Silica reinforced solventless elastomeric adhesive compositions

Details Silica reinforced solventless elastomeric adhesive compositions Silica reinforced solventless elastomeric adhesive compositions

1996-02-20

2001-02-13

Knable, Geoffrey L. (Department: 1733)

Resilient tires and wheels

Tires, resilient

Anti-skid devices

C156S096000

Reexamination Certificate

active

06186202

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to elastomeric laminates containing an adhesive composition or cushion layer which has a low, final blowout test temperature. More specifically, the present invention relates to a silica reinforced solventless elastomeric adhesive composition having a sulfur containing alkylene alkoxy silane coupling agent and generally having low or nil amounts of carbon black.
BACKGROUND OF THE INVENTION
Heretofore, adhesive compositions for adhering elastomeric components to one another have generally contained volatile organic compounds (VOC) i.e., solvents, therein. Existing solventless adhesive based polybutadiene
atural rubber compositions compounded with carbon black and other ingredients while having strong adhesive bond strength when utilized as an adhesive cushion are nevertheless unsuitable because of high heat generation during flexing and consequent failure in meeting blowout resistant requirements.
The term “phr” where used herein means “parts per weight of a specified material per 100 parts by weight rubber, or elastomer, in a rubber composition”.
SUMMARY OF THE INVENTION
The adhesive composition or cushion layer can be utilized to bond various elastomeric layers together such as a retread layer to a tire casing, or the ends of a tire tread to one another. The adhesive composition is reinforced with silica and has low or nil amounts of carbon black, is solventless, and contains effective amounts of a coupling agent such as a sulfur containing alkylene alkoxy silane to produce a low, final blowout test temperature.


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