US4988369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agglomerated abrasive material, compositions comprising same, and processes for its manufacture
Assignee: Chesebrough Ponds Inc
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Filing: 1988-08-09
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Granted: 1991-01-29
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Expires: 2008-08-09
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
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:11
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: 9
Claim 1
Independent Claim
118 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 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 into particles comprising said filler agglomerated and coated by said binding agent.
Claim 2
Dependent Claim
118 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 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 into particles comprising said filler agglomerated and coated by said binding agent.
Claim 3
Dependent Claim
27 words
A process as claimed in claim 1 wherein 50 to 80% by weight of the total amount of the inorganic filler is introduced in said first step.
Claim 4
Dependent Claim
26 words
A process as claimed in claim 1 wherein said first step is carried out at a temperature within the range from 170° C. to 250° C.
Claim 5
Dependent Claim
46 words
A process as claimed in claim 1 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 6
Dependent Claim
23 words
A process as claimed in claim 1 wherein said first step includes incorporation into the melt of a volatile liquid as blowing agent.
Claim 7
Dependent Claim
21 words
A process as claimed in claim 1 wherein said first step includes incorporation of a gaseous blowing agent into the melt.
Claim 8
Dependent Claim
25 words
A process according to claim 4 wherein the amount of said blowing agent is from 0.5 to 15% by weight of the polymeric binding agent.
Claim 9
Dependent Claim
25 words
A process according to claim 5 wherein the amount of said blowing agents is from 0.5 to 15% by weight of the polymeric binding agent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |