EXOTHERMIC COMPOSITION CONTAINING A METAL OXIDE AND ACID OR ACID SALTS

• US 3,475,239 A
• Filed: 11/04/1968
• Issued: 10/28/1969
• Est. Priority Date: 11/04/1968
• Status: Expired due to Term

• Current Assignee: Ameron International Corporation (NOV, Inc.)
• Original Assignee: Fearon Robert Earl, Foss Rudolph George
• Inventors: FEARON ROBERT EARL, FOSS RUDOLPH GEORGE
• Application Number:
  US04/772,991
• Time in Patent Office: 358 Days
• US Class Current: 44/251
• CPC Class Codes: B29C 65/022 Particular heating or welding methods not otherwise provided for
• CPC Class Codes: B29C 65/4835 Heat curing adhesives
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/5221 for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
• CPC Class Codes: B29C 66/52241 with two right angles, e.g. for making T-shaped pieces
• CPC Class Codes: B29C 66/5229 involving the use of a socket
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/7212 characterised by the composition of the fibres
• CPC Class Codes: B29C 66/91221 of the parts to be joined
• CPC Class Codes: B29C 66/91411 of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
• CPC Class Codes: B29K 2063/00 Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2309/08 Glass
• CPC Class Codes: C09K 5/18 Non-reversible chemical reactions
• CPC Class Codes: F16L 47/02 Welded joints; Adhesive joints

Abstract

1284136 Exothermic compositions CIBA GEIGY AG 4 Nov 1969 [4 Nov1968] 54086/69 Heading C5G An exothermic composition which liberates heat on adding water consists of an alkali metal oxide or an alkaline earth metal oxide and a solid acid or an acid salt of a strong acid, or mixtures, thereof. Oxides of Ca, Ba, Sr, Na, K, or Li are preferred, and the acid may be phosphoric, sulphamic, tartaric, oxalic, or citric. Preferred salts are sodium hydrogen sulphate and potassium hydrogen sulphate. The acids may be hydrated, and a preferred acid mixture consists of a major portion of hydrated oxalic or citric acid and the remainder sulphamic acid. There should be more than enough oxide present to neutralize the acid reactant, but not more than enough to react with all the acid and all the water produced during the reaction of the acid and the oxide.

Claims