Solid type pressure-sensitive adhesive composition and...

Details Solid type pressure-sensitive adhesive composition and... Solid type pressure-sensitive adhesive composition and...

2005-04-19

2005-04-19

Ahmed, Sheeba (Department: 1773)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S374000, C427S207100, C427S208400

Reexamination Certificate

active

06881796

ABSTRACT:
A solid type pressure-sensitive adhesive composition containing a rubbery polymer as the main polymer; and pressure-sensitive adhesive sheets which use the pressure-sensitive adhesive composition, are excellent in adhesive strength and holding power, retain the intact holding power even when allowed to stand at high temperatures or made to have a reduced adhesive layer thickness, and are free from the problem of adhesive protrusion or adhesive remaining. The pressure-sensitive adhesive sheets comprise a substrate and formed thereon a layer comprising a solid type pressure-sensitive adhesive composition obtained by a method comprising adding a tackifier to a rubbery polymer and treating the resultant mixture with an isocyanate crosslinking agent to crosslink the polymer.

REFERENCES:
patent: 3914484 (1975-10-01), Creegan et al.
patent: 5776998 (1998-07-01), Southwick et al.
patent: 6251517 (2001-06-01), Sashihara et al.
patent: 1 389 853 (1975-04-01), None
patent: 11-80690 (1999-03-01), None
patent: 11-80690 (1999-03-01), None
“Research of Thermally Cured Special Pressure-Sensitive Adhesive Strips for Use in Electronic Capacitors”, China Adhesives, vol. 3, No. 5, 1994, with partial English translation.

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