High impact resistant macromolecular networks
US5278243A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 1992 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | Jan 14, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F283/124
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A high impact resistant macromolecular network is disclosed that includes a basic, stiff framework interconnected by soft, shock-absorbing multiple bridges to cushion thermoelastic stresses. The network is prepared by polymerizing or copolymerizing with vigorous agitation, an unsaturated hard material (characterized in that when homopolymerized, it forms a polymeric material that is below its glass transition temperature at ambient temperature), in the presence of a soft moiety selected from the group consisting of vinyl substituted siloxane, allyl substituted siloxane, acrylate terminated or substituted siloxane, and unsaturated hydrocarbon polymer, to form a partially polymerized mixture in which the soft moiety is homogeneously distributed; pouring the partially polymerized mixture into a mold, and then completing the polymerization without agitation. The final products are dimensionally exact and stable, transparent, easily machinable and resilient, and can be designed to have good optical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.