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Application of maleic anhydride modified polybutadiene as toughening agent in epoxy resin modification

A technology of maleic anhydride and polybutadiene, which is applied in the field of toughening materials, can solve problems such as poor impact resistance, achieve low cost, good mechanical properties, and improve quality

Inactive Publication Date: 2015-05-27
BEIJING YANSHAN SHENGLI RUBBER & PLASTIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cured product is generally brittle and has poor impact resistance, so it is often modified by a toughening agent.
There is no relevant report on the application of maleic anhydride-modified polybutadiene as a toughening agent in epoxy resin modification

Method used

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  • Application of maleic anhydride modified polybutadiene as toughening agent in epoxy resin modification
  • Application of maleic anhydride modified polybutadiene as toughening agent in epoxy resin modification
  • Application of maleic anhydride modified polybutadiene as toughening agent in epoxy resin modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 Preparation of maleic anhydride modified polybutadiene

[0030] In a four-necked glass reaction flask with a volume of 3 liters, add 1000 g of low-molecular polybutadiene (the number average molecular weight is 1030, wherein 1,2-structure accounts for 72%, and the viscosity at 20 ° C is 1200 cP), and then add 300 g di Toluene, 165g maleic anhydride and 2g anti-aging agent 4010NA, blow dry nitrogen, start to stir, the reactants are slowly heated up to 180°C, react for 9h, after the reaction, the temperature drops to 150°C, distill under reduced pressure to remove xylene and unreacted Maleic anhydride, the resulting product is maleic anhydride modified polybutadiene. The viscosity of the product is 38000cP (30°C), and the acid value is 82.5mgKOH / g.

Embodiment 2

[0031] Embodiment 2 Preparation of maleic anhydride modified polybutadiene

[0032] Add 300g of 1,2-low molecular weight polybutadiene (number average molecular weight is 1050), 100g xylene, 30g maleic anhydride and 0.5g antioxidant 264 in a four-necked glass reaction flask with a volume of 1 liter. Inject nitrogen, slowly raise the temperature to 180°C, react for 9 hours, cool down to 150°C, vacuumize to remove xylene and unreacted maleic anhydride, and the obtained product is maleic anhydride-modified polybutadiene. The viscosity of the product is 16000cP (30°C), and the acid value is 52mgKOH / g.

Embodiment 3

[0033] Embodiment 3 Preparation of maleic anhydride modified polybutadiene

[0034] In a four-necked glass reaction flask with a volume of 1 liter, add 500 g of 1,2-polybutadiene (the number average molecular weight is 1000, of which 1,2-structure accounts for 68%, and the viscosity at 20 ° C is 1060 cP), and then add 100g of maleic anhydride and 2g of antioxidant 264, passed through dry nitrogen, started to stir, the reactants were slowly heated up to 180°C, reacted for 12h, cooled to 150°C after the reaction, vacuumed, and unreacted maleic anhydride was removed to obtain The product is maleic anhydride modified polybutadiene. The viscosity of the product is 120000cP (25°C), and the acid value is 80mgKOH / g.

[0035] In the above examples 1 to 3, the temperature can be raised to 100°C to 250°C during the reaction, and the reaction time can be 5 to 15h. Antioxidant 4010NA or antioxidant 264 can be antioxidant 1010, antioxidant 300, or antioxidant 736, antioxidant CA, antioxid...

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Abstract

The invention discloses an application of maleic anhydride modified polybutadiene as a toughening agent in epoxy resin modification. The application comprises applying maleic anhydride modified polybutadiene as a toughening agent to epoxy resin modification. Compared with conventional epoxy resin toughened by using carboxyl butyronitrile, the epoxy resin toughened by using maleic anhydride modified polybutadiene is good in mechanical property, and the chemical resistance, the high temperature resistance and the electric property of the epoxy resin are all remarkably improved. The price of maleic anhydride modified polybutadiene is far lower than that of carboxyl butyronitrile, that is, the price is only 1 / 3, so that maleic anhydride modified polybutadiene is low in cost and can be widely applied to the field of toughening agents, and the quality of a product can be remarkably improved.

Description

technical field [0001] The invention relates to the application of maleic anhydride modified polybutadiene as a toughening agent in epoxy resin modification, and belongs to the technical field of toughening materials. Background technique [0002] There are many types of epoxy resins, and the main type used as an adhesive is bisphenol A glycidyl ether type. It is mainly produced by bisphenol A and epichlorohydrin under the action of alkali. Its reaction formula is as follows: [0003] [0004] In the formula, n=19, the average molecular weight is 300-7000, and the epoxy value is 0.02-0.54 equivalent / 100g. [0005] Epoxy resin adhesives have good bonding properties to various metals and most non-metallic materials, and are widely used in industrial sectors such as aviation, military industry, automobiles, electronic appliances, and material processing. Epoxy resin adhesive has the advantages of good process performance, high bonding strength, small shrinkage rate and go...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L51/00C08F279/02C08F222/06
Inventor 王维
Owner BEIJING YANSHAN SHENGLI RUBBER & PLASTIC CO LTD