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CN-121991604-A - Gutta-percha modified second-order reaction epoxy adhesive and preparation method thereof

CN121991604ACN 121991604 ACN121991604 ACN 121991604ACN-121991604-A

Abstract

The invention discloses a gutta-percha modified second-order reaction epoxy adhesive and a preparation method thereof, wherein the epoxy adhesive consists of a component A and a component B, the component A comprises epoxidized eucommia ulmoides gum, liquid epoxy resin, active diluent, auxiliary agent and the like, and the component B comprises cardanol modified phenolic aldehyde amine curing agent, modified polyamide curing agent, vegetable oleic acid, auxiliary agent and the like. The gutta-percha modified second-order reaction epoxy adhesive has the characteristics of second-order reaction characteristic, high flexibility, high bonding strength, environment friendliness, reproducibility and the like, and is suitable for waterproof bonding between steel, concrete base surfaces and asphalt pavement layers of roads, bridges and the like.

Inventors

  • PENG JIE
  • WU JIALI
  • LI YOUJI

Assignees

  • 吉首大学

Dates

Publication Date
20260508
Application Date
20260213

Claims (8)

  1. 1. The gutta-percha modified second-order reaction epoxy adhesive is characterized by comprising a component A and a component B; The component A comprises the following components in parts by weight: 20-45 parts of epoxidized gutta-percha; 20-50 parts of liquid epoxy resin; 10-40 parts of monofunctional reactive diluents; 10-40 parts of difunctional reactive diluent; 0.5-2 parts of a coupling agent; 0.1-1 part of thixotropic agent; 0.05-0.5 part of defoaming agent; The component B comprises the following components in parts by weight: 10-30 parts of cardanol modified phenolic amine curing agent; 10-30 parts of modified polyamide curing agent; 40-80 parts of vegetable oleic acid; 0.5-3 parts of anhydrous citric acid; 0.5-4 parts of 2-ethyl-4-methylimidazole; The epoxy value of the epoxidized gutta-percha is 0.7-2.1 mmol/g, and the preparation process comprises the following steps: S1, adding gutta-percha into a mixed solvent, and heating to 70 ℃ under stirring until the gutta-percha is completely dissolved; S2, introducing nitrogen, slowly dropwise adding a mixed solution of tetraalkylammonium molybdate and tert-butyl hydroperoxide, and stopping the reaction after the epoxy value reaches the requirement; S3, cooling to room temperature, adding sodium sulfite aqueous solution, stirring for 30min, then adding ethanol, continuously stirring for 10min, and filtering, washing and drying to obtain the epoxidized gutta-percha; the mass ratio of the component A to the component B is 100:60-100.
  2. 2. The gutta percha modified second-order reaction epoxy adhesive according to claim 1, wherein in the step S1, the gutta percha is gutta percha with the content of natural gutta percha being more than or equal to 98%; the mixed solvent is a mixed solvent with the volume ratio of toluene to petroleum ether being 1:1.
  3. 3. The gutta percha modified second-order reaction epoxy adhesive according to claim 1, wherein in the step S2, the dosage of the tetraalkylammonium molybdate is 0.05-0.50% of the mass of the gutta percha; The dosage of the tertiary butyl hydroperoxide is 5-25% of the mass of the gutta-percha.
  4. 4. The gutta percha modified second order reaction epoxy adhesive according to claim 1, wherein the liquid epoxy resin is liquid bisphenol a type epoxy resin with an epoxy value of 4.2-5.3 mmol/g; The monofunctional reactive diluent is one of C eight-dodecyl glycidyl ether, C twelve-tetradecyl glycidyl ether, C twelve-tridecyl glycidyl ether and C twelve-dodecyl glycidyl ether; the difunctional reactive diluent is one of neopentyl glycol diglycidyl ether and 1, 6-hexanediol diglycidyl ether.
  5. 5. The gutta percha modified second order reactive epoxy adhesive according to claim 1, wherein said coupling agent is KH560; The thixotropic agent is winning white carbon black AEROSIL A200; The defoamer is Anjeka-5680A of Anji-C technology Co., ltd.
  6. 6. The gutta percha-modified second order reactive epoxy adhesive according to claim 1, wherein said vegetable oleic acid is one of myristic acid, palmitic acid, palmitoleic acid, eleostearic acid, ricinoleic acid.
  7. 7. The gutta percha modified second order reactive epoxy adhesive according to claim 1, wherein the cardanol modified phenolic amine curing agent is cardanol modified phenolic amine curing agent XY-3209 of Shanghai new material science and technology company; the modified polyamide curing agent is modified polyamide curing agent TY5324 of Jining Dide chemical Co.
  8. 8. The method for preparing the gutta percha modified second order reaction epoxy adhesive as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps: S1, adding the epoxidized gutta-percha into a monofunctional reactive diluent and a difunctional reactive diluent, heating to 70 ℃ while stirring, adding liquid epoxy resin, a defoaming agent and a coupling agent after the epoxidized gutta-percha is completely dissolved, dispersing at a high speed for 1-2 min, adding a thixotropic agent, and dispersing at a high speed for 3-5 min to obtain a component A; S2, adding anhydrous citric acid into the cardanol modified phenolic amine curing agent and the modified polyamide curing agent, heating to 70 ℃ while stirring, cooling to room temperature after the anhydrous citric acid is completely dissolved, and then adding vegetable oleic acid and 2-ethyl-4-methylimidazole, and dispersing at a high speed for 1-2 minutes to obtain a component B; s3, independently sealing and packaging the component A and the component B, and uniformly mixing according to a proportion when in use.

Description

Gutta-percha modified second-order reaction epoxy adhesive and preparation method thereof Technical Field The invention belongs to the technical field of biological-based adhesive materials and application thereof, and particularly relates to a gutta-percha modified second-order reaction epoxy adhesive and a preparation method thereof. Background The epoxy adhesive is widely applied to waterproof bonding between steel, concrete base surfaces and asphalt pavement layers in road and bridge pavement engineering due to excellent mechanical property and chemical stability, and is a key functional material for realizing the integrity of pavement structures and long-term service performance. Although epoxy adhesive systems cured in stages have been developed at present, the gradual formation of strength in different temperature ranges can be realized, and the requirements of field construction technology can be met, the problems of overhigh strength and insufficient flexibility after curing still exist, and the problems of easy stress concentration and interfacial peeling or pavement cracking are caused under the coupling action of alternating temperature and dynamic load. In addition, the traditional epoxy adhesive is mostly dependent on petroleum-based raw materials, and in the environment-friendly low-carbon development background, the sustainability and the environmental friendliness of the traditional epoxy adhesive are in need of improvement. Disclosure of Invention In view of the defects existing at present, the invention provides the gutta-percha modified second-order reaction epoxy adhesive and the preparation method thereof, and the epoxy adhesive has the characteristics of second-order reaction characteristic, high flexibility, high adhesive strength, environment friendliness, reproducibility and the like, and is suitable for waterproof bonding between steel, concrete basal planes and asphalt pavement layers of roads, bridges and the like. In order to achieve the technical purpose, the invention adopts the following technical scheme: the gutta-percha modified second-order reaction epoxy adhesive comprises a component A and a component B: The component A comprises the following components in parts by weight: 20-45 parts of epoxidized gutta-percha; 20-50 parts of liquid epoxy resin; 10-40 parts of monofunctional reactive diluents; 10-40 parts of difunctional reactive diluent; 0.5-2 parts of a coupling agent; 0.1-1 part of thixotropic agent; 0.05-0.5 part of defoaming agent; The component B comprises the following components in parts by weight: 10-30 parts of cardanol modified phenolic amine curing agent; 10-30 parts of modified polyamide curing agent; 40-80 parts of vegetable oleic acid; 0.5-3 parts of anhydrous citric acid; 0.5-4 parts of 2-ethyl-4-methylimidazole; The epoxy value of the epoxidized gutta-percha is 0.7-2.1 mmol/g, and the preparation process comprises the following steps: S1, adding gutta-percha into a mixed solvent, and heating to 70 ℃ under stirring until the gutta-percha is completely dissolved; S2, introducing nitrogen, slowly dropwise adding a mixed solution of tetraalkylammonium molybdate and tert-butyl hydroperoxide, and stopping the reaction after the epoxy value reaches the requirement; S3, cooling to room temperature, adding sodium sulfite aqueous solution, stirring for 30min, then adding ethanol, continuously stirring for 10min, and filtering, washing and drying to obtain the epoxidized gutta-percha; the mass ratio of the component A to the component B is 100:60-100. According to one aspect of the present invention, in step S1, the gutta-percha is gutta-percha with a natural gutta-percha content of not less than 98%, and is available from Shaanxi Muwa Biotech Co. According to one aspect of the present invention, in step S1, the mixed solvent is a mixed solvent of toluene and petroleum ether in a volume ratio of 1:1. According to one aspect of the invention, the amount of the tetraalkylammonium molybdate in the step S2 is 0.05 to 0.50 percent of the mass of the gutta percha. According to one aspect of the invention, the amount of the tertiary butyl hydroperoxide in the step S2 is 5-25% of the mass of the gutta percha. According to one aspect of the invention, the liquid epoxy resin is a liquid bisphenol A type epoxy resin with an epoxy value of 4.2-5.3 mmol/g, such as E51 epoxy resin of Baling division of petrochemical industry in China. According to one aspect of the invention, the monofunctional reactive diluent is one of a c eight to a deca alkyl glycidyl ether, a c twelve to a tetradecyl glycidyl ether, a c twelve to a tridecyl glycidyl ether, a c dodecyl glycidyl ether. According to one aspect of the invention, the difunctional reactive diluent is one of neopentyl glycol diglycidyl ether, 1, 6-hexanediol diglycidyl ether. According to one aspect of the invention, the vegetable oil acid is one of myristic acid, palmitic acid, palmitoleic acid, eleostearic acid, ricinoleic ac