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General Discussion / Klear
« on: September 16, 2016, 10:42:42 AM »
I have been trying to sort out files on my computer and came across this.
It may be of interest to you.
I must have written it way back in time.
Klear
Made by Johnson, called Future in USA, it may be going out of production soon.
It is described as an acrylic polymer that contains phosphates, polycarboxylates and other substances.
Many uses other besides that as a floor cleaner – modelling, covering scratches in cd’s apparently. Also for cement/concrete mixing and in nappies, water softening.
Can be removed by using a solution of dilute ammonia (they mean a dilute solution of ammonium hydroxide).
Polycarboxylates are high molecular weight (they mean mass) polymers that now have replaced polyphosphates. It does biodegrade but this depends on the polymer size and it is non toxic to aquatic organisms, unlike phospates.
They also have a low toxicity generally.
As the molecular mass decreases the solubility increases.
Described as an Anionic polymer with a carbon chain backbone that contains carboxyl groups (COOH), sometimes as the sodium salt. It is usually a co-polymer, this means that it is made up of two different molecules that are joined together in long chains, there is little mention of linkage between the chains, but there probably will be as the COOH groups may hydrogen bond, but as I have forgotten most organic chemistry I cannot be sure. It would seem that some of the sodium ones have super cross linking and so will be particularly tough.
The usual co-polymers are
1. acrylic acid (prop-2-enoic acid) and maleic anhydride
2. acrylic acid and methacrylic acid (Perspex is polymethylmethacrylate)
It may also be a homo-polymer of acrylic acid (3)
So 1 would be a never ending chain of
-(CH2-CHCOOH)x-(COONa-COONa)y-
2 -(CH2-COONa)x-(CH2-CHCOOH(Na))y -
3 -(CH2-CHCOOH(Na))x-
It may be of interest to you.
I must have written it way back in time.
Klear
Made by Johnson, called Future in USA, it may be going out of production soon.
It is described as an acrylic polymer that contains phosphates, polycarboxylates and other substances.
Many uses other besides that as a floor cleaner – modelling, covering scratches in cd’s apparently. Also for cement/concrete mixing and in nappies, water softening.
Can be removed by using a solution of dilute ammonia (they mean a dilute solution of ammonium hydroxide).
Polycarboxylates are high molecular weight (they mean mass) polymers that now have replaced polyphosphates. It does biodegrade but this depends on the polymer size and it is non toxic to aquatic organisms, unlike phospates.
They also have a low toxicity generally.
As the molecular mass decreases the solubility increases.
Described as an Anionic polymer with a carbon chain backbone that contains carboxyl groups (COOH), sometimes as the sodium salt. It is usually a co-polymer, this means that it is made up of two different molecules that are joined together in long chains, there is little mention of linkage between the chains, but there probably will be as the COOH groups may hydrogen bond, but as I have forgotten most organic chemistry I cannot be sure. It would seem that some of the sodium ones have super cross linking and so will be particularly tough.
The usual co-polymers are
1. acrylic acid (prop-2-enoic acid) and maleic anhydride
2. acrylic acid and methacrylic acid (Perspex is polymethylmethacrylate)
It may also be a homo-polymer of acrylic acid (3)
So 1 would be a never ending chain of
-(CH2-CHCOOH)x-(COONa-COONa)y-
2 -(CH2-COONa)x-(CH2-CHCOOH(Na))y -
3 -(CH2-CHCOOH(Na))x-