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Spray type solvent-free polyurethane adhesive and preparation method thereof

A solvent-free polyurethane and adhesive technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of long open time, inability to achieve large-scale industrial production, and adhesive penetration, etc. Keep the effect of opening hours

Active Publication Date: 2017-03-15
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For adhesives, because many of the surfaces to be bonded are loose and porous, when the viscosity of the adhesive is low, the adhesive will penetrate. At the same time, due to the long opening time, large-scale industrial production cannot be realized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Preparation of component A:

[0018] Weigh 20Kg of dipropylene glycol in the reactor, the liquid is heated to 110 ℃, under the condition of vacuuming, dehydration 30 minutes, then return to atmospheric pressure, and reduce the temperature to 70 ℃, add 80KgMDI-50 ( Yantai Wanhua production), continue to stir for 3 hours, cool to room temperature, then add 100Kg of PM-200 (Yantai Wanhua production) to it, stir for 15 minutes to obtain component A.

[0019] (2) Preparation of component B:

[0020] Weigh out 45Kg of ordinary polyether polyol SC-455 (hydroxyl value: 455mgKOH / g, produced by Guodu Chemical), 10Kg of epoxy soybean oil polyether polyol (hydroxyl value: 310mgKOH / g), and polyetheramine D400 (Huntsman). Production) 20Kg, polyetheramine T-403 (manufactured by Huntsman) 15Kg, silane coupling agent KH550 5Kg, defoamer 3Kg, in the reaction kettle, continue to stir for 15 minutes to obtain B component.

[0021] The A / B component is sprayed on the surface of the wo...

Embodiment 2

[0023] (1) Preparation of component A:

[0024] Weigh 50Kg of 1,4-butanediol in the reactor, heat the liquid to 110°C, dehydrate it for 30 minutes under vacuum, then return to atmospheric pressure, lower the temperature to 70°C, add 100KgMDI to it -50 (manufactured by Yantai Wanhua), continue to stir for 3 hours, cool to room temperature, then add 70Kg of M20S (manufactured by BASF) to it and stir for 15 minutes to obtain component A.

[0025] (2) Preparation of component B:

[0026] Weigh out 40Kg of ordinary polyether polyol SC-400 (hydroxyl value: 400mgKOH / g, produced by Guodu Chemical), 35Kg of epoxy soybean oil polyether polyol (hydroxyl value: 310mgKOH / g), and polyetheramine T-403 (Henry Simai production) 17Kg, silane coupling agent KH550 5Kg, defoaming agent 3Kg, in the reaction kettle, continue to stir for 15 minutes to obtain B component.

[0027] Use a polyurethane sprayer (Graco E-10) to spray components A / B on the PVC surface at a spraying temperature of 45°C to ...

Embodiment 3

[0029] (1) Preparation of component A:

[0030] Weigh 30Kg of ethylene glycol in the reactor, the liquid is heated to 110 ° C, under the condition of vacuuming, dehydrated for 30 minutes, then returned to atmospheric pressure, and reduced the temperature to 70 ° C, to which 80Kg liquefied MDI (Yantai) was added. Wanhua production), continue to stir for 3 hours, cool to room temperature, then add 50Kg of M20S (BASF production) to it, stir for 15 minutes to obtain component A.

[0031] (2) Preparation of component B:

[0032] Weigh the common polyether polyol SA-380 (hydroxyl value: 380mgKOH / g, produced by Shandong Dongda) 30Kg, epoxy soybean oil polyether polyol (hydroxyl value 310mgKOH / g) 45Kg, polyetheramine D-400 ( Huntsman production) 15Kg, silane coupling agent KH570 5Kg, defoamer 5Kg, in the reaction kettle, continue to stir for 15 minutes to obtain B component.

[0033] The A / B component was sprayed on the surface of the PU honeycomb panel by using a polyurethane spray...

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PUM

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Abstract

The invention discloses a spray type solvent-free polyurethane adhesive. The spray type solvent-free polyurethane adhesive includes an A component and a B component, wherein the A component includes an isocyanate-group-containing prepolymer, the B component includes polyether polyol and polyamine, before the A component and the B component are mixed, the viscosity of the A component and the viscosity of the B component are both less than 1000 cps (25 DEG C), the adhesive is applicable to an ordinary polyurethane or polyurea spraying machine, and after being mixed, the component A and the B component are able to react quickly at 20-100 DEG C to rapid form the polyurethane adhesive with a certain initial adhesion force within 3-10 seconds. The polyurethane adhesive is convenient to use, no solvent is required for dilution, bonding is firm, and the adhesive is widely applied in base materials and has low cost.

Description

technical field [0001] The invention relates to a spray-type solvent-free polyurethane adhesive and a preparation method thereof, belonging to the field of polymer adhesives. Background technique [0002] Polyurethane adhesive is a medium and high-grade adhesive with excellent flexibility, impact resistance, chemical resistance and abrasion resistance. The multi-type polyurethane adhesives are widely used in a wide range of applications, including: woodworking industry, packaging industry, construction and paving, etc. [0003] The production methods of polyurethane adhesive include solution method and solid resin dissolution method. The adhesive contains a large amount of solvent. When the solvent evaporates, the adhesive material is uniformly coated on the surface to be bonded to play the role of the adhesive. Commonly used solvents include: toluene, benzene, acetone, ethyl acetate and other organic solvents, which not only pollute the environment after volatilization, bu...

Claims

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Application Information

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IPC IPC(8): C09J175/08C08G18/66C08G18/50C08G18/48C08G18/32
CPCC08G18/4804C08G18/4891C08G18/5024C08G18/6674C09J175/08
Inventor 陈雅君李琳珊钱立军
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY