Given: Amorphous emulsion copolymer: 60 wt% methyl methacrylate Tg = 105 C 40 wt

Question

Given: Amorphous emulsion copolymer:

60 wt% methyl methacrylate Tg = 105 C

40 wt% ethyl acrylate Tg = -23 C

Proposed as basis of a latex paint formulation.

A latex consists of tiny polymer particles suspended in water.

These particles MUST coalesce to form a film upon evaporation of water when applying the paint.

a. Would the copolymer be suitable for an outdoor paint?

b. Actual paint formulation based on this copolymer contains some medium-volatility solvent dissolved in the latex particles.

This solvent is designed to evaporate over a period of a few hours after application of the paint.

What

Explanation / Answer

a) No

b) give hard homopolymers of having glass transistions of -54 c to -22 c

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