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Organic silicon modified vinyl acetate ternary composition and preparation method thereof

A vinyl acetate, ternary composition technology, applied in coatings, anti-corrosion coatings, etc., can solve the problems of difficulty in fully reflecting the excellent characteristics of silicone, the influence of emulsion storage stability, and the inability to meet high-end requirements, and achieve high and low temperature resistance. Good performance, low price, low surface energy effect

Active Publication Date: 2021-06-15
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low silicon content, it is difficult to fully reflect the excellent characteristics of silicone modified vinyl acetate, which cannot meet the high-end demand
Moreover, when organosiloxane and vinyl acetate are copolymerized to prepare organosilicon-modified vinyl acetate emulsion, because the organosilicon monomer is easily hydrolyzed and cross-linked, and the storage stability of the emulsion is greatly affected, only low organic silicon can be prepared. Organosiloxane Modified Vinyl Acetate Emulsions with Silicon Content
This limits the wider application of silicone modified vinyl acetate emulsion

Method used

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  • Organic silicon modified vinyl acetate ternary composition and preparation method thereof
  • Organic silicon modified vinyl acetate ternary composition and preparation method thereof
  • Organic silicon modified vinyl acetate ternary composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] First, 50 parts of vinyl acetate, 10 parts of vinyltrimethoxysilane, 5 parts of vinyl nonanoate and 5 parts of azobisisobutyronitrile initiator were mixed at room temperature to obtain monomer mixture I.

[0066] Then, weigh 5 parts of aminopropyldimethoxysiloxane-terminated polymethylmethoxysiloxane oligomer with chain number (n=40, m=2), 3 parts with chain number ( p=40) methoxy hyperbranched siloxane was mixed with 1 part of azobisisobutyronitrile initiator to prepare monomer mixture II.

[0067] Add the monomer mixture I into a 500ml four-neck flask equipped with a stirrer and a condensing device, and apply a nitrogen layer (10L / h). The stirring speed of the stirrer was set at 80 r / min, and the reaction temperature in the reactor was set at 125°C. Once the temperature in the reactor was reached, monomer mixture II was fed into the reactor over 4 hours.

[0068] Finally, 1 part of azobisisobutyronitrile initiator was added as a booster within one hour and incubated...

Embodiment 2

[0076] First, 50 parts of vinyl acetate, 10 parts of vinyltriethoxysilane, 5 parts of vinyl caprate and 5 parts of azobisisovaleronitrile initiator were uniformly mixed at room temperature to obtain monomer mixture I.

[0077] Then, weigh 5 parts of polymethylpropoxysiloxane oligomer terminated by aminophenyldiethylsiloxane with chain number (n=45, m=3), 4 parts with chain number (p =60) Methoxy hyperbranched siloxane is mixed with 1 part of azobisisobutyronitrile initiator to obtain monomer mixture II.

[0078] Add the monomer mixture I into a 500ml four-neck flask equipped with a stirrer and a condensing device, and apply a nitrogen layer (10L / h). The stirring speed of the stirrer was set at 80 r / min, and the reaction temperature in the reactor was set at 125°C. Once the temperature in the reactor was reached, monomer mixture II was fed into the reactor over 4 hours.

[0079] Finally, 1 part of azobisisoheptanonitrile initiator was added as a booster within one hour and in...

Embodiment 3

[0085] First, 60 parts of vinyl acetate, 3 parts of vinyltriethoxysilane, 5 parts of vinyl caprate and 5 parts of azobisisoheptanonitrile initiator were mixed to prepare monomer mixture I.

[0086] Then, weigh 6 parts of polypropylethoxysiloxane oligomers terminated with aminopropylmethylethoxysiloxane (n=50, m=4), 3.9 parts of chain members (p=4) 50) Mix methoxy hyperbranched siloxane with 1 part of dimethyl azobisisobutyrate initiator to prepare monomer mixture II.

[0087] Add the monomer mixture I into a 500ml four-neck flask equipped with a stirrer and a condensing device, and apply a nitrogen layer (10L / h). The stirrer is set at 80r / min, and the temperature is set at 120°C. Once the temperature in the reactor was reached, monomer mixture II was fed into the reactor over 4 hours.

[0088] Finally, 1 part of lauroyl peroxide initiator was added as a booster within one hour and incubated at 120°C for one hour. Finally, it is cooled to below 80°C to prepare a ternary comp...

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Abstract

The invention relates to an organic silicon modified vinyl acetate ternary composition which comprises the following components: 65-80 parts by weight of a copolymer unit A of siloxane modified vinyl acetate; 5-15 parts by weight of an aminoalkyl terminated siloxane oligomer unit B; and 3-10 parts by weight of a hyperbranched polysiloxane unit C. The copolymer unit A of siloxane modified vinyl acetate can improve the water resistance, weather resistance and mechanical stability of the composition as a film-forming coating material on the surface of concrete. The aminoalkyl-terminated siloxane oligomer unit B can improve the adhesive property, water resistance, high temperature resistance and weather resistance of the organic silicon modified vinyl acetate ternary composition as a coating. The hyperbranched polysiloxane unit C facilitates film coating when the organic silicon modified vinyl acetate ternary composition is used as a coating, and the thermal stability and corrosion resistance of the coating can be improved.

Description

technical field [0001] The invention relates to a film-forming coating material on concrete surfaces, in particular to an organosilicon-modified vinyl acetate ternary composition mainly used on the inner and outer walls of bridges, wharfs, commercial buildings, and family houses and a preparation method thereof. Background technique [0002] With the development of science and technology and the improvement of human living standards, the requirements for film-forming coatings on concrete surfaces are becoming more and more stringent, not only requiring excellent water resistance, weather resistance and durability, but also low surface energy and room temperature curing. , and put forward stricter requirements for high environmental protection and low cost. [0003] Coatings made of polyvinyl acetate (PVAC) are widely used in construction, furniture, leather, packaging and other industries because of their non-toxic, harmless and low price. However, polyvinyl acetate contain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D131/04C09D183/08C09D183/06C09D7/65C09D5/08C08F218/08C08F230/08C08F220/40
CPCC08F218/08C08L2205/02C08L2205/03C09D5/08C09D131/04C09D7/65C08F230/085C08F220/40C08L83/08C08L83/06
Inventor 张群朝张倩王思蒋涛郝同辉
Owner HUBEI UNIV
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