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Class 525/56 - Polyvinyl alcohol


Subclass of Class 525 - Synthetic resins or natural rubbers -- part of the class 520 series
Definition: Subject matter involves polymeric products containing vinyl
No. of patents: 330
Last issue date: 04/19/2011


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NumberTitleIssue Date
3991109Diacyl peroxy compounds
I. A novel class of compounds Xn --Rp --Ym where R is a 2-4 valence aliphatic, cycloaliphatic or aromatic radical, X is an acylating function; Y is a peroxy containing group and n and m are each equal to 1-2 and p is at le...
11/09/1976
3985690Enzyme separation
A reactive matrix comprises a co-enzyme chemically attached to a water insoluble organic polymeric support material. The reactive matrix may be used in a process for the separation of mixtures containing a plurality of enzymes....
10/12/1976
3967922Granular dyestuff preparations based on polyvinylalcohol as the carrier
Pulverulent or granular dyestuff preparations containing water-soluble dyestuffs and polyvinyl alcohol are suitable for the preparation of concentrated dyestuff solutions in water, water-soluble organic solvents or in mixtures thereof....
07/06/1976
3959242Silane grafted poly(vinyl alcohol) film
A thermoplastic composition suitable as a mold release surface for preparing cast articles which comprises a silane grafted poly(vinyl alcohol) prepared by the method which comprises incrementally reacting a selected silane with the poly(vinyl alcohol) ch...
05/25/1976
3948866Polymerization with the aid of macromolecule having both a monomer soluble portion and suspension soluble portion
A process for the suspension polymerization of ethylenically unsaturated monomers -- particularly for the preparation of water-soluble polymers -- wherein a liquid monomer phase is polymerized while suspended in a liquid organic suspending medium in the p...
04/06/1976
3943150Salt of b-diethylaminoethyl ester of p-aminobenzoic acid with acetal of polyvinyl alcohol and glyoxalic and method of preparing same
A salt of ଲ-diethylaminoethyl ester of p-aminobenzoic acid with the acetal of polyvinyl alcohol and glyoxalic acid which has the formula: ##EQU1## wherein n is a degree of polymerization within the range of from 100 to 1,200; x is a degree of s...
03/09/1976
3941750Polyvinylpyrenal--an intrinsic photoconductor and active matrix polymer
A polyvinylpyrenal copolymer obtained by condensing the corresponding aromatic aldehyde with a copolymer of vinyl alcohol and having a number average molecular weight of at least 5,000. Also included are photoconductive members utilizing such material as ...
03/02/1976
3934587Disposable articles having a water-permeable and water-repellent surface
A novel material is disclosed and a process and apparatus for making the same, which process comprises reacting one side of a solid sheet or film of a polymeric compound containing reactable hydroxyl or amine groups with a vapor phase mixture of acid chlo...
01/27/1976
3933746Photopolymerizable polymers having anhydride-containing groups
The polymer herein described comprises an anhydride-containing group represented by the structure: ##EQU1## wherein R is a residue of a dibasic acid selected from the group consisting of aliphatic dicarboxylic acids and aromatic dicarboxylic aci...
01/20/1976
3932564Electroconductive resins and process of preparation
Electroconductive cationic resins prepared by the reaction of a 1,4-dihaloalkene-2 compound and a di(tertiary amine). The resins are quaternary ammonium compounds. They may be prepared in aqueous medium. They may be blended with polyvinyl alcohol and the ...
01/13/1976
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