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Epoxy soybean oil resin based rigid cellular plastic and method for preparing same

A technology of rigid foam plastics and epoxidized soybean oil, which is applied in the field of rigid foam plastics and its preparation, can solve problems such as weak activity, and achieve the effects of improving hydrogen bond strength, improving mechanical strength, and good compatibility

Inactive Publication Date: 2008-10-22
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are 3-4 epoxy groups in the molecular chain of epoxidized soybean oil, but the activity of these epoxy groups is weak

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 100 parts of epoxidized soybean oil, 30 parts of acrylic acid, 0.3 part of hydroquinone, and 0.2 part of N, N-dimethylbenzylamine, and add them to a four-necked bottle equipped with a thermometer, mechanical stirring and a reflux condenser, and put them in an oil bath Heat to 120° C. for 8 hours to react, and measure the acid value of the reaction system to be 49 mgKOH / g. Heating was stopped, and the reaction product was naturally cooled to room temperature to obtain acrylic acid-modified epoxy soybean oleoresin. Its apparent viscosity measured at 30°C is 36800mPa.s.

Embodiment 2

[0034] Get 100 parts of the acrylic acid-modified epoxy soybean oleoresin prepared in Example 1, 0.1 part of hydroquinone, add in a four-necked bottle equipped with a thermometer, a mechanical stirrer and a reflux condenser, heat to 70 ° C, and then add 16.3 One part of maleic anhydride and two parts of N,N-dimethylbenzylamine were heated to 80°C for 1.5 hours and the acid value of the reaction system was measured to be 130 mgKOH / g. Stop heating, allow reaction product to cool down to room temperature naturally, obtain acrylic acid-maleic anhydride modified epoxy soybean oleoresin. Its apparent viscosity measured at 30°C is 53600mPa.s.

Embodiment 3

[0036] Get 100 parts of acrylic modified epoxy soybean oleoresins prepared in Example 1, 25 parts of styrene, 2 parts of acrylic acid, 2 parts of sodium bicarbonate, 5 parts of benzoyl peroxide, 3 parts of foam stabilizer (Tween 80) , put 5 parts of 10% N,N-dimethylaniline styrene solution in a beaker, stir evenly, place the beaker in a water bath at 75°C and stir for about 6 minutes, then add 6 parts of water into the system, After stirring at high speed until it turns white, quickly pour it into a mold that has been preheated to 75°C and foam freely. After the foam rises, put it into an oven at 120°C and cure it for 2 hours to obtain the epoxy soybean oil resin-based foam plastic, and its properties are shown in Table 1.

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Abstract

The invention discloses epoxidized soybean oil resin-matrix rigid foam plastic and a method for preparing the same. The plastic is obtained by synthesizing compositions with the following weight portions: 100 portions of epoxidized soybean oil resin, 10 to 60 portions of vinyl monomers, 1 to 6 portions of vesicant, 1 to 4 portions of foam stabilizer, 4 to 10 portions of evocating agent, 2 to 6 portions of accelerant, 2 to 10 portions of water, and 0 to 20 portions of sisal fibers. The epoxidized soybean oil resin-matrix rigid foam plastic prepared by the invention has good performance, the density is between 0.1g / cm <3> and 0.3g / cm <3>, the compressive strength is between 300 and 3500kPa, the performance approaches that of the prior thermosetting rigid foam plastic, and the plastic can be used for building materials, furniture materials, heat insulating and sound-insulating materials and so on. Reinforced fiber and main matrix resin of the plastic both derive from renewable resources, so the plastic has full biodegradation performance and is an ideal substitute for treating 'white pollution'.

Description

technical field [0001] The invention relates to a biodegradable rigid foam plastic and a preparation method thereof, in particular to a modified epoxy soybean oil resin-based rigid foam plastic and a preparation method thereof. Background technique [0002] Rigid foam plastics are widely used in construction, furniture, petrochemical, transportation, shipbuilding and other industrial sectors as structural panels, thermal insulation, and sound insulation materials. Traditional rigid foams are mostly prepared from petroleum derivatives, which are non-renewable resources, such as phenolic resins, unsaturated resins, epoxy resin foams, etc. The waste of such foamed plastics is difficult to degrade naturally, which brings a serious burden to the environment. For this reason, it is of great significance to prepare biodegradable rigid foam plastics from renewable resources. In recent years, the preparation of biodegradable polymer materials from vegetable oil has attracted increa...

Claims

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Application Information

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IPC IPC(8): C08L63/10C08K5/00C08J9/08C08J5/04
CPCC08G59/027C08L63/10
Inventor 容敏智吴素平章明秋
Owner SUN YAT SEN UNIV
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