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D1363 BT radiation curable primary coatings on optical fibers

A radiation curing, primary technology, applied in the direction of coating, glass fiber, cladding fiber, etc., can solve the problem of signal transmission capacity attenuation of coated fiber

Inactive Publication Date: 2013-08-07
DSM IP ASSETS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microbends, if present, can cause attenuation of the signal transmission capability of the coated fiber

Method used

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  • D1363 BT radiation curable primary coatings on optical fibers
  • D1363 BT radiation curable primary coatings on optical fibers
  • D1363 BT radiation curable primary coatings on optical fibers

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0058] Various polyols can be used in the preparation of oligomers. Examples of suitable polyols are polyether polyols, polyester polyols, polycarbonate polyols, polycaprolactone polyols, acrylate polyols, and the like. These polyols may be used alone or in combination of two or more. There is no particular limitation on the polymerization method of the structural units in these polyols: any of random polymerization, block polymerization or graft polymerization is acceptable. Preferably, P2010 (BASF) is used.

[0059] When preparing oligomer A, the polyol component can be added to the oligomer reaction mixture in any suitable amount, and its amount is suitable in the range of about 20 to about 99 wt% based on the weight percentage of the oligomer mixture, more preferably Suitably in the range of about 40 to 97 wt%, preferably in the range of about 65 to about 95 wt%.

[0060] Polyols suitable for use in the preparation of oligomers may have a number average molecular weight...

Embodiment

[0211] First set of test methods for liquid coatings and cured films

[0212] Test methods for tensile strength, elongation and modulus:

[0213] The tensile properties (tensile strength, elongation at break and modulus) of the cured samples were tested using an Instron Model 4201 universal tester. Samples for testing were prepared by curing a 75 μm film of material using a Fusion UV processor. Samples in nitrogen atmosphere, 1.0J / cm 2 Next solidify. Test strips 0.5 inches wide by 5 inches long were cut from the film. The precise thickness of each sample was measured using a micrometer.

[0214] For relatively soft coatings (eg, those with a modulus less than about 10 MPa), the coating was drawn and cured on a glass plate, followed by cutting individual strips from the glass plate with a scalpel. Using a 2-lb load cell in the Instron, the modulus was calculated at 2.5% elongation with a least squares fit to the stress-strain curve. The cured film was conditioned for a ...

Embodiment I-VI

[0278] Examples I-VI and Experiments A-D

[0279] Table 1 shows the viscosity and modulus (uncured coating and cured coating) for each example and experiment

[0280] The synthesis of the urethane acrylate oligomer was performed according to the inside-out synthesis described above. Three block oligomers were prepared using 50% TDI and 50% IPDI, with TDI in the middle of the oligomer (T / I) and TDI at the end (I / T), the latter having a higher viscosity. The polyols used for the synthesis of the urethane-acrylate oligomers have molecular weights of about 2000, 4000 and 6000 g / mol, which are indicated by the values ​​used. (1), (2) and (3) in Table 1 indicate the number of polyol segments used to constitute the urethane-acrylate oligomer.

[0281] Coating preparation: 68.5 wt% oligomer, 28.5 wt% ENPA (SR504 from Sartomer) monomer diluent, 3 wt% Irgacure 184 photoinitiator (from Ciba).

[0282] Several oligomers were prepared and tested for their effect on viscoelasticity in ...

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Abstract

The invention relates to D1363 BT radiation curable primary coatings on optical fibers, optical fibers coated with said coatings and methods for the preparation of coated optical fibers. The radiation curable coating comprises at least one (meth)acrylate functional oligomer and a photoinitiator, wherein the urethane-(meth)acrylate oligomer CA / CR comprises (meth)acrylate groups, at least one polyol backbone and urethane groups, wherein about 15% or more of the urethane groups are derived from one or both of 2,4- and 2,6-toluene diisocyanate, wherein at least 15% of the urethane groups are derived from a cyclic or branched aliphatic isocyanate, and wherein said (meth)acrylate functional oligomer has a number average molecular weight of from at least about 4000 g / mol to less than or equal to about 15,000 g / mol; and wherein a cured film of the radiation curable Primary Coating composition has a modulus of less than or equal to about 1.2 MPa.

Description

[0001] Cross References to Related Applications [0002] This application is a divisional application of Chinese patent application 200780041391.X (PCT / US2007 / 025481) submitted on May 7, 2009. [0003] This patent application claims co-pending U.S. Provisional Patent Application 60 / 874,719, "CR Radiation Curable Primary Coating for Optical Fiber," filed December 14, 2006, co-pending U.S. Provisional Patent Application 60 / 874,722, "PRadiation Curable Primary Coating for Optical Fiber," filed December 4, 2006 Co-pending U.S. Provisional Patent Application 60 / 874,721, "CA Radiation Curable Primary Coating for Optical Fiber," filed December 4, 2006 Co-pending U.S. Provisional Patent Application 60 / 874,730, "Supercoatings for Optical Fiber," filed December 14, 2006, and co-pending U.S. Provisional Patent Application 60 / 974,631, "PRadiation Curable Primary Coating on Optical Fiber", said patent application is hereby incorporated by reference in its entirety. technical field [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C25/24G02B6/036
CPCC09D5/002G02B1/12G02B6/036C09D175/16C03C25/106C08G18/672C08G18/724G02B6/02395Y10T428/2964C08G18/48C09D175/06C03C13/04B05D3/067C09D175/14
Inventor 鲍路斯·安东尼厄·玛丽亚·斯特曼吴小松史蒂文·R·施密德爱德华·J·墨菲约翰·M·齐默曼安东尼·约瑟夫·托尔托雷洛
Owner DSM IP ASSETS BV
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