Michael P Dempsey

US Patent:

56227779, Apr 22, 1997

Filed:

May 17, 1995

Appl. No.:

8/442622

Inventors:

Michael P. Dempsey - Aliquippa PA

Assignee:

Bayer Corporation - Pittsburgh PA

International Classification:

B32B 2700

US Classification:

442374

Abstract:

This invention relates to a process for preparing a heat-resistant reinforced polyurethane/polyurea foam by (A) preparing, at an isocyanate index of about 100 to about 115, a foamable reaction mixture comprising (a) an organic polyisocyanate; (b) 0 to about 80% by weight, based on the total amount of components (b), (c), and (d), of an isocyanate-reactive compound containing two or more isocyanate-reactive groups and having a number average molecular weight of from 400 to about 10,000; (c) about 10 to about 90% by weight, based on the total amount of components (b), (c), and (d), of an isocyanate-reactive compound containing two or more isocyanate-reactive groups other than amino groups and having a molecular weight of from 32 to 399; and (d) about 5 to about 35% by weight, based on the total amount of components (b), (c), and (d), of certain organic amines containing at least one amino group having a moderated reactivity toward the organic polyisocyanate, as indicated by a gel time exceeding about 5 seconds measured from the material initiation time at 25-40. degree. C. , and having a number average molecular weight of from 86 to 400; and (B) introducing foamable reaction mixture (A), while said reaction mixture (A) is still fluid, into a mold containing about 12 to about 35% by weight of a fibrous mat having a weight per unit area of about 225 g/m. sup. 2 to about 750 g/m. sup. 2.

US Patent:

53896963, Feb 14, 1995

Filed:

Jul 14, 1994

Appl. No.:

8/275468

Inventors:

Michael P. Dempsey - Aliquippa PA
Gene Symosko - Oakdale PA
Merle W. Lesko - McDonald PA
Ronald L. Zacour - Washington PA

Assignee:

Miles Inc. - Pittsburgh PA

International Classification:

C08G 1816

US Classification:

521128

Abstract:

The present invention is directed to an improved internal mold release system for the production of low density molded foam parts. The process comprises reacting a reaction mixture of an isocyanate and at least one organic compound containing isocyanate-reactive hydrogens in the presence of a blowing agent, a catalyst, a surfactant, an IMR, and, optionally, a reinforcing agent, in a closed mold. The IMR comprises: a) mixed esters comprising the reaction product of i) aliphatic dicarboxylic acids, ii) aliphatic polyols, and iii) monocarboxylic acids with 12 to 30 carbon atoms in the molecule. The IMR may additionally comprise b) and/or c) wherein: b) represents a compound comprising the reaction product of i) N,N-dimethylpropylene diamine with ii) a compound selected from the group consisting of tall oil, C. sub. 8-20 monofunctional carboxylic acids, and mixtures of C. sub. 8-20 monofunctional carboxylic acids; and c) represents a compound comprising the reaction product of oleic acid, adipic acid, and pentaerythritol; with the proviso that the reaction product of a) is different than the reaction product of c).