Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reissue Patent
2000-03-08
2001-11-13
Sellers, Robert E. L. (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S531000, C525S532000, C525S533000, C525S922000
Reissue Patent
active
RE037448
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to new epoxy(meth) acrylates, to a process for their production, and to their use as radically hardenable binders for the production of coating compositions, putties and sealing compositions, or for the production of moldings.
2. Description of the Prior Art
The term “epoxy(meth)acrylates” refers to derivatives of epoxy resins which are substantially free from epoxy groups and which contain acrylate or methacrylate groups.
Epoxy(meth)acrylates are prepared by the reaction of an epoxide resin, such as bisphenol A diglycidyl ether, with (meth)acrylic acid in the presence of catalysts (e.g. DE-A 2,349,979) and may be optionally modified by reaction with other reactants. Epoxy(meth)acrylates, which are described, e.g., in DE-A 2,429,527, 4,217,761, 4,109,048 and 3,519,117, are normally highly viscous substances that are dissolved in low molecular weight monomers or solvents to convert them into a processable state.
An underlying object of the present invention is to provide new epoxy(meth)acrylates that have a viscosity which is sufficiently low for them to be processed free from monomers and solvents, but that can nevertheless be used to produce high-quality coating compositions, sealing compositions or moldings.
This object can be achieved by the epoxy(meth)acrylates according to the invention and the method for their production.
SUMMARY OF THE INVENTION
The present invention relates epoxy(meth)acrylates which are substantially free from epoxide groups and are the reaction products of organic compounds containing epoxide groups and having a number average molecular weight (M
n
) of 130 to 1000 with
I) compounds containing carboxyl and ester groups at an equivalent ratio of carboxyl groups to epoxide groups of 0.7:1.0 to 1.0:1.0, wherein compounds I) are reaction products of
A) organic dicarboxylic acids or dicarboxylic acid anhydrides having a molecular weight of 98 to 164 with
B) reaction products containing alcoholic hydroxyl groups and prepared at a COOH/OH equivalent ratio of 0.6 to 0.95 from
a) (meth)acrylic acid and
b) tri- or tetrahydric ether alcohols having a molecular weight of 180 to 1000, which contain at least two ethylene oxide units —CH
2
—CH
2
—O— as part of one or more ether structures and which contain up to 20 mole %, based on the total moles of alkylene oxide units, of propylene oxide units, —CH
2
—CH (CH
3
)—O—, and
II) basic nitrogen compounds selected from ammonia and (cyclo)aliphatic primary and secondary amines at an NH/epoxide equivalent ratio of 0:1.0 to 0.3:1.0.
The present invention also relates to a process for preparing these epoxy(meth)acrylates and to their use in radically hardenable coating, stopper or sealing compositions, or for the production of moldings.
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patent: 4187257 (1980-02-01), Nielsen
patent: 4253918 (1981-03-01), Traenckner et al.
patent: 4357456 (1982-11-01), Lopez et al.
patent: 4690987 (1987-09-01), Sakakibara et al.
patent: 5470689 (1995-11-01), Wolf et al.
patent: 5501942 (1996-03-01), Salvin et al.
patent: 2097022-A (1993-11-01), None
patent: 2097022-A1 (1993-11-01), None
patent: 4109048-A (1992-09-01), None
patent: 4109048-A1 (1992-09-01), None
Fischer Wolfgang
Meixner Juergen
Bayer Aktiengesellschaft
Gil Joseph C.
Roy Thomas W.
Sellers Robert E. L.
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