摘要:
Compounds of the formula ##STR1## are suitable as curing accelerators which can be incorporated into ethylenically unsaturated, cold-curable resins.
摘要:
The invention relates to the use of novel N,N-disubstituted arylamines containing polymerizable groups as hardening accelerators for polymerizable compositions based on unsaturated polyester resins, in particular for trowelling and water compositions.
摘要:
Compounds of the formula ##STR1## are suitable as curing accelerators which can be incorporated into ethylenically unsaturated, cold-curable resins.
摘要:
Compounds of the formula ##STR1## in which R represents hydrogen or a methyl group,Y.sup.1 represents an optionally branched alkylene radical with 1 to 6 C atoms,Y.sup.2 represents an optionally branched alkylene radical with 2 to 8 C atoms,X denotes oxygen or an --NH-- group,R.sup.1 and R.sup.2 are identical or different and denote hydrogen, or an alkyl, alkenyl, cycloalkyl, cycloalkenyl, aryl, aralkyl or alkylaryl group which has 1 to 11 C atoms and is optionally substituted by one or more,hydroxyl, amino, epoxide, urethane, urea, ester or ether groups, orR.sup.1 and R.sup.2 together form a 3-membered to 6-membered ring, which optionally contains nitrogen, oxygen or sulphur as hetero-atoms,R.sup.3 has the meaning of R.sup.1 or represents a group ##STR2## or R.sup.2 and R.sup.3, together with the ##STR3## group, form a 5-membered or 6-membered ring, which optionally contains oxygen as a further hetero-atom, andR.sup.4 and R.sup.5 are identical or different and represent hydrogen, an alkyl or alkenyl group which has 1 to 10 C atoms and is optionally substituted by halogen, or halogen,function as activators in the free radical polymerization of olefinically unsaturated monomers.
摘要:
The new (meth)acrylic acid derivatives containing urethane groups can be prepared by reaction of a (meth)acrylic acid ester with diisocyanates and subsequent reaction with polyols. The compounds can be used for dental materials.
摘要:
(Meth)-acrylic acid derivatives of tricyclodecanes of the formula ##STR1## in which R.sup.1 and R.sup.2 are identical or different and denote hydrogen, lower alkyl, lower alkoxy, halogen or trifluoromethyl and R.sup.3 and R.sup.4 are identical or different and represent the group ##STR2## wherein X denotes a divalent bridge member from the group ##STR3## and Y denotes a divalent bridge member from the group ##STR4## and wherein R.sup.5 represents hydrogen or methyl and R.sup.6 represents lower alkyl or phenyl, have been found. Dental compositions in which the present (meth)-acrylic acid derivatives of tricyclodecanes are used, exhibit considerably less polymerization shrinkage.
摘要:
The new (meth)acrylic acid derivatives containing urethane groups can be prepared by reaction of a (meth)acrylic acid ester with diisocyanates and subsequent reaction with polyols. The compounds can be used for dental materials.
摘要:
The invention relates to a cooking arrangement (1) comprising a cooking hob (2) which is arranged on a worktop (3), wherein the cooking hob (2) is supported on the worktop (3) by means of a carrier frame (4), wherein the cooking hob (2) has a vertical height (H) and a bottom member (6) with a bottom surface which is directed vertically downwards and wherein the worktop (3) has a top surface (7) which is directed vertically upwards. To allow an arrangement of the cooking hob (2) without machining a cutout into the worktop (3) the invention proposes that the carrier frame (4) is designed to support the cooking hob (2) in such a way that the bottom surface of the bottom member (6) is positioned in a vertical height equal or above (x) the vertical height of the top surface (7) of the worktop (3).
摘要:
The invention relates to a vehicle door system with two vehicle doors, with a vehicle body which encloses a passenger compartment and has a common vehicle door opening for the two vehicle doors, wherein, for closing the door opening, the vehicle doors being movable in a manner such that they move from an open position into a closed position and relative to each other and, in the closed position, each are adjacent to the other in a connecting region via a connecting end side, and with impact protection which has stiffening elements for stiffening the vehicle doors in the vehicle opening, and wherein at least one first stiffening element is arranged in the connecting region of the one vehicle door and at least one stiffening element is arranged in the connecting region of the other vehicle door.
摘要:
The present invention is directed to a process for the production of prepolymers containing free tertiary isocyanate groups by reacting(a) an organic diisocyanate containing one isocyanate group attached to a primary aliphatic carbon atom and an isocyanate group attached to a tertiary aliphatic or cycloaliphatic carbon atom with(b) a polyester polyol having a molecular weight of 800 to 12,000 and a hydroxyl functionality of 2 to 6 at an NCO/OH equivalent ratio of 1.6:1 to 2:1 to provide prepolymers having a molecular weight of about 1000 to 3000 and an NCO content of about 4 to 12%.The present invention is also directed to the prepolymers containing free isocyanate groups obtained by this process and to their use for the production of polyurethane lacquers and coatings.