Title:
METHOD FOR PREPARING HEAT-RESISTANT STRUCTURAL EPOXY ADHESIVE COMPOSITION HAVING IMPACT RESISTANCE AND STRUCTURAL EPOXY ADHESIVE COMPOSITION USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/204342
Kind Code:
A1
Abstract:
The present invention relates to an adhesive composition which realizes high adhesive strength and at the same time has properties of impact resistance and heat resistance and, more specifically, to a structural epoxy adhesive composition which exhibits both high adhesive strength and heat resistance due to a heat-resistant epoxy intermediate prepared according to the present invention, exhibits excellent impact resistance due to uniform dispersion of polymer particles in suitable heat-resistant epoxy monomers, and realizes high adhesive strength and fast curability through simultaneous introduction of monomers respectively having a vinyl group and a thiol group at ends thereof. Thus, the adhesive composition is useful for bonding of eco-friendly automobile parts and industrial parts. The structural epoxy adhesive composition having impact resistance according to the present invention comprises: (a) a first component comprising an epoxy-cyanate ester intermediate and core-shell rubber particles; (b) a second component comprising a flame retardant dispersed in a tetrafunctional epoxy monomer, and core-shell rubber particles; and (c) a third component comprising two types of monomers respectively having a vinyl group and a multifunctional thiol group at ends thereof. Also, a method for preparing a heat-resistant structural epoxy adhesive composition having impact resistance according to the present invention comprises: a first step for mixing, with core-shell rubber particles, an epoxy-cyanate ester intermediate prepared by heating liquid epoxy resin and cyanate ester at 80 °C for 30 minutes, followed by stirring at 100 °C for 3 hours and cooling to room temperature, to prepare a first component; a second step for mixing a tetrafunctional epoxy monomer with a flame retardant, stirring the mixture at 80 °C for 30 minutes, and then mixing the stirred mixture with core-shell rubber particles, followed by stirring at 80 °C for 30 minutes and slowly cooling to room temperature, to prepare a second component; a third step for preparing a third component comprising two types of monomers respectively having a vinyl group and a multifunctional thiol group at ends thereof; and a fourth step for mixing the first component and the second component at room temperature for 10 minutes, adding the third component and a curing accelerator thereto, mixing same while stirring for 30 minutes, and then slowly cooling the resultant mixture to room temperature.
Inventors:
CHOI YOUNG SUN (KR)
Application Number:
PCT/KR2020/001544
Publication Date:
October 08, 2020
Filing Date:
January 31, 2020
Export Citation:
Assignee:
NAT UNIV PUSAN IND UNIV COOP FOUND (KR)
International Classes:
C09J163/00; C08G59/17; C08G59/40; C08G59/42; C08G59/50; C08L21/00; C08L63/00; C09J11/06; C09J11/08
Foreign References:
| KR20120034080A | 2012-04-09 | |||
| JPH0421711B2 | 1992-04-13 | |||
| KR20160099609A | 2016-08-22 | |||
| KR20150098344A | 2015-08-28 | |||
| KR20150131015A | 2015-11-24 | |||
| KR101693605B1 | 2017-01-17 | |||
| KR970010919A | 1997-03-27 |
Other References:
See also references of EP 3929263A4
Attorney, Agent or Firm:
KIM, Jong Seok (KR)
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