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Polyurethane glue for being compounded with powder

A technology of polyurethane glue and powder is applied in the field of polyurethane to achieve the effects of adjustable hardness and softness, large addition amount and low cost

Inactive Publication Date: 2017-05-24
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the glues used in products compounded with powder, such as heat conduction sheets and wave-absorbing sheets, are mainly silica gel, epoxy resin, acrylic resin, etc. There is no report on the compounded products of polyurethane glue and functional powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In parts by mass, 1 part of MDI trimer, 9 parts of binary polyether alcohol PPG-8000, 20 parts of ternary polyether alcohol PPG3600, 6 parts of alumina powder, 0.1 part of catalyst diethylenetriamine, antioxidant sub 1 part of diphenyl isodecanoate phosphate, mixed evenly and evacuated to prepare a slurry. The slurry is pressed into a sheet with a thickness of 1-10 mm, and cured at 70° C. for 1 hour to obtain a heat conducting sheet.

[0025] The obtained heat conduction sheet has a Shore hardness of 32HA, a thermal conductivity of 2.21W, and a density of 2.72g / cm 3 .

Embodiment 2

[0027] In parts by mass, 1 part of HDI trimer, 5 parts of binary polyether alcohol PPG-6000, 20 parts of ternary polyether alcohol PPG3600, 8 parts of alumina powder, 0.1 part of catalyst diethylenetriamine, antioxidant sub 0.1 part of diphenyl isodecanoate phosphate, mixed evenly and evacuated to prepare a slurry. Press the slurry into a sheet with a thickness of 1-10mm, and cure at 70°C for 1 hour.

[0028] The Shore hardness of the obtained heat conduction sheet was 23HA, and the thermal conductivity was 3.0W, so that the heat conduction sheet was obtained.

[0029] After the formulations described in Examples 1-2 are solidified without adding powder, the hardness can be adjusted in a wide range from 20HA to 100HA, and the rebound performance is better, with the rebound rate reaching over 90%. The glue system has a certain viscosity, and the viscosity changes with the viscosity (molecular weight) of each component; the mutual solubility between the components is good, and ...

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PUM

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Abstract

The invention relates to polyurethane glue for being compounded with powder. The polyurethane glue comprises, by mass parts, 1 part of polyisocyanate, 3-15 parts of polyether diol, 10-30 parts of polyether triol, 0.01-0.5 part of catalyst and 0.1-5 parts of antioxidant. The polyurethane glue is low in cost and long in setting time; after being solidified, a glue body is adjustable in hardness and good in resilience, the polyurethane glue is compounded with powder such as aluminum oxide and magnetic powder, the added amount of functional powder is large, and the polyurethane glue is suitable for industrial production of powder composite type products.

Description

technical field [0001] The invention belongs to the field of polyurethane, in particular to a polyurethane glue used for compounding with powder. Background technique [0002] Polyurethane glue is a kind of glue containing urethane group and isocyanate group in the molecular chain. Because it contains strong polar isocyanate and urethane group, it has high reactivity and can be cured at room temperature. Therefore, it is suitable for metal, rubber, glass, etc. , ceramics, plastics, wood, fabrics, leather and many other materials have excellent adhesive properties. [0003] At present, the glues used in products compounded with powder, such as thermal conductive sheets and wave-absorbing sheets, are mainly silica gel, epoxy resin, acrylic resin, etc. There is no report on the compounded products of polyurethane glue and functional powder. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a polyurethane glue for com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/04C09J11/06C08G18/79C08G18/48C08K3/22C08K5/526
CPCC09J175/08C08G18/4812C08G18/792C08K3/22C08K5/526C08K2003/2227C09J11/04C09J11/06
Inventor 游正伟王少飞
Owner DONGHUA UNIV