D1365 bj radiation curable primary coating for optical fiber

A radiation-cured, primary technology, applied in the direction of coating, glass optical fiber, cladding optical fiber, etc., can solve the problem of attenuation of signal transmission ability of coated optical fiber

Inactive Publication Date: 2012-07-25
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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  • D1365 bj radiation curable primary coating for optical fiber
  • D1365 bj radiation curable primary coating for optical fiber
  • D1365 bj radiation curable primary coating for optical fiber

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0085] 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.

[0086] Polyols suitable for use in the preparation of oligomers may have a molecular weight of about 1000 or higher, suitably about 1500 or higher, and even more suitably about 2000 or higher. Suitably, the MW may be about 8000 or less, more suitably about 6000 or less.

[0087] Examples of suitable polyols and hydroxyl-containing (meth)acrylates are disclosed in WO 00 / 18696, which is hereby incorporated by reference. Preferably, polypropylene glycol (MW=4200) is used (eg Acclaim 400 from Bayer).

...

example 1         example 2         example 3

[0118] Hydroxy-containing acrylate (HEA) 1.84 1.84 1.84

[0119] Isocyanate (TDS) 4.14 4.14 4.14

[0120] Acclaim 4200 62.11 62.11 62.11

[0121]BHT 0.061 0.061 0.061

[0122] DBTDL 0.034 0.034 0.034

[0123] SR 395 5.81 5.81 5.81

[0124] Radiation Curable Coating Compositions Wt.%

[0125] Primary coating oligomer 74 75 76

[0126] Dilute monomer (SR 504D) about 10.4wt%. 10.4 10.4

[0127] Dilute monomer (SR 349) about 5.0wt%. 5.0 5.0

[0128] Dilute monomer (SR 395) about 6.0wt% 6.0 6.0

[0129] The first photoinitiator (Chivacure TPO) .30 .30 .30

[0130] Second photoinitiator (Chivacure 184) 1.00 1.00 1.00

[0131] Antioxidant (Irganox 1035) 0.75 0.75 0.75

[0132] The first light stabilizer (Tinuvin 123) 0.4 0.4 0.4

[0133] Second light stabilizer (Lowilite 20) 0.15 0.15 0.15

[0134] Adhesion Promoter (A-189) 1.0 2.0 3.0

[0135] (The above-mentioned percentages are selected so that the total amount of the composition is adjusted to 100% by weight).

...

Embodiment

[0142] Test methods for tensile strength, elongation and modulus:

[0143] Tensile properties (tensile strength, elongation at break, and modulus) of cured samples of radiation-curable primary coatings for optical fibers were tested using an Instron Model 4201 universal tester equipped with an appropriate personal computer and Instron software to obtain tensile Values ​​for strength, elongation at break, secant modulus, or split modulus. 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. For relatively soft coatings (eg, those with a modulus less than about 10 MPa), the coating was drawn and then cured on a glass plate, from which individual samples were cut with a scalpel. The modulus was calculated at 2.5% elongation in the Instr...

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Abstract

The present invention relates to a radiation curable coatings for use as a Primary Coating for optical fibjers, optical fibers coated with said coatings and methods for the preparation of coated optical fibers. The present invention provides a radiation curable Primary Coating composition comprising: an oligomer; first diluent monomer; a second diluent monomer; a third diluent monomer; a first light stabilizer; a first photoinitiator; a second photoinitiator; an antioxidant; a second light stabilizer; and an adhesion promoter; wherein said oligomer is the reaction product of: hydroxyl-containing acrylate; an isocyanate; a polyether polyol; a polymerization inhibitor; a catalyst; and a diluent; wherein said oligomer has a number average molecular weight of from at least about 4000 g / mol toless than or equal to about 15,000 g / mol; and wherein said catalyst is selected from the group consisting of copper naphthenate; cobalt naphthenate; zinc naphthenate; triethylamine; triethylenediamine; 2-methyltriethyleneamine; dibutyl tin dilaurate; metal carboxylates, including, but not limited to: organobismuth catalysts such as bismuth neodecanoate; zinc neodecanoate; zirconium neodecanoate; zinc 2-ethylhexanoate; sulfonic acids, including but not limited to dodecylbenzene sulfonic acid, methane sulfonic acid; amino or organo-base catalysts, including, but not limited to: 1,2-dimethylimidazole and diazabicyclooctane; triphenyl phosphine; alkoxides of zirconium and titanium, including, but not limited to Zirconium butoxide and Titanium butoxide; and Ionic liquid phosphonium salts; and tetradecyl(trihexyl) phosphonium chloride; and wherein a cured film of said radiation curable Primary Coating composition has a peak tan Delta Tg of from about -25 DEG C to about -55 DEG C; and a modulus of from about 0.85 MPa to about 1.10 MPa.

Description

[0001] Cross References to Related Applications [0002] This patent application claims priority to co-pending US Provisional Patent Application 60 / 874,731, "BJ Radiation Curable Primary Coating for Optical Fiber," filed December 14, 2006, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a radiation curable coating for use as a primary coating for an optical fiber, to an optical fiber coated with such a coating and to a method of producing such a coated optical fiber. Background technique [0004] Optical fibers are typically coated with two or more radiation curable coatings. These coatings are usually applied to the fiber in liquid form and then cured by exposure to radiation. The type of radiation useful for curing such coatings should be one capable of initiating polymerization of one or more radiation curable components of such coatings. Radiation suitable for curing such coatings is well known and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C25/10C03C25/26C09D11/00C09D175/14C09D175/16
CPCC08G18/672C09D175/16C03C25/1065C09D5/002Y10T428/2964C08G18/48C03C25/10C03C25/26C08F290/06C03C25/326C09D175/08G02B6/02395
Inventor 泰森·迪恩·诺林史蒂文·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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