Compounding process for achieving uniform, fine particle size dispersion of curing agents in the substantial absence of solvents and a sealant produced thereby
US6303694A · kind A · utility
12Cited by
13References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2000 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Feb 18, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2321/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the preparation of a sealant composition by mixing an elastomer in the substantial absence of an organic solvent and separately dispersing a quinoid curing agent in a polymer having a molecular weight below about 5,000 to form a curing agent concentrate. Thereafter, combining the curing agent concentrate with the elastomer to form the sealant composition. The composition is a rubber masterbatch having many applications and is advantageously, substantially free from organic solvents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.