Method for producing photocurable liquid resin and photocurable liquid resin produced by such method

A light-curable, liquid resin technology, applied in chemical instruments and methods, other chemical processes, engine sealing, etc., can solve the problems of unstretched tensile strength, lack of practicability, low molecular weight, etc., and achieve heat resistance Excellent, high water vapor barrier effect
CN101309936AInactive Publication Date: 2008-11-19BRIDGESTONE CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BRIDGESTONE CORP
Publication Date
2008-11-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for producing a photocurable liquid resin which comprises (A) a step of producing a conjugated diene-based polymer or a conjugated diene / aromatic vinyl-based copolymer, which has a weight-average molecular weight of 5,000 to 40,000 and a molecular weight distribution of 3.0 or smaller, by polymerizing a conjugated diene-based monomer or a combination of a conjugated diene-based monomer and an aromatic vinyl-based monomer in a saturated hydrocarbon-based solvent using a dilithium initiator, (B) a step of producing a conjugated diene-based polymer polyol or a conjugated diene / aromatic vinyl-based copolymer polyol by reacting the produced polymer or copolymer with an alkylene oxide, (C) a step of producing a hydrogenated conjugated diene-based polymer polyol or a hydrogenated conjugated diene / aromatic vinyl-based copolymer polyol by hydrogenating the produced polymer polyol or copolymer polyol, and (D) a step of reacting the hydrogenated polymer polyol or copolymer polyol with a compound having a photocurable unsaturated hydrocarbon group. A material comprising the produced resin exhibits excellent barrier property against water vapor, excellent heat resistance and a hardness suitable for a material having rubber elasticity and is advantageously used as sealing a material.
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Description

Technical field

[0001] The present invention relates to a method for producing a photocurable liquid resin formed by introducing a photocurable unsaturated hydrocarbon group at the end of a hydrogenated conjugated diene (co) polymer polymerized by a double lithium initiator, and the light produced by the method Curable liquid resin. Background technique

[0002] In recent years, various photocurable resins for sealing materials and adhesives have been developed.

[0003] For example, Patent Document 1 discloses a polyether polyol-based photocurable resin for surface processing of woodwork products such as wood plywood, furniture, and musical instruments. However, since polyether polyols have high hydrophilicity and high water vapor permeability, they are not suitable for use in sealing materials and gasket materials that require water vapor barrier properties.

[0004] In addition, Patent Document 2 discloses a polyester polyol-based photocurable resin composition for wood coatin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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