摘要:
A method of forming a three-dimensional object is described. The method may use a polymerizable liquid, or resin, useful for the production by additive manufacturing of a three-dimensional object, comprising a mixture of (i) a light polymerizable liquid first component, and (ii) a second solidifiable component that is different from said first component.
摘要:
A method of forming a three-dimensional object, wherein said three-dimensional object is an insert for use between a helmet and a human body, is described. The method may use a polymerizable liquid, or resin, useful for the production by additive manufacturing of a three-dimensional object, comprising a mixture of (i) a light polymerizable liquid first component, and (ii) a second solidifiable component that is different from said first component.
摘要:
A compound is described having following formula: (I) Also described is a mixture of compounds comprising the reaction product of i) a urethane compound comprising a perfluorooxyalkyl moiety and at least two (meth)acryl groups; and ii) a silane compound comprising hydrolysable groups and a group selected from amine or mercapto group; wherein i) and ii) are reacted at an equivalent ratio of excess compound i) such that (meth)acryl groups remain unreacted. Methods and articles are also described.
摘要:
This invention relates to polybutadiene modified polymer polyols which comprise one or more base polyols, at least one preformed stabilizer, one or more ethylenically unsaturated monomers, and polybutadiene, in the presence of at least one free radical polymerization catalyst, and optionally, one or more chain transfer agents. The polybutadiene present in these polybutadiene modified polymer polyols may be carried into the polymer polyol through the preformed stabilizer, by a polybutadiene containing component that is added separately from the preformed stabilizer to the polymer polyol, or a combination thereof, with the total amount of polybutadiene ranging from 0.03 to 1.0% by weight of polybutadiene, based on 100% by weight of the polymer polyol. The present invention also relates to processes for preparing these polybutadiene modified polymer polyols, to foams prepared from these polybutadiene modified polymer polyols, and to processes for producing foams from these polybutadiene modified polymer polyols.
摘要:
Disclosed are one-component compositions that include: (1) an isocyanate-functional urethane acrylate and (2) a polyisocyanate containing allophanate and/or uretdione groups, wherein the one-component composition has a viscosity of less than or equal to about 800 mPa·s and an isocyanate content of greater than about 5% by weight, based on the weight of the one-component composition. Also disclosed are circuit boards and electronic components that are coated with such compositions.
摘要:
Disclosed herein are a plastic lens material having both excellent optical and mechanical properties and having a low specific gravity, and a production process for producing the plastic lens material having excellent various properties and a low specific gravity. The plastic lens material comprises a copolymer obtained by radical-polymerizing a reaction product of a component [A] containing a polyhydric alcohol obtained by subjecting a dimer and/or a trimer of a higher unsaturated fatty acid having 11 to 22 carbon atoms with a component [B] containing an isocyanate compound having a radical-polymerizable unsaturated bond in its molecule together with a copolymerizable monomer [C].
摘要:
Addition polymerizable polyethers having pendant ethylenically unsaturated urethane groups are usefully employed as flooring materials and in other applications utilizing radiation curable or chemically curable materials. Such urethane polyethers are advantageously prepared by reacting a polyether polyol such as a hydroxy terminated polypropylene glycol with an isocyanatoalkyl ester of an ethylenically unsaturated acid such as 2-isocyanatoethyl methacrylate.
摘要:
A flexible polybutadiene resin composition having 100 parts of (a), 5 to 120 parts of (b), and 50 to 500 parts of (c), whereA. is a thermosetting resin having a molecular weight of 500 to 100,000 and having the formula:YCH=CX--An.sub.1 --Jn.sub.2 --Gn.sub.3 --D--E--(PBd)--E--D--Gn.sub.3 ].sub.m Jn.sub.2 --An.sub.1 --CX=CHYwherein X is hydrogen, or an alkyl radical containing up to four carbon atoms; Y is selected from the group consisting of hydrogen, phenyl, and alkoxycarbonyl; A is a carboxyl, or a carbonyl group; J is an alkylene group containing less than five carbon atoms and G is selected from the group consisting of urethane, carboimino and ureylene group; E is urethare or carboimino, and can be the same or different from G; D is selected from the group consisting of alkylene, cycloalkylene, phenylene, naphthylene, pyrene, bis(phenylene)methylene and tris(phenylene)methylidyne radical in which the radical may be substituted by a lower alkyl radical); PBd is a polybutadiene or copolybutadiene or hydrogenized polybutadiene chain having a polymerization degree of from 4 to 370 and from about 50 percent to about 100 percent of 1,2-configuration; n.sub.1, n.sub.2 and n.sub.3 express 0 or 1 respectively, wherein a combination of (1) n.sub.1 is 1, n.sub.2 is 1, and n.sub.3 is 0 and (2) n.sub.1 is 1, n.sub.2 is 0 and n.sub.3 is 0 does not occur; and m expresses an integer of 1 to 3;B. is a solid plasticizer having 50.degree. to 100.degree. C of softening point, less than 50 of bromine value and 500 to 3,000 of number average molecular weight; and,C. is a vinyl monomer.
摘要:
The present invention relates to a UV absorber-comprising urethane acrylate, to a process for its preparation, and to the use thereof. The UV absorber is chemically bonded into the system. The UV absorber-comprising urethane acrylate has the formula (I):