Melt-blended resin composition of hydrolyzed ethylene/vinyl acetate copolymers
US4349644A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1981 |
| Grant date | Sep 14, 1982 |
| Priority date | — |
| Expiry date | Apr 2, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31909
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A melt-blended composition containing at least two kinds of hydrolyzed ethylene-vinyl acetate copolymers having a different ethylene content from each other within the range of 20 to 55% by mole, a degree of hydrolysis in vinyl acetate component of at least 80% by mole and a specific melt tension as defined herein, the hydrolyzed copolymers included in the largest amount and the second largest amount among the hydrolyzed copolymers constituting the composition having a specific relationship with each other in weight ratio and ethylene content and the fusion curve of the composition indicating substantially single peak. The composition has an improved melt-moldability, and provides molded articles having remarkably reduced fish eyes and uniform thickness or excellent dimensional stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.