Raw composition for preparing polyurethane foam having improved adhesive and demolding properties, polyurethane foam made therefrom, and preparation method thereof
AssigneeLG Electronics Inc.
InventorsBeung-Choul You, Ju-Hyun Kim
Life of this patent
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Abstract
In a composition for rigid polyurethane foam, polyurethane foam made therefrom and a preparation method thereof, by using an appropriate composition comprising polyol with a high functional group, a catalyst and a blowing agent, polyurethane foam having improved demolding and adhesive properties can be fabricated. In addition, in order to solve problems according to viscosity rise of a composition caused by polyol with a high functional group, a discharging temperature is adjusted in discharging of a raw composition to improve compatibility of ingredients and polyurethane foam having better properties can be obtained.
Claims8
A composition for preparing polyurethane foam having improved demolding and adhesive properties, comprising:
- a mixed polyol 100 weight parts, isocyanate 150-180 weight parts, water 3.0-6.0 weight parts, HCFC-141b 10-50 weight parts, catalyst A 0.1-2.0 weight parts, catalyst B 0.1-0.5 weight parts, catalyst C 0.1-0.5 weight parts and surface-active agent 1.0-4.0 weight parts,
- wherein the mixed polyol comprises polyol A 50-60 weight parts prepared by polymerization of an organic oxide by using sorbitol with a hexa-valent functional group as an initiator;
- polyol B 20-30 weight parts prepared by polymerization of an organic oxide by using TDA with a tetra-valent functional group as an initiator;
- polyol C 5-20 weight parts prepared by polymerization of an organic oxide by using sucrose with a octa-valent functional group and glycerine with a tri-valent functional group as initiators;
- and polyol D 3-10 weight parts prepared by polymerization of an organic oxide by using EDA with a tetra-valent functional group as an initiator,
- wherein the catalyst A is obtained by mixing a gelling catalyst and a blowing catalyst, the catalyst B is a gelling catalyst, and the catalyst C is a trimerization catalyst.
A preparation method of a composition for preparing polyurethane foam having improved demolding and adhesive properties, comprising the steps of:
- preparing a mixed polyol by sufficiently mixing polyol A 50-60 weight parts prepared by polymerization of an organic oxide by using sorbitol with a hexa-valent functional group as an initiator, polyol B 20-30 weight parts prepared by polymerization of an organic oxide by using TDA with a tetra-valent functional group as an initiator, polyol C 5-20 weight parts prepared by polymerization of an organic oxide by using sucrose with a octa-valent functional group and glycerine with a tri-valent functional group as initiators, and polyol D 3-10 weight parts prepared by polymerization of an organic oxide by using EDA with a tetra-valent functional group as an initiator;
- and
- sufficiently mixing the obtained mixed polyol 100 weight parts, isocyanate 150-180 weight parts, water 3.0-6.0 weight parts, HCFC-141b 10-50 weight parts, 0.1-2.0 weight parts of mixed catalyst A which is a mixture of a gelling catalyst and a blowing catalyst, gelling catalyst B 0.1-0.5 weight parts, trimerization catalyst C 0.1-0.5 weight parts and surface-active agent 1.0-4.0 weight parts.
Dependencies are inferred from the claim text.