Abstract:
This invention relates to a rubber modified acrylic and/or vinyl resin comprising the mini-emulsion polymerization product of at least one rubber compound substantially dissolved in at least one acrylic monomer and/or vinyl monomer.
Abstract:
Gegenstand der Erfindung ist die Verwendung von Polymerisaten auf Basis von nachwachsenden Rohstoffen als LPA, dadurch gekennzeichnet, dass die Polymerisate auf Basis von nachwachsenden Rohstoffen erhältlich sind durch radikalisch initiierte Polymerisation von einem oder mehreren ethylenisch ungesättigten Monomeren in Gegenwart von einem oder mehreren nachwachsenden Rohstoffen ausgewählt aus der Gruppe umfassend Kohlenhydrate und Naturkautschuks.
Abstract:
The invention provides a modified diene elastomer composition comprising a thermoplastic diene elastomer and a polysiloxane, characterized in that the polysiloxane is a branched silicone resin containing at least one group of the formula -X-CH=CH-R" (I) or -X-C≡C-R" (II), in which X represents a divalent organic linkage having an electron withdrawing effect with respect to the -CH=CH- or -C≡C- bond and/or containing an aromatic ring or a further olefinic double bond or acetylenic unsaturation, the aromatic ring or the further olefinic double bond or acetylenic unsaturation being conjugated with the olefinic unsaturation of -X-CH=CH-R" or with the acetylenic unsaturation of -X-C≡C-R", and X being bonded to the branched silicone resin by a C-Si bond, and R" represents hydrogen or a group having an electron withdrawing effect or any other activation effect with respect to the -CH=CH- or - C≡C- bond.
Abstract:
A graft natural rubber pressure-sensitive adhesive containing in a latex state a copolymer formed by graft polymerizing a vinyl polymer onto a natural rubber having a protein content of 0.1 % by weight or less in terms of nitrogen, and a pressure-sensitive adhesive tape comprising a support having coated on at least one surface thereof the pressure-sensitive adhesive. The pressure-sensitive adhesive is excellent in various properties such as film-forming property, pressure-sensitive characteristics, water resistance, and electrical insulation property.
Abstract:
The invention relates to an aqueous polymer dispersion which comprises : a) an aqueous polymer dispersion comprising grafted rubber polymeric particles from rubber polymer being selected from natural or synthetic rubber, b) an aqueous polymer dispersion with polymeric particles of a second polymer comprising monomeric units derived from a monomeric composition b) comprising : b1) a (meth)acrylate of a linear or branched alcohol in C 4 to C 10 or a mixture of such (meth)acrylates, said (meth)acrylate having Tg b1 lower than -30°C, b2) optionally, at least one comonomer having Tg b2 higher than -30°C, with said grafted rubber polymeric particles being grafted in an aqueous dispersion by a part of said monomeric composition b) as defined above. The invention covers also a specific process of preparation of said dispersion, an adhesive composition comprising said dispersion, the use of said dispersion in pressure sensitive adhesives and the resulting adhesive.
Abstract:
This invention relates to the modification of elastomers especially epoxidised rubber by reaction with unsaturated silanes, to the modified elastomers produced and to articles produced by shaping and curing modified elastomer compositions. In a process according to the present invention, the silane has the formula: R''-CH=CH-C(O)X-Y-SiR a R' (3-a) (I) or R"-C≡C-C(O)X-Y-SiR a R' (3-a) (II) in which R, R' a, Y, X and R" are as defined in the description.
Abstract:
A pressure sensitive adhesive/cohesive exhibits excellent cohesive body properties, and other desirable features, even when exposed to heat and polysiloxane based lubricants, such as in a laser printer. The formulation comprises 100 parts by weight natural rubber (e.g. electrosterically stabilized natural rubber graft and block terpolymer), and expressed as percentages by weight of the rubber the following components: about 5-35 % (e.g. about 28 %) acrylate monomer or monomers (such as methyl methacrylate, cyclohexyl methacrylate, benzyl methacrylate, and/or isobornyl methacrylate); about .5-8 % acrylic acid and /or about 1-10 % 4-acetoxystyrene; about 0-20 % ethyl hexyl acrylate; about 1-50 % (e.g. about 10-30 %) finely divided hard particulate material (such as silica gel); 0-50 % (preferably about 10-30 %) starch; and 0-40 % (preferably at least about 5 %) carboxylated styrene-butadiene latex, or carboxylated polychloroprene latex, or a styrene-acrylate-acrylonitrile latex, or vinyl-pyridine styrene-butadiene latex, or pre-crosslinked natural rubber latex, or a tackifier, or combinations thereof. The cohesive is coated onto paper and seals to like cohesive upon the application of a force of at least 100 lbs per lineal inch.