A kind of preparation method of three-color solvent-free two-component polyurethane adhesive

Abstract

The invention relates to a three-primary-color two-component polyurethane adhesive and a preparation method thereof, belonging to the technical field of materials. The adhesive comprises a component A and a component B, wherein the component A comprises an active hydrogen-supplying ingredient and a filling material, the component B is 4,4-dicyclohexylmethane diisocyanate, and a mol ratio of the isocyanate radical in the component B to the active hydrogen ingredient in the component A is 1.8-2.5: 1. The three-primary-color polyurethane adhesive provided by the invention overcomes the problem of color matching of two-component polyurethane adhesives in the prior art, is applicable to bonding of colored sheet materials, profiled bar, films and the like, broadens the application scope of the polyurethane adhesive and has the advantages of simple color matching and a wide application scope.

Description

technical field

[0001] The invention belongs to the technical field of materials, and relates to a three-color two-component polyurethane adhesive and a preparation method thereof. Background technique

[0002] In the prior art, the composition of the two-component polyurethane adhesive includes component A and component B, component A is mainly polyol, filler, catalyst and sometimes there may be a chain extender component, component B is mainly polyisocyanate Components, when using, mix components A and B according to a certain ratio and then apply them on the surface of the adherend to perform bonding operations, and then apply a certain pressure to form a joint with high bonding strength, which meets the requirements Bonding requirements. Therefore, two-component polyurethane adhesive is a commonly used adhesive, which has the advantages of cheap price, controllable performance, convenient transportation and storage, and simple operation, so it is widely used in construc...

Examples

Embodiment 1

[0024] (1) Mix 100 grams of PPG1000, 150 grams of 500-mesh calcium bicarbonate (1.5 times the mass of the active hydrogen component) and 0.025 grams (0.01% of the mass of component A) of the blue base color pigment. After fully stirring, a light blue component A with a certain viscosity without obvious graininess is obtained;

[0025] (2) Then add 42 grams of hydrogenated MDI (the molar ratio of isocyanate to the active hydrogen component in the A component is 1.6:1), and stir well to prepare a light blue polyurethane adhesive, which can be It can be used to bond boards, sheets, profiled materials, films, etc. of the same color directly or after secondary deployment by color matching personnel.

Embodiment 2

[0027] (1) Mix 200 grams of PPG2000, 300 grams (1.5 times the mass of the active hydrogen component) of light calcium carbonate with a mesh size of 800 mesh, and 10 grams (2% of the mass of component A) of red-based color pigments at room temperature. Finally, a dark red component A with a certain viscosity without obvious graininess is obtained;

[0028] (2) Then add 50 grams of hydrogenated MDI (the molar ratio of isocyanate to the active hydrogen component in component A is 1.9:1), and stir well to obtain a dark red polyurethane adhesive, which can be directly Or it can be used to bond boards, sheets, profiled materials, films, etc. of the same color after secondary deployment by color matching personnel.

Embodiment 3

[0030] (1) Mix 200 grams of PPG4000, 300 grams (1.5 times the mass of the active hydrogen component) of light calcium carbonate with a mesh number of 1250 and 5 grams (1% of the mass of component A) of yellow-based color pigments, and fully After stirring, a yellow component A with a certain viscosity without obvious graininess is obtained;

[0031] (2) Then add 29 grams of hydrogenated MDI (the molar ratio of isocyanate to the active hydrogen component in the A component is 2.2:1), and stir well to obtain a yellow polyurethane adhesive, which can be directly or It can be used to bond boards, sheets, profiled materials, films, etc. of the same color after secondary deployment by color matching personnel.

technical field

[0001] The invention belongs to the technical field of materials, and relates to a three-color two-component polyurethane adhesive and a preparation method thereof. Background technique

[0002] In the prior art, the composition of the two-component polyurethane adhesive includes component A and component B, component A is mainly polyol, filler, catalyst and sometimes there may be a chain extender component, component B is mainly polyisocyanate Components, when using, mix components A and B according to a certain ratio and then apply them on the surface of the adherend to perform bonding operations, and then apply a certain pressure to form a joint with high bonding strength, which meets the requirements Bonding requirements. Therefore, two-component polyurethane adhesive is a commonly used adhesive, which has the advantages of cheap price, controllable performance, convenient transportation and storage, and simple operation, so it is widely used in construc...

Examples

Embodiment 1

[0024] (1) Mix 100 grams of PPG1000, 150 grams of 500-mesh calcium bicarbonate (1.5 times the mass of the active hydrogen component) and 0.025 grams (0.01% of the mass of component A) of the blue base color pigment. After fully stirring, a light blue component A with a certain viscosity without obvious graininess is obtained;

[0025] (2) Then add 42 grams of hydrogenated MDI (the molar ratio of isocyanate to the active hydrogen component in the A component is 1.6:1), and stir well to prepare a light blue polyurethane adhesive, which can be It can be used to bond boards, sheets, profiled materials, films, etc. of the same color directly or after secondary deployment by color matching personnel.

Embodiment 2

[0027] (1) Mix 200 grams of PPG2000, 300 grams (1.5 times the mass of the active hydrogen component) of light calcium carbonate with a mesh size of 800 mesh, and 10 grams (2% of the mass of component A) of red-based color pigments at room temperature. Finally, a dark red component A with a certain viscosity without obvious graininess is obtained;

[0028] (2) Then add 50 grams of hydrogenated MDI (the molar ratio of isocyanate to the active hydrogen component in component A is 1.9:1), and stir well to obtain a dark red polyurethane adhesive, which can be directly Or it can be used to bond boards, sheets, profiled materials, films, etc. of the same color after secondary deployment by color matching personnel.

Embodiment 3

[0030] (1) Mix 200 grams of PPG4000, 300 grams (1.5 times the mass of the active hydrogen component) of light calcium carbonate with a mesh number of 1250 and 5 grams (1% of the mass of component A) of yellow-based color pigments, and fully After stirring, a yellow component A with a certain viscosity without obvious graininess is obtained;

[0031] (2) Then add 29 grams of hydrogenated MDI (the molar ratio of isocyanate to the active hydrogen component in the A component is 2.2:1), and stir well to obtain a yellow polyurethane adhesive, which can be directly or It can be used to bond boards, sheets, profiled materials, films, etc. of the same color after secondary deployment by color matching personnel.