摘要:
The invention relates to a molding composition (P) comprising: (A) 81.7 to 99.4 wt.-% of at least one thermoplastic polymer composition (A); (B) at least one hindered amine light stabilizing composition (B) comprising: (B-1) 0.1 to 0.9 wt.-% of a hindered amine light stabilizer mixture having a monopiperidine structure, (B-2) 0 to 0.4 wt.-% of at least one hindered amine light stabilizer having a dipiperidine structure with at least one alkyl group at each of the 2 and 6 positions of the dipiperidine structure and (B-3) 0.5 to 2 wt. -% of at least one hindered amine light stabilizer having a polymeric structure comprising piperidine groups (C) 0 to 10 wt.-% of one or more colorants, dyes and/or pigments (C); and (D) 0 to 5 wt.-%, based on the total weight of the molding composition (P), of one or more further additives (D); wherein constituents (A) to (D) sum up to 100 wt.-% of molding composition (P).
摘要:
Sterilized wound healing compositions comprise stabilized cyanoacrylate monomers homogenously mixed together with a naphthoquinone 2,3-oxide, including vitamin K oxides. The compositions are sterilized by irradiation, and the sterilized compositions are shelf stable such that their viscosity does not substantially increase following at least two years of shelf storage. The compositions may be used for closure of open wounds, and the compositions enhance the rate of wound healing relative to wounds not closed with the compositions.
摘要:
A compound represented by formula (I) is disclosed. P1 and P2 represent a polymerizable group; m1 and m2 represent an integer of from 1 to 10, “A” represents a divalent group having a 5- to 18-membered aromatic hydrocarbon ring or a 5- to 18-membered aromatic hetero ring, L3 and L4 represent a C1-10 alkyl group or a C1-10 alkoxy group, k1 and k2 represent an integer of from 0 to 4, X1, X2, X3 and X4 represent —O—, —S—, —NH—, —NR— or —SiR0R00—, n1 and n2 represent 0 or 1, provided that at least one of them is 1; and L1a, L1b, L2a and L2b represent a hydrogen atom, halogen atom, —CN, —NC, —NCO, —NCS, or —OCN, provided that those in which both of X2 and X3 represent —O—, those in which one of X2 and X3 represents —O— and another represents —NH— or —NR— are excluded only when n1 is 1, both of L1a and L1b are hydrogen atoms, n2 is 1, and both of L2a and L2b are hydrogen atoms, or only when n1 is 1, both of L1a and L1b are hydrogen atoms, and n2 is 0.
摘要:
The present invention is directed to a bioadhesive thermogelling hydrogel composition for repairing and/or augmenting an intervertebral disc. The bioadhesive thermogelling hydrogel composition can be cross linked with the surrounding tissue so as to potentially serve as a nucleus pulposus replacement or augmentation along with serving to repair annular tears or fissure. The bioadhesive thermogelling hydrogel composition may include three main components: a thermal responsive polymer, an amine-containing polymer and a crosslinking component. All three components can be modified and combined in numerous ways to serve the need of the system as long as the amine-containing component is kept separate from the crosslinking component until the components are injected. The incorporation of a two-part crosslinking thermal responsive hydrogel permits smaller amounts of the crosslinking component to be used and enables the crosslinking dialdehyde to be delivered locally into the tissue that will react with the hydrogel. This helps prevent damage to tissues away from the hydrogel.
摘要:
Elastomer coating composition are disclosed which cure at room temperature, and form highly flex-resistant, durable, and flexible protective layer on elastomers and provides excellent adhesion to elastomeric and metal substrates. The coating is a solvent solution of (A) a carboxylated hydrogenated acrylonitrile-butadiene copolymer, and (B) a room temperature isocyanate curing component. Coated bonded elastomer-metal composites are obtained without an additional application of heat to cure the coating.
摘要:
The invention is specifically concerned with an improvement in the process of manufacturing reinforced materials. The reinforced materials are conceived to include a wide variety of materials, the most notable being high density compressed gaskets. The improvement comprises mixing a cut solid (generally a cut fiber) with a body material to produce the reinforced materials. The solid is cut into particulates of highly variable size, the range in the size of the particulates being adjusted to optimize the characteristics of the resulting reinforced material. The cut solid is produced utilizing comminuting machines previously used for the recycle of waste products.
摘要:
The present invention relates to a film comprising a low density linear ethylene copolymer of ethylene and a higher olefin and up to about 10 percent by weight of the total composition of an acrylonitrile homopolymer or copolymer.
摘要:
A homogenous sample of identical bispecific antibody determinants, each determinant being composed of two L-H half-molecules linked by disulfide bonds, each L-H half-molecule being specific for a different antigenic determinant and including at least the F(ab') portion of a monoclonal IgG antibody. The bispecific antibody determinants are useful, e.g., in the formation of multilamellar assemblies and enzyme electrodes.
摘要:
Disclosed are cyanoacrylate adhesive compositions containing elastomeric polymers as fillers. Preferred fillers are the acrylic rubbers. Filler concentration range from about 0.5-40% by weight of the composition. Beneficial results include improved toughness of the cured compositions, as measured by impact, peel and tensile strength properties, particularly after exposure elevated temperatures which would ordinarily severely degrade the adhesive strength.
摘要:
An adhesive composition based on a monomeric ester of .alpha.-cyanacrylic acid and a modifying agent, viz. a monomeric fluorinated ether of dimethylvinylethynylcarbinol of the formula: ##STR1## wherein R is CH.sub.2 (CF.sub.2).sub.n H or CH.sub.2 (CF.sub.2).sub.n CF.sub.3 ; n=2 to 10.Owing to the addition of a monomeric fluorinated ether of dimethylvinylethynylcarbinol as a modifying agent into the adhesive composition, mechanical strength and water-resistant of the adhesive bond are improved. Thus, an ultimate shear strength of the adhesive bond produced from the adhesive composition according to the present invention after keeping in water for 10 days is equal to 119-185 kgf/cm.sup.2.