SU1483495A1 - Electroinsulating composition of uv-solidification - Google Patents

Abstract

The invention relates to the field of electrical engineering and can be used for applying a protective coating on optical fibers. The purpose of the invention is to improve the performance properties of an optical fiber by increasing its breaking strength. A composition containing octaallyl (tetrathrimethylolpropane) pentaerythritol tetrasebacate, an acrylate active diluent, a photoinitiator, a stabilizer and acrylate of diphenylolpropane Ciglycidyl ether, is applied to the light guide core by the spinner method immediately after the core has been drawn. The coating is cured with UV = light of the full spectrum of the mercury lamp, together with a dose of at least 3.5 J / cm. The resulting optical fiber with an outer diameter of 20 µm and a coating thickness of 40 µm has a breaking load (sample length 1 m) 58-64 N with optical loss x 3.0-4.2 dB / km. 2 tab.

Description

The invention relates to electrical engineering and may find application, in particular, for applying a protective coating to optical fibers.

The chain of the invention is to increase the operational reliability.

coated optical fiber by increasing the breaking load,

Approximate compositions of the composition are given in table.1.

Octaallyl (tetratrimethylolpropane) pentazrityrite tetraeebacinate (UAE) has the following structure:

four.

00 4 CO

ate

Ґ Г1 - f TfffW t Ј ъ - pyel. 2 Uuil 2

tag l

 -1LC 11 | II.2

, СЫ2СН3

CEjOCP O- 0 O

R

P

Where

R -group - (CEZ) 8-; CH -

R2 WHO -CH2-C - CH2CH, iso-mechanical indicators OAE: MM 1660, bromine number 75.0 g Bgg / 100 g, density 1.0595 g / cm3, refractive index 1.4761. UAE get by a known method.

Aliphatic epoxy resins DEG-1 or TEG-1 are used as the active diluent. DEG-1 resin is a mixture of diethylene glycol diglycidyl ether and its oligomeric compounds. TEG-1 resin is a mixture

DAG-1 Acrylate

o-sn2 sh-cngro-to-o-cng-sn-saaL-o-to-o-cng sn-cng-o

IILLa Jn. Onon t

I

Sn II cis

where R is the group-CHa-CHi-0-CH1-CH1;

ssn

n 0.30 - 0.69.

TEG-1 Acrylate

 w-o-cng sn-snl-o-to-cngiLOH Jn

about “cn

I CH2

where R is a group - (CH —O-CCHjY

- o (dn) 2-; n 0.20 - 0.63.

As an active diluent, it is also possible to use dime45 tacrylate in industry

TGM-3.

The structure of the TGM-3 with a mule:

CH3

I

CH2-C-C-02 II

about

CH3 2) 2-0- (CH2) 2-0- (CH2) 2-0-C- (J "CH2

about

Physical and chemical indicators of TGM-3: ММ 286, indeterminacy - 96.4%.

4834954

triethylene glycol diglycidyl ether with its oligomeric compounds. Acrylates of DEG-1 and TEG-1 resins with a semi, esterification process — DEG-1 resins and

TEG-1 acrylic acid at a molar ratio of acrylic acid: epoxy of the resin 1: 1 in the presence of a catalyst (triethylamine) in a quantity of 0.1 mol per 1 mol of acrylic acid and inhibitor (hydroquinone) in an amount of 0.1% of the total mass resin and acrylic acid. Synthesis is carried out at 60-65 C for 10-20 hours until a product with an acid number of not more than 8 mg KOH / g is obtained.

Physico-chemical indicators: acrylate deg-1 MM 409-474, the content of units of acrylic acid 29,2-33,8%

20 TEG-1 acrylate: MM 447-535, the content of acrylic acid units is 25.8-ol ay

3U, U / 9

ct

with dream

n 0.30 - 0.69.

t-CH2-0

S-O

sn,

triethylene glycol produced in the industry under the brand

TGM-3.

The structure of TGM-3 corresponds to the formula:

Acrylate diglycidyl ether diphenylolpropane has the structure:

12-CH-C-O-CHg-CH-CH2-O

it

Physical and chemical indicators: MM 484, the content of bound acrylic acid is 29.7% by weight of acrylate,

Diphenylolpropane diglycidyl ether acrylate is obtained by stericizing diphenyl olpropane diglycidyl ether (ED-20 epoxy resin) with acrylic acid at a molar ratio of acrylic acid 5 of 1: 1 epoxy group in the presence of a catalyst (triethylamine) in the amount of 0.05 mole per 1 acrylic). in a stream of nitrogen. The synthesis temperature is 85-90 ° С, the duration is 4-6 hours until the acid number is not more than 8.0 mg KOH / g.

Di (t-butyl) anthraquinone is used as photoinitiators; 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyldimethyl ketal, benzoin isobutyl ether; Hydroquinone, fenitiazine as stabilizers.

The UV curing insulating composition is one pack. It is prepared by simply mixing the components. The application of the composition is carried out by known methods, for example, spunbond. The composition is cured by UV light in the wavelength range of 200-400 nm.

Example. An optical fiber was fabricated, the protective shell of which is made of a photo-curing composition, the composition of which is given in Table 1. The composition is prepared as follows. To 79.9 g of diphenylol-propane diglycidyl acrylate, 15 g of triethylene glycol dimethacrylate are added, the mixture is stirred until a uniform mass is obtained, then 5 g of OAE, 0.1 g of photoinitiator, 0.001 g of stabilizer-torus are added and mixed again to formation of a homogeneous mass. The application of the electrically insulating compositions to the light guide vein is carried out by the spin-die method immediately after the vein has been drawn out. The curing is carried out with the UV light of the full spectrum of the mercury lamp, together with an irradiation dose of at least 3.5 J / cm.

0-CH2-CH-CH, -0-C-CH-CHg

III

noo

Outer diameter of optical fiber 200 µm, coating thickness

40 µm, the optical loss of light with a wavelength of 0.85 µm does not exceed 3 dB / km, the breaking load is 62 N (k - 30 samples 1 m long). The results of measurements of a discontinuous load are calculated by the statistical Weibul method, which is usually used to estimate the discontinuous load of optical fibers. Operational properties of optical fibers coated on the base-1

ve proposed composition are given in table 2.

The analysis of the data presented in Table 2 indicates that the proposed composition allows to obtain an optical fiber having a much greater breaking load as compared to a conventional one without an increase in optical loss.

Claims (1)

Invention Formula The UV-cured electrically insulating composition for obtaining a protective coating of optical fiber, containing diphenylolpropane diglycidyl ether acrylate, photoinitiator, stabilizer and active diluent, is characterized in that, in order to increase the operational reliability of the coated optical fiber by increasing the breaking load, it additionally contains octaallyl (tetratrimethylolpropane) pentaerythritolittetrasebacinate, and as an active diluent it contains (1) an acryl-enriched mixture of diglycidyl ether ilen or triethylene glycol and its oligomeric compounds with a molecular weight of 409-474 and an acrylic acid residue content of 29.2-33.8%, or 447-355 and 25.8-30.9% respectively (1) or dimethacrylate triethylene glycol (II) with the following ratio of components, wt.%: Oct. allyl (t esr-trimethylolpropane) g. pentaerythritol tetra-sebacinat5-15 Active diluent (1) or (II) 15-60 Photoinitiator 0.1-5.0 Stabilizer O, PO 1-0.5 Components Octaallyl tetrathrimethylopropy and pentaernethtrasebate Dimethacrylate tri-ethylene glycol active diluent DEG-1 epoxy acrylate TEG-H epoxy acrylate Digrilvdndyl acrylate. 1,4-butanedio Photoinitiator Stabilizer Acrylate d-glycinol ether Difa Illolpr Opana Content, wt.X, and compositions D2 1 3 1 4 I 5 T b I 7 8 proto- J J {JLjSaL. ten 15 17J 15 15 15 13 30 60 60 62 it S, 0 5.0 0.1 42 5.0 0.1 5.0 4.0 O. oOl O. OOI 0.1 0.5 0.5 78 7899 58.99 19.5 80.899 17.7 81.8 17.5 53.5 Values outside the scope of the claims Table 2 Burst Parameters Optical Weibul Loss Load Examples, dB / km average parameter value of scatter of the breaking load P6. H 162253.0 258213.4 364 194.2 4 (control) 40103.1 5 (control) 60226.2 6 (control) 484.24.5 7 (control) 43124.2 8 (prototype) 429.54.5 Compiled by E.Abdulla-Zade Editor O.Spesivykh Tehred M.Hodanich Corrector M.Sharogsh Order 2838/48 Circulation 695 Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 Diphenylpropane diglycidyl ether acrylate Rest Table 15 17J 15 15 13 60 60 62 it 42 5.0 0.1 5.0 4.0   0.1 0.5 0.5 17.7 81.8 17.5 53.5