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Styrene and halogenated styrene copolymer and preparation method and application thereof

A halogenated styrene and copolymer technology, applied in the field of functionalized polymer materials, can solve the problem that it is difficult to achieve the flame retardant effect of low-molecular-weight flame retardants, the addition amount is limited, and the flame retardant effect is difficult to surpass the resistance of hexabromocyclododecane. problems such as combustion effect, to achieve the effect of reducing migration, reducing additives, and simple synthesis method

Active Publication Date: 2013-03-27
上海容为实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the uniformity of polymer blending and dispersion, it is difficult to achieve, and the uniformity of dispersion of low-molecular substances in polymers makes it difficult to achieve the flame-retardant effect that low-molecular flame retardants can achieve; at the same time, polymer flame retardants in benzene The solubility of ethylene monomer has an upper limit, and its addition amount is also more limited; the above reasons make it difficult for the flame retardant effect of these solutions to exceed the flame retardant effect of hexabromocyclododecane

Method used

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  • Styrene and halogenated styrene copolymer and preparation method and application thereof
  • Styrene and halogenated styrene copolymer and preparation method and application thereof
  • Styrene and halogenated styrene copolymer and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~12

[0033] Table 2: The formulation amount and process conditions of Examples 1 to 12, the units are parts by weight

[0034]

[0035] The nucleating agent in the table is wax, and the foaming agent is pentane.

Embodiment 1、5

[0037] The raw materials and their consumptions used in the embodiments of the present invention are shown in Table 2.

[0038] Among them, Example 1 and Example 5 adopt the following method: In the reactor, add deionized water and dispersant according to the formula in Table 2, start stirring and heat up to 50~70°C to completely dissolve the dispersant; Mixed solution of brominated styrene and styrene monomer dissolved in initiator, nucleating agent wax (preferably polyethylene wax) and flame retardant (when the addition of brominated styrene monomer is less than 0.8%, add HBCD , to increase the bromine content, as in Example 1) into the reactor, heated to 80 ~ 100 ℃, polymerization reaction 2 ~ 24 hours; seal the reactor, then slowly inject blowing agent pentane, after the injection is complete, mechanically Stir, slowly raise the temperature (about 2~3 hours) to 120~130°C, after complete polymerization, lower to normal temperature, open the cover, and obtain expandable poly...

Embodiment 2~4、6~7

[0039] Embodiment 2~4, 6~7, 9~10, 12

[0040]The raw materials, dosage and reaction temperature are shown in Table 2. The specific method is as follows: In the reaction kettle, add deionized water and dispersant according to the formula in Table 2, start stirring and raise the temperature to 50~70°C to make the dispersant completely Dissolve; mix solution of brominated styrene, styrene monomer and chlorinated styrene monomer dissolved in initiator, nucleating agent wax (preferably polyethylene wax) and flame retardant (when brominated styrene monomer When the addition amount is less than 0.8%, HBCD is added to increase the bromine content, such as in Examples 2 and 3) into the reactor, heated to 80~100°C, cooled after 2~24 hours of polymerization, and filtered to obtain benzene Ethylene and brominated styrene copolymer pellets, such as figure 1 Shown is the infrared spectrum comparison chart of the copolymer (copolymer of bromostyrene and styrene) prepared in Example 10 of th...

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Abstract

The invention discloses a styrene and halogenated styrene copolymer and a preparation method and an application thereof. The copolymer is formed by copolymerization of a styrene monomer and a halogenated styrene monomer, wherein the content of halogenated styrene in the copolymer accounts for 0.1 to 80% by weight percent; and the halogenated styrene has the structure that x is equal to 1 to 5 and R represents Cl or Br or a mixture of Cl and Br. The copolymer is prepared by using a monomer polymerization method and a suspension polymerization method, so that the preparation method is simple and an industrialized application is realized while equipment modification carried out by a polystyrene synthesis factory is not required. The prepared copolymer provided by the invention has good thermal stability, mechanical performance and good flame-retardant performance, and is environmentally friendly. The prepared copolymer is mainly used for preparation of molded expandable polystyrene (EPS) and extruded polystyrene (XPS) foaming products in a flame-retardant level as well as polystyrene plastic or plastic alloy also in the flame-retardant level.

Description

technical field [0001] The invention belongs to the field of functionalized polymer materials, and relates to a polymer material with flame-retardant properties, in particular to a copolymer of styrene and halogenated styrene, its preparation method and its application. Background technique [0002] Copolymerization modification can improve some shortcomings of polymer materials polymerized from a single monomer. It is a relatively effective method for preparing new functional materials. There are many types of styrene copolymer resins, which are prepared by copolymerization of styrene and other monomers. Many novel styrene copolymer resins with excellent properties have been developed to improve specific properties, thereby greatly expanding the application field of styrene resins. On the basis of the poor flame retardancy of polystyrene resins, the present invention combines with halogenated styrene Copolymerization is carried out to form styrene and halogenated styrene co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F212/14C08F2/02C08F2/18C08J9/04C08L25/08C08L25/18
Inventor 王标兵靳茂全
Owner 上海容为实业有限公司
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