US4076643A — Pre-mixes intended to be added to detergent powde…

Claim 1

Independent Claim 108 words

In a free-flowing pre-mix intended to be post-added to detergent or washing powders, the improvement wherein the pre-mix consists of particles which consist essentially of, in the form of a water-soluble salt, a linear or branched hydroxycarboxylic polymer or copolymer, the main chain of which contains essentially carbon and carries carboxyl and hydroxyl groups in the respective proportion of 1:10 and 20:1, and one or more surface-active agents which are liquid or paste-like at a temperature below 180° C, and supported by said polymer or copolymer, the amount of said surface-active agent being from about 20% to 120% by weight of the amount of said polymer or copolymer.

Claim 2

Dependent Claim 108 words

In a free-flowing pre-mix intended to be post-added to detergent or washing powders, the improvement wherein the pre-mix consists of particles which consist essentially of, in the form of a water-soluble salt, a linear or branched hydroxycarboxylic polymer or copolymer, the main chain of which contains essentially carbon and carries carboxyl and hydroxyl groups in the respective proportion of 1:10 and 20:1, and one or more surface-active agents which are liquid or paste-like at a temperature below 180° C, and supported by said polymer or copolymer, the amount of said surface-active agent being from about 20% to 120% by weight of the amount of said polymer or copolymer.

Claim 3

Dependent Claim 23 words

Pre-mix according to claim 1, wherein the ratio of carboxyl to hydroxyl groups of the polymer or copolymer is between 1:2 and 16:1.

Claim 4

Dependent Claim 22 words

Pre-mix according to claim 1, wherein the ratio of carboxyl to hydroxyl groups of the polymer or copolymer is equal to 1.

Claim 5

Dependent Claim 16 words

Pre-mix according to claim 1, wherein the hydroxycarboxylic polymer is a water-soluble salt of poly-α-hydroxyacrylic acid.

Claim 6

Dependent Claim 24 words

Pre-mix according to claim 1, wherein the surface-active agent is a non-ionic surface-active agent or an anionic or amphoteric surface-active agent which is heat-sensitive.

Claim 7

Dependent Claim 14 words

Pre-mix according to claim 1, wherein the pre-mix is in the form of granules.

Claim 8

Dependent Claim 17 words

Pre-mix according to claim 1, wherein the hydroxycarboxylic polymer is a water-soluble sodium salt of poly-α-hydroxyacrylic acid.

Claim 9

Dependent Claim 110 words

In a free-flowing solid pre-mix intended to be post-added to detergent or washing powders, consisting of solid particles and one or more surface-active agents which are liquid or paste-like at a temperature below 180° C and supported by said solid particles, the improvement wherein the solid particles consist of particles, in the form of a water-soluble salt, of a linear or branched hydroxycarboxylic polymer or copolymer, the main chain of which contains essentially carbon and carries carboxyl and hydroxyl groups in the respective proportion of 1:10 to 20:1, the amount of said surface-active agent being from about 20% to 120% by weight of the amount of said polymer or copolymer.

Claim 10

Dependent Claim 110 words

In a free-flowing solid pre-mix intended to be post-added to detergent or washing powders, consisting of solid particles and one or more surface-active agents which are liquid or paste-like at a temperature below 180° C and supported by said solid particles, the improvement wherein the solid particles consist of particles, in the form of a water-soluble salt, of a linear or branched hydroxycarboxylic polymer or copolymer, the main chain of which contains essentially carbon and carries carboxyl and hydroxyl groups in the respective proportion of 1:10 to 20:1, the amount of said surface-active agent being from about 20% to 120% by weight of the amount of said polymer or copolymer.

Claim 11

Dependent Claim 22 words

Detergent or washing powders prepared by the post-addition of a pre-mix according to claim 1 to a detergent powder prepared by spray-drying.

Claim 12

Dependent Claim 83 words

Process for the manufacture of a free-flowing pre-mix of particles intended to be post-added to detergent or washing powders, consisting essentially of mixing a water-soluble salt of a linear or branched hydroxycarboxylic polymer or copolymer, the main chain of which contains essentially carbon and carries carboxyl and hydroxyl groups in the respective proportions of 1:10 to 20:1, with one or more surface-active agents which are liquid or paste-like at a temperature below 180° C to form a mixture, and then granulating the mixture.

Claim 13

Dependent Claim 83 words

Process for the manufacture of a free-flowing pre-mix of particles intended to be post-added to detergent or washing powders, consisting essentially of mixing a water-soluble salt of a linear or branched hydroxycarboxylic polymer or copolymer, the main chain of which contains essentially carbon and carries carboxyl and hydroxyl groups in the respective proportions of 1:10 to 20:1, with one or more surface-active agents which are liquid or paste-like at a temperature below 180° C to form a mixture, and then granulating the mixture.

Claim 14

Dependent Claim 31 words

The process according to claim 10, wherein during said mixing, 0.1 to 30% of the total weight of a binder is mixed with the surface-active agent and said polymer or copolymer.

Claim 15

Dependent Claim 11 words

The process according to claim 10, wherein the binder comprises water.

Claim 16

Dependent Claim 76 words

Process for the manufacture of a free-flowing premix of particles intended to be post-added to detergent or washing powders, consisting essentially of mixing granules of a water-soluble salt of a linear or branched hydroxycarboxylic polymer or copolymer, the main chain of which contains essentially carbon and carries carboxyl and hydroxyl groups in the respective proportion of 1:10 and 20:1, with one or more surface-active agents which are liquid or paste-like at a temperature below 180° C.

Claim 17

Dependent Claim 76 words

Process for the manufacture of a free-flowing premix of particles intended to be post-added to detergent or washing powders, consisting essentially of mixing granules of a water-soluble salt of a linear or branched hydroxycarboxylic polymer or copolymer, the main chain of which contains essentially carbon and carries carboxyl and hydroxyl groups in the respective proportion of 1:10 and 20:1, with one or more surface-active agents which are liquid or paste-like at a temperature below 180° C.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1981-02-27	1981-08-29	1982-02-28	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1985-02-27	1985-08-29	1986-02-28	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1989-02-27	1989-08-29	1990-02-28	$7700.00	Window Closed / Lapsed

Pre-mixes intended to be added to detergent powders by post-addition

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