Apparatus and method for the dispersion of minute bubbles in liquid materials for the production of polymer foams
US5403088A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1993 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Jun 18, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F2101/2805
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Apparatus (20) for the dispersion of minute bubbles in a liquid resin material comprises high pressure tank means (21) containing a liquid resin material (M) under pressure; means for delivering (45) at least one agent selected from the group consisting of blowing agents and nucleating agents into the liquid resin material; means for agitating (63) the mixture of liquid resin material and the selected agent within the tank; means for shearing (60) the mixture; and control means (50) for determining the population of bubbles of the agent within the mixture and provides an output signal for controlling operation of the means for shearing, thereby altering the fineness of dispersion of the agent in the liquid resin material as desired. A method for the dispersion of minute bubbles in a liquid resin material comprising the steps of withdrawing a quantity of the liquid resin material and an agent selected from the group consisting of gaseous and liquid blowing agents and nucleating agents from a supply tank; controlling the operation of means for shearing the liquid resin material and dispersed blowing agent, positioned within the supply tank, thereby affecting as desired the size and h…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.