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| Blended latex binder for exterior paints with wet primed adhesion |
| OF THE INVENTION The latexes which are used to make the blends of this invention can be classified ... |
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| Pigment dispersant for aqueous paints |
| The most important ingredients of the pigment paste are the pigment itself, the dispersant and the ... |
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| Granule producing and/or processing apparatus and method |
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| Primer compositions |
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| Analgesic oxazolopyridine compounds |
| We claim: 1. A compound selected from those of formula (I): ##STR31## in which: X, Y, Z and T each ... |
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| Tetrazolyl-(phenoxy and phenoxyalkyl)-piperidinylpyridazines as antiviral agents |
| INCLUSIVE OF PREFERRED EMBODIMENTS As used herein the term halogen means fluorine, chlorine, ... |
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| Preparation of polymeric blend stock |
| OF THE INVENTION The polymeric components employed in the preparaton of the blend stock of the ... |
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| Process for coating an object with a continuous coating of plastics film |
| What is claimed is: 1. A process for coating an object with a continuous coating of plastics film ... |
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| Multicomponent polymer compositions |
| OF THE INVENTION The olefin polymer included in the compositions of the invention will be either a ... |
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Production of non-foaming aqueous suspensions of polyethylene or polypropylene fibrids
| Details |
Inventors: Sander, Bruno; Bonitz, Eckhard; Berbner, Heinz; Hoffmann, Manfred;
Assignee: BASF Aktiengesellschaft (Ludwigshafen (Rhine), DT)
Primary Examiner: Czaja; Donald E.
Assistant Examiner: Woodberry; Edward
Attorney, Agent or Firm: Johnston, Keil, Thompson & Shurtleff
Aqueous suspensions of polyolefin fibrids are prepared. To avoid foam formation and improve fiberbonding, small amounts of anionic agents are added to the suspensions. The suspensions are suitable for the manufacture of paper-like or textile-like web structures distinguished by very good fiber bonding and good initial wet strength. |
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DETAILED DESCRIPTION We claim: 1.
A process for the manufacture of non-foaming aqueous suspensions of polyolefin fibrids by dispersing polyethylene fibrids or polypropylene fibrids in water in the presence of a dispersing agent, said fibrids having a specific surface area of 1-150 m.
sup.
2 /g, the improvement wherein the dispersing agent used consists of from 0.
1 to 2.
0% by weight, based on the dry weight of the fibrids, of an ammonium salt of a copolymer of styrene and acrylic acid, said copolymer having a styrene to acrylic acid molar ratio of 1.
6:1.
2.
A process as claimed in claim 1, said ammonium salt having a viscosity of a 20% aqueous solution thereof at 20.
degree.
C.
of 2,500 centipoise.
3.
A process as claimed in claim 1 wherein said fibrids are polyethylene fibrids in which the polyethylene has a density between 0.
915 and 0.
965 g/cm.
sup.
3 and a melt index of 0.
01 to 100 g/10 min.
as determined according to ASTM D 1238-65 T at 190.
degree.
C under a load of 2.
16 kg.
4.
A process as claimed in claim 1 wherein said fibrids are polypropylene fibrids in which the polypropylene has an intrinsic viscosity of from 1.
5 to 8 dl/g, as measured at 130.
degree.
C in decalin.
Description:
This application discloses and claims subject matter described in German Patent Application P 23 52 190.
6, filed Oct.
18, 1973, which is incorporated herein by reference.
This invention relates to a process for the manufacture of aqueous suspensions of polyolefin fibrids by dispersing said fibrids in water in the presence of a dispersing agent.
It is well known that polyolefin fibrids, which are hydrophobic by nature, may be dispersed in water when surface-active substances are used as dispersing agents.
Such surfactants are generally composed of hydrophilic and hydrophobic segments, the hydrophilic properties being produced by polyethylene oxide units.
The preferably terminal hydrophobic segments comprise for example polypropylene oxide units, alkyl phenol radicals, urethane groupings and fatty alcohol radicals
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Adhesives and Rubbers 
