Graft copolymers and blends thereof with polyolefins

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

525 80, 525301, 525309, C08L 5106, C08F25502, C08F25508

Patent

active

051284103

ABSTRACT:
A novel graft copolymer capable of imparting to a polyolefin when blended therewith high tensile modulus and high sag resistance without increasing melt viscosity, and a method of making the same. The graft copolymer is a polyolefin having a relatively high weight-average molecular weight methacrylate polymer grafted thereto. The graft copolymer is formed by dissolving or swelling a non-polar polyolefin in an inert hydrocarbon solvent, heating to dissolve the polyolefin, and while stirring the mixture, adding a methacrylate monomer, together with an initiator to produce a constant, low concentration of radicals, to from a graft copolymer with a high molecular weight polymer chain covalently bonded or grafted to the polyolefin backbone. The graft copolymer can be separated from the solvent, isolated by volatilizing the solvent, for example in a devolatilizing extruder, and extruded into a desired shape such as a sheet, tube or the like. This graft copolymer can be blended with a polyolefin matrix. The blend exhibits improved physical properties in the melt, upon cooling, and in the solid state, and is useful in cast and oriented films, solid extruded rod and profile, foamed rod, profile and sheet, blown bottles and the like. The graft copolymer further improves compatibility in a wide range of polymer blends.

REFERENCES:
patent: 3886227 (1975-05-01), Van Brederode et al.
patent: 4555546 (1985-11-01), Patel
patent: 4595726 (1986-06-01), Klosiewicz
patent: 4842947 (1989-07-01), Jachec et al.
patent: 4957974 (1990-09-01), Ilenda et al.
patent: 4997884 (1991-03-01), Ilenda et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Graft copolymers and blends thereof with polyolefins does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Graft copolymers and blends thereof with polyolefins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Graft copolymers and blends thereof with polyolefins will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1830448

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.