Preparation of Discrete Oligoethers: Synthesis of Pentabutylene Glycol and Hexapropylene Glycol by Two Complementary Methods
摘要:
Two experimentally facile methods for the preparation of discrete oligoethers are reported. The first involves an iterative sequence of oxidation, acetal formation, and reductive ring opening for the synthesis of penta-1,4-butylene glycol. The second method is also iterative, comprising phase-transfer etherification and end-group deprotection to form hexa-1,3-propylene glycol. These methods offer significantly improved yields and purification protocols over previously reported syntheses.
Preparation of Discrete Oligoethers: Synthesis of Pentabutylene Glycol and Hexapropylene Glycol by Two Complementary Methods
摘要:
Two experimentally facile methods for the preparation of discrete oligoethers are reported. The first involves an iterative sequence of oxidation, acetal formation, and reductive ring opening for the synthesis of penta-1,4-butylene glycol. The second method is also iterative, comprising phase-transfer etherification and end-group deprotection to form hexa-1,3-propylene glycol. These methods offer significantly improved yields and purification protocols over previously reported syntheses.
ANTIMICROBIAL COMPOSITIONS COMPRISING TRIMETHYLENE GLYCOL OLIGOMER AND METHODS OF USING THE COMPOSITIONS
申请人:Fenyvesi Gyorgyi
公开号:US20110224307A1
公开(公告)日:2011-09-15
Disclosed are antimicrobial compositions, and methods for killing, inhibiting, or preventing the growth of microbes, using trimethylene glycol oligomers or dimers. The trimethylene glycol oligomers and dimers have the formula R(CH
2
CH
2
CH
2
—O—CH
2
CH
2
CH
2
)
n
R
1
where R and R
1
are hydroxyl, amine, or ester functionalitiess, and n is 2 or higher. The antimicrobial compositions are useful in personal care and cosmetic compositions
A photosensitive lithographic printing plate comprising: a support; and a photosensitive layer, wherein the photosensitive layer comprises: a polyurethane resin binder comprising an aliphatic cyclic structure which has a carboxyl group as a substituent directly or indirectly attached to the structure; or a polyvinyl alcohol resin binder modified with an acetal skeleton comprising an aliphatic cyclic structure.
POLYMERIZABLE COMPOSITION AND LITHOGRAPHIC PRINTING PLATE PRECURSOR
申请人:Sugasaki Atsushi
公开号:US20090053653A1
公开(公告)日:2009-02-26
A polymerizable composition comprising: a polyurethane resin synthesized by using a compound represented by the following formula (I) as one of starting materials; a photopolymerization or thermal polymerization initiator; and an addition-polymerizable compound having an ethylenically unsaturated bond:
wherein X represents a tri- or higher valent atom; R
1
and R
2
each independently represent a single bond or an alkylene group optionally having a substituent, provided that R
1
and R
2
do not represent a single bond at a same time; A represents a straight chain linking group; and n is an integer of from 1 to 5.
PHOTOSENSITIVE COMPOSITION, PLANOGRAPHIC PRINTING PLATE PRECURSOR, POLYURETHANE, AND METHOD FOR PRODUCING POLYURETHANE
申请人:FUJIFILM CORPORATION
公开号:US20140134540A1
公开(公告)日:2014-05-15
A photosensitive composition includes (A) a polyurethane obtained by reacting a diol component including a compound represented by the following Formula (I) with a polyisocyanate component; and (B) a photosensitive component. In Formula (I), A represents a single bond, or a divalent linking group including an atom selected from the group consisting of a carbon atom, a hydrogen atom, and an oxygen atoms; B represents a monovalent organic group; each of R
1
to R
5
independently represents a hydrogen atom or an alkyl group; m represents an integer from 0 to 3; n represents an integer from 0 to 3; and m+n is not zero.
Dithiophosphorus/amine salts and aqueous compositions containing same
申请人:The Lubrizol Corporation
公开号:EP0116399A2
公开(公告)日:1984-08-22
Phosphorus, sulfur and nitrogen containing salts prepared from dithiophosphorus compounds and amnines are disclosed, which salts find utility in aqueous functional fluids. Compositions comprising a continuous aqueous phase, at least one of said salts prepared from dithiophosphorus compounds and amines and optionally a surface active agent are also disclosed.