High bath strength acrylic resin with long branched chain structure

A technology of high melt strength and polypropylene resin, which is applied in the field of polypropylene resin materials, can solve the problems that the excellent characteristics of polypropylene cannot be fully utilized, and achieve the effects of shortening the molding cycle, good transparency, and easy mastery of the process

Inactive Publication Date: 2009-01-07
东莞金富亮塑胶颜料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, polypropylene can be blended with PBT, PA, LDPE, etc. to improve the melt strength, but the reaction process is accompanied by chain degradation, which cannot fully utilize the excellent characteristics of polypropylene.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A high-melt strength polypropylene resin containing a long-chain branched structure, comprising the following components by weight percentage: homopolypropylene 68%; macromonomers with peroxy groups are composed of styrene and 1-( 2-tert-butylperoxyisopropyl)-3-isopropenylbenzene is obtained by copolymerization at a temperature of 100°C, accounting for 30%; the grafting accelerator is triallyl triisocyanurate, accounting for 1.5%; Auxiliaries include: antioxidant tetrakis-[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester, accounting for 0.1%, tri-(2,4-di-tert-butyl Phenyl) phosphite, accounting for 0.2%, acid scavenger is calcium stearate, accounting for 0.2%.

[0025] Take by weighing 1360g homopolypropylene, 600g macromonomer with peroxy group, 30g triallyl triisocyanurate graft accelerator, 2g tetrakis-[β-(3,5-di-tert-butyl- 4-hydroxyphenyl) propionic acid] pentaerythritol ester antioxidant, 4g tri-(2,4-di-tert-butylphenyl) phosphite, 4g cal...

Embodiment 2

[0027] A high-melt-strength polypropylene resin containing a long-chain branched structure, comprising the following components by weight percentage: 89% of copolymerized polypropylene; a macromonomer with a peroxy group consisting of acrylonitrile and 1-(2 - Tert-butylperoxyisopropyl)-3-isopropenylbenzene is obtained by copolymerization at a temperature of 100°C, accounting for 10%; the grafting accelerator is trimethylolpropane trimethacrylate, accounting for 0.5% ; Additives are: antioxidant tetrakis-[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, accounting for 0.1%, three-(2,4-di-tert-butyl phenyl) phosphite, accounting for 0.2%, acid scavenger is calcium stearate, accounting for 0.2%.

[0028] Take by weighing 1780g homopolypropylene, 200g macromonomer with peroxy group, 10g trimethylolpropane trimethacrylate graft accelerator, 2g tetrakis-[β-(3,5-di-tert-butyl Base-4-hydroxyphenyl) propionic acid] pentaerythritol ester antioxidant, 4g tri-(2,4...

Embodiment 3

[0030] A high-melt-strength polypropylene resin containing a long-chain branched structure, comprising the following components by weight percentage: homopolypropylene 34%, copolymerized polypropylene 34%; It is obtained by copolymerization of acrylonitrile and 1-(2-tert-butylperoxyisopropyl)-3-isopropenylbenzene at a temperature of 100°C, accounting for 30%; the grafting accelerator is triallyl triisocyanurate Esters, accounting for 1.5%; additives: tetrakis-[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, accounting for 0.1%, three-(2, 4-di-tert-butylphenyl) phosphite accounts for 0.2%, and the acid scavenger is calcium stearate, accounting for 0.2%.

[0031]Take by weighing 680g homopolypropylene, 680g copolymerized polypropylene; 600g macromonomer with peroxy group, 30g triallyl triisocyanurate graft accelerator, 2g tetrakis-[β-(3,5- Di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester antioxidant, 4g tri-(2,4-di-tert-butylphen...

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PUM

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Abstract

The invention relates to the technical field of polypropylene resin materials, in particular to high melt strength polypropylene resin containing a long-chain branch structure, which comprises the following components by weight percentage: 68 percent to 89 percent of polypropylene, 10 percent to 30 percent of macromonomer with peroxy groups, 0.5 percent to 1.5 percent of graft accelerators and additives of the rest. All the components are added into a high-speed mixer to stir and mix evenly, are fed into a double screw extruder with 36:1 to 48:1 L / D to carry out the melt grafting reaction, and are extruded out for granulation after the reaction is completed. The high melt strength polypropylene resin solves the problem of the difficult hot forming of the ordinary polypropylene resin, has higher crystallization temperature, shorter crystallization time and wider processing temperature range, the process is easy to master, thereby hot forming parts are allowed to demolded under a higher temperature to shorten the forming cycle. The high melt strength polypropylene resin can be molded on ordinary hot forming equipment into thin-walled pressure vessels with large draw ratio and uniform vessel wall.

Description

Technical field: [0001] The invention relates to the technical field of polypropylene resin materials, in particular to a high-melt-strength polypropylene resin containing a long-chain branched structure. Background technique: [0002] Polypropylene is one of the general-purpose thermoplastics. It has the characteristics of high melting point, good heat resistance, low density, excellent mechanical properties and good chemical stability. It is widely used in packaging materials, mechanical parts, household appliances, medical equipment, synthetic fiber and other fields. However, because the molecular chain of conventional polypropylene has only a linear structure, its molecular weight distribution is narrow, and the processing temperature range is relatively narrow, resulting in a sharp drop in its melt strength when the temperature is higher than the crystallization melting point, which directly causes some defects in the melt processing of polypropylene. Such as low melt ...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08F2/44C08K5/134C08K5/526C08K5/098B29C47/92B29C48/40B29C48/92
CPCB29C47/92B29C48/92B29C2948/92704B29C48/04B29C48/40B29C48/625B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 覃碧勋柯金成唐敬海
Owner 东莞金富亮塑胶颜料有限公司
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