Concentrates for improving polyester compositions and method of making same
US5801206A · kind A · utility
9Cited by
17References
37Claims
0Family size
Inventors
Key dates
| Filing date | Sep 9, 1997 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Sep 9, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2423/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a concentrate useful as an additive in a polyester composition comprising a polyolefin and a polyfunctional carboxylic acid or polyol branching agent. Also disclosed is a method of preparing a polyester composition having increased melt viscosity and melt strength, and improved impact strength which comprises the steps of A) melt compounding a polyolefin and a polyfunctional carboxylic acid or polyol branching agent, B) dry blending the melt compounded mixture formed in A) with a polyester, and C) molding or extruding the dry blended mixture formed into B) to form an article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.