Hydrolysis-resistant double-component polyurethane adhesive for structure adhesion
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A two-component polyurethane and adhesive technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as poor hydrolysis resistance, and achieve good hydrolysis resistance, high bonding strength, The effect of high bond strength
Active Publication Date: 2012-07-11
TONSAN ADHESIVES INC
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However, because the ester group is easily hydrolyzed, the hydrolys
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Embodiment 1
[0041] A component:
[0042] Polyisocyanate 40.0 parts
[0043] Dibutyl phthalate 10.5 parts
[0044] Calcium carbonate 48.5 parts
[0045] 0.5 parts of p-toluenesulfonyl isocyanate
[0046] Fumed silica 0.5 parts
[0047] B component:
[0048] Polycaprolactone polyol 20 parts
[0049] Castor oil 38 parts
[0050] Polyoxypropylene triol 16 parts
[0051] Titanium dioxide 4 parts
[0052] Calcium carbonate 11.5 parts
[0053] Calcium Oxide 4 parts
[0054] Fumed silica 4.5 parts
[0055] γ-Aminopropyltrimethoxysilane 1.5 parts
[0056] 1.4-butanediol 0.4 parts
[0057] Dibutyltin dilaurate 0.1 parts
[0058] A, B two components according to the mass ratio of 1.5:1 after static mixing test performance.
Embodiment 2
[0060] A component:
[0061] Polyisocyanate 35.0 parts
[0062] Dibutyl phthalate 15.5 parts
[0063] Calcium carbonate 48.5 parts
[0064] 0.5 parts of p-toluenesulfonyl isocyanate
[0065] Fumed silica 0.5 parts
[0066] B component:
[0067] Phthalic anhydride polyester polyol 30 parts
[0068] 20 parts castor oil
[0069] Polyoxypropylene glycol 5 parts
[0070] Polyoxyethylene triol 20 parts
[0071] Titanium dioxide 4 parts
[0072] Calcium carbonate 10 parts
[0073] Calcium Oxide 5 parts
[0074] Fumed silica 4 parts
[0075] γ-glycidyl etheroxypropyl trimethoxysilane 1.6 parts
[0076] MOCA 0.3 copies
[0077] Dibutyltin dilaurate 0.1 parts
[0078] Statically mix the two components A and B according to the mass ratio of 2:1 to test the performance.
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Abstract
The invention relates to a hydrolysis-resistant double-component polyurethane adhesive for structure adhesion. The hydrolysis-resistant double-component polyurethane adhesive for structure adhesion consists of a component A and a component B, wherein the component A comprises the following components in part by weight: 30 to 70 parts of polyisocyanate resin, 5 to 20 parts of plasticizing agent, 0.25 to 5 parts of thixotropic agent, 10 to 50 parts of incremental filler and 0.25 to 1 part of water-removing agent; and the component B comprises the following components in part by weight: 5 to 30 parts of polyester polyol, 5 to 30 parts of vegetable oil polyol, 5 to 30 parts of polyether polyol, 3 to 15 parts of water-absorbing filler, 1 to 10 parts of thixotropic agent, 3 to 15 parts of incremental filler, 0.1 to 10 parts of pigment, 0.1 to 5 parts of adhesion force accelerator, 0.1 to 2 parts of chain extender and 0.01 to 0.2 part of catalyst. An adhesion system improves adhesion property, solves the problem that a thermosetting composite material is subjected to surface roughening treatment before adhesion and improves the using efficiency. Aiming at the problem of poor hydrolysis resistance of a polyester type polyurethane adhesive system, the hydrolysis resistance is improved through molecule design of polyurethane soft and hard sections.
Description
technical field [0001] The present invention relates to structural adhesives, in particular to two-component adhesives based on polyisocyanate and polyols. . Background technique [0002] Structural adhesives refer to adhesives that are used in the bonding of stressed structural parts, can withstand large dynamic loads and static loads, and can be used for a long time. In layman's terms, structural adhesives are used to replace bolts, rivets or welding to join structural components such as metal, plastic, glass, and wood. They are adhesives that can withstand large loads for a long time and still have reliable performance. [0003] Epoxy resin and acrylate adhesives were first known as structural adhesives, but the commonly used acrylate adhesives have a strong odor and are irritating to the respiratory tract. The curing system of epoxy adhesives is highly toxic, and the toughness of these two structural adhesives is poor. , with the enhancement of people's awareness of en...
Claims
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