Humidity resistant matches and process for the manufacture thereof
AssigneeBryant & May Limited
InventorsAlbert F. Lanham, Michael G. C. Cox, Richard H. Etheridge
Life of this patent
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Abstract
In accordance with the invention humidity resistant matches having excellent and improved humidity resistance as well as excellent strike sensitivity are provided using a polyacrylic or substituted polyacrylic acid as the binder and zinc oxide as the filler, or as at least one of the components of the filler.
Claims18
A process for the manufacture of humidity resistant matches which comprises forming a bulb of an aqueous match head composition on the end of a match splint, and drying the bulb to form the match head, said compostion comprising a mixture of potassium chlorate, filler, combustible material and a water-soluble or water-dispersible binder therefor, characterised in that the aqueous match head composition comprises, as said binder, a water-soluble or water-dispersible salt of a polyacrylic or substituted polyacrylic acid with ammonia or a volatile amine and as said filler, or as a component thereof, zinc oxide.
A process according to any one of the preceding claims, characterised in that the polyacrylic or substitued polyacrylic acid salt is present in the aqueous match head composition in an amount of from 3-7% by weight, based on the dry weight of the composition.
A process according to any one of the preceding claims, characterised in that there is also present in the match head composition a water-soluble or water-dispersible cohesion promoting agent.
A humidity resistant match comprising a match splint and a head formed thereon from a match head composition ignitable by striking on a surface and comprising a filler, potassium chlorate, a combustible material and a binder therefor, characterised in that the filler is or comprises zinc oxide and the binder is a polyacrylic or substituted polyacrylic acid.
Dependencies are inferred from the claim text.