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US 6,613,831 B1Granted
Cold sealable adhesive
AssigneeSovereign Holdings, LLC
InventorsChristine Bentley, Brian William Stephenson
Life of this patent
Estimating the term…
Abstract
The invention relates to the use of synthetic cis-1,4-polyisoprene as a cold sealable adhesive. A layer 14 of the cold sealable adhesive may be applied to substrates 10 and 12 which may then be bonded when the layers 14 are brought into contact.
Claims27
An adhesive emulsion composition comprising:
- a) from about 10 to about 74 wt % of synthetic cis-1,4-polyisoprene;
- b) from about 0.4 to about 60 wt % of a further synthetic polyner comprising one or more polymers selected from the group consisting of the type based on:
- acrylic monomers;
- vinyl acetate monomers;
- copolymers of acrylics;
- copolymers containing vinyl acetate;
- chlorinated rubbers;
- and mixtures thereof, selected such that the composition has improved adhesion to polymer films and has improved block resistance in comparison with an adhesive not Including said further synthetic polymer;
- c) from about 0.05 to about 0.3 wt % of an emulsion stabilizer;
- and
- d) water.
8 more elements
A method of coating a substrate of a packaging structure comprising the steps of:
- forming a layer of adhesive along a side of the substrate wherein the adhesive comprises an emulsion comprising from about 10 to about 74 wt % of synthetic cis-1,4-polyisoprene;
- from about 0.5 to about 60 wt % of further synthetic polymer being selected such that the composition has improved adhesion to polymer substrates and has improved block resistance in comparison with an adhesive not including said further synthetic polymer;
- and water.
A method of adhering substrates by coldsealing comprising the steps of:
- forming a layer of adhesive along a side of a first substrate and a side of a second substrate, wherein the adhesive comprises an emulsion comprising from about 10 to about 74 wt % of synthetic cis-1,4-polyisoprene;
- from about 0.4 to about 60 wt % of further synthetic polymer being selected such that the composition has improved adhesion to polymer substrates and has improved block resistance in comparison with an adhesive not Including said further synthetic polymer;
- and water;
- and
- contacting said side of a first substrate having a layer of adhesive and said side of a second substrate having a layer of adhesive under pressure, wherein each of said layers of adhesive are sealed to one another.
2 more elements
Dependencies are inferred from the claim text.