摘要:
The invention provides polyurethaneurea compositions comprising poly(tetramethylene-co-ethyleneether) glycol having high number average molecular weight, from about 1900 to about 4000 Dalton. The invention further relates to the use of high number average molecular weight poly(tetramethylene-co-ethyleneether) glycol as the soft segment base material in spandex compositions. The invention also relates to new polyurethane compositions comprising poly(tetramethylene-co-ethyleneether) glycols with such high number average molecular weight, from about 1900 to about 4000 Dalton, and their use in spandex.
摘要:
The present invention provides fibers and products produced therefrom, including nonwoven webs and adhesive articles. The fibers, which can be multilayer fibers, include a polydiorganosiloxane polyurea copolymer.
摘要:
Disclosed herein are a highly uniform spandex and process for making such spandex. More particularly, the polyurethaneurea of which such spandex is prepared has both dialkylurea and cycloalkylurea ends, wherein a chain terminator composition includes a dialkylamine such as diethylamine and a cylcoalkylamine such as cyclohexylamine.
摘要:
A fiber of a polyurea wherein at least about 97 mole percent of its recurring units have the formula
AND FROM 0 TO ABOUT 3 MOLE PERCENT OF ITS RECURRING UNITS HAVE THE FORMULA
WHERE Z is a selected divalent organic radical, and at least about 69 percent of the
GROUPS HAVE BOTH
GROUPS IN THE TRANS CONFIGURATION. The fibers can be used to produce fabrics having good wash-wear and ease-of-care properties. The polymers can be prepared by reacting PACM with urea or PACM with PICM, and a small optional amount of H2N-ZNH2.
摘要:
A METHOD OF TREATING FILAMENTARY MATERIALS FORMED FROM DIFFICULTLY MELTABLE POLYMERS (AMIDE) AND PARTICULARLY TO THE STEP OF RELAXING THE SHAPED WET FORMED FILAMENT BY CONTACTING THE FILAMENT FOR A PERIOD OF TIME AND AT A TEMPERATURE SUFFICIENT TO IMPROVE THE DYE RECEPTIVITY OF THE FIBER WITH A STRONG INORGANIC ACID SHRINKING AGENT OF A SPECIFIED CONCENTRATION. MORE PARTICULARLY, AQUEOUS SOLUTIONS OF SULFURIC ACID, HYDROCHLORIC ACID AND PHOSPHORIC ACID ARE USED AS THE SHRINKING AGENT.
摘要:
A method for the production of melamine/aldehyde filaments by reacting a crystalline melamine and a solid aldehyde generating compound in a single pass reactor and extruding the resultant molten mass through a spinnerette into a reaction chamber maintained under specific temperature conditions and in the presence of air is disclosed.