申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC. 미쯔비시 가스 케미칼 컴파니, 인코포레이티드(519987107471)
公开号:KR20170122276A
公开(公告)日:2017-11-03
본 발명에 따르면, 식(1)로 표시되는 폴리티올(A) 및 식(2)로 표시되는 티올 화합물(B)을 함유하는 폴리티올 조성물을 제공할 수 있다. (식(1) 중, p, q는, 각각 독립적으로 1~3의 정수를 나타낸다.) (식(2) 중, p, q는, 각각 독립적으로 1~3의 정수를 나타낸다.)
High-molecular-weight novolak substituted phenolic resins and their preparation
申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0032062A2
公开(公告)日:1981-07-15
Conventional novolak phenolic resins generally possess molecular weights of 1200 or less and exhibit unsatisfactory heat resistance and mechanical properties for all intended uses. Attempts to produce higher-molecular-weight resins have failed. These difficulties have been overcome and a high-molecular-weight novolak substituted phenolic resin having a number average molecular weight of at least 1500 is prepared by reacting (A) (i) a phenol component mainly comprising a bifunctional phenol or (ii) a low-molecular-weight novolak substituted phenolic resin derived from this phenol and an aldehyde, with (B) a chain extender selected from (i) dimethylolated products of bifunctional or trifunctional phenols, (ii) a low-molecular-weight resol substituted phenolic resin derived from a phenol component mainly comprising a bifunctional phenol and an aldehyde, (iii), an aldehyde, (iv) a ketone, (v) a diol and (vi) a dihalide in the presence of an acid catalyst, with the proviso that if the reactant (A) is the phenol component (i), the chain extender (B), is the resol substituted phenolic resin (ii). These high-molecular-weight novolak resins can be used in setting resin compositions with setting resins such as epoxy resins.
A sulfur-containing acryl oligomer composition represented by formula (I):
wherein R₁ represents a hydrogen atom or a methyl group; R₂ and R₃ each represents an alkylene group having from 1 to 12 carbon atoms; R₄ represents an alkylene group having from 1 to 12 carbon atoms, an oxydialkylene group having from 2 to 12 carbon atoms, or an aralkylene group having from 6 to 20 carbon atoms; X represents a chlorine, bromine or iodine atom; m represents 0 or an integer of from 1 to 4; and n represents an average degree of oligomerization of 10 or smaller.
The oligomer composition provides on polymerization a cured product having a refractive indices of 1.60 or higher, excellent transparency, and optical uniformity and is therefore useful as a material for plastic lenses.
NOVEL THIOL COMPOUND COMPOSITION FOR OPTICAL MATERIAL
申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:EP3266809A1
公开(公告)日:2018-01-10
According to the present invention, it is possible to provide a polythiol composition, which comprises a polythiol (A) represented by formula (1) and a thiol compound (B) represented by formula (2).
(In formula (1), p and q each independently represent an integer of 1 to 3.)
(In formula (2), p and q each independently represent an integer of 1 to 3.)
Electrophotographic member, process cartridge and electrophotographic apparatus
申请人:CANON KABUSHIKI KAISHA
公开号:US10303079B2
公开(公告)日:2019-05-28
Provided an electrophotographic member that contributes to the formation of a higher grade of an electrophotograph than ever for use in an ultralow-temperature environment.
The electrophotographic member has an electro-conductive resin layer, and the resin layer comprises a resin having a specific structure and an anion.