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Binder composition for adhesives and sealants

Details

Inventors: Raimondi, Victor V.; Fox, Roy A.; Piorkowski, Casey E.;
Assignee: Standard Oil Company (Indiana) (Chicago, IL)
Primary Examiner: Seccuro; Carman J.
Assistant Examiner:
Attorney, Agent or Firm: Oliver; Wallace L., Gilkes; Arthur G., McClain; William T.

A binder composition useful in solventless, solvent based and water emulsifiable sealants and adhesives comprises poly(alpha-methylstyrene), polybutene and a polystyrene/elastomer block copolymer.

DETAILED DESCRIPTION We claim: 1.
A water emulsified composition containing 100 phr of a styrene/elastomer block copolymer in which an elastomer midblock comprises 60 to 90% of the copolymer and is isoprene or ethylene-butylene, about 20 to 80 phr of a poly(alpha-methylstyrene) having a softening point between about 200.
degree.
and 300.
degree.
F.
and about 40 to 900 phr of a butylene polymer comprising 85-98% of mono-olefins.
2.
The water emulsified cmposition of claim 1 containing a styrene/isoprene block cpolymer and about 40 to 400 phr of butylene polymer.
3.
The water emulsified composition of claim 1 containing a styrene/ethylene-butylene block copolymer and about 100 to 900 phr of butylene polymer.
4.
The water emulsified composition of claim 2 containing about 80 to 90 phr of butylene polymer.
5.
The water emulsified composition of claim 3 containing about 400 to 600 phr of butylene polymer.
6.
A water emulsified sealant composition of claim 2 containing effective amounts of tackifying resins, fillers and surfactants.
7.
A water emulsified adhesive composition of claim 2 containing effective amounts of tackifying resins and surfactants.
8.
A water emulsified sealant composition of claim 3 containing effective amounts of tackifying resins, fillers and surfactants.
9.
A water emulsified adhesive composition of claim 3 containing effective amounts/tackifying resins and suractants.

Description:
BACKGROUND OF THE INVENTION This invention relates to adhesives and sealants and more specifically to an improved binder portion system incorporated therein.
Compositions useful as sealants or adhesives generally include a binder portion (sometimes called the vehicle) which provides a structural base for the sealant or adhesive.
A suitable binder should have high elasticity and good cohesive strength.
Depending on the end use, a binder can be used in conjunction with a tackifying resin to provide adhesion between a substrate and the binder or along with fillers to provide bulk in a sealant

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