EP0344529B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Web with finishing coating useful as coated abrasive backing
Assignee: Saint Gobain Abrasives Inc
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Filing: 1989-05-18
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Granted: 1993-06-23
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Expires: 2009-05-18
Abstract
Abstract Curl resistant backings for coated abrasives can be made by using radiation curable cloth finishing adhesives that contain hexa-acrylated urethane oligomers and beta-carboxy ethyl acrylate. Alternatively, backings containing other formulations of radiation curable cloth finishing adhesives can be made curl resistant by heating the backings, after cure of the radiation curable adhesive but before the application of any other adhesives. Heating at 121 C for at least five hours is sufficient.
Inventors
- 👤 Dhiraji H. Darjee
- 👤 Stanley J. Supkis
- 👤 Eugene Zador
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 05:01
CPC Classifications
C; C09; C09J; C09J4/00; C09J4/06; B; B24; B24D; B24D11/00; B24D11/001; B24D11/005; B24D3/00; C08; C08F; C08F290/00; C08F290/02; C08F290/06; C08F290/067; C08F290/08; C08F290/14; C08F290/147; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2098; Y10T442/2107; Y10T442/2115; Y10T442/2738
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
A process for the production of a web having a cured finish coating which coating comprises the product of a formulation containing chemical unsaturation and capable of rapid polymerization under actinic radiation, said web having an edge curl, measured by the angle between an imaginary line tangent to the extreme edge of the curled web, in an imaginary plane perpendicular to the uncurled central part of the web, and a line in the same imaginary plane that forms the central line of the flat portion of the web, when heated to a temperature between 66°C. and 121°C. that is less than 5 degrees, wherein, after application and curing of the finish coating but before the application of any adhesive coating to the web, the web is heated at a temperature of at least 121°C. for at least 5 hours.
Claim 2
Dependent Claim
31 words
A process according to claim 1, wherein said formulation containing chemical unsaturation and capable of rapid polymerization under the influence of actinic radiation comprises a hexafunctional urethane oligomer and beta-carboxyethyl acrylate.
Claim 3
Dependent Claim
28 words
A process according to claim 2, wherein said hexafunctional urethane oligomer and beta-carboxyethyl acrylate comprise at least 40 % by weight of the fluid ingredients in said formulation.
Claim 4
Dependent Claim
17 words
A process according to any of the preceding claims, wherein said fabric consists essentially of poly(ethylene terephthalate.)
Claim 5
Dependent Claim
117 words
A process according to any of the preceding claims, wherein said fabric is a stitch bonded fabric comprising: (a) an array of straight warp yarns having an array tensile strength of at least 30 dekanewtons per centimeter of fabric width; (b) an array of straight fill yarns disposed on one side of said array and having a cover factor of at least 40 %; and (c) a plurality of stitch yarns, each such yarn having a tensile breaking strength of at least 0.5 dekanewtons, formed in loops around groups of individual yarn members of said arrays of straight warp yarns and straight fill yarns, whereby the two said arrays of yarns are bonded into a coherent fabric.
Claim 6
Dependent Claim
168 words
A process for preparing a web with a finishing coating comprising applying to a web a fluid adhesive coating and subsequently solidifying said adhesive coating at a temperature of at least 66°C., said web comprising a textile fabric and a cloth finishing adhesive that is the cured product of a formulation containing chemical unsaturation and capable of rapid polymerization under the influence of actinic radiation, said formulation comprising a hexafunctional urethane oligomer and beta-carboxyethyl acrylate, wherein said formulation provides a web, including the cured product of the formulation, said web having an edge curl, measured by the angle between an imaginary line tangent to the extreme edge of the curled web, in an imaginary plane perpendicular to the uncurled central part of the web, and a line in the same imaginary plane that forms the central line of the flat portion of the web, when heated to a temperature between 66°C. and 121°C. that is less than five degrees when subjected to said applying adhesive and said solidifying.
Claim 7
Dependent Claim
28 words
A process according to claim 6, wherein said hexafunctional urethane oligomer and beta-carboxyethyl acrylate comprise at least 40 % by weight of the fluid ingredients in said formulation.
Claim 8
Dependent Claim
53 words
A process according to claim 6 or 7, wherein said web, after curing of said formulation containing chemical unsaturation and capable of rapid polymerization under the influence of actinic radiation, but before the application of any other adhesive to said web, is heated to improve the degree of curl resistance of the web.
References Cited (Backward Citations)
No citation records indexed.
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