 Recorder |
| Accordingly the present invention provides in a wind-instrument such as a recorder having a ... |
|
| Polymerization catalyst |
| What is claimed is: 1. A catalyst component for the polymerization of alpha-olefins comprising the ... |
|
| Method for processing soy protein and composition of matter |
| What is claimed is: 1. A method for processing soy protein from defatted soybean flakes, comprising,... |
|
| Catalyst component for polymerization of olefins |
| What is claimed is: 1. A catalyst component for the polymerization of olefins obtained by (1) ... |
|
| Olefin polymerization catalyst component |
| OF THE INVENTION The key aspect of the present invention involves the use and preparation of a ... |
|
| Process for preparing crystalline malachite |
| OF THE INVENTION The preparation of agglomerates of spheroidal masses of malachite crystals which ... |
|
| Catalyst component |
| What we claim is: 1. A catalyst component which is the product of reacting a particulate support ... |
|
| Method of supporting a catalyst on polyolefins |
| The catalysts of Harris et al, U.S. Pat. No. 4,136,058, can be used to give increased yields and ... |
|
| Zeolite activation |
| I claim: 1. A method of producing an improved catalyst, which method comprises forming a composite ... |
|
|
Strand coating method
| Details |
Inventors: Austin, Thomas H.; Primeaux, II, Dudley J.;
Assignee: Texaco Inc. (White Plains, NY)
Primary Examiner: Gallagher; John J.
Assistant Examiner:
Attorney, Agent or Firm: Park; Jack H., Priem; Kenneth R.
A process for polymer coating of narrow strands, for example, wires with a polymer, is disclosed whereby a rapidly reacting polymer formulation is sprayed onto the narrow strands whereupon it hardens in a very short period of time and another layer of strands is then placed atop the first which have now been coated with the polymer and a second layer of polymer formulation is sprayed on these strands, etc. The polymer formulation used comprises amine terminated polyethers of greater than 1500 average molecular weight, having greater than 50% of their average hydrogens in the form of amine hydrogens, a chain extender and an aromatic polyisocyanate. |
|
DETAILED DESCRIPTION We claim: 1.
A method for coating wires which comprises spraying onto a first set of wires a formulation comprising amine-terminated polyethers of greater than 1500 molecular weight having greater than 50% of their active hydrogens in the form of amine hydrogens prepared by the reductive amination of polyols, a chain extender and an aromatic polyisocyanate.
2.
A method as in claim 1 wherein additional wires are placed in proximity to the first set of wires after the spray step and an additional spray step is performed.
3.
A method as in claim 1 wherein additional wires are layered over the preceding sprayed first set of wires thus forming multiple layers of wires coated with the reacted components of the spray.
Description:
BACKGROUND OF THE INVENTION 1.
Field of the Invention This invention concerns the field of coating strands, for example, wires with a polymer.
2.
Description of Related Publications Methods for coating strands (e.
g.
wires) includes several methods, including the use of extrusion or coextrusion techniques.
In the extrusion technique, a tube is made for the wire to be coated through which the wire can later be slipped.
In coextrusion, a urethane material, for example, is applied directly to the wire being covered.
Both of these methods involve the use of heat to melt the polymer and high pressure to push the rather highly viscous material out of the extrusion orifice.
These processes have limitations in that the thickness of the urethane coating being applied must be relatively great to achieve uniformity and a smooth defect-free finish.
Therefore, such techniques are not very useful when one wants to apply a coating only a few one-thousandths of an inch thick since close tolerance between orifice and wire diameters is required.
Urethanes are also adaptable to vacuum and injection molding systems.
Again, like extrusion, high temperature melting is required and the adaptability of such techniques for small wire coating is severely limited
|
|
Adhesives and Rubbers 
