1. A polyolefin resin composition comprising 25 to 70 weight percent of polyolefin resin and 75 to 30 weight percent of an inorganic filler wherein the polyolefin resin comprises 40 to 80 weight percent of polyethylene resin and 60 to 20 weight percent of polypropylene, and the polyethylene resin comprises 60 to 98 weight percent of a linear low-density polyethylene and 40 to 2 weight percent of a branched low-density polyethylene.
2. A polyolefin resin composition as described in claim 1 containing 0.5 to 5 weight parts of a hardened castor oil and 0.5 to 5 weight parts of a dehydrated castor oil to 100 weight parts of the resin composition.
3. A polyolefin rein composition as described in claim 1 containing 0.5 to 5 weight parts of a liquid ethylene-olefin oligomer to 100 weight parts of the resin composition.
4. A polyolefin film made of the polyolefin resin composition as described in claim 1.
5. A polyolefin film as described in claim 4 wherein the basis weight is from 15 to 60 gm2, the tensile elongation at break per 1 gm2 in a TD direction is at least 12.5%(gm2), and the tensile strength per 1 gm2is at least 17 g25 mm(gm2).
6. A porous film prepared by stretching the polyolefin film as described in claim 4.
7. A porous film as described in claim 6 wherein the basis weight is from 15 to 50 gm2 and the vapor permeability is at least 500 gm224 hr.
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 process for synthesising () 2-amino-N-2-(2,5-dimethoxyphenyl)-2-hydroxyethylacetamide monohydrochloride which comprises the steps of:
(a) reacting 1-(2,5-dimethoxyphenyl)-2-bromoethanone with hexamine in tetrahydrofuran water solvent system to produce 1-(2,5-dimethoxyphenyl)-2-amino ethanone;
(b) acylating said 1-(2,5-dimethoxyphenyl)-2-aminoethanone with haloacetylchloride and sodium acetate in acetone water solvent medium to produce 2-chloro-N-(-oxo-2,5-dimethoxyphenyl) acetamide;
(c) subjecting said acetamide obtained in step (b) to nucleophilic azidation with sodium azide in acetone medium;
(d) subjecting said 2-azido-N-(-oxo-2,5,-dimethoxyphenyl) acetamide to selective reduction of the carbonyl group by treating with sodium borohydride and subsequently reducing the azide group with stannous chloride to obtain 2-amino-N–2-(2,5-dimethoxyphenyl)-2-hydroxyethylacetamide which is converted into the corresponding monohydrochloride by treatment with concentrated hydrochloric acid and recovered from the reaction mixture in a known manner.
2. The process as claimed in claim 1 wherein the haloacetyl chloride used in step (b) is chloroacetyl chloride and the reaction is carried out at 0 C.
3. The process as claimed in claims 1 and 2 wherein potassium iodide is added to the reaction mixture in step (c) and the reaction mixture is refluxed at a temperature of about 60 C.
4. The process as claimed in claims 1 to 3 wherein the selective reduction in step (d) is carried out in a protic solvent such as methanol.
5. The process as claimed in claim 1 wherein conversion to monohydrochloride is effected in situ by adding concentrated hydrochloric acid in the presence of an aprotic solvent.
6. () 2-Amino-N-2-(2,5-dimethoxyphenyl)-2-hydroxyethylacetamide whenever prepared by a process as claimed in claim 1.
7. The process as claimed in claim 2 wherein potassium iodide is added to the reaction mixture in step (c) and the reaction mixture is refluxed at a temperature of about 60 C.
8. The process as claimed in claim 2 wherein the selective reduction in step (d) is carried out in a protic solvent such as methanol.
9. The process as claimed in claim 3, wherein the selective reduction in step (d) is carried out in a protic solvent such as methanol.
10. () 2-Amino-N-2-(2,5-dimethoxyphenyl)-2-hydroxyethylacetamide whenever prepared by a process as claimed in claim 2.
11. () 2-Amino-N-2-(2,5-dimethoxyphenyl)-2-hydroxyethylacetamide whenever prepared by a process as claimed in claim 3.
12. () 2-Amino-N-2-(2,5-dimethoxyphenyl)-2-hydroxyethylacetamide whenever prepared by a process as claimed in claim 4.
13. () 2-Amino-N-2-(2,5-dimethoxyphenyl)-2-hydroxyethylacetamide whenever prepared by a process as claimed in claim 5.