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Dual-component polyurethane adhesive with high elongation rate and preparation method thereof

A two-component polyurethane, high elongation technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as gap filling and sealing of parts that cannot meet high deformation

Active Publication Date: 2013-10-02
HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The two-component polyurethane adhesive has excellent performance and has good bonding performance to most materials, but the elongation of the two-component polyurethane adhesive is generally less than 700% after curing, which cannot meet the requirements of caulking and sealing at high-deformation parts. Require

Method used

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  • Dual-component polyurethane adhesive with high elongation rate and preparation method thereof
  • Dual-component polyurethane adhesive with high elongation rate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Component Raw material Proportion W t

[0025] A component

[0026] Polyester polyol (Mw=900~1100g / mol, hydroxyl value 150~170mgKOH / g) 12.2

[0027] Chain extender MDBA 2.0

[0028] Chain extender MOCA 7.3

[0029] Dioctyl phthalate 33.5

[0030] Calcium carbonate 33.5

[0031] Talc 11.0

[0032] γ-glycidyl etheroxypropyltrimethoxysilane 0.4

[0033] Dibutyltin dilaurate 0.1

[0034] B component

[0035] Polyether polyol (Mw=6000g / mol, hydroxyl value 26.5~29.5mgKOH / g) 41.9

[0036] Polyether polyol (Mw=4000g / mol, hydroxyl value 26.5~29.5mgKOH / g) 46.5

[0037] Diphenylmethane diisocyanate 11.6

[0038] Proportion: A:B=1:1 Wt

[0039] Performance Testing:

[0040] Tensile strength, elongation according to GB / T 528 Determination of tensile properties of vulcanized rubber and thermoplastic rubber

[0041] The test results are shown in Table 1.

Embodiment 2

[0043] Component Raw material Proportion Wt

[0044] A component

[0045] Polyester polyol (Mw=900~1100g / mol, hydroxyl value 150~170mgKOH / g) 12.2

[0046] Chain extender MDBA 4.0

[0047] Chain extender MOCA 5.3

[0048] Dioctyl phthalate 33.5

[0049] Calcium carbonate 33.5

[0050] Talc 11.0

[0051] γ-glycidyl etheroxypropyltrimethoxysilane 0.4

[0052] Dibutyltin dilaurate 0.05

[0053] Bis(2-dimethylaminoethyl)ether 0.05

[0054] B component

[0055] Polyether polyol (Mw=6000g / mol, hydroxyl value 26.5~29.5mgKOH / g) 41.9

[0056] Polyether polyol (Mw=4000g / mol, hydroxyl value 26.5~29.5mgKOH / g) 46.5

[0057]Diphenylmethane diisocyanate 11.6

[0058] Proportion: A:B=1:1 Wt

[0059] The performance test is the same as in Example 1.

[0060] The test results are shown in Table 1.

Embodiment 3

[0062] Component Raw material Proportion Wt

[0063] A component

[0064] Polyester polyol (Mw=900~1100g / mol, hydroxyl value 150~170mgKOH / g) 6.4

[0065] Polyether polyol (Mw=400g / mol, hydroxyl value 270~290mgKOH / g) 4.3

[0066] Chain extender MDBA 4.3

[0067] Diisodecyl phthalate 30.2

[0068] Calcium carbonate 46.6

[0069] Talc 7.6

[0070] γ-glycidyl etheroxypropyltrimethoxysilane 0.4

[0071] Stannous octoate 0.2

[0072] B component

[0073] Polyether polyol (Mw=6000g / mol, hydroxyl value 26.5~29.5mgKOH / g) 43.4

[0074] Polyether polyol (Mw=4000g / mol, hydroxyl value 26.5~29.5mgKOH / g) 48.2

[0075] Toluene diisocyanate 8.4

[0076] Proportion: A:B=1:1 Wt

[0077] The performance test is the same as in Example 1.

[0078] The test results are shown in Table 1.

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Abstract

The invention relates to a dual-component polyurethane adhesive with high elongation rate and a preparation method thereof, and belongs to the technical field of dual-component polyurethane adhesives. The invention mainly solves the problem that the elongation rate of a present dual-component polyurethane adhesive is generally less than 700% after solidification such that the adhesive can not satisfy joint filling and sealing requirements of highly deformed positions. The dual-component polyurethane adhesive with high elongation rate is mainly characterized by comprising two components A and B, wherein the component A contains, by weight, 5-25% of polyol, 2-10% of a chain extender, 15-35% of a plasticizer, 40-65% of a filing material, 0-3% of a coupling agent and 0.05-0.5% of a catalyst; and the component B contains, by weight, 80-95% of polyol and 5-20% of an isocyanate prepolymer. With the combination of the amino chain extender with an internal plasticization effect, polyol, the plasticizer and the like, the elongation rate of the adhesive after solidification can reach 1000%, its tensile strength can reach 1.5 MPa, and the adhesive is mainly used for bonding, joint filling and sealing of highly deformed positions.

Description

technical field [0001] The invention belongs to the technical field of two-component polyurethane adhesives, has high elongation after curing, and is applied to bonding, caulking and sealing of highly deformed parts. Background technique [0002] The two-component polyurethane adhesive has excellent performance and has good bonding performance to most materials, but the elongation of the two-component polyurethane adhesive is generally less than 700% after curing, which cannot meet the requirements of caulking and sealing at high-deformation parts. Require. [0003] The purpose of the present invention is to develop a high-elongation adhesive to solve the problem of the application of the two-component polyurethane adhesive to the caulking and sealing of high-deformation parts. Contents of the invention [0004] In the present invention, the amine-based chain extender with internal plasticizing function is used together with polyols, plasticizers, etc., so that the elonga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/04C09J175/08C09J175/06C09J175/14C08G18/69C08G18/66C08G18/32C09K3/10
Inventor 杨足明冯涛贾云龙周柳章锋
Owner HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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