EP0303416A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for the manufacture of an agglomerated abrasive material
Assignee: Unilever PLC
•
Filing: 1988-08-05
•
Granted: —
•
Expires: 2008-08-05
Abstract
Abstract Agglomerated abrasive material suitable for use in liquid abrasive cleaning compositions comprises inorganic filler and a polymeric binding agent selected from polyalkylenes, copolymers of polyalkylenes with each other and copolymers of polyalkylenes with up to 30% by weight of monomers containing a carboxylic acid or ester group. These agglomerates can be prepared by a process in which a melt of inorganic filler in polymeric binding agent is formed and thereafter further inorganic filler is added to the melt to raise the weight ratio of inorganic filler to binding agent above a level at which the melt spontaneously crumbles.
Inventors
- 👤 Galip Akay
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 20:09
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3749; C11D17/00; C11D17/0008; C11D17/0013; C11D3/02; C11D3/12; C11D3/14; C11D3/3757; C11D3/3765
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
48 words
Agglomerated abrasive material comprising an inorganic filler and a polymeric binding agent selected from the group consisting of the polyalkylenes, the copolymers thereof with each other, the copolymers thereof with up to 30% by weight of monomers containing a carboxylic acid or ester group, and the mixtures thereof.
Claim 2
Dependent Claim
48 words
Agglomerated abrasive material comprising an inorganic filler and a polymeric binding agent selected from the group consisting of the polyalkylenes, the copolymers thereof with each other, the copolymers thereof with up to 30% by weight of monomers containing a carboxylic acid or ester group, and the mixtures thereof.
Claim 3
Dependent Claim
33 words
Agglomerated abrasive material as claimed in claim 1 wherein the polymeric binding agent has a density within the range from about 0.94 to 0.96 g/cm³ and a molecular weight in excess of 20,000.
Claim 4
Dependent Claim
37 words
Agglomerated abrasive material as claimed in claim 1 wherein the polymeric binding agent is selected from the group consisting of high-density polyethylenes, low-density polyethylenes, polypropylenes, polybutylenes, copolymers of ethylene and propylene and copolymers of ethylene and isobutylene.
Claim 5
Dependent Claim
59 words
Agglomerated abrasive material as claimed in claim 1 wherein the polymeric binding agent is selected from the group consisting of copolymers of at least one monomer selected from the group consisting of ethylene, propylene and isobutylene and a further monomer selected from the group consisting of vinyl acetate, acrylic acid, methacrylic acid, and methyl and ethyl acrylates and methacrylates.
Claim 6
Dependent Claim
28 words
Agglomerated abrasive material as claimed in any of the preceding claims wherein the inorganic filler has a particle size in the range from 7 nm to 10 µm.
Claim 7
Dependent Claim
44 words
Agglomerated abrasive material as claimed in any of the preceding claims wherein the inorganic filler is selected from the group consisting of limestone, chalk, marble, dolomites, aragonites, feldspars, silica, ground glass, hard silicate minerals, silicon carbide, pumice, aluminas, gypsum, clays, kaolins, and mixtures thereof.
Claim 8
Dependent Claim
49 words
Agglomerated abrasive material as claimed in any of the preceding claims wherein the amount of filler is in the range of 10 to 97% by weight of the agglomerate and the amount of polymeric binding agent is in the range from 3 to 90% by weight of the agglomerate.
Claim 9
Dependent Claim
46 words
Agglomerated abrasive material as claimed in claim 7 wherein the amount of filler is in the range of 80 to 92% by weight of the agglomerate and the amount of polymeric binding agent is in the range from 8 to 20% by weight of the agglomerate.
Claim 10
Dependent Claim
20 words
A scouring cleaning composition comprising a agglomerated abrasive material according to any of the preceding claims and a detergent surfactant.
Claim 11
Dependent Claim
111 words
A process for the manufacture of agglomerated abrasive material, the process comprising a first step of forming a continuous melt of an inorganic filler material and a polymeric binding agent selected from the group of the high molecular weight polyalkylenes, the copolymers thereof with each other, the copolymers thereof with up to 30% by weight of monomers containing a carboxylic acid or ester group, and the mixtures thereof, and optionally a blowing agent, and a second step of adding further inorganic filler to the continuous melt in a sufficient amount to raise the weight ratio of inorganic filler to polymeric binding agent above a level at which the melt spontaneously crumbles.
Claim 12
Dependent Claim
111 words
A process for the manufacture of agglomerated abrasive material, the process comprising a first step of forming a continuous melt of an inorganic filler material and a polymeric binding agent selected from the group of the high molecular weight polyalkylenes, the copolymers thereof with each other, the copolymers thereof with up to 30% by weight of monomers containing a carboxylic acid or ester group, and the mixtures thereof, and optionally a blowing agent, and a second step of adding further inorganic filler to the continuous melt in a sufficient amount to raise the weight ratio of inorganic filler to polymeric binding agent above a level at which the melt spontaneously crumbles.
Claim 13
Dependent Claim
27 words
A process as claimed in claim 10 wherein 50 to 80% by weight of the total amount of the inorganic filler is introduced in said first step.
Claim 14
Dependent Claim
27 words
A process as claimed in claim 10 or claim 11 wherein said first step is carried out at a temperature within the range from 170°C to 250°C.
Claim 15
Dependent Claim
53 words
A process as claimed in claim any one of the claims 10 to 12 wherein said first step includes addition of a blowing agents selected from the group consisting of carbonate and bicarbonate salts, ethylene carbonate, organic and inorganic nitrites, aromatic and aliphatic azo compounds, hydrazine salts, hydrazides, and carbonyl and sulphonyl azides.
Claim 16
Dependent Claim
23 words
A process as claimed in claim 10 wherein said first step includes incorporation into the melt of a volatile or gaseous blowing agent.
Claim 17
Dependent Claim
28 words
A process according to claim 13 or claim 14 wherein the amount of said blowing agent is from 0.5 to 15% by weight of the polymeric binding agent.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.