Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1995-08-25
1997-05-27
Zemel, Irina S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525250, 525314, C08F29702, C08F 446
Patent
active
056333234
ABSTRACT:
A multifunctional anionic polymerization initiator which is in the form of a star-shaped polymer soluble in an apolar medium and substantially free of residual double bonds. The initiator is denoted by the general formula (PA).sub.a N.sup.n- nLi.sup.+. PA is a polymer block of a vinylaromatic or diene monomer A. The variable "a" is the number of branches in the block PA. N is a crosslinked core comprising no or practically no residual double bonds and has the formula (PMc)(RLi).sub.p. Mc is a monomer containing at least two polymerizable double bonds per molecule. PMc is a crosslinked core of at least one polymerized monomer Mc, containing 3 to 30% of residual double bonds in relation to the initial double bonds originating from the monomer Mc. R is an alkyl, aryl, arylalkyl, alkylaryl, cycloalkyl, or alkenyl. The variable "p" is the number of residual double bonds in PMc which are neutralized by RLi. The variable "n" is the number of anionic sites present in the crosslinked core N. A process of making and using the initiator to prepare star-shaped polymers.
REFERENCES:
patent: 3787510 (1974-01-01), Farrar
patent: 4010226 (1977-03-01), Crossland
patent: 4678837 (1987-07-01), Mancinelli
patent: 5247026 (1993-09-01), Erikson
Tsitsilanis, et al. "Core-First Synthesis of Star Polymers", Macromolecules, v24, 1991, 22, pp. 5897-902.
Heim Philippe
Lutz Pierre
Nicol Pascal
Rein David
Rempp Paul
Elf Atochem S.A.
Zemel Irina S.
LandOfFree
Multifunctional initiator for obtaining star-shaped polymers by does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multifunctional initiator for obtaining star-shaped polymers by , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multifunctional initiator for obtaining star-shaped polymers by will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2329738