Flame-retardant polyester

A technology of flame retardancy and polyester, which is applied in the field of phosphorus-containing unsaturated polyester, can solve compatibility problems, flame-retardant material precipitation, and limited use range, etc., and achieve the effect of high phosphorus content and stable flame-retardant performance

Inactive Publication Date: 2017-07-14
ETERNAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned flame retardants containing DOPO components have poor compatibility with non-polar solvents or radiation-curable materials (such as vinyl materials) / monomers (such as styrene). Coatings) have compatibility problems, which can easily lead to problems such as uneven distribution of coatings after curing and precipitation of flame-retardant materials, resulting in a limited range of use

Method used

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  • Flame-retardant polyester
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  • Flame-retardant polyester

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preparation example Construction

[0058] The preparation method of the flame-retardant polyester of the present invention uses the monomer (D) as a reactant. Compared with the process using DOPO as a reactant, a flame-retardant polyester with a higher phosphorus content can be obtained, so the flame resistance is higher. good.

[0059] In the method of the present invention, the temperature range of the polymerization reaction can be determined by the selected reaction raw materials; and the time point for terminating the polymerization reaction is determined according to whether the viscosity and acid value of the obtained product reach the desired range. In terms of viscosity, the viscosity range of the obtained phosphorus-containing unsaturated polyester is preferably G-Z (tested with a GARDNER viscometer), such as G-H, I-J, K-L, M-N, O-P, Q-R, R-S, T-U, V-W, W-X or X-Y: In terms of acid value, the range of acid value of the flame retardant polyester of the present invention is not more than 40. If the acid...

Embodiment 1

[0067] Example 1: Preparation of Flame Retardant Polyester (Silicon Free) of Formula IV-1

[0068] First, 627 grams of diethylene glycol and 122 grams of dipropylene glycol were added into a 3-liter round bottom reaction flask, and stirred at 70° C. for 30 minutes. Afterwards, 276 grams of maleic anhydride (ie monomer (B2)) and 1809 grams of 10-(2,5-dicarboxypropyl)-9,10-dihydro-9-oxa-10- Put phosphaphenanthrene-10-oxide into the reaction bottle, and react at 200°C until the acid value is 65 to 75 and the viscosity is 550 to 650 (tested by high temperature viscometer, #3, 150°C, 750 rpm) . Next, add 0.165 grams of 1,4-dihydroxybenzene to the reaction flask, and drop in 323 grams of glycidyl methacrylate at 70°C, then raise the temperature to 95°C and maintain a constant temperature for 3 hours to allow the reaction Until the acid value is 25 to 30, the viscosity is 750 to 850 (tested with a high temperature viscometer, #3, 150°C, 750 rpm) and the viscosity in 35% styrene is ...

Embodiment 2

[0069] Embodiment 2: the preparation of the flame-retardant polyester composition of tool formula IV-1, IV-2 structure

[0070]First, 627 grams of diethylene glycol and 122 grams of propylene glycol were added into a 3-liter round-bottom reaction flask, and stirred at 70° C. for 30 minutes. Afterwards, 276 grams of maleic anhydride (ie monomer (B2)) and 1809 grams of 10-(2,5-dicarboxypropyl)-9,10-dihydro-9-oxa-10- Put phosphaphenanthrene-10-oxide into the reaction bottle, and react at 200°C until the acid value is 65 to 75 and the viscosity is 550 to 650 (tested by high temperature viscometer, #3, 150°C, 750 rpm) . Next, add 0.165 grams of 1,4-dihydroxybenzene to the reaction flask, and drop in 323 grams of glycidyl methacrylate at 70°C, then raise the temperature to 95°C and maintain a constant temperature for 3 hours to allow the reaction Until the acid value is 25 to 30, the viscosity is 750 to 850 (tested with a high temperature viscometer, #3, 150°C, 750 rpm) and the vi...

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Abstract

The invention relates to flame-retardant polyester. The flame-retardant polyester has a structure as shown in a formula I which is described in the specification. In the formula I, each A' is independently selected from the group consisting of residues of diols; each B' and each B'' can be the same or different and are independently selected from the group consisting of residues of saturated or unsaturated anhydrides or acids; C' and C'' can be the same or different and are independently selected from the group consisting of residues of hydrogen and epoxy acrylate compounds under the limiting condition that C' and C" can not be hydrogen simultaneously; a is an integer in a range of 1 to 30; b is an integer in a range of 1 to 30; c is an integer in a range of 1 to 15; and the flame-retardant polyester has an acid value of 20 to 40. The invention also relates to a method for preparing the above-mentioned flame-retardant polyester and a composition containing the flame-retardant polyester.

Description

[0001] This application is a divisional application with filing date: January 16, 2015, application number: 201510022869.0, and title of invention: flame-retardant polyester. technical field [0002] The invention relates to a halogen-free reactive flame-retardant polyester, in particular to a modified phosphorus-containing unsaturated polyester. Background technique [0003] Known flame retardants are roughly divided into halogenated flame retardants, silicon-based flame retardants and phosphorus-based flame retardants, among which halogenated flame retardants have occupied an important position since the 20th century because of their good flame retardancy, The dosage is small, the effect on the performance of the material is small, and the price is moderate. However, due to the environmental pollution caused by halogens, coupled with the fact that halogen-based flame-retardant polymer materials generate a large amount of smoke and corrosive gases during thermal cracking an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08G63/692C08G63/78C09D167/06C09D5/18
CPCC08G63/918C08G63/6926C08G63/6928C08G63/78C08G63/916C09D5/18C09D167/06
Inventor 余品志
Owner ETERNAL MATERIALS CO LTD
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