CN114561101A - Diallyl bisphenol A modified bismaleimide resin capable of prolonging shelf life and preparation method thereof - Google Patents
Diallyl bisphenol A modified bismaleimide resin capable of prolonging shelf life and preparation method thereof Download PDFInfo
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- CN114561101A CN114561101A CN202210338068.5A CN202210338068A CN114561101A CN 114561101 A CN114561101 A CN 114561101A CN 202210338068 A CN202210338068 A CN 202210338068A CN 114561101 A CN114561101 A CN 114561101A
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- diallyl bisphenol
- bismaleimide resin
- modified bismaleimide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/12—Unsaturated polyimide precursors
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Abstract
The invention discloses diallyl bisphenol A modified bismaleimide resin capable of prolonging the shelf life and a preparation method thereof, wherein a silane coupling agent accounting for 0.5 percent of the weight of the diallyl bisphenol A modified bismaleimide resin is added into the diallyl bisphenol A modified bismaleimide resin. Compared with the prior art, the invention prolongs the shelf life of the diallyl bisphenol A modified bismaleimide resin to 3 years from 1 month by adding 0.5 percent of silane coupling agent, further expands the application range of the product and has good economic benefit.
Description
Technical Field
The invention relates to the field of high-temperature-resistant composite resin materials, in particular to diallyl bisphenol A modified bismaleimide resin capable of prolonging the shelf life and a preparation method thereof.
Background
The diallyl bisphenol A modified bismaleimide resin is a kind of polyimide resin, and is mainly used for producing high-temperature resistant composite materials. The addition reaction of diallyl bisphenol A and bismaleimide resin is carried out under certain conditions, so that the two monomers are polymerized together, the temperature resistance of the bismaleimide resin can be improved by adding the diallyl bisphenol A, and meanwhile, the toughness of the bismaleimide resin can be improved. Due to the fact that the activity of the diallyl bisphenol A modified bismaleimide resin is high, precipitation phenomenon (the diallyl bisphenol A and the bismaleimide resin are split into two monomers again, the bismaleimide is solid) is prone to occur in the product storage process, the product is invalid, and the quality guarantee period of the existing product is 1 month.
Disclosure of Invention
The invention aims to provide diallyl bisphenol A modified bismaleimide resin capable of prolonging the shelf life and a preparation method thereof.
In order to achieve the purpose, the invention is implemented according to the following technical scheme:
the first purpose of the invention is to provide a diallyl bisphenol A modified bismaleimide resin capable of prolonging the shelf life, wherein a silane coupling agent accounting for 0.5 percent of the weight of the diallyl bisphenol A modified bismaleimide resin is added into the diallyl bisphenol A modified bismaleimide resin.
The second purpose of the invention is to provide a preparation method of diallyl bisphenol A modified bismaleimide resin capable of prolonging the shelf life, which comprises the steps of adding 3 parts by weight of diallyl bisphenol A into a reaction vessel, heating while stirring, adding 5 parts by weight of bismaleimide resin when the temperature is raised to 80 ℃, heating while stirring, keeping the temperature for 5 hours when the temperature is raised to 150 ℃, adding 0.04 part by weight of silane coupling agent when the reaction is finished, uniformly stirring, and naturally cooling to room temperature to obtain the diallyl bisphenol A modified bismaleimide resin capable of prolonging the shelf life.
Compared with the prior art, the invention prolongs the shelf life of the diallyl bisphenol A modified bismaleimide resin to 3 years from 1 month by adding 0.5 percent of silane coupling agent, further expands the application range of the product and has good economic benefit.
Drawings
FIG. 1 is a picture of the product of the diallyl bisphenol A modified bismaleimide resin of comparative example 1 after being left for one month (30 days).
FIG. 2 is a photograph of a product of an extended shelf life diallylbisphenol A modified bismaleimide resin of the present invention after standing for 3 years (1100 days).
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Example 1
Adding 3kg of diallyl bisphenol A into a reaction vessel, heating while stirring, adding 5kg of bismaleimide resin when the temperature rises to 80 ℃, heating while stirring, keeping the temperature for 5 hours when the temperature rises to 150 ℃, adding 0.04kg of silane coupling agent when the reaction is finished, uniformly stirring, and naturally cooling to room temperature to obtain the diallyl bisphenol A modified bismaleimide resin with the prolonged shelf life.
Example 2
Adding 6kg of diallyl bisphenol A into a reaction vessel, heating while stirring, adding 10kg of bismaleimide resin when the temperature rises to 80 ℃, heating while stirring, preserving the temperature for 5 hours when the temperature rises to 150 ℃, adding 0.08kg of silane coupling agent when the reaction is finished, uniformly stirring, and naturally cooling to room temperature to obtain the diallyl bisphenol A modified bismaleimide resin with the prolonged shelf life.
Example 3
Adding 1.5kg of diallyl bisphenol A into a reaction vessel, heating while stirring, adding 2.5kg of bismaleimide resin when the temperature rises to 80 ℃, heating while stirring, keeping the temperature for 5 hours when the temperature rises to 150 ℃, adding 0.02kg of silane coupling agent when the reaction is finished, uniformly stirring, and naturally cooling to room temperature to obtain the diallyl bisphenol A modified bismaleimide resin with the prolonged shelf life.
Comparative example 1
Adding 1.5kg of diallyl bisphenol A into a reaction vessel, heating while stirring, adding 2.5kg of bismaleimide resin when the temperature rises to 80 ℃, heating while stirring, keeping the temperature for 5 hours when the temperature rises to 150 ℃, and naturally cooling to room temperature after the reaction is finished to obtain the diallyl bisphenol A modified bismaleimide resin.
The resins prepared in comparative example 1 and examples 1-3 are stored respectively, actual detection proves that the shelf life of the diallyl bisphenol A modified bismaleimide resin prepared in comparative example 1 is only 1 month (30 days), and obvious layering phenomenon can be seen after the diallyl bisphenol A modified bismaleimide resin is placed for one month as shown in figure 1; the shelf life of the diallyl bisphenol A modified bismaleimide resins prepared in examples 1-3 was about 3 years, and no delamination occurred after the diallyl bisphenol A modified bismaleimide resins were left for 3 years (1100 days).
In addition, the resin prepared in the comparative example 1 and the resin prepared in the comparative example 1 after being left for 1 month (30 days) are respectively taken for gel time measurement, and the specific process is as follows: 10g of resin is respectively placed on a hot plate at 150 ℃ to be melted into a round piece with the size of 2 square centimeters (the size of a monobasic coin), the round piece is continuously stirred by a glue stick, timing is started simultaneously, 55-65 circles per minute of stirring is preferred, circles are drawn clockwise during stirring until the tested resin is just not adhered to the stirring stick or is about to solidify, the end point of the gelling time is marked, the gelling time of the resin is the end point, the gelling time of the resin is 400 seconds after the resin prepared by practical test in the comparative example 1, and the gelling time of the resin is 200 seconds after the resin is placed for 1 month (30 days), the gelling time is shortened by 50%, and the fact that the resin is failed is shown.
The gel time of the resin obtained in example 1 and the resin obtained in example 1 after 3 years (1100 days) were measured, respectively, by the following procedure: respectively taking 10g of resin, placing the resin on a hot plate at 150 ℃, melting into a round piece with the size of 2 square centimeters (the size of a monobasic coin), continuously stirring by using a glue stick, simultaneously starting timing, preferably 55-65 circles per minute during stirring, clockwise marking a circle during stirring until the tested resin is just not adhered to the stirring stick or is about to solidify, and recording the time as the end point of the gelling time, wherein the gelling time of the resin is recorded, the gelling time of the resin prepared in practical test comparative example 1 is 400 seconds, and the gelling time of the resin after being placed for 3 years (1100 days) is 360 seconds, so that the gelling time is shortened by 10 percent, and the resin is proved to be not invalid.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (2)
1. A diallyl bisphenol A modified bismaleimide resin capable of prolonging the shelf life is characterized in that: and a silane coupling agent accounting for 0.5 percent of the weight of the diallyl bisphenol A modified bismaleimide resin is added into the diallyl bisphenol A modified bismaleimide resin.
2. A method for preparing an extended shelf life diallylbisphenol a modified bismaleimide resin as claimed in claim 1, wherein:
adding 3 parts by weight of diallyl bisphenol A into a reaction vessel, heating while stirring, adding 5 parts by weight of bismaleimide resin when the temperature rises to 80 ℃, heating while stirring, keeping the temperature for 5 hours when the temperature rises to 150 ℃, adding 0.04 part by weight of silane coupling agent when the reaction is finished, uniformly stirring, and naturally cooling to room temperature to obtain the diallyl bisphenol A modified bismaleimide resin with the prolonged shelf life.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210338068.5A CN114561101A (en) | 2022-04-01 | 2022-04-01 | Diallyl bisphenol A modified bismaleimide resin capable of prolonging shelf life and preparation method thereof |
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| CN202210338068.5A CN114561101A (en) | 2022-04-01 | 2022-04-01 | Diallyl bisphenol A modified bismaleimide resin capable of prolonging shelf life and preparation method thereof |
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-
2022
- 2022-04-01 CN CN202210338068.5A patent/CN114561101A/en active Pending
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| CN102276836A (en) * | 2011-06-03 | 2011-12-14 | 苏州大学 | Flame retardant bimaleimide resin and preparation method thereof |
| CN102775605A (en) * | 2012-08-14 | 2012-11-14 | 西北工业大学 | Modified bismaleimide resin and preparation method thereof |
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