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US 4,072,735 AGranted
Hot melt pressure sensitive adhesives
AssigneeEastman Kodak Company
InventorLoyce A. Ardemagni
Life of this patent
Estimating the term…
Abstract
The hot melt pressure sensitive adhesives of the present invention comprise a blend of ethylene-propylene rubber, tackifying resin, and polybutene. The hot melt adhesive blend may also contain crystalline polypropylene. This hot melt pressure sensitive adhesive has a novel combination of properties including good resistance to plasticizer migration and good heat stability.
Claims9
An adhesive composition capable of being used as a hot melt pressure sensitive adhesive comprising a blend of
- 1. 5 to 15 weight percent ethylene-propylene rubber,
- 2. 30 to 60 weight percent of at least one tackifying resin selected from the group consisting of hydrocarbon tackifier resins, polyterpene resins, and rosin esters, and
- 3. 20 to 50 weight percent polybutylene.
An adhesive composition capable of being used as a hot melt pressure sensitive adhesive comprising a blend of
- 1. 5 to 15 weight percent ethylene-propylene rubber,
- 2. 30 to 60 weight percent of at least one tackifying resin selected from the group consisting of hydrocarbon tackifier resins, polyterpene resins, and rosin esters,
- 3. 20 to 50 weight percent polybutylene, and
- 4. 1 to 5 weight percent crystalline polypropylene.
1 more element
Dependencies are inferred from the claim text.