Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1993-06-24
1995-08-01
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525250, 525271, 525285, 525315, 5253323, 5253325, 525940, 525 98, C08F29704
Patent
active
054381029
ABSTRACT:
There are disclosed novel, solid, elastomeric block copolymers having excellent oxidative and thermal stability, wherein the terminal blocks are each a polymer (D polymer) of at least one conjugated diene D, which is a hydrocarbon containing a 1,3-conjugated diene structure wherein the 2 and 3 carbon atoms are each additionally bonded to a hydrocarbyl side group, e.g., 2,3-dimethyl-1,3-butadiene, with a preponderance of polymerized D units being 1,4 units; and at least one interior block is a hydrogenated polymer (I polymer) of at least one conjugated diene I which is a hydrocarbon containing a 1,3-conjugated diene structure wherein one of the 2- and 3-carbon atoms is additionally bonded to a hydrocarbyl side group and the other is additionally bonded to a hydrogen atom, e.g. isoprene. The block copolymers may be prepared by selectively hydrogenating substantially all the I polymer units of a precursor block copolymer with a sufficient number of D units in the D polymer blocks retaining their unsaturation on selective hydrogenation to enable the vulcanization of the block copolymer.
REFERENCES:
patent: 4107236 (1978-08-01), Naylor et al.
patent: 4294942 (1981-10-01), Henderson
patent: 4304881 (1981-12-01), Aoki et al.
patent: 4879349 (1989-11-01), Hoxmeier
patent: 5187236 (1993-02-01), Coolbaugh et al.
Falk, Journal of Polymer Science: Part A-1, vol. 9, 2617-2623, 1971.
Falk et al., Die Angewandte Makromelekulare Chemie 21 (1972), 17-23 (No. 286).
Mohajer et al., "Hydrogenated linear block copolymers of butadiene and isoprene: effects of variation of composition and sequence architecture on properties," Polymer, 1982, vol. 23, Sep., 1523-1535.
Brandes Ellen B.
Loveless Frederick C.
Keen M. D.
McKillop A. J.
Mobil Oil Corporation
Seidleck James J.
Warzel M. L.
LandOfFree
Solid elastomeric block copolymers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solid elastomeric block copolymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solid elastomeric block copolymers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-734227