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Adhesive composition

A composition and adhesive technology, applied in the direction of adhesives, adhesive types, other rubber adhesives, etc., can solve the problems of reduced bonding strength, insufficient improvement of bonding strength, cold/heat cycle resistance, etc. Excellent adhesion durability, excellent curability, and good storage stability

Active Publication Date: 2016-05-11
TOAGOSEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, in the modification method described in the above-mentioned Patent Document 1, although flexibility can be imparted to the adhesive, there is still the following problem: especially when the adhesive is applied between different types of adherends, The cold / heat cycle resistance of the adhesive strength cannot be sufficiently improved, and the adhesive strength decreases over time due to the exudation of the plasticizer from the cured product

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0115] Although this invention is demonstrated more concretely based on an Example, this invention is not limited to this. In addition, in the following, parts and % are based on mass unless otherwise specified.

[0116] 1. Evaluation method

[0117] (1) Molecular weight

[0118] Device: Alliance2695 (manufactured by WATERS Corporation)

[0119] Column: 2 TSKgelSuperMultiporeHZ-H and 2 TSKgelSuperHZ-2500 connected in series (manufactured by Tosoh Corporation)

[0120] Column temperature: 40°C

[0121] Mobile phase: tetrahydrofuran 0.35ml / min

[0122] Detector: RI

[0123] The molecular weight measured by GPC was converted based on the molecular weight of polystyrene.

[0124] (2) Bonding speed

[0125] The adhesion speed was measured in the environment of 23 degreeC and 60 %RH based on JISK6861 "the test method of the alpha-cyanoacrylate adhesive agent." The test pieces used for the measurement are as follows.

[0126] ・ABS: ABS resin manufactured by UMGABS Co., Ltd.,...

Synthetic example 1

[0138] Synthesis example 1 (methyl tri-n-octyl ammonium trifluoromethanesulfonate)

[0139] In a 50ml eggplant type bottle, 4.041g (10.00mmol) of methyl tri-n-octylammonium chloride (reagent) and 13.2g (20mg chemical equivalent), and toluene 25ml, stirred at room temperature for 48 hours. After removing the ion exchange resin by filtration, 1.501 g (10.00 mmol) of trifluoromethanesulfonic acid was added dropwise to the obtained product under ice cooling. The ice bath was removed and stirring was continued for another 12 hours at room temperature. The reactant was washed three times with 25 ml of ion-exchanged water, and the resulting product was dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The resulting residue was dissolved in 25 ml of methanol, and insoluble matter was removed by filtration. The solvent was distilled off under reduced pressure to obtain 5.022 g of light yellow semi-solid ( salt A).

[0140] 3. Manufacture of adhesi...

Embodiment 1

[0142] 20 ppm of sulfur dioxide, 1000 ppm of hydroquinone, and methanesulfonic acid (manufactured by Kishida Chemical Co., Ltd., pKa=-0.6 [25°C]) 0.005 parts. After dissolving 20 parts of the elastomer shown in Table 1 (ethylene / methyl acrylate copolymer, manufactured by DuPont, trade name "VamacG"), the amount shown in Table 1 was mixed with vinyl methoxy Silane (manufactured by Momentive Performance Materials Inc., trade name "A-171") 1.5 parts by mass of a polymer having a hydrolyzable silyl group (manufactured by Kaneka, trade name "SilylSAT200"), at a temperature of 15 to 30°C The mixture was stirred for 10 minutes to prepare an adhesive composition. The obtained adhesive composition was subjected to the above evaluation. The results are shown in Table 2.

[0143]

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Abstract

This invention provides an adhesive composition that is pliable and exhibits excellent adhesion durability. Said adhesive composition is characterized by containing (a) 100 mass parts of a 2-cyanoacrylate ester, (b) 5-200 mass parts of a polymer that has a hydrolyzable silyl group, (c) 5-50 mass parts of an elastomer, and (d) 0.0005-0.5 mass parts of an acid catalyst. Said adhesive composition preferably also contains (e) 0.001-5 mass parts of an onium salt.

Description

technical field [0001] The present invention relates to adhesive compositions. More specifically, the present invention relates to an adhesive composition containing 2-cyanoacrylate, and the obtained cured product not only has flexibility but also exhibits excellent adhesion durability. Background technique [0002] The adhesive composition containing 2-cyanoacrylate, due to the specific anionic polymerizability of 2-cyanoacrylate as the main component, is weak on the surface of the adherend with very little moisture, etc. Polymerization is initiated in the presence of anions, and various materials can be joined strongly in a short time. Therefore, it can be used as a so-called instant adhesive in a wide range of fields such as industrial use, medical use, and household use. However, since the cured product of this adhesive composition is hard and brittle, on the opposite side of having excellent shear adhesive strength, there are low peel adhesive strength and impact adhe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/04C09J11/02C09J121/00C09J201/10
CPCC09J121/00C09J133/14C09J4/06C09J143/00C09J143/04C08L21/00C08L33/14C08F222/322C08F210/02C08F220/14C09J11/06C09J201/10C09J133/22
Inventor 石崎谦一安藤裕史
Owner TOAGOSEI CO LTD
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