Glycol antifreeze mixtures
US4077894A · kind A · utility
14Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1976 |
| Grant date | Mar 7, 1978 |
| Priority date | — |
| Expiry date | Dec 27, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D19/0404
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A glycol-based antifreeze formulation containing as a defoaming agent, from 0.001% to about 1.0% by weight of a mixture containing a compound of the formula ##STR1## WHEREIN R is an alkyl, alkoxyalkyl, hydroxyalkyl, or dihydroxyalkyl group having from 1 to 6 carbon atoms, R.sup.1 is hydrogen, methyl or ethyl, R.sup.2 is an alkyl group having 1 to 8 carbon atoms, p is an integer from 1 to 20, and n is an integer from 1 to 14; and a compound of the formula EQU RO--(C.sub.6 H.sub.10 O.sub.5).sub.p --H wherein R and p are as defined above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.