EP0235577A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Acrylic fibres having improved dispersability in viscous organic or inorganic matrices
Assignee: Montefibre SpA
•
Filing: 1987-01-30
•
Granted: —
•
Expires: 2007-01-30
Abstract
Abstract Agglomerates of acrylic fibres with improved dispersability in viscous organic or inorganic matrices constituted by at least 10 fibres bonded to each other, and wherein each fibre has a diameter shorter than 50 microns and a length higher than 3 mm.
Inventors
- 👤 Raffaele Tedesco
- 👤 Socrate Bocus
- 👤 Luigi Signoretti
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 14:20
CPC Classifications
D; D06; D06M; D06M17/00; D06M17/02; C; C04; C04B; C04B18/00; C04B18/02; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08K; C08K9/00; C08K9/08; D06M17/04; D06M17/06; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/249928; Y10T428/26; Y10T428/268; Y10T428/269; Y10T428/29; Y10T428/2904; Y10T428/2905; Y10T428/2907
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
43 words
Allgomerates of fibres having improved dispersability in viscous organic or inorganic matrices, which comprise acrylic staple fibres, each fibre having a diameter of less than 50 microns and a length of more than 3 mm, bonded to each other by an adhesion-conferring agent.
Claim 2
Dependent Claim
43 words
Allgomerates of fibres having improved dispersability in viscous organic or inorganic matrices, which comprise acrylic staple fibres, each fibre having a diameter of less than 50 microns and a length of more than 3 mm, bonded to each other by an adhesion-conferring agent.
Claim 3
Dependent Claim
41 words
Agglomerates of fibres according to claim 1, wherein the number of acrylic fibres per agglomerate is equal to or larger than: wherein L is the length of the fibres in millimetres and D is the diameter of the fibres in millimetres.
Claim 4
Dependent Claim
19 words
Agglomerates of fibres according to claim 2, wherein each agglomerate has a number of acrylic fibres larger than 10.
Claim 5
Dependent Claim
22 words
Agglomerates of fibres according to any one of the preceding claims, wherein each acrylic fibre has a length lower than 60 mm.
Claim 6
Dependent Claim
37 words
Agglomerates of fibres according to any of the preceding claims, wherein the acrylic fibres have a tenacity higher than 50 cN/tex, an initial modulus higher than 1000 cN/tex, and an elongation at break not higher than 15%.
Claim 7
Dependent Claim
130 words
Agglomerates of fibres according to any of the preceding claims, wherein the cohesion-conferring agent is soluble or swelling in water or in the alkaline solution of the inorganic matrix. fibres have the form of agglomerates, each constituted by about 300 fibres having a length of 12 mm. The content of cohesion-conferring agent is of about 3% by weight. The values of flexural strength at breakage have been: By observing the fracture sections of the samples, it has been observed that in sample A the fibres were distributed in an inhomogeneous and isles-forming pattern, with the presence of bundles of fibres not "wetted" by the matrix. In sample B, to the contrary, the fibres were distributed in a uniform pattern throughout the matrix, and were completely "wetted" by the same matrix.
Claim 8
Dependent Claim
28 words
Agglomerates of fibres according to any one of claims 1 to 5, wherein the cohesion-conferring agent is soluble in organic solvents such as ethylene glycol, styrene or toluene.
Claim 9
Dependent Claim
34 words
Agglomerates of fibres according to any of the preceding claims, wherein the cohesion-conferring agent is present in an amount of from 1 to 30%, preferably 2 to 10% by weight, relative to the fibres.
Claim 10
Dependent Claim
19 words
Viscous organic or inorganic matrices reinforced with the agglomerates of acrylic fibres according to any of the preceding claims.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.