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Method for preparing compound material of modified polyvinyl chloride resin and thermosetting resin

A technology of polyvinyl chloride resin and resin composite materials, which is applied in the field of preparation of polyvinyl chloride composite materials, can solve the problems of high brittleness and can not meet the requirements of material toughness, etc., and achieves high impact strength, avoids degradation, and has good adaptability. Effect

Active Publication Date: 2009-10-14
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether it is PVC or thermosetting resin, they are brittle, and the composite material composed of the two cannot meet the toughness requirements of the product in many aspects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Mix 90 grams of PVC resin powder, 1 gram of butyltin stabilizer, and 9 grams of epoxy resin containing curing agent at room temperature, then put the mixture into a mold at 160° C., and cure it for 30 minutes at 20 MPa to obtain PVC / ring Oxygen resin composite materials, the measured mechanical properties are shown in Table 1.

Embodiment 2

[0030] Example 2 90 grams of PVC and 10 grams of nano-montmorillonite in Example 1 were dissolved in 1000 ml of tetrahydrofuran, stirred for 60 minutes, poured into 1000 ml of hexane for precipitation, filtered, dried and pulverized to obtain modified PVC resin powder.

[0031] The PVC resin powder in Example 1 was replaced by the above-mentioned modified PVC resin powder, and other conditions were the same as in Example 1 to obtain a modified PVC / epoxy resin composite material. The measured mechanical properties are shown in Table 1.

Embodiment 3

[0032] Example 3 80 grams of PVC, 0.5 grams of nano silicon dioxide and 19.5 grams of EVA were dissolved in 1000 ml of dimethylformamide, stirred for 60 minutes, poured into 1000 ml of water for precipitation, filtered, dried and pulverized to obtain modified PVC resin powder.

[0033] Mix 29 grams of the above-mentioned modified PVC resin powder, 1 gram of barium stearate stabilizer, 20 grams of isocyanate and 50 grams of epoxy resin containing curing agent described in Example 1 at room temperature, and then put the mixture into a mold at 120 ° C In the process, cured at 40MPa for 120 minutes to obtain a PVC / epoxy resin composite material, the measured mechanical properties are shown in Table 1.

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PUM

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Abstract

The invention provides a method for preparing a compound material of modified polyvinyl chloride resin and thermosetting resin. The method adopts the solution blending process to obtain modifier-PVC blended solution and then the blended solution is precipitated to obtain PVC modified resin powder with high porosity. The resin powder is blended with the thermosetting resin and a curing agent at room temperature, and then molding and curing are carried out to obtain the compound material with better comprehensive performance. The solution blending method is adopted for obtaining the inorganic nanoparticle modified PVC resin powder, thereby avoiding the degradation of the PVC caused by high-temperature melt blending method, and the method can particularly ensure the own performance of the PVC resin and simultaneously achieve the nano-compound with modified particles to the maximum extent for the PVC with high degree of polymerization. The obtained modified PVC resin has good absorption and swelling abilities for plasticizers and the thermosetting resin and good adaptability with molding process. The impact strength of the material prepared by compound of the modified PVC resin and the thermosetting resin is improved by more than 2 times.

Description

technical field [0001] The invention relates to a preparation method of a polyvinyl chloride (PVC) composite material, in particular to a preparation method of a composite material composed of a modified polyvinyl chloride resin and a thermosetting resin. technical background [0002] Polyvinyl chloride (PVC) products have excellent comprehensive properties such as good mechanical properties and electrical properties, corrosion resistance, flame retardancy, etc., coupled with low prices and wide sources of raw materials, etc., are widely used in chemical building materials and other fields. In some developed countries, the application proportion of rigid PVC (U-PVC) products has accounted for more than 65% of the total amount of PVC products. PVC is a general-purpose resin with a wide range of uses, but its application as a structural material is limited due to its high melt viscosity and poor impact resistance. Modifiers currently used are mostly elastomers (such as thermo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/22C08K3/34C08K3/36C08L23/08C08K3/26C08K3/22C08K5/098
Inventor 唐涛姜治伟邱健
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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