Thermal Compound, calculating amount of hardener and resin by weight

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SUMMARY

This discussion focuses on calculating the correct proportions of hardener and resin for a thermal compound mixture, specifically using a ratio of 10.4 parts hardener to 100 parts resin. To achieve a final mixture weight of 2.75 pounds, the calculations confirm that 0.259 pounds of hardener and 2.491 pounds of resin are required. The percentages derived from the calculations are 9.42% hardener and 90.58% resin, ensuring the total weight is accurate. The method outlined provides a clear and effective approach to mixing these components by weight.

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  • Understanding of weight measurement and conversion
  • Basic knowledge of ratios and percentages
  • Familiarity with mixing compounds in a chemical context
  • Ability to perform basic algebraic calculations
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This discussion is beneficial for chemists, DIY enthusiasts, and anyone involved in the formulation of thermal compounds, particularly those looking to accurately mix components by weight for optimal performance.

2slowtogofast
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I have a simple question. If when mixing two liquids together the directions say mix 10.4 parts of hardner by weight for every 100 parts of resin and I want the final mixture to be 2.75lb, could I do the following?

Mh = mass of hardener
Mr = mass of resin

Mh + Mr = 2.75lb

Mh/Mr = 10.4/100 = .104

Then just solve from there to get the amount of each. I know this should be pretty straight forward but I just wantedto double check. Thanks in advance.
 
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This looks OK.

Chet
 
lay these things right out

I always like to lay these things right out as percentages:

You need 9.42% hardener, and need 90.58% resin.

10.4/(100+10.4) = 0.0942
100/(100+10.4) = 0.9058

Mh 0.0942 x 2.75 = 0.259
Mr 0.9058 x 2.75 = 2.491

check1: 0.259 + 2.491 = 2.75
check2: 0.259/2.75 = 0.0942 = 9.42%
 
Last edited:

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