Lavatory cleansing blocks

Details Lavatory cleansing blocks Lavatory cleansing blocks

C - Chemistry, Metallurgy

11

D

134/3.3

C11D 3/60 (2006.01) C11D 3/22 (2006.01) C11D 3/37 (2006.01) C11D 3/48 (2006.01) C11D 17/00 (2006.01) C11D 1/10 (2006.01) C11D 1/12 (2006.01) C11D 1/14 (2006.01) C11D 1/18 (2006.01) C11D 1/22 (2006.01) C11D 1/29 (2006.01) C11D 1/52 (2006.01)

Patent

CA 1125620

A B S T R A C T A process for the preparation of a lavatory cleansing tablet for immersion in the cistern of a lavatory comprises forming a free-flowing particulate mixture consisting essentially of: (a) from 5 to 90% by weight of a surface active component comprising one or more organic surface active agents, especially anionic or nonionic surface active agents; (b) from 0. 5 to 75% by weight of one or more binders selected from clays and, preferably, water-soluble or water-dispersible gel-forming organic polymeric materials, especially cellulose derivatives; (c) from 0 to 20% of one or more dyestuffs; (d) from 0 to 35% by weight of a perfume component comprising a solid perfume or a liquid perfume optionally in admixture with a solid absorbent therefor; (e) a total of from 0 to 75% by weight of; (i) one or more inert water-soluble fillers, (ii) one or more water-softening or chelating agents; (iii) one or more solid water-soluble acids; (iv) one or more inert water-soluble inorganic or polymeric organic fillers (in an amount of not more than 30% by weight of the mixture); (v) one or more tablet lubricants (in an amount of not more than 30% by weight of the mixture). (f) from 0 to 20% by weight of one or more germicides, fungicides, and/or chlorine release agents; and compressing the mixture to form a tablet. The invention also provides tablets produced by such a process which tablets suitably have a weight of from 20 to 150 grams, especially from 30 to 70 grams. In another aspect the invention provides a method of cleansing a lavatory which comprises immersing in the cistern of the lavatory a tablet produced in accordance with the invention.

323860

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