HYDROPHOBIC POLYSACCHARIDES WITH DIESTER- OR CARBONATE ESTER-CONTAINING LINKAGES HAVING ENHANCED DEGRADATION
申请人:Swan Dale G.
公开号:US20100316687A1
公开(公告)日:2010-12-16
Hydrophobic α(1→4)glucopyranose polymers with enhanced degradation properties are described. Between the α(1→4)glucopyranose polymeric portion and the hydrophobic portion exists a linker portion having a chemistry that facilitates degradation of the polymer. Diester and carbonate ester linker chemistries are exemplified. Biodegradable matrices can be formed from these polymers, and the matrices can be used for the preparation of implantable and injectable medical devices wherein the matrix is capable of degrading in vivo at an increased rate. Matrices including and capable of releasing a bioactive agent in vivo are also described.
METHOD OF PRODUCING A COATING HAVING METAL COORDINATING AND FILM-FORMING MATERIALS
申请人:December Timothy S.
公开号:US20080102214A1
公开(公告)日:2008-05-01
Film-forming materials include nonionic metal coordinating structures. Nonionic metal coordinating structures can coordinate metals, such as metal catalysts and metal substrates. Example film-forming materials can be the product of a poly-functional epoxide and a nucleophilic ligand having a nonionic metal coordinating structure, or the product of a poly-functional alcohol and an electrophilic ligand having a nonionic metal coordinating structure. Coating compositions can include the film-forming material and a crosslinker. The coating compositions can be used to coat a substrate, such as a metal substrate. Applied coating layers on substrates can be cured to form coating films.
Film-forming materials include nonionic metal coordinating structures. Nonionic metal coordinating structures can coordinate metals, such as metal catalysts and metal substrates. Example film-forming materials can be the product of a poly-functional epoxide and a nucleophilic ligand having a nonionic metal coordinating structure, or the product of a poly-functional alcohol and an electrophilic ligand having a nonionic metal coordinating structure.
RESIN COMPOSITION, OPTICAL COMPENSATION FILM USING SAME, AND PRODUCTION METHOD FOR SAME
申请人:TOSOH CORPORATION
公开号:US20160115333A1
公开(公告)日:2016-04-28
A resin composition including from 30 to 99 wt % of a cellulose-based resin represented by the following formula (1) and from 70 to 1 wt % of a fumaric acid ester polymer containing 30 mol % or more of a fumaric acid diester residue unit represented by the following formula (2); an optical compensation film using the same; and a production method of the optical compensation film.
(wherein R
1
to R
3
represent a substituent having a carbon number of 1 to 12, and R
4
and R
5
represent an alkyl group having a carbon number of 1 to 12).
An unsaturated polyester resin composition for ambient temperature open lay-up moulding contains styrene as an agent for cross-linking during curing, a wax for preventing air inhibition and a compound for allowing reduction of styrene evaporation. The compound is of the formula
where R, is a straight- or branched- chain substituted or unsubstituted aliphatic C6-C24 hydrocarbon, and X is
Such resin compositions are particularly suitable for producing laminates and the abovementioned compounds serve as adhesion-promoting agents. Incorporation of such compounds into the compositions enables larger amounts of the waxy substances to be included by compensating for the loss of adhesion which would otherwise have arisen from the presence of larger quantities of waxy substance.
一种用于常温开层模塑的不饱和聚酯树脂组合物含有苯乙烯(作为固化过程中的交联剂)、蜡(用于防止空气抑制)和化合物(用于减少苯乙烯的蒸发)。化合物的结构式为
其中 R 是直链或支链取代或未取代的脂肪族 C6-C24 烃,X 是
此类树脂组合物特别适用于生产层压板,上述化合物可用作粘合促进剂。在组合物中加入这类化合物,可以补偿因含有大量蜡质物质而造成的附着力损失,从而增加蜡质物质的用量。