POLYURETHANE PULTRUSION ARTICLE

• US 20190127538A1
• Filed: 12/21/2015
• Published: 05/02/2019
• Est. Priority Date: 12/24/2014
• Status: Active Grant

• Current Assignee: Covestro Deutschland AG
• Original Assignee: Covestro Deutschland AG
• Inventors: Zhang, Chenxi, Chen, Zhan (James), Li, Zhijiang, Wu, Fei, Zhao, Hui
• Granted Patent: US 10,442,905 B2
• Time in Patent Office: Days
• CPC Class Codes: B29C 70/52 Pultrusion, i.e. forming and compressing by continuously pulling through a die
• CPC Class Codes: B29K 2075/00 Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
• CPC Class Codes: B32B 5/00 Layered products characterised by the non- homogeneity or physical structure , i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
• CPC Class Codes: C08G 18/246 containing also tin-carbon bonds
• CPC Class Codes: C08G 18/3206 aliphatic
• CPC Class Codes: C08G 18/4812 Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
• CPC Class Codes: C08G 18/4816 mixtures of two or more polyetherpolyols having at least three hydroxy groups
• CPC Class Codes: C08G 18/4825 Polyethers containing two hydroxy groups C08G18/4833 - C08G18/5096 take precedence
• CPC Class Codes: C08G 18/4829 Polyethers containing at least three hydroxy groups C08G18/4833 - C08G18/5096 take precedence
• CPC Class Codes: C08G 18/6677 having at least three hydroxy groups
• CPC Class Codes: C08G 18/7664 containing alkylene polyphenyl groups
• CPC Class Codes: C08J 2375/08 from polyethers
• CPC Class Codes: C08J 2427/12 containing fluorine atoms
• CPC Class Codes: C08J 2427/16 Homopolymers or copolymers of vinylidene fluoride
• CPC Class Codes: C08J 5/043 with glass fibres
• CPC Class Codes: C08J 5/10 characterised by the additives used in the polymer mixture
• CPC Class Codes: C08J 7/042 with two or more layers, where at least one layer of a composition contains a polymer binder
• CPC Class Codes: C08J 7/0427 with only one layer of a composition containing a polymer binder with more layers C08J7/042
• CPC Class Codes: C08K 5/0066 Flame-proofing or flame-retarding additives

Abstract

The invention provides a polyurethane pultrusion article comprising a polyurethane pultrusion composite and a coating layer applied thereon, wherein the polyurethane pultrusion composite comprises a polyurethane resin matrix and a reinforcement material, and is prepared by a polyurethane pultrusion process, wherein the polyurethane resin matrix is prepared from a polyurethane composition comprising: A) an isocyanate component comprising one or more polyisocyanates; B) an isocyanate-reactive component comprising: b1) a first polyether polyol having a functionality of 2-3 and a hydroxyl number of 10-120 mgKOH/g; b2) a second polyether polyol having a functionality of 3-8 and a hydroxyl number of 810-1900 mgKOH/g; b4) one or more isocyanate-reactive flame retardants. The polyurethane pultrusion article provided by the invention has both favorable flame retardance and good adhesion between the coating layer and the composite.

Claims

1. A polyurethane pultrusion article, comprising a polyurethane pultrusion composite and a coating layer applied thereon, wherein the polyurethane pultrusion composite comprises a polyurethane resin matrix and a reinforcement material, and is prepared by a polyurethane pultrusion process, wherein the polyurethane resin matrix is prepared from a polyurethane composition comprising:

A) an isocyanate component comprising one or more polyisocyanates; and

B) an isocyanate-reactive component comprising;

b1) a first polyether polyol having a functionality of 2-3 and a hydroxyl number of 10-120 mgKOH/g;

b2) a second polyether polyol having a functionality of 3-8 and a hydroxyl number of 810-1900 mgKOH/g; and

b4) one or more isocyanate-reactive flame retardants.

2. The polyurethane pultrusion article according to claim 1, wherein the isocyanate-reactive flame retardant b4) comprises halogen and/or phosphorus.

3. The polyurethane pultrusion article according to claim 2, wherein the isocyanate-reactive flame retardant b4) is selected from the group consisting of:

aromatic or aliphatic bromide alcohol, aromatic or aliphatic bromide diol, aromatic or aliphatic bromide triol, halogenated aliphatic polyether diol, halogenated aliphatic polyether triol, and combinations of any thereof.

4. The polyurethane pultrusion article according to claim 1, wherein the coating layer is prepared from fluoroalkene—

vinyl ether coating and/or polyvinylidene fluoride coating.

5. The polyurethane pultrusion article according to claim 1, wherein the reinforcement material is selected from the group consisting of:

glass fibers, carbon nanotubes, carbon fibers, polyester fibers, natural fibers, aramid fibers, nylon fibers, basalt fibers, boron fibers, silicon carbide fibers, asbestos fibers, whiskers, hard particles, metal fibers and combinations of any thereof.

6. The polyurethane pultrusion article according to claim 5, wherein the amount of reinforcement material is 60-85 wt. % based on 100% by weight of the polyurethane pultrusion composite.

7. The polyurethane pultrusion article according to claim 1, wherein the isocyanate-reactive component B) further comprises:

b3) a third polyether polyol having a functionality of 3-8 and a hydroxyl number of 150-800 mgKOH/g.

8. The polyurethane pultrusion article according to claim 1, wherein the coating layer is prepared by spin coating, knife coating, micro-gravure coating, direct gravure coating, offset gravure coating, reverse gravure coating, reverse roll coating, bar coating, die coating, spray coating, or dip coating.