Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1996-03-13
1998-09-08
Warzel, Mark L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525105, 525 89, C08L 5302, C08F29704
Patent
active
058046631
ABSTRACT:
Radiation sensitive block copolymers to be used in hot melt adhesive composition characterized in that they have the general formula (AB).sub.p (B.sup.1).sub.q X, wherein A is poly(vinylaromatic) block and B and B.sup.1 are poly(butadiene) blocks, wherein X is the residue of a hexavalent coupling agent, wherein p and q both have a number average value in the range from 1.5 to 4.5, whereas the sum of p and q values being 6, wherein the block copolymers have an average bound vinyl aromatic content in the range of from 10 to 50 wt %, preferably in the range of from 10 to 30 wt %, a total apparent molecular weight in the range of from 100,000 to 500,000, and a vinyl content in the poly(butadiene) blocks in the range of from 35 to 70 wt %.
REFERENCES:
patent: 3917607 (1975-11-01), Crossland et al.
patent: 3984509 (1976-10-01), Hall et al.
patent: 5212249 (1993-05-01), Richie et al.
patent: 5300582 (1994-04-01), Debier et al.
patent: 5369175 (1994-11-01), Hoxmeier et al.
patent: 5576395 (1996-11-01), Spence et al.
De Craene Luc Ives Jaak
De Keyzer Noel Raymond Maurice
DuPont Martine Jeanne
Morren Karin Marie-Louise Renee
Van Westrenen Jeroen
Shell Oil Company
Warzel Mark L.
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