| 摘要 |
Improved aerosol hair spray packages have reduced volatile organic compound emission during the useful life of the pack- ages. A hair spray composition (3, 25) is packaged in either a self-propelle d aerosol hair spray package (1) or a pump spray hair pray package (20) containing a low delivery rate discharge means (6, 23). Th e hair spray composition (3, 25) contains a combina- tion of at least two polymers in weight ratios of 99;1 to 1;99 differing in weight average molecular weight by at least 1.5, one of which is required to have a number average molecular weight of at least 100,000. This blend of polymers combines with the low delivery rate discharge means -0.2-0.38 grams per second far the self- propelled hair spray package (1) and 0.06 to 0.012 grams per pump stroke for the pump spray hair spray package (20) - to provide an atomized hair spray composition having a volume mean particle size of 60 ~ 12 microns for package (1) and 73 ~ 13 microns fo r package (20). These packages ace considerably smaller in size than conventional hair spray packages having higher discharg e rates, but provide substantially the same number of uses per container as the larger size conventional hair spray packages.</SDO AB> |
