Waterproof, breathable rainwear and waterproof articles of foam plastic
US5562977A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1994 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Apr 26, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/40
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed is the use of a laminate of a textile material covered with a copolyetherester film having a water vapor transmission rate of at least 1000 g/m.sup.2 /day for the manufacture therefrom of waterproof rainwear, shoes, tents, and mattress covers, and for the complete covering therewith of molded articles of foam rubber for use in chairs or mattresses, the copolyetherester being composed of a plurality of recurrent intralinear long-chain ester units and short-chain ester units which are randomly joined head-to-tail through ester bonds, with at least 20 wt. % of the long-chain ester units being prepared from a long-chain glycol having a carbon to oxygen ratio in the range of 2.0 to 2.4, which glycol constitutes 15-45 wt. % of the copolyetherester, and with at least 70 wt. % of the short-chain ester units consisting of butylene naphthalate units constituting 20-80 wt. % of the copolyetherester. Compared with the known polyetherester-textile laminates, the claimed laminates exhibit surprisingly low permanent plastic deformation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.