EP0101253A2
Expired / Lapsed
EP
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Water absorbing polymers
Assignee: Ciba Specialty Chemicals Water Treatments Ltd
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Filing: 1983-08-03
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Granted: —
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Expires: 2003-08-03
Abstract
Abstract Substantially non-ionic polyacrylamide cross linked with a low amount of cross linking agent is used as an additive for a plant growth medium.
Inventors
- 👤 John Bernard Clarke
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 19:27
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18; C09K17/20; C09K17/22; A; A01; A01G; A01G24/00; A01G24/10; A01G24/18; A01G24/30; A01G24/35; A01G24/40; A01G24/42; Y; Y10; Y10S; Y10S71/00; Y10S71/903
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
46 words
A composition for use as an additive to a plant growth medium and which is a particulate acrylamide polymer characterised in that the polymer is a substantially non-ionic polyacrylamide cross linked by from about 10 to about 600 ppm, by weight polymer, of cross linking agent.
Claim 2
Dependent Claim
46 words
A composition for use as an additive to a plant growth medium and which is a particulate acrylamide polymer characterised in that the polymer is a substantially non-ionic polyacrylamide cross linked by from about 10 to about 600 ppm, by weight polymer, of cross linking agent.
Claim 3
Dependent Claim
20 words
A composition according to claim 1 in which the amount of cross linking agent is from 20 to 100 ppm.
Claim 4
Dependent Claim
18 words
A composition according to claim 1, in which the amount of cross linking agent is about 50 ppm.
Claim 5
Dependent Claim
15 words
A composition according to any preceding claim in which the cross linking agent is methylenebisacrylamide.
Claim 6
Dependent Claim
18 words
A composition according to any preceding claim in which the particles are from 0.05 to 1-mm in size.
Claim 7
Dependent Claim
20 words
A composition according to any preceding claim in which the particles are mainly from 0.05 to 0.5 mm in size.
Claim 8
Dependent Claim
16 words
A plant growth medium into which has been incorporated a composition according to any preceding claim.
Claim 9
Independent Claim
27 words
A method in which plants are grown in a plant growth medium into which has been incorporated a composition according to any of claims 1 to 7.
References Cited (Backward Citations)
No citation records indexed.
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