An elastic composition comprising the following structure:

##STR00001##

wherein: PDMS is polydimethylsiloxane having at least 5 dimethylsiloxane units; L is a bond or hydrocarbon linker; the asterisk (*) in A units denotes a connection point with an asterisk in B units, and at least one of the following linkages connect between connection points:

##STR00002##

r is an integer of at least 3; R is a hydrocarbon or siloxane-containing linking moiety; the composition includes a multiplicity of A units and multiplicity of B units; and a portion of the connection points are necessarily terminated by endcapping groups, wherein at least a portion of the endcapping groups are selected from the following structures:

##STR00003##

The invention also includes methods for making and using the above-described elastic composition.

An advanced manufactured interpenetrating polymer network (AM-IPN) comprising: a primary polymer network; a secondary polymer network, wherein the secondary polymer network is bonded to the primary polymer network via one or more crosslinks, wherein one or more of the primary polymer network, the secondary polymer network and the one or more crosslinks are printed using a synthetic bioink is disclosed. Methods of making and using are also disclosed.

An example of a flow cell includes a substrate and a cured, patterned resin on the substrate. The cured, patterned resin has nano-depressions separated by interstitial regions. Each nano-depression has a largest opening dimension ranging from about 10 nm to about 1000 nm. The cured, patterned resin also includes an interpenetrating polymer network. The interpenetrating polymer network of the cured, patterned resin includes an epoxy-based polymer and a (meth)acryloyl-based polymer.

This invention relates to urethane acrylic hybrid polymer dispersion with robust dry/wet adhesion and the basecoats prepared therefrom for automotive applications. In this system, the polyurethane dispersion (PUD) prepolymer is based on a combination of polyols and aliphatic diisocyanates. The acrylic portion is based on (meth)acrylated monomers. A combination of this hybrid polymer dispersion and other resins having defined glass transition temperature (T.sub.g) values, organic and/or inorganic rheology modifiers, and different additives including pigment, dispersant, and defoamer are used to prepare waterborne basecoats having modified appearance and performance. The final coatings show excellent dry/wet adhesion to the primer for automotive applications.

Provided are ophthalmic devices comprised of a reaction product of a composition comprising: (i) a crosslinked substrate network containing covalently bound activatable free radical initiators; and (ii) a grafting composition containing one or more ethylenically unsaturated compounds. Also provided are processes for making ophthalmic devices.

Provided are polymer compositions made by a process comprising: (a) providing a first reactive composition containing: (i) a polymerization initiator that is capable, upon a first activation, of forming two or more free radical groups, at least one of which is further activatable by subsequent activation; (ii) one or more ethylenically unsaturated compounds; and (iii) a crosslinker; (b) subjecting the first reactive composition to a first activation step such that the first reactive composition polymerizes therein to form a crosslinked substrate network containing a covalently bound activatable free radical initiator; (c) contacting the crosslinked substrate network with a grafting composition containing one or more ethylenically unsaturated compounds, wherein the contacting is conducted under conditions such that the grafting composition penetrates into the crosslinked substrate network; and (d) activating the covalently bound activatable free radical initiator at one or more selective regions of the crosslinked substrate network such that the grafting composition polymerizes with the crosslinked substrate network at the selective regions.

The present invention is directed to a method for producing a semi-IPN composite, including: mixing a polyurethane (A) and a polymerization product (B) of a hydrophilic acrylic monomer (b1) and an acrylic monomer (b2) having a hydrolyzable silyl group; and causing the polymerization product (B) to undergo crosslinking. The hydrophilic acrylic monomer (b1) preferably includes an acrylic monomer (b1-1) having an amide group and an acrylic monomer (b1-2) having an oxyethylene group. Further, the polymerization ratio (molar ratio) of the acrylic monomer (b1-1) having an amide group, the acrylic monomer (b1-2) having an oxyethylene group, and the acrylic monomer (b2) having a hydrolyzable silyl group {(b1-1)/(b1-2)/(b2)} is preferably in the range of 50/49.5/0.5 to 89/1/10.

IPN compositions and methods of making the same are provided. The IPN compositions can include a water swellable, water permeable IPN or semi-IPN member with a first polymer network including a hydrophobic thermoset or thermoplastic polymer, a second polymer network including a non-ionic polymer, and a third polymer network including an ionic polymer containing sulfonic acid functional groups that are otherwise difficult to form composites with hydrophobic polymers. The IPN compositions can be used in orthopedic implants or in mechanical applications as a bearing material.

The present disclosure pertains to ionic polymer compositions, including semi- and fully interpenetrating polymer networks, methods of making such ionic polymer compositions, articles made from such ionic polymer compositions, and methods of making such articles and packaging for such articles.

Provided herein are adhesive compositions comprising a polyurea-poly(meth)acrylate interpenetrating polymer network. Further provided are two-part curable adhesive compositions comprising a Part A initiator composition and a Part B activator composition. The Part A initiator composition comprises an organoborane-amine complex and the Part B activator composition comprises an isocyanate that is reactive with the amine portion of the organoborane-amine complex to liberate organoborane from the organoborane-amine complex. Further provided are methods of using an adhesive composition comprising a polyurea-poly(meth)acrylate interpenetrating polymer network, such as, for example, in joining and/or bonding together polyolefin materials (e.g., polypropylene random copolymer (PP-R) pipes).