Process for forming anti-lumping and fast-cool vinyl aromatic expandable polymer particles
US4423160A · kind A · utility
4Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 31, 1983 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | Jan 31, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Expandable vinyl aromatic polymers are produced, which exhibit anti-lumping properties and fast-cool properties upon formation of foamed articles therefrom, by polymerizing a vinyl aromatic monomer, in which is dissolved 0.5-4.0 percent, based on the monomer, of a graded diblock rubbery copolymer of 2-50 percent of polymerized vinyl aromatic monomer and 50-98 percent conjugated diene, the polymerization forming vinyl aromatic polymer containing the graded diblock rubbery copolymer, and impregnating the polymer so produced, with a blowing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.