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Silicone (methyl)acrylate ABA-type block copolymer, and preparation method and application thereof

A technology of block copolymer and acrylate, applied in the direction of coating, etc., can solve the problems of lack of modification effect, poor stability, and reduced coating adhesion ability, etc., achieve good water resistance, improve stability, and improve overall performance Effect

Inactive Publication Date: 2012-07-04
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

[0005] The above method cannot achieve the modification effect when the organic silicon content is low. When the organic silicon content reaches a certain level, it will be crosslinked again, and the stability is poor, and the preparation is often a random copolymer. When the organic silicon content is high, the adhesion of the coating will be reduced. ability

Method used

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  • Silicone (methyl)acrylate ABA-type block copolymer, and preparation method and application thereof
  • Silicone (methyl)acrylate ABA-type block copolymer, and preparation method and application thereof
  • Silicone (methyl)acrylate ABA-type block copolymer, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Table 1: Composite coating of the present invention and performance (I)

[0048] formula

Silicone methacrylate ABA type block

Copolymer: Acrylate Polymer: Other Group

points (mass ratio)

Adhesion

/ class

Connect with water

Tentacle / °

pencil

Hardness

Washable

sex

Resistant to artificial

Ageing

/ 600h

1

0∶100∶102

1

70

H

≤1500

bubbling

fall off

2

15∶85∶102

1

90

H

≥2000

non-foaming

Does not fall off

3

30∶70∶102

1

92

H

≥2500

non-foaming

Does not fall off

4

50∶50∶102

1

97

H

≥2700

non-foaming

Does not fall off

5

70∶30∶102

1

101

H

≥3000

non-foaming

Does not fall off

[0049]...

Embodiment 2

[0055] Composite coating of the present invention and performance (Ⅱ) of table 2

[0056] formula

Methyl propylene for the preparation of block copolymers

Types of esters

Adhesion / level

Connect with water

Tentacle / °

pencil

Hardness

Washable

sex

Resistant to artificial

Ageing

/ 600h

Block Co

Polymer 1

Methyl methacrylate

1

90

H

≥2500

non-foaming

Does not fall off

Block Co

Polymer 2

n-butyl methacrylate, methacrylic acid

methyl ester

1

94

H

≥2500

non-foaming

Does not fall off

Block Co

Polymer 3

Isobutyl Methacrylate, Methacrylic

Octyl Acrylate, Methyl Acrylate

1

95

H

≥2500

non-foaming

Does not fall off

Block Co

Polymer 4

Octyl acrylate, Heptyl methacrylate

1

120

...

Embodiment 3

[0063] (1) Bromine-terminated polysiloxane is prepared as follows: 100 parts by mass of vinyl-terminated polysiloxane (Mn=400), 50 parts by mass of acetone, and 200 parts by mass of saturated hydrogen bromide-acetic acid solution are mixed homogeneous, stirred at 50°C for 5h, the product was extracted 5 times with distilled water, and evaporated at 90°C for 4h with a rotary evaporator.

[0064] (2) Preparation of silicone acrylate ABA block copolymer: 100 parts by mass of methyl acrylate, 1 part by mass of bromine-terminated polysiloxane (Mn=400), 0.1 parts by mass of 2 , 2'-bipyridine and 500 parts by mass of methyl ethyl ketone were mixed evenly, frozen in an ice-salt bath, vacuumed and nitrogen blown 3 times to remove oxygen; then under the protection of nitrogen, the temperature was raised to 30 ° C, and 0.1 parts by mass of cuprous bromide was added React for 25 hours to obtain a silicone acrylate ABA type block copolymer. According to the experimental principle, infrared...

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Abstract

The invention discloses a silicone (methyl)acrylate ABA-type block copolymer, and a production method and application thereof in the preparation of a composite coating. The copolymer has a structure shown in a formula I. The composite coating is prepared by stirring for 1 to 3 hours in a constant-temperature high-speed disperser the following components in part by mass: 1 to 100 parts of silicone(methyl)acrylate ABA-type block copolymer, 0 to 100 parts of (methyl)acrylate polymer, 0.2 to 5 parts of defoamer, 0.2 to 4 parts of dispersing agent, 40 to 100 parts of inorganic salt filler and 50 to 100 parts of solvent. As the two ends of the ABA-type block copolymer are still (methyl)acrylate, a silicone component is added without influencing the adhesive capacity, the smudge resistance and stability of the coating are improved, and the coating has the relatively higher comprehensive performance of water resistance, the smudge resistance, heat resistance, age resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical coatings, and in particular relates to an organosilicon (meth)acrylate ABA type block copolymer, a preparation method thereof and an application in preparing composite coatings. Background technique [0002] Acrylate coatings made of (meth)acrylates as main raw materials are an important type of coatings, which have excellent UV resistance, acid and alkali resistance and oxidation resistance. Because the molecules contain polar ester groups, their Oil resistance and chemical corrosion resistance are also better. However, due to its structural characteristics, (meth)acrylate coatings have poor water resistance while having good adhesion. At the same time, (meth)acrylate polymers, especially linear polymers, tend to be sticky at high temperatures Decreased staining, brittle at low temperature, poor toughness. [0003] In order to improve the overall performance of (meth)acrylate coatings, it is o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C09D153/00C09D133/04
Inventor 刘伟区孙越
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI