Thermoplastic silicone elastomers formed from nylon resins
US6362287B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2000 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Mar 27, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/903
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing a thermoplastic elastomer is disclosed, said method comprising(I) mixing(A) a rheologically stable polyamide resin having a melting point or glass transition temperature of 25° C. to 275° C.,(B) a silicone base comprising(B′) 100 parts by weight of a diorganopolysiloxane gum having a plasticity of at least 30 and having an average of at least 2 alkenyl radicals in its molecule and(B″) 5 to 200 parts by weight of a reinforcing filler, the weight ratio of said silicone base to said polyamide resin being greater than 35:65 to 85:15,(C) 0.1 to 5 parts by weight of a hindered phenol compound for each 100 parts by weight of said polyamide and said silicone base,(D) an organohydrido silicon compound which contains an average of at least 2 silicon-bonded hydrogen groups in its molecule and(E) a hydrosilation catalyst, components (D) and (E) being present in an amount sufficient to cure said diorganopolysiloxane (B′); and(II) dynamically curing said diorganopolysiloxane (B′),wherein at least one property of the thermoplastic elastomer selected from tensile strength or elongation is at least 25% greater than the respective property…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.