N-substituted maleimide heat-resistance modifier containing rare earth, preparation method and application thereof

A technology of maleimide and heat-resistant modifiers, applied in the field of multi-component copolymers, can solve the problems of affecting the performance of PVC and the easy migration of low-molecular organic rare earth heat stabilizers, etc., to achieve higher use temperature, convenient source of raw materials, The effect of good mechanical properties

Inactive Publication Date: 2008-05-28
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Yet at present for the research of maleic acid monoester rare earth, also just it is mixed in polyvinyl chloride as a single component and plays certain thermal stability (see China Plastics, 2002, 16 (1), Liu Jianping; Modern Plastics Processing and Application, 2001, 13(1), Wu Maoying, etc.), and low-molecular organic rare earth heat stabilizers are easy to migrate, affecting the performance of PVC

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of rare earth-containing N-substituted maleimide heat-resistant modifier: in the reactor equipped with stirrer, thermometer, reflux condenser, add 120ml deionized water, 1.5013g emulsifier, pass N 2 , start stirring; in a small beaker, add 3.0009g lanthanum monododecyl maleate, 2.7011g N-cyclohexylmaleimide, 18.9128g methyl methacrylate, 5.4012g styrene to dissolve and mix evenly, pour into the constant pressure dropping funnel. When the temperature in the reactor rises to 75°C, add the initiator: potassium persulfate 0.0892g, start to add the monomer dropwise, maintain 75°C and N 2 Atmosphere, until the monomers are dripped, then the system is heated to 80°C for 1 hour, and then heated to 85°C for 0.5 hours to ensure that the monomers are completely reacted. After the reaction is finished, the product is a white emulsion, which is demulsified with aluminum sulfate eighteen water solution and washed with deionized water to obtain a white powder solid. The ...

Embodiment 2-4

[0042] Operation is the same as in Example 1, except that the consumption of monododecyl lanthanum maleate in the heat-resistant modifier formula is different, as shown in Table 1.

[0043] The glass transition temperature of the heat-resistant modifier of table 1 different monolauryl maleate lanthanum dosages

[0044] Numbering

Embodiment

[0046]The operation is the same as in Example 1, except that what is used is cerium monododecyl maleate, and the specific proportions are as follows: cerium monododecyl maleate 3.0015g, N-cyclohexylmaleimide 2.7008g , 18.9060 g of methyl methacrylate, and 5.4011 g of styrene. The glass transition temperature of the obtained heat-resistant modifier was 124.23°C.

[0047] Examples: 6

[0048] Operation is the same as in Example 1, except that what is used is neodymium monododecyl maleate, and the specific proportioning is as follows: neodymium monododecyl maleate 3.0021g, N-cyclohexylmaleimide 2.7014g , 18.9005 g of methyl methacrylate, and 5.4029 g of styrene. The glass transition temperature of the obtained heat-resistant modifier was 123.79°C.

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PUM

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Abstract

The invention relates to a N-substituted maleimide heat resistant modifier containing rare-earth, which is prepared by following steps that processes raw materials, adds water, emulsifier, and initiator into a reactor, adds mixture monomer of N-substituted maleimide, maleate rare-earth, methyl methacrylate and phenylethene, increases temperature and reacts, demulsifies via octadecanoic hydrone aluminum sulfate solution, washes and dries, to obtain N-substituted maleimide heat resistant modifier containing rare-earth. The inventive heat resistant modifier can improve heat resistance and stability of PVX, while the soften point of the blended and modified PVC vicat is improved 4.7DEG C than pure PVC, the initial heat decomposition temperature is improved 6.70DEG C than pure PVC, and temperature at 50% of heat loss is improved 17.31DEG C than pure PVC. The blended and modified PVC has better mechanical property, which impact strength and tensile strength are respectively improved 1.62% and 3.35% than pure PVC.

Description

technical field [0001] The invention relates to the preparation of multi-component copolymers with certain heat resistance through copolymerization of heat-resistant modified monomers and organic rare earths, in particular to a rare earth-containing N-substituted maleimide heat-resistant modifier and its preparation method and apply. Background technique [0002] Polyvinyl chloride (PVC) is currently one of the most widely used general-purpose plastics with the largest output. It has the advantages of cheap price, good transparency, flame retardant, good electrical insulation and chemical resistance. A variety of molding methods can produce soft or hard plastic products with different properties and a wide range of uses. But the heat resistance of PVC hard products is poor, its heat distortion temperature is 78 ~ 80 ℃, the continuous use temperature is only about 65 ℃, and PVC is easy to decompose during processing, which greatly limits the application range of PVC. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F212/08C08F2/24C08L27/06C08F222/02
Inventor 王月欣王志岭余迎新张倩张俊然陈树东
Owner HEBEI UNIV OF TECH
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