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Liquid Purification

Hardenable-compositions

Phenolic polymer prepared from o-cresol

What is claimed is: 1. An alkylol group containing phenolic polymer of Formula I: ##STR11## wherein:...

Apparatus for increasing the pH of waste water

I claim: 1. Apparatus for increasing the pH of waste water, comprising a lime water having an ...

Method for preparing improved expanded polystyrene sheet

I claim: 1. In a process for producing microcellular expanded styrene polymer sheet by extruding a ...

Chemical-resistant wholly aromatic polyamide fiber material

OF THE INVENTION In the chemical-resistant wholly aromatic polyamide fiber material of the present ...

Epoxy resin powder including ethylene vinyl acetate

I claim: 1. A homogeneous free-flowing powder which is shelf-stable and when heated to 185.degree.-2...

Oxygen barrier laminate films including a polyalkylene carbonate adhesive

What is claimed is: 1. In a laminate structure comprising a base layer and a polycarbonate layer ...

Device for fluidizing and distributing powder

What is claimed is: 1. A device for fluidizing and distributing a powder in suspension in a carrier ...

Ceramic forming process

OF THE INVENTION INCLUSIVE OF THE PREFERRED EMBODIMENTS The invention sought to be patented ...

Method and apparatus for adding and mixing second cohesive powders in a fluidized bed blender

OF THE COMPONENTS Referring now to FIG. 3, one of the plurality of hoppers contained within the ...

Process for preparing carbon fibers elliptical in section

We claim: 1. A process for preparing a carbon fiber having an elliptical cross section and ...

Hardenable compositions

Details

Inventors: Crisp, Stephen; Wilson, Alan D.;
Assignee: National Research Development Corporation (GB2)
Primary Examiner: Bleutge; John C.
Assistant Examiner: Lilling; Hebert
Attorney, Agent or Firm: Jacobs & Jacobs

Compositions which are hardenable in the presence of water to form a poly(carboxylate) cement contain a metal salt which accelerates the setting of the composition.

DETAILED DESCRIPTION We claim: 1.
A hardenable composition which comprises (i) a poly(carboxylic acid) selected from the group consisting of homopolymers and copolymers of unsaturated aliphatic carboxylic acids or precursor thereof that is converted to said poly(carboxylic acid) on hydrolysis thereof; (ii) a particulate ion-leachable silicate or aluminosilicate glass reactable with (i) in the presence of water to set to a hardened composition; and (iii) an inorganic metal salt which accelerates the setting of the composition selected from the group consisting of a silver (I) salt, a barium salt and a multivalent metal salt, the cation of which has a standard electrode potential E.
sub.
ox.
sup.
o less than 2.
6 volts.
2.
A hardenable composition according to claim 1 wherein (iii) comprises a silver (I) salt or a barium salt.
3.
A hardenable composition according to claim 2 wherein (iii) comprises silver nitrate, barium chloride or barium fluoride.
4.
A hardenable composition according to claim 1 wherein (i) comprises an acrylic acid homopolymer or copolymer of acrylic acid with one or more of aconitic, fumaric, itaconic, maleic, mesaconic, methacrylic, muconic, or tiglic acid.
5.
A hardenable composition according to claim 1 wherein (iii) comprises a multivalent metal salt the cation of which has a standard electrode potential E.
sub.
ox.
sup.
o less than 2.
6 volts.
6.
A hardenable composition according to claim 5 wherein (iii) comprises a salt of aluminium, cadmium, magnesium, mercury (II), silver (II), or zirconium.
7.
A hardenable composition according to claim 6 wherein (iii) comprises a salt of aluminium, magnesium, silver (II) or zirconium.
8.
A hardenable composition according to claim 1 wherein (iii) comprises a fluoride.
9.
A hardenable composition according to claim 8 wherein (iii) comprises aluminium fluoride, magnesium fluoride, stannous fluoride, silver difluoride or zinc fluoride.
10.
A hardenable composition according to claim 1 wherein (iii) is soluble in an aqueous solution of (i)

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