Hairy polymeric nanoparticles

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

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C525S271000

Reexamination Certificate

active

07408005

ABSTRACT:
This invention discloses a process for synthesizing a hairy polymer particle which comprises the steps of (1) polymerizing a vinyl aromatic monomer by emulsion polymerization in an aqueous medium to produce core particles, (2) recovering the core particles from the aqueous medium, (3) dispersing the core particles in an organic solvent, (4) adding an organo-lithium compound to the dried core particles in the organic solvent to produce the hairless core initiator, and (5) utilizing the hairless core initiator to initiate the anionic polymerization of a conjugated diolefin monomer in an organic solvent to produce a solution of the hairy polymer particles. The hairy polymer nanoparticles can then be recovered from the organic solvent. These hairy polymer particles are comprised of (1) a core which is comprised of a polymer of a vinyl aromatic monomer and (2) hairs which are polymer chains of a conjugated diolefin monomer, wherein the hairs are covalently bonded to the core. The core is typically spherical in shape, has a diameter of less than 1000 nm, and is comprised of a crosslinked polymer of a vinyl aromatic monomer. The hairy polymer particles of this invention are useful as fillers in rubber compositions used in making articles of manufacture, such as tires, hoses, power transmission belts, windshield wiper blades, and the like.

REFERENCES:
patent: 4695607 (1987-09-01), Spinelli
patent: 5395891 (1995-03-01), Obrecht et al.
patent: 5585441 (1996-12-01), Brandes et al.
patent: 6127488 (2000-10-01), Obrecht et al.
patent: 6133364 (2000-10-01), Obrecht et al.
patent: 6207757 (2001-03-01), Obrecht et al.
patent: 6242534 (2001-06-01), Obrecht et al.
patent: 6437050 (2002-08-01), Krom et al.
patent: 6653404 (2003-11-01), Konno et al.
patent: 6747095 (2004-06-01), Konno et al.
patent: 6777500 (2004-08-01), Lean et al.
patent: 2003/0198810 (2003-10-01), Wang et al.
patent: 2006/0141150 (2006-06-01), Zheng et al.
Szakacs et al., STN AN 1978:191563 (1984).
File Registry of STN, entry for RN 501-60-0 (1984), no author.

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

Hairy polymeric nanoparticles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hairy polymeric nanoparticles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hairy polymeric nanoparticles will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4015476

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