Having described the invention the following is claimed:
1. A gas generating material comprising:
an oxidizer;
a fuel; and
a binder, which includes a polystyrene based thermoplastic block copolymer and a thermoplastic modifier miscible with the polystyrene based thermoplastic block copolymer and having a glass transition temperature greater than about 170 C.
2. The gas generating material of claim 1 wherein the thermoplastic modifier has a glass transition temperature of about 205 C. to about 210 C.
3. The gas generating material of claim 1 wherein the polystyrene based thermoplastic block copolymer does not degrade the flexibility of the polystyrene based thermoplastic elastomer at a temperature of about 40 C.
4. The gas generating material of claim 1 wherein the polystyrene based thermoplastic block copolymer comprises a hard block and a soft block and wherein the hard block includes polystyrene.
5. The gas generating material of claim 4 wherein the soft block is a polyolefin selected from the group consisting of polyethylene, polybutylene, polybutadiene, polyisoprene, poly(ethylene-ran-butylene), and poly(ethylene-ran-propylene).
6. The gas generating material of claim 1 wherein the polystyrene based thermoplastic block copolymer is selected from the group consisting of polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene, polystyrene-block-poly(ethylene-ran-butylene), polystyrene-block-poly(ethylene-ran-propylene)-block-polystyrene, polystyrene-block-poly(ethylene-ran-propylene), polystyrene-block-polybutadiene-block-polystyrene, polystyrene-block-polybutadiene, polystyrene-block-polyisoprene-block-polystyrene, polystyrene-block-polyisoprene and mixtures thereof.
7. The gas generating material of claim 1 wherein the polystyrene based thermoplastic block copolymer comprises a diblock copolymer, a triblock copolymer, or a mixture of diblock copolymer and a triblock copolymer.
8. The gas generating material of claim 1 wherein the thermoplastic modifier comprises a polyether.
9. The gas generating material of claim 8 wherein the polyether includes poly(phenylene ether).
10. The gas generating material of claim 1 wherein the thermoplastic modifier comprises poly(2,6-dimethyl-1,4-phenylene ether).
11. The gas generating material of claim 1 wherein the binder further includes a second thermoplastic modifier miscible with the polystyrene based thermoplastic block copolymer and the thermoplastic modifier, the second thermoplastic modifier having a glass transition temperature between the glass transition temperature of the polystyrene based thermoplastic block copolymer and the glass transition temperature of the thermoplastic modifier.
12. The gas generating material of claim 11 wherein the second thermoplastic modifier comprises poly(-methylstyrene).
13. The gas generating material of claim 1 wherein the binder comprises about 1% to about 95% by weight, based on the weight of the binder, of the polystyrene based thermoplastic block copolymer and about 1% to about 35% by weight, based on the weight of the binder, of the thermoplastic modifier.
14. The gas generating material of claim 11 wherein the binder comprises about 1% to about 95% by weight, based on the weight of the binder, of the polystyrene based thermoplastic block copolymer, about 1% to about 35% by weight, based on the weight of the binder, of the thermoplastic modifier, and about 0% to about 60% by weight, based on the weight of the binder, of the second thermoplastic modifier.
15. A binder composition suitable for use in a gas generating material comprising:
a polystyrene based thermoplastic block copolymer;
a polyether thermoplastic modifier miscible with said polystyrene based thermoplastic block copolymer; and
a second thermoplastic modifier miscible with said polystyrene based thermoplastic block copolymer, said second thermoplastic modifier being selected from the group consisting of poly(-methyl styrene) and poly(styrene-co–methyl styrene).
16. The binder composition of claim 15 wherein the polystyrene thermoplastic block copolymer is selected from the group consisting of polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene, polystyrene-block-poly(ethylene-ran-butylene), polystyrene-block-poly(ethylene-ran-propylene)-block-polystyrene, polystyrene-block-poly(ethylene-ran-propylene), polystyrene-block-polybutadiene-block-polystyrene, polystyrene-block-polybutadiene, polystyrene-block-polyisoprene-block-polystyrene, polystyrene-block-polyisoprene.
17. The binder composition of claim 15 wherein the polystyrene based thermoplastic block copolymer is selected from the group consisting of poly(styrene)-block-poly(ethylene-ran-butylene), poly(styrene)-block-poly(ethylene-ran-butylene)-block-polystyrene, and a mixture of poly(styrene)-block-poly(ethylene-ran-butylene) and poly(styrene)-block-poly(ethylene-ran-butylene)-block-polystyrene.
18. The binder composition of claim 15 wherein the polyether thermoplastic modifier comprises poly(2,6-dimethyl-1,4-phenylene ether).
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A constructive device for packaging underwear comprising a cardboard or a laminate; and
a plastic cover that envelops the cardboard including an underwear fixed to the cardboard; the cardboard is divided into two sections which are configured to fold along a folding line; the sections of the cardboard comprise a top cover and a lower back cover, the lower back cover includes a set of cutouts that create openings for introducing and fastening sides of the underwear, including the mid-lower part, of the underwear; said cardboard being inside the plastic cover, which substantially covers inner and outer surfaces of each of the sections.