Back to results
US 2007/0167569 A1Published application
Tie-layer adhesive compositions for styrene polymers and articles
OwnerMaged Botrosinventor
Life of this patent
Estimating the term…
Abstract
Tie-layer adhesives for styrene polymer resins are provided. The adhesive compositions suitable for use in multi-layer film and sheet constructions are blends comprising ethylene-butene-1 LLDPE resins, styrene-isoprene-styrene triblock copolymers, graft-modified polyethylene and, optionally, ethylene-propylene elastomers.
Claims18
An adhesive composition comprising:
- (a) 35 to 75 wt. %, based on the total weight of the composition, ethylene-butene-1 linear low density copolymer;
- (b) 15 to 45 wt. %, based on the total weight, styrene-isoprene-styrene triblock copolymer having a styrene content greater than 35 wt. %, melt flow rate greater than 25 g/10 min and containing less than 1 wt. % diblock;
- and
- (c) 1 to 25 wt. %, based on the total weight, polyethylene grafted with an ethylenically unsaturated carboxylic acid or acid derivative.
1 more element
An adhesive composition comprising:
- (a) 45 to 65 wt. %, based on the total weight, ethylene-butene-1 linear low density copolymer having a density from 0.916 to 0.919 g/cm3 and melt index from 0.5 to 5 g/10 min;
- (b) 20 to 34.5 wt. %, based on the total weight, styrene-isoprene-styrene triblock copolymer having a styrene content greater than 40 wt. %, melt flow rate greater than 30 g/10 min and containing less than 1 wt. % diblock;
- (c) 5 to 17.5 wt. %, based on the total weight, ethylene homopolymer or ethylene-C4-8 α-olefin copolymer grafted with 0.5 to 5 wt. % maleic anhydride and having a melt index from 0.5 to 20 g/10 min;
- and
- (d) optionally, from 1 to 20 wt. %, based on the total weight, ethylene-propylene elastomer selected from the group consisting of ethylene-propylene rubber and ethylene-propylene-diene rubber.
2 more elements
A multi-layer film or sheet comprising a styrene polymer layer and a tie-layer adhesively bonded thereto, said tie-layer comprising an adhesive composition comprising 35 to 75 wt. %, based on the total weight, ethylene-butene-1 linear low density copolymer;
- 15 to 45 wt. %, based on the total weight, styrene-isoprene-styrene triblock copolymer having a styrene content greater than 35 wt. %, melt flow rate greater than 25 g/10 min and containing less than 1 wt. % diblock;
- 1 to 25 wt. %, based on the total weight, polyethylene grafted with an ethylenically unsaturated carboxylic acid or acid derivative;
- and, optionally, 1 to 20 wt. %, based on the total weight, ethylene-propylene elastomer.
Dependencies are inferred from the claim text.