摘要:
A polydimethylsiloxane with initiator on surface which is formed by SiH bonds crosslinking and contains 0.01-1At% of 10-uncedenyl-2-bromo-2-methyl propionate on surface. The material is prepared by mixing polymer precursor, crosslinker, initiator having alkenyl terminal in a ratio of 10:1:4-0.01, and resting for 6-24 hours. The polydimethylsiloxane with initiator on surface provided by the present invention can be further modified to form a functional layer on surface by initiated surface polymerizing reaction, and then is used in biocompatible, organic solvent compatible and heat sensitive materials. A polydimethylsiloxane with surface universally, permanently, diversely and functionally modified is achieved by a simple and convenient method in this invention.
摘要:
A wax-polymer compound includes (a) a polymer component that is a polymerized unsaturated monomer, optionally copolymerized with a vinyl-aromatic monomer, and (b) a halogenated hydrocarbon wax component. The polymer component is grafted to the halogenated hydrocarbon wax component, and the wax-polymer compound has a number average molecular weight of about 1,000 to about 100,000, A method of making the wax-polymer compound and a coated silica particle are also disclosed. A rubber composition includes a rubber elastomer comprising a polymerized unsaturated monomer and optionally a polymerized vinyl-aromatic monomer, the elastomer having a number average molecular weight of about 100,000 to about 1,000,000. It further includes a filler in an amount of about 5 to about 200 phr, the filler comprising carbon black, silica, or both; and a wax -polymer additive.
摘要:
A composition includes an agent formed by grafting at least a first polymer with lignin and a component other than the agent, lignin or the at least a first polymer, wherein lignin has an affinity for the component. A method of dispersing a component in a matrix includes adding an agent to the matrix. The agent is formed by grafting at least a first polymer with lignin. The first polymer has an affinity for the matrix. Lignin has an affinity for the component. The component is other than the agent, lignin or the at least a first polymer. The method for includes contacting the matrix with the component.
摘要:
The invention provide a class of actinically-crosslinkable silicone-containing prepolymers obtained by functionalizing an intermediary copolymer to have two or more thiol or ethylenically-unsaturated groups covalently attached thereto, wherein the intermediary copolymer is an atom-transfer radical polymerization (ATRP) product of a reactive mixture comprising a polysiloxane ATRP macroinitiator and at least one hydrophilic vinylic monomer. The present invention is also related to silicone hydrogel contact lenses made from a prepolymer of the invention and methods for making the contact lenses in a cost-effective way and with high consistency and high fidelity to the original lens design.
摘要:
The present invention relates to a photopolymerizable oligomer which is curable in a small amount of ultraviolet rays due to a fast curing rate and exhibits high strength after UV curing, a photopolymerizable resin composition containing the same oligomer, and an optical fiber with a cladding portion formed by the resin composition. The photopolymerizable resin composition according to the present invention comprises a photopolymerizable oligomer, a photopolymerizable oligomer which has fluorocarbon and contains a (meth)acrylate group at an end of the oligomer, a photopolymerizable oligomer containing two or more multifunctional acrylate groups, and a photoinitiator.
摘要:
The invention relates to a method for producing polymer coatings by surface initiated polymerisation from a plasma deposited coating. The modification of surfaces by polymer attachment is a versatile and efficient means of controlling interfacial properties such as surface energy (i.e. wetting behaviour), permeability, bio-activity, and chemical reactivity. The present invention provides a method whereby a plasma deposited coating is applied to a substrate and the polymer coating formed by surface initiated polymerisation is formed on the said coating rather than the substrate itself. This means that the growth of the polymer using the grafting from procedure can be performed efficiently and independently of the substrate form.
摘要:
A curable composition having a polythiol; at least one unsaturated compound comprising more than one carbon-carbon double bond, carbon-carbon triple bond, or a combination thereof; and a dye compound represented by formula (I). A crosslinked composition prepared from the curable composition, a method of making an at least partially crosslinked network, a method for indicating curing in a curable composition, and a method of stabilizing a curable composition comprising a polythiol and at least one unsaturated compound comprising more than one carbon-carbon double bond, carbon-carbon triple bond, or a combination thereof are also disclosed. Z is not reactive with the polythiol or unsaturated compound.