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Fireproof polyvinyl acetate emulsion and preparation method thereof

A technology of vinyl acetate and polyvinyl acetate, applied in the direction of fireproof coatings, monocarboxylic ester copolymer adhesives, adhesive types, etc., can solve the problem that the fireproof effect is not obvious, the fireproof material loses fireproof performance, and the molecular weight is small and other problems, to achieve the effect of improving interface compatibility, good fire prevention effect, and small amount of addition

Inactive Publication Date: 2011-05-04
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When melamine, urea and polyol are used as fire retardants, due to their small molecular weight, they are easy to precipitate from the membrane material in a humid environment, making the fireproof material lose its fireproof performance
Liu Junhui et al. (Paint Industry, 2008, 38 (6): 46) preliminarily discussed the impact of montmorillonite on the fire performance of vinegar-acrylic emulsion, and found that montmorillonite has a certain effect on improving the mechanical properties and fire performance of the coating, but The fire protection effect is not very obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]Add 0.3 parts of sodium lauryl sulfate, 0.3 parts of octylphenol polyoxyethyl ether (OP-10), and 0.2 parts of bishydroxide to 60 parts of water and stir for 10 minutes at room temperature. Dissolve 0.2 parts of potassium persulfate in 20 parts of water, and mix well with 10 parts of vinyl acetate and 10 parts of butyl acrylate. At 68°C, the mixed monomer and initiator were added dropwise while stirring. The monomer and initiator were dropped over 1.0 hour. After monomer and initiator are added dropwise, react at a constant temperature of 68°C for 0.5 hours, raise the temperature of the reaction system to 80°C, keep the reaction for 1.0 hour, cool down to room temperature, adjust the pH value to 10, and discharge. Add 10 parts of ammonium polyphosphate with a degree of polymerization of 30 to the obtained reaction system, mix the system evenly, and obtain a fireproof polyvinyl acetate copolymer emulsion.

Embodiment 2

[0029] Add 1 part of sodium dodecylsulfonate, 2 parts of Tween-60, 0.5 part of magnesium hydroxide and 6 parts of hydroxymethylcellulose (dissolved first) into 20 parts of water and stir at room temperature for 20 minutes. Dissolve 2.5 parts of ammonium persulfate in 15 parts of water, and mix well with 20 parts of vinyl acetate and 40 parts of ethyl acrylate. At 50°C, add the mixed monomer and initiator dropwise while stirring. Monomer and initiator were dropped over 2.5 hours. After monomer and initiator are added dropwise, react at a constant temperature of 50°C for 1.0 hour, raise the temperature of the reaction system to 90°C, keep the reaction for 1.5 hours, cool down to room temperature, adjust the pH value to 11, and discharge. Add 20 parts of ammonium polyphosphate with a degree of polymerization of 100 and 1 part of magnesium hydroxide to the obtained reaction system, mix the system uniformly, and obtain a fireproof polyvinyl acetate copolymer emulsion.

Embodiment 3

[0031] Add 1 part of octadecyltrimethylammonium bromide, 3 parts of Tween-20, 0.3 parts of montmorillonite and 5 parts of polyvinyl alcohol-0588 (dissolved first) into 30 parts of water and stir at 50 °C 30 minutes. Dissolve 2 parts of ammonium persulfate in 10 parts of water, and mix well with 30 parts of vinyl acetate and 25 parts of n-octyl methacrylate. At 50°C, add the mixed monomer and initiator dropwise while stirring. Monomer and initiator were dropped over 2.0 hours. After monomer and initiator are added dropwise, react at a constant temperature of 50°C for 1.5 hours, raise the temperature of the reaction system to 85°C, keep the reaction for 1.5 hours, cool down to room temperature, adjust the pH value to 5, and discharge. Add 50 parts of ammonium polyphosphate with a degree of polymerization of 200 and 2 parts of montmorillonite to the obtained reaction system, mix the system evenly, and obtain a fireproof polyvinyl acetate copolymer emulsion.

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Abstract

The invention relates to a fireproof polyvinyl acetate emulsion and a preparation method thereof. The grain diameter of the main fireproof composition of the fireproof type polyvinyl acetate emulsion, namely the gain diameter of ammonium polyphosphate, is small. Meanwhile, inorganic padding has stronger hydrogen bonding force to polyvinyl acetate or polyvinyl acetate copolymer, and the grains of the inorganic padding are small, which can avoid a series of problems caused by adopting an additional fireproofing agent of the prior art. The fireproof polyvinyl acetate emulsion disclosed by the invention has favorable bond strength, favorable film-forming performance, etc., and is very valuable to be used in the aspects of an indoor and outdoor fireproof coating, a weaving cloth fireproof finishing agent, a fireproof binding agent, and the like. Meanwhile, no harmful substances are produced in the process of production and use of the fireproof polyvinyl acetate emulsion, and the productive process of the fireproof polyvinyl acetate emulsion is simple, and is easy to control.

Description

technical field [0001] The invention belongs to the technical field of fireproof polyvinyl acetate emulsion and its preparation method, and in particular relates to a halogen-free high-efficiency fireproof polyvinyl acetate emulsion and its preparation method. Background technique [0002] Since the 1930s, when organic polymer materials entered various fields of the national economy and all aspects of people's lives, human beings began to face new fire threats. The reason is that most of these materials are flammable or combustible. In 2008, a total of 133,000 fires occurred in my country (excluding forests, grasslands, armies and mines), 1,385 people died, 684 people were injured, and the direct property loss was 1.5 billion yuan. Therefore, the research on the fire prevention of polymer materials has important practical significance. [0003] Polyvinylacetate (polyvinylacetate, referred to as PVA, PVAc), also known as polyvinyl acetate , poly Vinyl acetate resin (vi...

Claims

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Application Information

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IPC IPC(8): C08L31/04C08L33/08C08L33/10C08K3/22C08K3/34C08K3/32C08F118/08C08F218/08C08F220/18C08F2/24C09D131/04C09D133/08C09D133/10C09D5/18C09J131/04C09J133/08C09J133/10C09J11/04D06M15/333D06M15/263D06M11/71
Inventor 刘白玲赵春霞罗荣陈华林
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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