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Most foam is made from polyurethane.

They start by making polyurethane. To make it, you mix a polyol with a diisocyanate. There are many polyols. There are two important isocyanates, toluene diisocyanate and methylene diisocyanate. (Two other diisocyanates are used to make urethane paint.) The choice of polyol governs whether the foam is hard or soft, and how soft or hard it is.


Next, you mix in a blowing agent. The first blowing agent was water, which forms CO2 in contact with diisocyanate. They don't like making insulating foam with water, because the foam doesn't insulate as well.

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Maiya Legros

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Q: What is the method of manufacture?
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What is the break even quantityif the cost of manufacture is the same whichever method is used if A is a fixed cost of 40000 and a variable of 23 and b has a fixed cost of 52000?

There question is incomplete:There is no variable cost given for manufacturing method B. I'll assume it is b.It is unclear as to quantity for which the cost of manufacturing by both methods is the same. I'll assume it is the break-even quantity.The break even point is when the revenue from sales = cost of manufactureSo the question is asking for what quantity is the cost of manufacture using method A equal to the cost of manufacture using method B.cost of manufacture = fixed cost + variable cost × quantityMethod A: manufacturing cost = 40,000 + 23 × quantityMethod B: manufacturing cost = 52,000 + b × quantity→ 40,000 + 23 × quantity = 52,000 + b × quantity→ 23 × quantity - b × quantity = 52,000 - 40,000→ quantity(23 - b) = 12,000→ quantity = 12,000/(23 - b)I'll let you fill in the value of b; if b has no variable cost, b = 0.