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Radiation solidified paint

A radiation curing and coating technology, applied in the direction of coating, etc., can solve the problems of high cost of use, limited application, poor adhesion of polysiloxane polyols, etc.

Inactive Publication Date: 2005-05-04
SHANGHAI PHICHEM MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrolytic stability of polyester polyol is poor, because the optical fiber sometimes needs to work in a high-humidity environment for decades, so the application of polyester polyol in optical fiber coating has been limited
The hydrolytic stability of polycarbonate polyol is higher than that of polyester polyol, but polycarbonate polyol is generally more difficult to prepare, which makes its use cost higher and limits its application
Silicone polyols have poor adhesion and are expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: first add diisocyanate (for example: IPDI), catalyzer (DBTDL, 0.06%) in the reactor, the polyurethane polyol of equivalence is added among the reactor, its addition speed should be controlled in the reactor It is advisable that the temperature of the mixture does not exceed 80°C. Continue heating the reactor to keep the reaction mixture at 65°C for 2 hours, then add an equivalent amount of 2-hydroxy ethyl acrylate (2-HEA) at one time, and keep it at 65°C for another 1 hour, thus forming a prepolymer thing. Take 20kg of prepolymer, add 80kg of reactive diluent, photoinitiator, heat stabilizer, selective adhesion promoter, etc., and keep warm at 65°C for 2 hours to prepare 100kg of coating. The measured viscosity is 5300cps (25°C), the elastic modulus is 2.0Mpa, and the elasticity is 140%, which is suitable for the inner layer optical fiber coating.

Embodiment 2

[0016] Embodiment 2: first add polyisocyanate and catalyst into the reactor, and add the mixture of polyurethane polyol and polyamide polyol in equivalent amount into the reactor. Continue to heat the reactor to keep the reaction mixture at 65°C for 2 hours, then add an equivalent amount of 2-hydroxyethyl acrylate (2-HEA) at one time, and keep it at 65°C for another 1 hour to form a prepolymer thing. Take 70kg of prepolymer, add 30kg of reactive diluent, photoinitiator, heat stabilizer, selective adhesion promoter, etc., and keep warm at 65°C for 2 hours to prepare 100kg of coating. The measured viscosity is 6500cps (25°C), the elastic modulus is 850Mpa, and the elasticity is 21%, which is suitable for the coating of the outer optical fiber.

Embodiment 3

[0017] Embodiment 3: first add polyisocyanate and catalyst into the reactor, and add polyurethane polyol into the reactor. Continue to heat the reactor to keep the reaction mixture at 65°C for 2 hours, then add an equivalent amount of 2-hydroxyethyl acrylate (2-HEA) at one time, and keep it at 65°C for another 1 hour to form a prepolymer thing. Take 55kg of prepolymer, add 45kg of reactive diluent, photoinitiator, heat stabilizer, selective adhesion promoter, etc., and keep warm at 65°C for 2 hours to prepare 100kg of coating. The measured viscosity is 6200cps (25°C), the elastic modulus is 55Mpa, and the elasticity is 60%, which is suitable for optical fiber single-layer coating.

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PUM

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Abstract

The present invention relates to a radiation curing paint, especially a curing paint initiated by ultraviolet light or electron beam. (Meth)acrylated polyurethane oligomers in radiation-curing coatings are generally prepared by reacting polyols with diisocyanates or polyisocyanates. The polyols in the prior art usually use polyether polyols and the like, and there are various problems. Polyurethane polyols are used as polyols in the present invention, which can make up for the shortcomings of acrylated polyurethane oligomers used in optical fiber coatings and optical adhesives. It has the advantages of low cost, high number of urethane bonds, easy to achieve mechanical toughness, high chemical resistance, high hydrolytic stability, and excellent thermal stability.

Description

technical field [0001] The present invention relates to a radiation curing paint, especially a curing paint initiated by ultraviolet light or electron beam. Background technique [0002] Optical fiber coatings, radiation curable coatings for optical adhesives currently used for single or double coating are usually based on (meth)acrylated polyurethane oligomers, (meth)acrylated epoxy resin oligomers Or its combination, with some additives, such as: photoinitiator, stabilizer, selective adhesion promoter, etc., and sometimes add active diluent to adjust the viscosity of the formula and some other properties of the coating. (Meth)acrylated urethane oligomers have found particularly wide application in UV-curable fiber optic coatings. In such radiation-curing coatings, (meth)acrylated polyurethane oligomers are generally prepared by reacting polyols with diisocyanates or polyisocyanates. The polyols are usually polyether polyols, hydrocarbon polyols, polyester polyols, polyca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/00
Inventor 林际兵张金山
Owner SHANGHAI PHICHEM MATERIAL CO LTD