Process and composition for manufacturing articles by powder moulding and articles thus obtained
US6465574B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2001 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Feb 16, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process comprising powder moulding a polymer composition having a Shore D hardness value less than 40 points; said polymer composition comprising:1) a polyolefin composition consisting of:i) 5 to less than 100 parts by weight of a crystalline or partially crystalline isotactic polymer of 1-butene; andii) more than 0 to 95 parts by weight of a thermoplastic elastomeric polyolefin composition having a melt flow rate of 20-100 g/10 min; or2) a polyolefin composition consisting of:iii) 100 parts by weight of a crystalline or partially crystalline isotactic polymer of 1-butene or composition (1); andiv) more than 0 to 100 parts by weight of an elastomeric polymer;provided that when the polymer of 1-butene is a homopolymer or a copolymer with less than 2 wt % of comonomer, polymer compositions (1) and (2) contain at least 5 parts by weight of an elastomeric polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.