Anti-spotting and anti-filming hard surface cleaning formulations and methods
US6455486B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2000 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Oct 31, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3788
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Cleaning formulations and methods are provided by which solid deposition is inhibited on hydrophobic hard surfaces typically encountered in bathroom and outdoor environments without detrimentally affecting the appearance of such surfaces. The formulations most preferably include an aqueous mixture of an organically solvated nonionic copolymer, a polyacrylic acid homopolymer and a nonionic surfactant. Optionally, a hydrotrope may also be present in the formulation. Most preferably, the formulations of this invention have a pH between about 4.0 to about 7.0, most preferably around neutral (i.e., about 7.0). In specific embodiments, the formulations include an aqueous mixture of (a) a graft copolymer of polyalkylene oxide with vinyl ester, the graft copolymer having a molecular weight within the range of about 5,000 to 50,000, (b) at least one polycarboxylate selected from the group consisting of acrylic acid/maleic acid copolymers, having a molecular weight within the range of about 1,000 to 100,000 and polyacrylic acid having a molecular weight of from about 1,000 to about 100,000, (c) at least one nonionic surfactant selected from the group consisting of alcohol alkoxylates, alcoho…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.