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What is mixed with calcium hydroxide on sand for CO2 cured polyacrylate?

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in Casting-Forming-Welding II by (119k points)
What is mixed with calcium hydroxide on sand for CO2 cured polyacrylate?

(a) Sodium polyacrylate

(b) Calcium polyacrylate

(c) Aluminium polyacrylate

(d) Iron polyacrylate

I had been asked this question during an interview.

My doubt stems from Gas-Vapour Cured Resin Binders in chapter Binder Technology of Casting-Forming-Welding II

1 Answer

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Right answer is (a) Sodium polyacrylate

Explanation: According to the reaction, sodium polyacrylate is mixed with calcium hydroxide (CaOH2) on sand and is later cured with carbon dioxide gas.

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