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Publication numberUST896051 I4
Publication typeGrant
Publication dateMar 28, 1972
Filing dateNov 12, 1970
Priority dateNov 12, 1970
Publication numberUS T896051 I4, US T896051I4, US-I4-T896051, UST896051 I4, UST896051I4
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Zjl fxx mss mss^h disperstbzg,osi for making microporous materials
US T896051 I4
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Description  (OCR text may contain errors)

DEFENSIVE PUBLICATION Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts t Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Ofllce makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED MARCH 28, 1972 A process for forming a colloidal polymeric dispersion used in making microporous sheet material having a secant tensile modulus at elongation of about 600 p.s.i. by microblending a solution of a polymeric component and a solution of a solvent and a non-solvent for the polymeric component. The microblending being achieved in about 0.5-5 seconds in a high shear mixing zone having a shear rate of 1,000l50,000 reciprocal seconds and of a stream of a solution of a polymeric component, and particularly a linear polyurethane or a blend of a linear polyurethane and poly (vinyl chloride), at about -60 C. and of a stream of an organic solvent and non-solvent, particularly water, at about -50" C. The quantity of organic solvent being about -25% and the quantity of non-solvent being about 5-75 The temperature of the blend being thereafter reduced about 2-50 C. to form a colloidal polymeric dispersion having a non-solvent content of about 35% by weight.

' March 28, 1972 HAMLlN ETAL T896,051

PROCESS FOR FORMING COLLOIDAL POLYMERIC DISPERSIONS FOR MAKING MICROPOROUS MATERIALS Filed Nov. 12, 1970 lk J ATTORNEY

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US5284626 *Jul 9, 1992Feb 8, 1994Stranco, Inc.Mixing polymer and water uniformly at selected concentration at reduced cost
US5284627 *Aug 19, 1992Feb 8, 1994Stranco, Inc.Receptacle with impeller for agitating and shearing aqueous polymeric mixtures to efficiently dissolve and age to maximum viscosity, for waste water flocculation
US5338779 *Sep 18, 1992Aug 16, 1994Stranco, IncCirculating dilution water at high rate; forming slurry without agglomeration
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Classifications
U.S. Classification523/319, 521/62, 524/507
International ClassificationC08J3/07, C08J3/02
Cooperative ClassificationC08J3/07
European ClassificationC08J3/07