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Adhesive-for-double-glazing-units

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Adhesive for double glazing units

Details

Inventors: Marzouki, Taieb; Schwisser, Bernd;
Assignee: USM Corporation (Farmington, CT)
Primary Examiner: Lieberman; Paul
Assistant Examiner:
Attorney, Agent or Firm: Morley; John P.

An improved two-part adhesive system particularly adaptable for preparing multi-pane glazing units and improved spacer frames for multi-pane glazing units.

DETAILED DESCRIPTION What we claim is: 1.
A sealant system comprising an adhesive composition and a primer composition which on combination provide a cured adhesive; said adhesive composition being a composition which is extrudable as a hot melt from about 140.
degree.
C.
to about 190.
degree.
C.
and is hardenable to yield a non-tacky, cohesive elastic mass having a moisture vapor transmission rate of not more than about 0.
5 g/m.
sup.
2 /day measured at 38.
degree.
C.
and comprising per hundred parts by weight of the adhesive composition, from about 5 to about 50 parts by weight of a block copolymer having two polystyrene end blocks linked to a substantially saturated polyolefin rubber midblock, from about 5 to about 50 parts by weight of an aliphatic hydrocarbon resin having a melting point not less than 60.
degree.
C.
, from about 2 to about 40 parts by weight of a curable epoxy resin and a finely divided inorganic filler; said primer composition comprising a heat softenable polymeric composition and an amine curing agent for the epoxy resin in the adhesive composition.
2.
A sealant system comprising an adhesive composition and a primer composition which on combination provide a cured adhesive; said adhesive composition being a composition which is extrudable as a hot melt from about 140.
degree.
C.
to about 190.
degree.
C.
and is hardenable to yield a non-tacky cohesive elastic mass having a moisture vapor transmission rate of not more than about 0.
1 g/m.
sup.
2 /day measured at 25.
degree.
C.
and comprising per hundred parts by weight of the adhesive composition, from about 5 to 50 parts by weight of a block copolymer having two polystyrene end blocks linked to a substantially saturated polyolefin rubber mid-block, from about 5 to about 50 parts by weight of an aliphatic hydrocarbon having a melting point of not less than about 60.
degree.
C.
, from about 2 to about 40 parts by weight of a curable epoxy resin and, a finely divided inorganic filler; said primer composition comprising a heat softenable polymeric composition and an amine curing agent for the epoxy resin in the adhesive composition

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