(In the formulae, R1 and R2, which may be the same or different, each represents hydrogen or lower alkyl.)
The present invention relates to a process for producing 1,5-pentanediol derivatives represented by general formula (II) which comprises reacting 2-butenal derivatives represented by general formula (I) with formaldehyde, and hydrogenating the obtained mixture of reaction products.
The present invention provides a polyester polyol comprising within its molecular structure both structural units respectively represented by the following general formula (I) and general formula (II). In addition, the present invention provides a polyurethane using the polyester polyol of the present invention. This polyurethane exhibits excellent resistance to hydrolysis, resistance to alkali, mechanical strength, and the like.
(wherein R1 and R2 are the same or different and each represents lower alkyl having 1 to 8 carbon atoms),
(wherein R3 and R4 are the same or different and each represents lower alkyl having 1 to 8 carbon atoms).
The present invention relates to a diglycidyl ether represented by the following general formula (I):
(wherein, R1 and R2 are the same or different, and represent lower alkyl having 1∼6 carbon atoms), a composition including the glycidyl ether and epoxy resin, and epoxy resin cured product obtained by the composition. The glycidyl ether can be used as a reactive diluent for epoxy resins.
The present invention relates to di(meth)acrylate which is useful as a UV light or electron ray curing coating agent, etc., represented by the following general formula (I).
(wherein, R1 and R2 are the same or different and represent a hydrogen atom or CH3, and R3 and R4 are the same or different and represent lower alkyl of 1∼6 carbon atoms).
The di(meth)acrylate of the present invention is easily cured to provide a cured product having superior toughness and flexibility.
POLYESTER RESIN COMPOSITION, CURED RESIN, AND COATING MATERIAL
申请人:Kyowa Yuka Co., Ltd.
公开号:EP0970995A1
公开(公告)日:2000-01-12
The present invention provides a resin composition containing a polyester resin possessing, within its molecular structure, a structural unit represented by the following formula (I), and an amino resin:
[wherein, R1 and R2 are the same or different and each represents a hydrogen atom or lower alkyl, with the proviso that R1 and R2 do not simultaneously represent hydrogen atoms]. In addition, the present invention provides a cured resin obtained by means of hardening said resin composition, and a paint containing said resin composition. The aforementioned resin composition provides a cured material that exhibits excellent resistance to hydrolysis, resistance to alkali, and resistance to cissing, and thus is suitable for a paint and the like.