This invention provides processes for preparing fiber or film comprising a polyurethane and layers delaminated from a lamellar clay, said layers being dispersed in said polyurethane. Fiber and film produced by the processes of the present invention exhibit reduced tack and an increased ability to affix at least one dye.
This invention provides processes for preparing fiber or film comprising a polyurethane and layers delaminated from a lamellar clay, said layers being dispersed in said Polyurethane. Fiber and film produced by the processes of the present invention exhibit reduced tack and an increased ability to affix at least one dye.
The present invention is directed towards a process for the recycling of polyesters comprising the steps of blending a starting polymer that is to be recycoled with an alkylene diol to form a blend, melting the blend and holding the melt blend under conditions of a first residence time, first temperature and shear to produce a cracked polymer. The cracked polymer blend can then be filtered, cooled and held under conditions such that solid phase polymerization takes place until a desired molecular weight is achieved.
Ethylene Copolymers With Enhanced Fire Resistant Properties
E. I. Du Pont de Nemours and Company - Wilmington DE
International Classification:
C09K 2100 H01B 700 C09D 516 C09D 518
US Classification:
252606
Abstract:
The addition of certain phosphate esters causes ethylene copolymers containing CaCO. sub. 3 and/or Ca-Mg/CO. sub. 3 and alumina trihydrate to have lower swell on burning and to have smaller and more uniform cell formation in the ceramic ash than compositions without such esters present.
Leonard Edward Raymond Kosinski - Chadds Ford PA Govindasamy Paramasivam Rajendran - Newark DE Robert Rex Reitz - West Chester PA
Assignee:
E. I. du Pont de Nemours and Company - Wilmington DE
International Classification:
D01F 600 D01F 672
US Classification:
428364
Abstract:
This invention provides a fiber comprising a polyurethaneurea and layers delaminated from a lamellar clay, said layers being dispersed in said polyurethaneurea.
Ethylene Copolymers With Enhanced Fire Resistant Properties
E. I. Du Pont de Nemours and Company - Wilmington DE
International Classification:
C09K 2102 C09K 2110 C09D 518
US Classification:
252609
Abstract:
The addition of melamine/formaldehyde resins causes ethylene copolymers containing CaCO. sub. 3 and alumina trihydrate to have lower swell on burning and has smaller and more uniform cell formation in the ceramic ash than compositions without such resins present.