Low-foaming, pH sensitive, alkylamine polyether surface active agents and methods for using
US4605773A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1984 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | May 10, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Alkylamine polyether surface active agent compositions and methods for using are described. The instant compositions are low foaming, and pH sensitive and are generally of the structure: ##STR1## in which (a) R.sub.1 may be hydrogen or alkyl; PA1 if R.sub.1 is hydrogen then R.sub.2, R.sub.3 and R.sub.4 must be alkyl having a total number of carbon atoms falling in the range of 7 to 23; PA1 if R.sub.1 is alkyl, then R.sub.2, R.sub.3 and R.sub.4 may be alkyl or hydrogen, the total number of carbon atoms in R.sub.1 +R.sub.2 +R.sub.3 +R.sub.4 falling in the range of 7 to 36 (preferably about 10 to 20); PA0 (b) The --(C.sub.2 H.sub.4 O).sub.m --segment must be a poly(oxyethylene) homogeneous chain or "block" polymer (i.e., a homopolymer), m having an average value in the range of 1 to 15, preferably 5 to 13; and PA0 (c) Y is selected from the group consisting of: PA1 (1) homogeneous poly(oxypropylene) chain (PO) "block" polymer or residue (i.e., a homopolymer), of the structure--(C.sub.3 H.sub.6 O).sub.n H, having a value in the range of 1 to 50, preferably 6 to 30; PA1 (2) hydrophobic end cap (e.g., --CH.sub.2 --0); and PA1 (3) hydrophobic end capped polyoxypropylene residue. A particu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.