Home Cosmetic Science Talk Formulating General Is sodium silicate better than STPP in laundry detergent according to this chart

  • Is sodium silicate better than STPP in laundry detergent according to this chart

    Posted by Abdullah on February 6, 2023 at 9:50 pm

    According to this chart, sodium silicate is better than STPP in everything they do in a detergent . Is this correct?

    If it is correct, is it necessary to add stpp in liquid or powder laundry detergent if it already has sodium silicate?

    Abdullah replied 1 year ago 3 Members · 10 Replies
  • 10 Replies
  • Abdullah

    Member
    February 6, 2023 at 9:51 pm
  • ketchito

    Member
    February 7, 2023 at 11:23 am

    Is that chart from a supplier? I’d search for a more independent sourse. STPP outperforms silicates in many of those attributes, and that’s why it was the most used water-softner ingredient, which also gave antirredeposition properties, soil suspension, anti-incrustation and alkalinity source to formulas. You can find that info in SEPAWA congresses and from CRC Publishing books on the matter.

  • Abdullah

    Member
    February 8, 2023 at 1:07 am
  • ketchito

    Member
    February 8, 2023 at 8:43 am

    Check “Handbook of detergents part A: Properties”, that’s a better source of information and very detailed. The section about builders is mesmerizing. Here are some extracts from the book.

  • Abdullah

    Member
    February 10, 2023 at 7:59 pm

    Thank a lot.

  • PhilGeis

    Member
    June 20, 2023 at 5:17 am

    As ketchito noted - the target of a builder is chelation not the functions offered in the chart you posted.

    A Bacillus sp. has been the source of enzymes used in liquid detergents.

  • PhilGeis

    Member
    June 20, 2023 at 6:34 am

    It’s worth nothing that phosphates have generally been banned in laundry detergents.

    • Abdullah

      Member
      June 20, 2023 at 11:32 am

      Here water is very hard. TDS is 700-1200. No matter how much chelating agent i use, i cant make all those hard water soft according to my calculations.

      Currently i am working on liquid laundry detergent product to make it good enough to be competitive.

      This is my current formula

      SLS powder 6% active

      CAPB 1.5% active

      Stpp 6%

      Sodium silicate liquid 2.4:1 6%

      Water

      What are your suggestions to improve this product

      Wash water is very hard

  • PhilGeis

    Member
    June 21, 2023 at 6:43 am

    Look at back issues of Happi https://www.happi.com/

    Also consider Zeolite and do add a preservative.

    • Abdullah

      Member
      June 21, 2023 at 9:20 pm

      pH is already 11-12. Do you think i need preservative? I prefer to increase the pH even more if it is necessary to be self preserving.

      Here we have no problem in using stpp and sodium silicate and these two are available locally.

      Zeolite i have to import from another country.

      Does Zeolite have any advantage over stpp or sodium silicate?

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