Blends of polyolefins with polymers containing reactive agents
US4678834A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Jul 18, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A polyolefin blend comprising, in physical admixture, a major portion of particles of a polyethylene and a minor portion of particles of a composition of a thermoplastic second polymer, is disclosed. The polyethylene is selected from the group consisting of homopolymers of ethylene and copolymers of ethylene and at least one C.sub.4 -C.sub.10 higher alpha-olefin, and the second polymer is a normally solid thermoplastic polymer having a melting point of less than 185.degree. C. and a shear viscosity that is not more than that of the polyethylene when measured at 200.degree. C. and a shear rate of 400 sec.sup.-1 with the proviso that the second polymer is not a homopolymer or copolymer derived solely from hydrocarbon alpha-olefins having 2-10 carbon atoms. Examples of second polymers are (a) homopolymers and copolymers of unsaturated hydrocarbons in which at least one monomer is other than a C.sub.2 -C.sub.10 alpha-olefin, e.g. ethylene/propylene elastomers, polystyrene and styrene/butadiene/styrene copolymers, (b) copolymers of ethylene with ethylenically unsaturated carboxylic acids and anhydrides, and esters thereof, and (c) modified polymers e.g. chlorinated polyethylene, grafted…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.