摘要:
An aqueous polymer dispersion comprising a vinyl polymer with at least two phases comprising: A) 40 to 90 wt% of a vinyl polymer A having a glass transition temperature in the range of from -50 to 30 °C; and B) 10 to 60 wt% of a vinyl polymer B having a glass transition temperature the range of from 50 to 130 °C; wherein vinyl polymer A comprises 0.1 to 10 wt% of at least one acid-functional olefinically unsaturated monomer, wherein at least 20 wt% of the monomer composition used to form vinyl polymer A and vinyl polymer B is derived from at least one bio-renewable olefinically unsaturated monomer.
摘要:
A polymerization process procedures polymers that are insoluble in a reaction mixture that was homogeneous before the polymer began to form. A dispersing agent in the polymerizing system (i.e., the reaction mixture plus the dispersing agent) allows a kinetically stable dispersion of the polymer to be formed in this polymerizing system. Also, an olefin metathesis process allows for the production of polymers, the crosslinking of existing polymers, or the decrosslinking of crosslinked polymers. Both the polymerization and metathesis processes are performed under superatmospheric conditions.
摘要:
The invention relates to aqueous dispersions of chemical compounds a), characterised in that said compounds are dispersed using an ionic dispersant b) and in that the ionic groups of the dispersant can be converted into non-ionic groups by means of irradiation with energy-rich light.
摘要:
Polymeric compositions of matter are described comprising olefin polymer chains having Mn of about 400 to 75,000, a ratio of vinyl groups to total olefin groups according to formula (1), where a = -0.24 and b = 0.8, and where the total number of vinyl groups per 1000 carbon atoms is greater than or equal to 8000 Mn. The invention includes a method for preparing these polymeric products comprising contacting one or more olefin comonomers with a catalyst system containing a transition metal catalyst compound and an alumoxane wherein the aluminum to transition metal ratio is from 10:1 to less than or equal to 220:1 (Al:Me). The process conditions of the invention permit predictable macromer characteristics of both molecular weight and vinyl unsaturation.
摘要:
Inherently tacky infusible pressure-sensitive adhesive microspheres prepared by polymerizing at least one monomer which when polymerized will form a pressure-sensitive adhesive having a glass transition temperature less than about -20 DEG C. in a medium in which the monomer is substantially insoluble and in the presence of a surfactant and a suspension stabilizer which are soluble in the organic medium and substantially insoluble in the monomer under conditions of shear sufficient to form suspended particles of a size less than 200 microns. The formed microspheres are transferred to a volatile organic medium and separated from the medium in which they were formed by a centrifugal separator at a force of at least 2,000 times the force of gravity.