Alkaline detergent compositions
AssigneePennwalt Corporation
InventorCharles Bullick Talley
Life of this patent
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Abstract
This invention discloses alkaline detergent compositions for cleaning solid surfaces including returnable food and beverage containers such as are used for milk, ice cream mixes, soft drinks and similar materials. The alkaline detergent compositions are particularly adapted for cleaning bottles fabricated from polycarbonate resins without damaging the polycarbonate but are also useful on glass, polypropylene and polyethylene surfaces. Granular detergents, aqueous concentrates and aqueous use solutions are described. The alkaline detergents can be used in mechanical spray or soak-tank washers.
Claims13
The granular concentrate for dissolving in water to clean soiled surfaces made from polycarbonate, polypropylene, polyethylene or glass, said concentrate consisting essentially of the following ingredients expressed as percent by weight:
- Alkali metal silicate selected from the group consisting of orthosilicates and metasilicates - 5 to 28,
- Alkali metal phosphate - 5 to 27,
- Alkali metal methyl naphthalene sulfonate - 1 to 15,
- Sodium bicarbonate - 5 to 15,
- Defoaming agent - 0 to 6,
- Detergent builder selected from the group consisting of sodium sulfate, sodium chloride, sodium sesquicarbonate, sodium sesquisilicate, sodium carbonate, sodium bicarbonate, and mixtures thereof - 83 to 0.
- and C-21 dicarboxylic detergent represented by the formula ##STR2## in which one X is hydrogen while the second X is carboxylic, "in which R can be COOH and CH.sub.2 OSO.sub.3 H and their alkali metal salts" 1 to 9.
The granular concentrate for dissolving in water to clean soiled surfaces made from polycarbonate, polypropylene, polyethylene or glass, said concentrate consisting essentially of the following ingredients expressed as percent by weight:
- Alkali metal silicate selected from the group consisting of orthosilicates and metasilicates - 10 to 20,
- Alkali metal phosphate - 10 to 20,
- Alkali metal methyl naphthalene sulfonate - 5 to 10,
- Sodium bicarbonate - 5 to 10,
- Defoaming agent - 3 to 5,
- Detergent builder selected from the group consisting of sodium sulfate, sodium chloride, sodium sesquicarbonate, sodium sesquisilicate, sodium carbonate, sodium bicarbonate and mixtures thereof - 62 to 28,
- and C-21 dicarboxylic detergent represented by the formula ##STR3## in which one X is hydrogen while the second X is carboxylic, "in which R can be COOH and CH.sub.2 OSO.sub.3 H and their alkali metal salts" - 5 to 7.
The granular concentrate for dissolving in water to clean soiled surfaces made from polycarbonate, polypropylene, polyethylene or glass, said concentrate consisting essentially of the following ingredients expressed as percent by weight:
- Alkali metal silicate selected from the group consisting of orthosilicates and metasilicates - 10 to 20,
- Alkali metal phosphate - 15 to 27,
- Alkali metal methyl naphthalene sulfonate - 2 to 5,
- Sodium bicarbonate - 5 to 10,
- Defoaming agent - 4 to 6,
- Detergent builder selected from the group consisting of sodium sulfate, sodium chloride, sodium sesquicarbonate, sodium sesquisilicate, sodium carbonate, sodium bicarbonate, and mixtures thereof - 63 to 30,
- and C-21 dicarboxylic detergent represented by the formula ##STR4## in which one X is hydrogen while the second X is carboxylic, "in which R can be COOH and CH.sub.2 OSO.sub.3 H and their alkali metal salts" - 1 to 2.
Dependencies are inferred from the claim text.