Adhesion promoter for adhesive composites composed of plastic and of a polyisocyanate polyaddition product

Patent metadata

Field	Value
Publication number	US-9914287-B2
Application number	US-200913140161-A
Country	US
Kind code	B2
Filing date	Dec 10, 2009
Priority date	Dec 23, 2008
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

The present invention relates to composite elements comprising (i) plastic, adhering to which there is (ii) a polyisocyanate polyaddition product, where the polyisocyanate polyaddition product is obtained via mixing of (a) isocyanate with (b) compounds having groups reactive toward isocyanates, (c) catalysts and optionally additional products to give a reaction mixture and converting the reaction mixture to a polyisocyanate polyaddition product, where the compounds (b) comprise a polyester polyalcohol as adhesion promoter, capable of production via polycondensation of an acid component and one or more low-molecular-weight diols whose molar mass is less than 500 g/mol, in excess, where the acid component comprises from 83 to 97 mol % of adipic acid and from 3 to 17 mol % of phthalic acid, isophthalic acid, and/or terephthalic acid. The present invention also relates to components in the fitting-out or aircraft, of vehicles, or of buildings, and to insulation comprising this type of composite element.

First claim

The invention claimed is:

1. A composite element, comprising
(i) plastic, adhering to which there is
(ii) a polyisocyanate polyaddition product, obtained by a process comprising mixing
component A comprising isocyanate and optionally a catalyst
with
component B comprising a compound having a group reactive toward isocyanate, a catalyst, optionally a blowing agent, and optionally a further additive,
to obtain a reaction mixture, and permitting the reaction mixture to complete its reaction to give the polyisocyanate polyaddition product,
wherein the polyisocyanate polyaddition product is obtained by a process that does not comprise forming a polyisocyanate prepolymer,
the compound having a group reactive toward isocyanate comprises a polyester polyalcohol as an adhesion promoter,
the polyester polyalcohol is produced by polycondensation of an acid component with at least one low-molecular-weight diol whose molar mass is less than 500 g/mol, in excess, such that the acid component comprises from 83 to 97 mol % of adipic acid and from 3 to 17 mol % of phthalic acid, isophthalic acid, terephthalic acid, or a combination thereof, and
the polyester polyalcohol is not crystallized or flocculated.

2. The composite element according to claim 1 , wherein the acid component comprises no further di- or polybasic carboxylic acids other than adipic acid and phthalic acid, isophthalic acid, terephthalic acid, or a combination thereof.

3. The composite element according to claim 1 , wherein the acid component comprises adipic acid and isophthalic acid.

4. The composite element according to claim 1 , wherein the low-molecular-weight diol is monoethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, or 1,6-hexanediol.

5. The composite element according to claim 1 , wherein a hydroxy number of the adhesion promoter is from 40 to 100.

6. The composite element according to claim 1 , wherein a proportion of the adhesion promoter is from 0.5 to 10% by weight, based on a total weight of the compound b) having a group reactive toward isocyanate.

7. The composite element according to claim 1 , wherein the polyisocyanate polyaddition product (ii) is a compact polyurethane, a flexible polyurethane foam, a semirigid polyurethane foam, or an integral foam.

8. The composite element according to claim 1 , wherein the plastic (i) is a thermoplastic.

9. The composite element according to claim 1 , wherein the plastic (i) is insulation for an electrical conductor.

10. A component comprising the composite element according to claim 1 , wherein the component is suitable in the fitting out of an aircraft, a vehicle, or of a building.

11. The component according to claim 10 , which is sheathing of an electrical conductor.

12. The composite element according to claim 1 , wherein component A comprises a catalyst.

13. The composite element according to claim 12 , wherein the catalyst is a tertiary amine and/or organometallic compound.

14. The composite element according to claim 1 , wherein component B comprises a blowing agent.

15. The composite element of claim 1 , wherein peeling of the polyisocyanate polyaddition product from the plastic, at 24 hours after the reaction mixture completes its reaction, results in cohesive fracture of the polyisocyanate polyaddition product, and does not result in adhesive fracture of the polyisocyanate polyaddition product.

16. The composite element of claim 1 , wherein component B is configured to be stored at temperatures as low as 13° C. without crystallization and without being below a pour point thereof.

17. A composite element, comprising
(i) plastic, adhering to which there is
(ii) a polyisocyanate polyaddition product, obtained by a process comprising mixing
component A comprising isocyanate and optionally a catalyst
with
component B comprising a compound having a group reactive toward isocyanate, a catalyst, optionally a blowing agent, and optionally a further additive,
to obtain a reaction mixture, and permitting the reaction mixture to complete its reaction to give the polyisocyanate polyaddition product,
wherein the polyisocyanate polyaddition product is obtained by a process that does not comprise forming a polyisocyanate prepolymer,
the compound having a group reactive toward isocyanate comprises a polyester polyalcohol as an adhesion promoter,
the polyester polyalcohol is produced by polycondensation of an acid component with at least one low-molecular-weight diol whose molar mass is less than 500 g/mol, in excess, such that the low-molecular-weight diol comprises from 5 to 66 mol % of 1,3-propanediol, based on a total amount of the at least one low-molecular weight diol, and
the polyester polyalcohol is not crystallized or flocculated.

18. The composite element according to claim 17 , wherein the acid component comprises at least 90% by weight of adipic acid.

19. The composite element according to claim 17 , wherein the low-molecular-weight diol further comprises at least one further diol selected from the group consisting of monoethylene glycol, 1,4 butanediol, 1,5-pentanediol, and 1,6-hexanediol.

20. The composite element of claim 17 , wherein peeling of the polyisocyanate polyaddition product from the plastic, at 24 hours after the reaction mixture completes its reaction, results in cohesive fracture of the polyisocyanate polyaddition product, and does not result in adhesive fracture of the polyisocyanate polyaddition product.

21. The composite element of claim 17 , wherein component B is configured to be stored at temperatures as low as 13° C. without crystallization and without being below a pour point thereof.

22. A composite element, comprising:
(i) plastic, adhering to which there is
(ii) a polyisocyanate polyaddition product, obtained by a process comprising mixing
component A comprising a polyisocyanate prepolymer and optionally a catalyst
with
component B comprising a compound having a group reactive toward isocyanate, a catalyst, optionally a blowing agent, and optionally a further additive,
to obtain a reaction mixture, and permitting the reaction mixture to complete its reaction to give the polyisocyanate polyaddition product,
wherein the polyisocyanate prepolymer is obtained by a process comprising reacting an excess of polyisocyanate with a polyol,
the polyol reacted to form the polyisocyanate prepolymer has a content of at most 3.0% by weight of polyester, or lacks any polyester,
the compound having a group reactive toward isocyanate comprises a polyester polyalcohol as an adhesion promoter,
the polyester polyalcohol is produced by polycondensation of an acid component with at least one low-molecular-weight diol whose molar mass is less than 500 g/mol, in excess, such that the acid component comprises from 83 to 97 mol % of adipic acid and from 3 to 17 mol % of phthalic acid, isophthalic acid, terephthalic acid, or a combination thereof, and
the polyester polyalcohol is not crystallized or flocculated.

23. The composite element of claim 22 , wherein peeling of the polyisocyanate polyaddition product from the plastic, at 24 hours after the reaction mixture completes its reaction, results in cohesive fracture of the polyisocyanate polyaddition product, and does not result in adhesive fracture of the polyisocyanate polyaddition product.

24. The composite element of claim 22 , wherein component B is configured to be stored at temperatures as low as 13° C. without cr

Assignees

• Renner Christian
• Tischer Gerlinde
• Illguth Rolf
• Gehring Margit
• Redl Franz Xaver
• Basf Se

Inventors

• Renner Christian
• Tischer Gerlinde
• Illguth Rolf
• Gehring Margit
• Redl Franz Xaver

Classifications

• B32B2307/7265

  Non-permeable · CPC title

• C08G18/4216

  from mixtures or combinations of aromatic dicarboxylic acids and aliphatic dicarboxylic acids and dialcohols · CPC title

• B32B5/18

  characterised by features of a layer {of} foamed material · CPC title

• B32B2266/0278

  Polyurethane · CPC title

• C08G18/4018

  Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48 · CPC title