Elastomer composition
AssigneeUrgo Recherche Innovation Et Developpement
InventorChristelle Marie Aline Guillamaud
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Abstract
A composition based on triblock copolymers of the ABA type, including two styrene thermoplastic terminal blocks A, glassy at use temperature, and an elastomeric central block B which is a saturated olefin, at least one linear polymer of the polyisobutene type having a very low molecular weight and specific crosslinked polymer particles. The composition exhibits advantageous adhesion and holding properties on the skin which are similar to the properties obtained by matrices based on silicone elastomers. They also exhibit particularly interesting cohesion.
Claims20
A composition comprising:
- 2.5 to 20% of a styrene—saturated olefin—styrene triblock copolymer
- 30 to 96.5% by weight of a polyisobutene with a number molecular weight of between 700 g·mol−1 and 3000 g·mol−1, and
- 1 to 25% by weight of particles of a crosslinked polymer having a carboxylate group density of between 2.0 and 12.0 meq/g and an average pore size of between 0.005 and 1.0 μm, the percentages being expressed by weight, relative to the total weight of the composition.
A composition comprising:
- 4 to 12% by weight of a styrene—saturated olefin—styrene triblock copolymer,
- 30 to 70% by weight of a polyisobutene with a number molecular weight of between 700 g·mol−1 and 3000 g·mol−1,
- 20 to 70% by weight of a plasticizer, and
- 1 to 25% by weight of particles of a crosslinked polymer having a carboxylate group density of between 2.0 and 12.0 meq/g and an average pore size of between 0.005 and 1.0 μm, the percentages being expressed by weight, relative to the total weight of the composition.
Dependencies are inferred from the claim text.