Sammy D Tatum

US Patent:

46121560, Sep 16, 1986

Filed:

Nov 19, 1985

Appl. No.:

6/799689

Inventors:

Ben W. Heinemeyer - Lake Jackson TX
Sammy D. Tatum - Clute TX

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B29F 300

US Classification:

264176R

Abstract:

Resinous materials are produced in the substantial absence of a solvent by feeding to an extruder operated at a temperature sufficient to cause a reaction between the reactants (A) at least one material having an average of more than one vicinal epoxy group per molecule, (B) at least one material having an average of more than one group reactive with component (A) such as hydroxyl, thiol, carboxyl, isocyanate, thioisocyanate or secondary amine groups or a combination of such groups per molecule or a material having only one primary amine group per molecule, (C) at least one catalyst for promoting a reaction between components (A) and (B) if a catalyst is required to effect the reaction between components (A) and (B), and (D) optionally one or more chain terminators and thereafter recovering a resinous material resulting from the reaction between components (A) and (B) from said extruder. This process is useful in preparing advanced epoxy resins and phenoxy thermoplastic resins.

US Patent:

39474224, Mar 30, 1976

Filed:

Aug 5, 1974

Appl. No.:

5/494795

Inventors:

Sammy Duane Tatum - Clute TX
Jerry Marvin Hawkins - Lake Jackson TX

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C08K 340

US Classification:

260 4252

Abstract:

Better wet-out of glass fiber, lower viscosity of the resin mix which allows for higher filler loadings and better stability are the improvements of this invention. The compositions are prepared by an improved process which comprises mixing a vinyl ester resin having pendant half ester groups and a copolymerizable monomer with a polymeric low profile additive, glass fiber reinforcing material, CaCO. sub. 3 filler and a viscosity reducing agent comprising a copolymer of a maleic acid half ester of a polyethylene glycol having a molecular weight of about 1450 to 6000 and a monoalkenyl aromatic monomer. A chemical thickening agent such as magnesium oxide may also be added.