Metal molds coated with oxidative stable polyoxyalkylene release agents
US4217394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1978 |
| Grant date | Aug 12, 1980 |
| Priority date | — |
| Expiry date | Dec 26, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There are disclosed mold-release compositions suitable for lubricating metal molds which are used in molding natural and synthetic rubber and other polymers. The mold release agents of the invention are oxidation-stable homopolymer and copolymer, i.e., block or heteric polyoxyalkylene lubricant compounds. The lubricants of the invention can be used alone or in mixtures with prior art polyoxyalkylene lubricant compounds. The polyoxyalkylene mold release lubricants of the invention have the formula: ##STR1## R is individually selected from alkyl groups of 1 to about 21 carbon atoms, preferably about 7 to about 21 carbon atoms, and most preferably about 12 to about 18 carbon atoms. In lubricants I and III, R.sub.1 and R.sub.2 are the residue of the same or different and in lubricant II different alkylene units, all individually selected from the group consisting of the residue of ethylene oxide, propylene oxide, butylene oxide and an aromatic glycidyl ether, R.sub.3 is the residue of a difunctional phenol, R.sub.4 is hydrogen, an acyl or alkyl group and where alkyl, derived from an aliphatic monofunctional alcohol having 1 to about 21 carbon atoms, preferably about 4 to about 18 carbo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.