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US 2022/0025099 A1Published application
Polyurethane-foamed formulations and noise insulations with foams based thereon
AssigneeAdler Pelzer Holding GmbH
InventorsVolkmar SCHULZE, Helmut BECKER
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Abstract
Disclosed is a polyurethane foam formulation based on conventional polyether and polyester polyols based on renewable raw materials, with in particular MDI, for the production of preferably viscoelastic PUR moulded foams and sound insulations with foams based thereon.
Claims16
1:
- A polyurethane foam formulation for the production of viscoelastic PUR moulded foams comprising:
- a) a polyester polyol having a hydroxyl functionality of 2, and a hydroxyl value in the range of 50 to 150 mgKOH/g
- b) optionally, a polyether polyol having a hydroxyl functionality of 3, and a hydroxyl value in the range of 180 to 250 mgKOH/g
- c) a polyether polyol having a hydroxyl functionality of 3, and a hydroxyl value in the range of 20 to 40 mgKOH/g
- d) a block/copolymer having a hydroxyl value in the range of 25 to 45 mgKOH/g;
- and
- e) a combination of catalytic and stabilising additives.
4 more elements
2:
- The formulation according to claim 1, wherein the proportion of component (a) is 5 to 45% by weight, based on the polyol component.
3:
- The formulation according to claim 1, wherein the proportion of component (b) is 0 to 55% by weight, based on the polyol component.
4:
- The formulation according to claim 1, wherein the proportion of component (c) is 40 to 95% by weight, based on the polyol component.
5:
- The formulation according to claim 1, wherein the proportion of component (d) is 2 to 10% by weight, based on the polyol component.
6:
- The formulation according to claim 1, wherein the polyesterdiol is CNSL-based.
7:
- The formulation according to claim 1, wherein the polyether polyol of component (b) and/or component (c) is derived from glycerol.
8:
- The formulation according to claim 1, wherein the block/copolymer of ethylene oxide and/or pro pylene oxide is based on gycerol.
9:
- The formulation according to claim 1, wherein the catalytically active additives comprise at least one reactive (hydrogen azide) group.
10:
- A process for the production of soft-elastic and visco-elastic moulded foams, said process comprising providing a mixture of
- A) a (poly)-isocyanate,
- B) a formulation according to claim 1,
- C) water, and
- D) one or more catalysts;
- and
- E) reacting components A)-D).
4 more elements
11:
- The process according to claim 10, wherein component A) comprises diphenylmethane diisocyanate or a prepolymer based on MDI with an NCO content in a range of 22 to 33% is used.
12:
- The process according to claim 10, wherein component A) comprises diphenylmethane diisocyanate (MDI) having an MDI index in a range from 50 to 100.
13:
- A viscoelastic foam obtainable by reaction injection moulding, casting or as a slabstock foam of the formulation according to claim 1.
14:
- The viscoelastic foam of claim 13, formed as a molded part.
15:
- The molded part according to claim 14, in the form of sound insulation.
16:
- The process according to claim 11, wherein the MDI has a NCO content in the range of 28 to 32%.