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Polyurethane sealing glue

A technology of polyurethane sealant and polyurethane prepolymer, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of residual volatile solvent, insufficient solid content, etc., and reach the adjustable range of performance Wide, high mechanical strength, good elasticity

Active Publication Date: 2009-12-30
NANTONG YANYI COATING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the existing polyurethane sealants often have residual volatile solvents and insufficient solid content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1. A kind of polyurethane sealant

[0036] A component is as follows (Kg): MDI prepolymer 10

[0037] The formula of component B is as follows (Kg):

[0038] Polyether polyol 23;

[0039] Phthalates 15;

[0040] CaCO 3 60;

[0041] Dibutyltin dilaurate 1;

[0042] Hydrogenated castor oil 1.

[0043] Disperse and defoam the above raw materials.

Embodiment 2

[0044] Embodiment 2. A kind of polyurethane sealant

[0045] A component is as follows (Kg): Terminated alkoxy silyl polyurethane prepolymer 20;

[0046] The formula of component B is as follows (Kg):

[0047] Polytetrahydrofuran 18

[0048] Diol Benzoate 10

[0049] Talc 54

[0050] Stannous octoate 0.15

[0051] Polyamide 0.9

[0052] Disperse and defoam the above raw materials.

Embodiment 3

[0053] Embodiment 3. A kind of polyurethane sealant

[0054] Component A is as follows (Kg): polyisocyanate 60 composed of 60% MDI prepolymer and 40% HDI prepolymer;

[0055] The formula of component B is as follows (Kg):

[0056] Polytetrahydrofuran 30

[0057] Diol Benzoate 10

[0058] Talc 54

[0059] Stannous octoate 2

[0060] Polyamide 0.1

[0061] Disperse and defoam the above raw materials.

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PUM

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to polyurethane sealing glue. The polyurethane sealing glue is characterized in that the polyurethane sealing glue consists of component A and component B, and the ratio of the component A to the component B in portion by weight is 1:1-10, wherein the component A is polyurethane prepolymer; and the component B comprises the following compositions in portion by weight: 16 to 30 portions of polyether polyol, 2 to 15 portions of plasticizer, 40 to 70 portions of filler, 0.1 to 2 portions of catalyst, and 0.1 to 2 portions of thixotropic agent. The polyurethane sealing glue has the advantages of good abrasion resistance, low-temperature flexibility, wide performance adjustable range, large mechanical strength, good adhesive property, good elasticity, good rebound resilience, good weather resisting property, good oil resistivity and biological ageing resistance, is suitable for dynamic joint, and does not contain volatile solvent and other small molecular substances; the service life of the polyurethane sealing glue can reach 15 to 20 years; and the solid content of the polyurethane sealing glue is 100 percent.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a polyurethane sealant. Background technique [0002] Sealants are materials used to fill voids (holes, joints, seams, etc.). Amorphous sealants are the main body of sealing materials, including silicone (including modified silicone), polyurethane, polysulfide rubber, acrylic ester, SBR rubber, butyl rubber, asphalt, oily caulk Classes, etc., the earliest used sealants are asphalt, oil-based caulk and so on. Elastic sealant must be used to fill gaps that are stretchable due to vibration or thermal expansion and contraction. For more than 30 years, elastic sealants have been used more and more widely in many industrial and civil fields such as construction, civil engineering, automobiles, ships, and electrical communications. Among them, the demand for construction sealants is the largest. Elastic sealant is a product that combines two functions of bondin...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09K3/10
Inventor 杨生凤缪德忠葛镇瑞冯金海
Owner NANTONG YANYI COATING TECH
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