Active Publication Date: 2004-12-22
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large specific surface area and high surface energy of nano-powders, on the one hand, it is easy to produce a large amount of res

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1. Preparation of nanomaterial compound

[0015] 10 parts by weight of nano-alumina powder (particle size 20nm) and 400 parts by weight of nano-silica sol (solid content 25%, average particle size 10nm) are stirred evenly in a container, and then placed in an ultrasonic disperser (power: 800 watts) Disperse until the particle size is less than 120nm to obtain a compound, wherein the nano-alumina powder accounts for 10% of the solid content of the nano-silica sol, and store it for future use.

[0016] 2. The formula of acrylate emulsion is shown in Table 1.

[0017] components

raw material name

Dosage

Monomer

Butyl acrylate

435

Methyl methacrylate

532

acrylic

33

coupling agent

KH570

2

Emulsifier

Sodium dodecyl sulfate

20

Initiator

Ammonium persulfate

6

Deionized water

1500

[0018] 3. Preparation of modified emulsion

...

Embodiment 2

[0021] 1. The same formula and method as in Example 1 were used to prepare the nanomaterial compound.

[0022] 2. The formula of the acrylate emulsion is the same as in Example 1.

[0023] 3. Preparation of modified emulsion

[0024] Add the compound prepared according to the formula and method of Example 1 and 2 / 3 of deionized water (1000 parts) into the reactor to raise the temperature. When the temperature reaches 84-88°C, follow the emulsion polymerization of Example 1 Methods The emulsion polymerization was completed in the presence of the compound, and the acrylate emulsion modified by composite nanomaterials was prepared.

Embodiment 3

[0032] 1. Prepare the composite of nanomaterials according to the formula and method of Example 1.

[0033] 2. The formula of styrene-acrylic emulsion is shown in Table 2.

[0034] components

raw material name

Dosage

Monomer

Butyl acrylate

435

Methyl methacrylate

100

Phenylacetic acid

432

acrylic

33

coupling agent

KH570

2

Emulsifier

MS-1

40

Initiator

Ammonium persulfate

8

Deionized water

1500

[0035] 3. Preparation of modified emulsion.

[0036] Except that the monomers in Table 2 are used to replace the monomers in Table 1 of Example 1, the rest of the operations are the same as in Example 1. The prepared styrene-acrylic emulsion is added to the prepared nanomaterial compound under stirring, and mixed for 0.5 hours to obtain Styrene-acrylic emulsion modified by composite nanomaterials.

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PUM

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Abstract

A composite nano material modified acrylate emulsion is prepared through proportionally mixing aluminium oxide nanoparticles with nano-class silica gel, ultrasonic dispersing, and proportionally mixing the composite nano material with acrylate emulsion for modifying it. It has the greatly improved stability, and resistance to water and alkali.

Description

technical field [0001] The invention relates to an emulsion modified by a composite nano material and a preparation method thereof. Background technique [0002] To modify the emulsion with nanomaterials, nanosols or nanopowders are usually used. To modify the emulsion with nano-sol such as silica sol, physical compounding is generally adopted, that is, the emulsion and nano-sol are mixed under mechanical stirring. Although the emulsion modified in this way has improved film hardness, back tackiness, air permeability and adhesion, etc., it cannot fully exert the modification effect of nano-sol due to physical compounding, and the emulsion after modification is stable in storage. Sex is a problem. In addition, chemical compounding is also used, that is, nano-sol participates in the polymerization reaction of organic monomers, and a certain amount of chemical bonds are formed between nano-sol and latex particles, which improves the compatibility between the two, thereby impr...

Claims

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Application Information

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IPC IPC(8): C08F6/14C08F20/10C08K3/34
Inventor 马胜军李敏
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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