Method of washing glassware and inhibited cleaning solution and

Details Method of washing glassware and inhibited cleaning solution and Method of washing glassware and inhibited cleaning solution and

1975-11-05

1977-04-12

Weinblatt, Mayer

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

252135, 252192, 134 29, 134 42, C11D 706

Patent

active

040174107

ABSTRACT:
Soiled hot end coated glassware having a substantially colorless and transparent thin protective coating thereon including an organic coating material is washed in an inhibited aqueous caustic soda cleaning solution to inhibit the deleterious effects of repeated washings and thereby increase the effective life of the protective coating. The cleaning solution comprises on a weight basis from 0.3 to 6% of caustic soda, from 0.01% to 0.3% of at least one soluble zinc containing compound when calculated as zinc oxide, and the remainder water. Other ingredients which may be present include from 0.002 to 0.05% of a synthetic organic phosphate ester anionic surfactant having hydrotrophic properties, from 0.001 to 0.03% of a low foaming synthetic alkoxylated nonionic surfactant, and from 0.008 to 0.2% of a hard water conditioning sequesterant. The protective coating preferably comprises polyethylene, and for best results a metal oxide layer is applied to the surface of the glassware while hot and a layer of the organic coating material is applied thereover and bonded thereto. A novel inhibited caustic soda cleaning solution having the above composition is provided, and also a liquid additive composition which is useful in preparing the cleaning solution and maintaining the ingredients thereof at proper concentrations. The desirable properties of the hot end coated glassware such as improved lubricity and increased strength are preserved and unsightly discoloration is prevented.

REFERENCES:
patent: 2419805 (1947-04-01), Wegst et al.
patent: 2447297 (1948-08-01), Wegst et al.
patent: 3705856 (1972-12-01), Sedliar et al.

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