| 摘要 |
1,270,052. Coatings of fragrance-containing microcapsules. MINNESOTA MINING & MFG. CO. 8 July, 1969 [9 July, 1968], No. 34445/69. Heading B2E. [Also in Division A4] A tape has a layer comprising microcapsular shells containing oily liquid droplets of a fragrance. The backing may be of paper, which may be coated, e.g. with polyethylene or other non-woven web of natural or synthetic fibres, or a film, such as of polyester, polyethylene or polyvinyl chloride. The capsules may be attached to the substrate by means of an adhesive such as copolymers of acrylic acid esters of non-tertiary alkyl alcohol with acrylic acid, methacrylic acid, itaconic acid, acrylamide and methacrylamide. The microcapsular shells may be of urea-formaldehyde polymer. An adhesive coat may be applied to the other surface. |
