Molded article and process for producing same
US6383654B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1999 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Aug 19, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is disclosed a molded article comprising:(i) a part containing a hard synthetic resin; and(ii) a part containing a soft propylene based block copolymer; wherein the both parts are integrated with each other, and the soft propylene based block copolymer is prepared by a process comprising the steps of:(I) carrying out copolymerization of propylene with ethylene until a content of a component(A) which is a propylene-ethylene copolymer component having a content of a repeating unit derived from ethylene of from about 1.5 to 6.0% by weight reaches from about 40 to 85% by weight based on the total weight of the component(A) and a below-defined component(B); and(II) carrying out copolymerization of propylene with ethylene in the presence of the component (A) prepared instep (I) until a content of the component(B), which is a propylene-ethylene copolymer component having a content of a repeating unit derived from ethylene of from about 7 to 17% by weight, reaches from about 15 to 60% by weight based on the total weight of the components (A) and (B);provided that an intrinsic viscosity, [&eegr;]B, of the component(B) is from about 2 to 5 dl/g, and a ratio of [&eegr;]B to an intrinsic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.