Products Research & Chemical

Prc De Soto International, Inc.

Other

Gregory, George

Singh, Hakam

Hakam Singh

Jonathan D Zook

Chandra B Rao

Susan E DeMoss

David W Jordan

Ahmed Sharaby

Jack W Hutt

Lester Morris

George Robert Gregory

Morris E Williams

George Gregory

Sealant and potting formulations are provided which are prepared from components including ungelled mercapto-terminated polymer(s) prepared by reacting reactants comprising polyvinyl ether monomer(s) and polythiol material(s); curing agent(s) reactive with a mercapto group of the mercapto-terminated polymer; and additive(s) selected from the group consisting of fillers, adhesion promoters, plasticizers and catalysts.

Sealants and potting formulations including mercapto-terminated polymers produced by the reaction of a polythiol and polyvinyl ether monomer

Sealant and potting formulations are provided which includes ungelled polymer(s) prepared from components including polyvinyl ether monomer(s) and polythiol material(s), the ungelled polymer being terminated with functional groups other than a thiol group; curing agent(s); and at least one additive selected from the group consisting of fillers, adhesion promoters, plasticizers and catalysts.

Sealants and potting formulations including polymers produced by the reaction of a polythiol and polyvinyl ether monomer

Palatable compositions are disclosed which are useful as salt substitutes comprising calcium ascorbate as the major component in combination with minor constituents including sodium chloride, sodium ascorbate, free ascorbic acid and potassium chloride. The palatable compositions are characterized by an appealing salt-like taste and have a pH in aqueous solution preferably in the range of about 4 to about 5.

Palatable low salt substitutes

A liquid polymer which is rapidly curable, at room temperature, to a solid hydrolytically stable elastomer having high tensile and tear strengths, said liquid polymer having the formula: ##STR1## wherein R is a liquid polymeric backbone selected from the group consisting of polyether and polythioether, said backbone having a number average molecular weight of at least 1,500 and having no carboxyl or hydroxyl groups; R.sup.1 is lower alkyl, R.sup.2 is lower alkyl, R.sup.3 is a divalent organic radical having no sulfur atoms, R.sup.4 is alkylene of from 3 to 6 carbon atoms, and which separates the oxygen atom from X by at least 3 carbon atoms, X is sulfur or --S--R.sup.5 --S-- wherein R.sup.5 is alkylene having from 2 to 12 carbon atoms, alkylene thioether of from 4 to 12 carbon atoms or hydrocarbon ether of from 4 to 20 carbon atoms, p is 2 to 4, m is 1 to 3, n is 0 to 2 and the sum of m and n is 3. There is also disclosed a method for curing such liquid polymers.

Silane terminated liquid polymers

Method of producing mercaptan terminated polymers with increased

A liquid polymer composition curable to a solid elastomer having good thermal stability which contains a mercaptan terminated disulfide polymer of the formula HS(RSS).sub.m R'SH wherein R is --C.sub.2 H.sub.4 --O--CH.sub.2 O--C.sub.2 H.sub.4 --; R' is a member selected from the group consisting of alkyl of from 2 to 12 carbon atoms; alkyl thioether of from 4 to 20 carbon atoms; alkyl ether of from 4 to 20 carbon atoms and one oxygen atom; alkyl ether of from 4 to 20 carbon atoms and from 2 to 4 oxygen atoms each of which is separated from the other by at least 2 carbon atoms, alicyclic of from 6 to 12 carbon atoms and aromatic lower alkyl; and the value of m is such that mercaptan terminated disulfide polymer has a molecular weight of between 1,000 to about 4,000. The method includes cleaving a polymer having disulfide linkages with an organic dimercaptan in the presence of an organic amine.

Modified disulfide polymer composition and method for making same from

Liquid polythioethers containing no oxygen in the polymeric backbone and a method for producing same which includes condensing an organic compound having primary mercaptan group with an organic compound having secondary hydroxyl group beta to a sulfur atom.

Thioethers having a high sulfur content and method therefor

A non-crystallizing, water, solvent, fuel and temperature resistant liquid polythioether having two to four terminating radicals which do not substantially reduce the water, solvent, fuel and temperature resistance and a water, solvent, fuel and temperature resistant polymeric backbone having repeating units of the formula: ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is hydrogen or lower alkyl providing that a sufficient number of R.sub.1, R.sub.2, R.sub.3 and/or R.sub.4 are lower alkyl in said polymeric backbone to render said backbone non-crystallizing; X is a divalent organic radical selected from --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --S--CH.sub.2 --CH.sub.2 -- or --CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CH.sub.2 --; n is 8 to 200; and p is 0 or 1.

Growing community of inventors

Bradbury, CA, United States of America

Hakam Singh