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Styrene phosphonic acid curing agent, synthesis method and application

A technology of styrene phosphonic acid and synthesis method, which is applied in the fields of chemical instruments and methods, compounds of group 5/15 elements of the periodic table, organic chemistry, etc., and can solve problems such as environmental pollution and high volatility of styrene

Pending Publication Date: 2021-05-18
浙江博菲电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, styrene is too volatile, and it is easy to cause great pollution to the environment during use.

Method used

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  • Styrene phosphonic acid curing agent, synthesis method and application
  • Styrene phosphonic acid curing agent, synthesis method and application
  • Styrene phosphonic acid curing agent, synthesis method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) The synthesis of 4-diethyl styrene phosphonate (VPA), its synthetic route is as follows:

[0033]

[0034] Take 2.96g of 4-vinylphenylboronic acid, 0.07g of cuprous oxide, 0.18g of phenanthroline, and 4.16mL of triethylamine into the reaction vessel, add 20mL of acetonitrile, and then add 1.38 g diethyl phosphonite. Open the mouth of the bottle and let it react at room temperature for 24 hours. After the reaction, the filtrate was rotary evaporated and passed through the column with ethyl acetate:petroleum ether=1:1 to obtain orange-yellow oily VPA.

[0035] (2) Synthesis of 4-alpha-methylstyrene phosphonic acid diethyl ester (MVPA), its synthetic route is as follows:

[0036]

[0037] Take 3.24g of 4-α-methylvinylphenylboronic acid, 0.07g of cuprous oxide, 0.18g of phenanthroline, and 4.16mL of triethylamine into the reaction vessel, add 20mL of acetonitrile, and wait for 4-α-methylethylene After the complete dissolution of phenylboronic acid, 1.38 g of di...

Embodiment 2-3

[0041] Steps (1), (2), and (4) in Examples 2 and 3 are the same as in Example 1, only the ratio of VPA to MVPA in step (3) is replaced by 3:1, 5:1 in turn.

Embodiment 4-5

[0043] Steps (1), (2), (4) in embodiment 4 and 5 are the same as in embodiment 1, only the ratio of styrene dilution in step (3) is replaced successively by 70%, 30%, that is Styrene accounts for 30% and 70% by mole of the styrene phosphonic acid curing agent composition.

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Abstract

The present invention provides a styrene phosphonic acid curing agent, the synthesis method and the application; wherein a phosphonate group serves as a flame-retardant group to form a C-P bond through a coupling reaction to synthesize styrene phosphonate, so that the cross-linking performance of the styrene phosphonate serving as an unsaturated polyester resin cross-linking agent is not affected, and the flame-retardant performance of the cross-linked resin is further enhanced; the boiling point of the styrene phosphonate is far higher than that of styrene, and the vapor pressure of the styrene phosphonate is far lower than that of the styrene, so that the volatility of the styrene phosphonate is greatly lower than that of the styrene. In the use process, the styrene phosphonate is not greatly volatilized, so that the environmental pollution is reduced; the difficulty and the cost of the synthesis process of the styrene phosphonate cross-linking agent provided by the invention are far lower than those of introduction of phosphonic acid groups into unsaturated polyester molecules, and the styrene phosphonate cross-linking agent is suitable for cross-linking of various resins, wide in application range, low in cost, high in production efficiency and wide in market prospect.

Description

technical field [0001] The invention relates to a styrene phosphonic acid curing agent, a synthesis method and an application. Background technique [0002] Unsaturated polyester resins are widely used due to their advantages of low cost and good processability. The molecule of unsaturated polyester contains a large number of carbon, hydrogen and oxygen chain segments, so it is easy to burn in case of fire at high temperature. If a flame retardant is added to unsaturated polyester, its flame retardancy can be improved and its flammability can be reduced. [0003] Unsaturated polyester resin is composed of linear oligomers containing unsaturated double bonds and crosslinking agent monomers. Select materials containing flame retardant elements as part of the synthetic raw materials, which are fixed in the molecular chain by the strong force of covalent bonds, which has little effect on the performance of resin materials, and the flame retardant elements will not be precipita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/40C08K5/5333C08L67/06
CPCC07F9/4075C07F9/4021C08K5/5333C08L2201/02C08L67/06
Inventor 胡益栋杨坤霞胡雷胡萧勇虞希高
Owner 浙江博菲电气股份有限公司
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