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Flame-retardant polyacrylic acid plastic, and preparation method and application thereof

A technology of flame retardant polypropylene and acrylic monomers, applied in the field of functional materials, can solve the problems of difficult, unusable, and difficult PMMA flame retardant, and achieve excellent flame retardant effect, reduced viscosity, and good solubility. Effect

Inactive Publication Date: 2018-06-01
南通诺为新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polymethyl methacrylate is easy to burn, and its limited oxygen index is only 17.3. It is a pity that it cannot be used in many places where flame retardancy is required.
However, the flame retardant of PMMA is not easy, because PMMA is mostly used in the transparent field, which must not only maintain transparency, but also meet the requirements of fire protection. There are very few such flame retardants! Available flame retardants at home and abroad are: Sandoflame5060, bromophosphate CBP, dimethyl methylphosphonate DMMP, diethylhexyl tetrabromophthalate TBPH, etc. However, these flame retardants should be It is also quite difficult to reach the UL94V0 level, and the added amount often reaches more than 30% or even 40%, which is why there are few flame-retardant transparent PMMA materials on the market

Method used

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  • Flame-retardant polyacrylic acid plastic, and preparation method and application thereof
  • Flame-retardant polyacrylic acid plastic, and preparation method and application thereof
  • Flame-retardant polyacrylic acid plastic, and preparation method and application thereof

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Experimental program
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Effect test

specific Embodiment 1

[0051] Described semi-continuous method concrete operation is as follows:

[0052] First put all the water, emulsifier, initiator, auxiliary agent, etc. into the reactor, stir and heat up; mix all the monomers and place them in the titration device, when the temperature in the reactor rises to the polymerization temperature of 75-78 ℃, and when blue fluorescence appears, drop the mixed monomer into the reactor evenly; usually after all the monomers have been added dropwise, raise the temperature to 85-90℃ and keep it warm for 1 hour. The conversion rate is >98%, the temperature is lowered to about 40-50°C, and ammonia water is added to adjust the pH value to 8-9, and then the material can be discharged.

specific Embodiment 2

[0053] Described seed polymerization concrete operation is as follows:

[0054] Put all the water, emulsifier, auxiliary agent and a small amount of monomer into the reactor as the initial feed, stir, and raise the temperature to a polymerization temperature of 75-78°C; add a small amount of initiator to initiate the polymerization reaction, and after the reaction is basically completed, separate them evenly Add monomers and initiators dropwise; after dropping, raise the temperature to 85-90°C, keep warm until the conversion rate is >98%, lower the temperature to 40-50°C, adjust the pH value to 8-9, and then discharge.

specific Embodiment 3

[0055] Described pre-emulsification method concrete operation is as follows:

[0056] Put 4 / 5 of the total amount of water, emulsifier, initiator, auxiliary agent and all monomers into the container, stir and emulsify quickly at room temperature for 30 minutes; then put 1 / 3 of the pre-emulsion and 1 / 5 of the water into the reaction Stir in the container; heat up to the polymerization temperature, add the remaining pre-emulsion solution dropwise after 0.5-1 hour of reaction, and finish dropping within 3 hours; keep warm until the conversion rate is >98%, lower the temperature, adjust the pH value, and then discharge.

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Abstract

The invention discloses a flame-retardant polyacrylic acid plastic, and a preparation method, composition and application thereof. Samples prepared in the invention are obviously improved in flame resistance; longer time is needed to ignite the samples; the samples realizes self-extinguishing in the air; and smoke density in resin combustion is obviously reduced. An ionic liquid fire retardant used in the invention can also be used for preparation of a cast plate. Besides conventional acrylic acid monomer, an ionic liquid copolymerization monomer also exists, and the monomer introduces flame-retardant components at the same time. The plastic can be prepared through bulk polymerization or solution polymerization and is eventually applicable to synthetic glass, buildings, advertisements, traffic, medical science and civilian goods, to industrial fields like surface plates and protecting covers of instruments, and to illumination fields like covers for fluorescent lamps, pendent lamps andstreet lamps.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a flame-retardant polyacrylic plastic and its preparation method and application. Background technique [0002] The polymers obtained by polymerization of acrylic acid and its esters are collectively referred to as acrylic resins, and the corresponding plastics are collectively referred to as polyacrylic plastics, among which polymethacrylate methyl is the most widely used. The abbreviation code of polymethyl methacrylate is PMMA, commonly known as plexiglass. The polymer transparent material is a polymer compound formed by the polymerization of methyl methacrylate. It is an important thermoplastic that was developed earlier. Plexiglass is widely used in construction, advertising, transportation, medicine, civilian products, and industrial applications: instrument panels and covers, etc., and lighting applications: fluorescent lamps, chandeliers, street lamp shad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F230/02C08F226/06
CPCC08F220/14C08F230/02C08F226/06
Inventor 徐延杰陆风珏
Owner 南通诺为新材料科技有限公司
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