The Dow Chemical Company

Franciszek Olstowski

Donald B Parrish

Richard D Peffley

John L Nafziger

A method for gelling relatively high molecular weight polyoxyalkylene-containing materials having a block of at least about 10 weight percent of oxyethylene units by blending therewith a sufficient quantity of a relatively low molecular weight material having at least two hydroxyl groups per molecule containing urea dissolved therein.

Non-aqueous urea-polyether gel compositions and a method for their

Incompatible compositions containing a relatively high molecular weight polyol containing terminal primary amine groups and a relatively low molecular weight polyol containing primary hydroxyl groups are rendered compatible by the addition thereto of a substituted urea such as dimethyl urea.

Compatible mixtures of aminated polyether polyols and low molecular

Compositions containing a relatively high molecular weight polyol and ethylene glycol which compositions are incompatible, i.e. separate into two distinct phases upon storage, are compatibilized by the admixture therewith of urea or a substituted urea.

Compatible polyol blends

The invention describes an improved process for preparing polyols by reacting a mono-epoxy compound such as propylene oxide with a hydroxyl-containing initiator compound such as glycerine in the presence of a catalyst, the improvement being that the catalyst is added in the form of a calcium, strontium or barium salt of an organic acid such as acetic acid. Polyols prepared by this process can be employed to prepare polyurethanes without removing the catalyst.

Process for preparing polyols

Fluid compositions containing a polyether polyol having an equivalent weight below about 250, a polyisocyanate, a solid modifier compound having a surface area less than 0.2 m.sup.2 /gram and a particle size of less than 1/4 inch in the minimum dimension and a non-amine containing catalyst rapidly solidifies into a solid, dense polyurethane free of bubbles, distortions and fissures.

Fluid rapid-setting urethane compositions

Polyurethane/vinyl polymer composites are prepared without the requirement of the application of an external source of heat by the admixture of a composition comprising

Non-cellular and cellular composites of polyurethanes and vinyl polymers

Rapid-setting polyurethanes are prepared employing as the modifier component therein a cyclic unsaturated aliphatic hydrocarbon having an atmospheric boiling point above about 140.degree. C such as dicyclopentadiene.

Rapid-setting polyurethanes prepared in the presence of a cyclic

Polyurethane and vinyl polymer composites are rapidly prepared without the requirement of the application of an external source of heat by the admixture of a composition comprising

Composites of polyurethanes and vinyl polymers

Rapid-setting polyurethanes are prepared employing a mixture consisting of an aliphatic monomeric triol and derivatives of propylene glycol having an equivalent weight of less than about 230 as the polyol component therein.

Non-elastomeric rapid-setting polyurethanes

Compositions which will rapidly set to produce solid, rigid polyurethanes without the use of a catalyst comprise an amine initiated polyether polyol such as triethanol amine, an organic aromatic polyisocyanate, such as toluene diisocyanate and a liquid modifier compound having a boiling point above about 150.degree. C such as a non-hydroxyl-containing polyoxy-alkylene compound.

Solid, rapid-setting, rigid polyurethanes

Mixtures comprising a low molecular weight diol, a liquid modifier compound having a boiling point above about 150.degree. C, such as a fatty acid or fatty oil, a polyisocyanate having a functionality of at least about 2.5 and an organotin catalyst instantly set, after a brief induction period, to a solid, dense, rigid polymeric product which can be demolded within a period of from less than 1 minute to about 5 minutes.

Rapid setting polyurethanes from diols and polyfunctional isocyanates

Compositions which will rapidly set to produce solid, rigid polyurethanes without the use of a catalyst comprise an amine initiated polyether polyol such as triethanol amine, an organic aromatic polyisocyanate, such as toluene diisocyanate and a liquid modifier compound having a boiling point above about 150.degree. C such as triethyl phosphate.

Compositions which will rapidly set to produce solid, rigid polyurethanes without the use of a catalyst comprise an amine initiated polyether polyol such as triethanol amine, an organic aromatic polyisocyanate, such as toluene diisocyanate and a liquid modifier compound having a boiling point above about 150.degree. C such as a cyclic sulfone.

A process is described for preparing rapid-setting polyurethanes which comprises admixing in the absence of a catalyst a liquid polyol component with a liquid polyisocyanate component wherein the temperature of said components prior to mixing is such that the resultant mixture has a temperature of at least 50.degree. C and will result in a peak exotherm temperature of at least 85.degree. C.

Non-catalytic process for preparing rapid-setting rigid polyurethanes

Compositions which will rapidly set to produce solid, rigid polyurethanes without the use of a catalyst comprise an amine initiated polyether polyol such as triethanol amine, an organic aromatic polyisocyanate, such as toluene diisocyanate and a liquid modifier compounds having a boiling point above about 150.degree. C such as a mixture of 1-chloronaphthalene, butyl oleate and 3-methylsulfolane.

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Freeport, TX, United States of America

Franciszek Olstowski