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Modified polrvinyl chloride composite material and preparation method thereof

A polyvinyl chloride and composite material technology, applied in the field of polymer materials, can solve the problems of low impact resistance, tensile strength, bending strength and modulus loss, material toughness decline, etc., to achieve good impact strength and tensile strength. , excellent comprehensive mechanical properties, the effect of expanding the scope of application

Inactive Publication Date: 2012-03-21
常熟市威腾进出口有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyvinyl chloride (PVC) is widely used because of its light weight, high strength, oil resistance, chemical resistance, excellent electrical performance and low price, but its impact resistance is low and toughness is poor, so the toughening and modification of PVC materials sex in the spotlight
Using elastomers to toughen PVC can improve its toughness, but it will also lead to the loss of its tensile strength, bending strength and modulus. Rigid inorganic fillers contribute to improving the rigidity of polymers, but due to poor interface bonding between inorganic and organic substances, the toughness of the material decreases

Method used

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preparation example Construction

[0031] A preparation method of a modified polyvinyl chloride composite material, comprising the following steps:

[0032] (1) Preparation of polyurethane elastomer: Add polyether diol, chain extender 1, 4-butanediol, and catalyst triethylamine in a four-necked flask equipped with a thermometer, agitator, and vacuum adapter at a mass ratio of 2 : 1: 3, under the conditions of 100-105℃, 0.01MPa, vacuum dehydration and drying for 2-3h, after cooling for later use, as component A of PU elastomer, with liquefied diphenylmethane diisocyanate as component B, group A The molar ratio of component B to component B is 1:1-1.05;

[0033] (2) Dispersion of pretreated nano-silica: using a probe-type ultrasonic generator (frequency 18 kHz, stainless steel probe, sound intensity 15 W / cm 2 ), insert the probe about 2 cm below the surface of the mixed liquid, stir and mix and irradiate with ultrasonic waves, and use the shearing effect of stirring and the ultrasonic cavitation effect of irrad...

Embodiment 1

[0037] A preparation method of modified polyvinyl chloride composite material:

[0038] (1) Preparation of polyurethane elastomer: Add polyether diol with a relative molecular mass of 2000, chain extender 1, 4-butanediol, and catalyst three into a four-necked flask equipped with a thermometer, agitator, and vacuum adapter. Ethylamine is vacuum dehydrated and dried at 100-105°C and 0.01MPa for 2-3 hours according to the mass ratio of 2:1:3. After cooling, it is used as component A of PU elastomer, and liquefied diphenylmethane diisocyanate is used as Component B, the liquefied diphenylmethane diisocyanate is modified by carbodiimide, its -NCO mass fraction is 29.8%, the molar ratio of component A to component B is 1:1-1.05, take out A 13 parts of component, 13 parts of B component for standby;

[0039] (2) Dispersion of pretreated nano-silica: first treat the surface of nano-silica with titanate with a mass fraction of 5%, to obtain pre-treated nano-silica with a particle size...

Embodiment 2

[0042] A preparation method of modified polyvinyl chloride composite material:

[0043] (1) Preparation of polyurethane elastomer: Add polyether diol with a relative molecular mass of 2000, chain extender 1, 4-butanediol, and catalyst three into a four-necked flask equipped with a thermometer, agitator, and vacuum adapter. Ethylamine is vacuum dehydrated and dried at 100-105°C and 0.01MPa for 2-3 hours according to the mass ratio of 2:1:3. After cooling, it is used as component A of PU elastomer, and liquefied diphenylmethane diisocyanate is used as Component B, the liquefied diphenylmethane diisocyanate is modified by carbodiimide, its -NCO mass fraction is 29.8%, the molar ratio of component A to component B is 1:1-1.05, take out A 17 parts of component, 17 parts of B component for standby;

[0044] (2) Dispersion of pretreated nano-silica: first treat the surface of nano-silica with titanate with a mass fraction of 5%, to obtain pre-treated nano-silica with a particle size...

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Abstract

The invention relates to a modified polrvinyl chloride composite material and a preparation method thereof. The modified polrvinyl chloride composite material contains the components in parts by weight as follows: 100 parts of polyvinyl chloride, 1-5 parts of tribasic lead sulfate, 2-6 parts of dibasic lead sulfate, 5-8 parts of pretreated nano silicon dioxide, 26-40 parts of polyurethane elastomer and 1-5 parts of other additives. The polrvinyl chloride composite material is synergistically modified with polyurethane elastomer and nano titanium dioxide, therefore the application range of the polrvinyl chloride is expanded; the strength, the rigidity and the toughness of the product are all taken account of; the impact strength and the tensile strength are excellent; and the modified polrvinyl chloride composite material has wonderful comprehensive mechanical property and is applicable for producing pipe materials or sectional materials.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a modified polyvinyl chloride composite material and a preparation method of a synergistic effect of polyurethane elastomer and nano-titanium dioxide. Background technique [0002] Polyvinyl chloride (PVC) is widely used because of its light weight, high strength, oil resistance, chemical resistance, excellent electrical performance and low price, but its impact resistance is low and toughness is poor, so the toughening and modification of PVC materials Sex is in the spotlight. Using elastomers to toughen PVC can improve its toughness, but it will also lead to the loss of its tensile strength, bending strength and modulus. Rigid inorganic fillers contribute to improving the rigidity of polymers, but due to poor interface bonding between inorganic and organic substances, the toughness of the material decreases. [0003] With the rise and development of nanotechnology, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L75/04C08L75/08C08K13/06C08K9/04C08K3/36B29C47/92B29C48/92
CPCB29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 顾惠忠
Owner 常熟市威腾进出口有限公司
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